change PWM period with buttons

added frequency display
second PWM output on PF3
2025-04-24 12:07:27 -04:00 · 2025-04-24 11:52:52 -04:00 · 2025-04-24 11:19:50 -04:00 · 2025-04-24 11:11:11 -04:00 · 2025-04-24 10:55:49 -04:00 · 2025-04-24 10:40:44 -04:00
31 changed files with 1080 additions and 181 deletions
--- a/.config/.productview.dat
+++ b/.config/.productview.dat
--- a/.config/xconfig_rtos/.buildtime
+++ b/.config/xconfig_rtos/.buildtime
@ -1 +1 @@
-C:\Users\askillorin\Downloads\ECE3849-tirtos\ece3849_lab3_starter\.config\xconfig_rtos\.buildtime
+C:\Users\askillorin\Documents\ece3849_lab3_starter\.config\xconfig_rtos\.buildtime
--- a/.config/xconfig_rtos/.xdcenv.mak
+++ b/.config/xconfig_rtos/.xdcenv.mak
@ -1,7 +1,7 @@
 #
 _XDCBUILDCOUNT = 0
 ifneq (,$(findstring path,$(_USEXDCENV_)))
-override XDCPATH = C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages;C:/ti/ccs1271/ccs/ccs_base;C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config
+override XDCPATH = C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages;C:/ti/ccs1271/ccs/ccs_base;C:/Users/askillorin/Documents/ece3849_lab3_starter/.config
 override XDCROOT = C:/ti/ccs1271/xdctools_3_32_00_06_core
 override XDCBUILDCFG = ./config.bld
 endif
@ -11,6 +11,6 @@ override XDCTARGETS =
 endif
 #
 ifeq (0,1)
-PKGPATH = C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages;C:/ti/ccs1271/ccs/ccs_base;C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config;C:/ti/ccs1271/xdctools_3_32_00_06_core/packages;..
+PKGPATH = C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages;C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages;C:/ti/ccs1271/ccs/ccs_base;C:/Users/askillorin/Documents/ece3849_lab3_starter/.config;C:/ti/ccs1271/xdctools_3_32_00_06_core/packages;..
 HOSTOS = Windows
 endif
--- a/.config/xconfig_rtos/compiler.opt
+++ b/.config/xconfig_rtos/compiler.opt
@ -1 +1 @@
--endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages" -I"C:/ti/ccs1271/ccs/ccs_base" -I"C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config" -I"C:/ti/ccs1271/xdctools_3_32_00_06_core/packages" -I"C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config/xconfig_rtos/.." -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include/rts -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include  -Dxdc_target_types__="ti/targets/arm/elf/std.h" -Dxdc_target_name__=M4F -Dxdc_cfg__xheader__="\"C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config/xconfig_rtos/package/cfg/rtos_pem4f.h\""
+--endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages" -I"C:/ti/ccs1271/ccs/ccs_base" -I"C:/Users/askillorin/Documents/ece3849_lab3_starter/.config" -I"C:/ti/ccs1271/xdctools_3_32_00_06_core/packages" -I"C:/Users/askillorin/Documents/ece3849_lab3_starter/.config/xconfig_rtos/.." -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include/rts -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include  -Dxdc_target_types__="ti/targets/arm/elf/std.h" -Dxdc_target_name__=M4F -Dxdc_cfg__xheader__="\"C:/Users/askillorin/Documents/ece3849_lab3_starter/.config/xconfig_rtos/package/cfg/rtos_pem4f.h\""
--- a/.config/xconfig_rtos/compiler.opt.defs
+++ b/.config/xconfig_rtos/compiler.opt.defs
@ -1 +1 @@
-I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages" -I"C:/ti/ccs1271/ccs/ccs_base" -I"C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config" -I"C:/ti/ccs1271/xdctools_3_32_00_06_core/packages" -I"C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config/xconfig_rtos/.." -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include/rts -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include  -Dxdc_target_types__="ti/targets/arm/elf/std.h" -Dxdc_target_name__=M4F -Dxdc_cfg__xheader__="\"C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config/xconfig_rtos/package/cfg/rtos_pem4f.h\""
+-I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/tidrivers_tivac_2_16_01_13/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ndk_2_25_00_09/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/uia_2_00_05_50/packages" -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/ns_1_11_00_10/packages" -I"C:/ti/ccs1271/ccs/ccs_base" -I"C:/Users/askillorin/Documents/ece3849_lab3_starter/.config" -I"C:/ti/ccs1271/xdctools_3_32_00_06_core/packages" -I"C:/Users/askillorin/Documents/ece3849_lab3_starter/.config/xconfig_rtos/.." -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include/rts -IC:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include  -Dxdc_target_types__="ti/targets/arm/elf/std.h" -Dxdc_target_name__=M4F -Dxdc_cfg__xheader__="\"C:/Users/askillorin/Documents/ece3849_lab3_starter/.config/xconfig_rtos/package/cfg/rtos_pem4f.h\""
--- a/.config/xconfig_rtos/config.bld
+++ b/.config/xconfig_rtos/config.bld
@ -16,7 +16,7 @@ if (!(target instanceof xdc.module("xdc.bld.ITarget").Module)) {
 }

 /* configuro was passed compiler options explicitly */
-target.ccOpts.prefix = unescape("-mv7M4%20--code_state%3D16%20--float_support%3DFPv4SPD16%20-me%20-O1%20--opt_for_speed%3D2%20--include_path%3D%22C%3A/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix%22%20--include_path%3D%22C%3A/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include%22%20--define%3Dccs%3D%22ccs%22%20--define%3DPART_TM4C1294NCPDT%20--define%3Dccs%20--define%3DTIVAWARE%20-g%20--gcc%20--diag_warning%3D225%20--diag_warning%3D255%20--diag_wrap%3Doff%20--display_error_number%20--gen_func_subsections%3Don%20--abi%3Deabi%20%20%20") + target.ccOpts.prefix;
+target.ccOpts.prefix = unescape("-mv7M4%20--code_state%3D16%20--float_support%3DFPv4SPD16%20-me%20-O1%20--opt_for_speed%3D2%20--include_path%3D%22C%3A/Users/askillorin/Documents/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/Users/askillorin/Documents/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix%22%20--include_path%3D%22C%3A/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include%22%20--define%3Dccs%3D%22ccs%22%20--define%3DPART_TM4C1294NCPDT%20--define%3Dccs%20--define%3DTIVAWARE%20-g%20--gcc%20--diag_warning%3D225%20--diag_warning%3D255%20--diag_wrap%3Doff%20--display_error_number%20--gen_func_subsections%3Don%20--abi%3Deabi%20%20%20") + target.ccOpts.prefix;

 /* configuro was passed the target's rootDir explicitly */
 target.rootDir = 'C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS';
--- a/.config/xconfig_rtos/custom.mak
+++ b/.config/xconfig_rtos/custom.mak
@ -7,5 +7,5 @@
 #       or equal to the generated config header
 #
 linker.cmd: package/cfg/rtos_pem4f.xdl
-	$(SED) 's"^\"\(package/cfg/rtos_pem4fcfg.cmd\)\"$""\"C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config/xconfig_rtos/\1\""' package/cfg/rtos_pem4f.xdl > $@
+	$(SED) 's"^\"\(package/cfg/rtos_pem4fcfg.cmd\)\"$""\"C:/Users/askillorin/Documents/ece3849_lab3_starter/.config/xconfig_rtos/\1\""' package/cfg/rtos_pem4f.xdl > $@
 	-$(SETDATE) -r:max package/cfg/rtos_pem4f.h compiler.opt compiler.opt.defs
--- a/.config/xconfig_rtos/package.bld
+++ b/.config/xconfig_rtos/package.bld
@ -11,7 +11,7 @@ var makeAssembly = false;
 var Executable = xdc.module('xdc.bld.Executable');

 var exeOpts = new Executable.Attrs({
-        cfgScript: 'C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/rtos.cfg',
+        cfgScript: 'C:/Users/askillorin/Documents/ece3849_lab3_starter/rtos.cfg',
        profile: 'release',
        cfgHome: 'xconfig_rtos',
 });
@ -40,8 +40,8 @@ else {
 }

 var thisObj = {
-    cfg:        'C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/rtos.cfg',
-    outputPath: 'C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/.config/xconfig_rtos',
+    cfg:        'C:/Users/askillorin/Documents/ece3849_lab3_starter/rtos.cfg',
+    outputPath: 'C:/Users/askillorin/Documents/ece3849_lab3_starter/.config/xconfig_rtos',
    exeName:    'rtos' + suffix,
    exeIntName: 'rtos' + suffix.replace('.', '_'),
    targ:       targ,
--- a/.config/xconfig_rtos/package/cfg/rtos_pem4f.cfg
+++ b/.config/xconfig_rtos/package/cfg/rtos_pem4f.cfg
@ -76,7 +76,7 @@ function _cfginit() {
    /* initialize prog attrs from build model */
    var build = {
        profile: "release",
-        cfgScript: "C%3A/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/rtos.cfg",
+        cfgScript: "C%3A/Users/askillorin/Documents/ece3849_lab3_starter/rtos.cfg",
        cfgHome: "xconfig_rtos",
        cfgArgs: "null",
        cfgArgsEncoded: true,
@ -121,7 +121,7 @@ function _cfginit() {
        },
        rootDir: "C%3A/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS",
        ccOpts: {
-            prefix: "-mv7M4%20--code_state%3D16%20--float_support%3DFPv4SPD16%20-me%20-O1%20--opt_for_speed%3D2%20--include_path%3D%22C%3A/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix%22%20--include_path%3D%22C%3A/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include%22%20--define%3Dccs%3D%22ccs%22%20--define%3DPART_TM4C1294NCPDT%20--define%3Dccs%20--define%3DTIVAWARE%20-g%20--gcc%20--diag_warning%3D225%20--diag_warning%3D255%20--diag_wrap%3Doff%20--display_error_number%20--gen_func_subsections%3Don%20--abi%3Deabi%20%20%20-qq%20-pdsw225"
+            prefix: "-mv7M4%20--code_state%3D16%20--float_support%3DFPv4SPD16%20-me%20-O1%20--opt_for_speed%3D2%20--include_path%3D%22C%3A/Users/askillorin/Documents/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/Users/askillorin/Documents/ece3849_lab3_starter%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b%22%20--include_path%3D%22C%3A/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix%22%20--include_path%3D%22C%3A/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include%22%20--define%3Dccs%3D%22ccs%22%20--define%3DPART_TM4C1294NCPDT%20--define%3Dccs%20--define%3DTIVAWARE%20-g%20--gcc%20--diag_warning%3D225%20--diag_warning%3D255%20--diag_wrap%3Doff%20--display_error_number%20--gen_func_subsections%3Don%20--abi%3Deabi%20%20%20-qq%20-pdsw225"
        },
        rawVersion: "20.2.7"
    };
@ -179,7 +179,7 @@ function _userscript(script) {

    xdc.om.$$bind('$homepkg', home);

-    var cfgScript = "C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/rtos.cfg";
+    var cfgScript = "C:/Users/askillorin/Documents/ece3849_lab3_starter/rtos.cfg";
    if (!script) {
        utils.loadCapsule(cfgScript, false, spath);
    }
--- a/.config/xconfig_rtos/package/cfg/rtos_pem4f.mak
+++ b/.config/xconfig_rtos/package/cfg/rtos_pem4f.mak
@ -15,8 +15,8 @@ package/cfg/rtos_pem4f.oem4f: package/cfg/rtos_pem4f.c package/cfg/rtos_pem4f.ma
 	@$(RM) $@.dep
 	$(RM) $@
 	@$(MSG) clem4f $< ...
-	$(ti.targets.arm.elf.M4F.rootDir)/bin/armcl -c  -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 -ms --fp_mode=strict --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg -fc $<
-	$(MKDEP) -a $@.dep -p package/cfg -s oem4f $< -C   -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 -ms --fp_mode=strict --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg
+	$(ti.targets.arm.elf.M4F.rootDir)/bin/armcl -c  -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 -ms --fp_mode=strict --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg -fc $<
+	$(MKDEP) -a $@.dep -p package/cfg -s oem4f $< -C   -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 -ms --fp_mode=strict --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg
 	-@$(FIXDEP) $@.dep $@.dep
 	
 package/cfg/rtos_pem4f.oem4f: export C_DIR=
@ -28,8 +28,8 @@ package/cfg/rtos_pem4f.sem4f: package/cfg/rtos_pem4f.c package/cfg/rtos_pem4f.ma
 	@$(RM) $@.dep
 	$(RM) $@
 	@$(MSG) clem4f -n $< ...
-	$(ti.targets.arm.elf.M4F.rootDir)/bin/armcl -c -n -s --symdebug:none -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg -fc $<
-	$(MKDEP) -a $@.dep -p package/cfg -s oem4f $< -C  -n -s --symdebug:none -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg
+	$(ti.targets.arm.elf.M4F.rootDir)/bin/armcl -c -n -s --symdebug:none -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg -fc $<
+	$(MKDEP) -a $@.dep -p package/cfg -s oem4f $< -C  -n -s --symdebug:none -mv7M4 --code_state=16 --float_support=FPv4SPD16 -me -O1 --opt_for_speed=2 --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" --define=ccs="ccs" --define=PART_TM4C1294NCPDT --define=ccs --define=TIVAWARE -g --gcc --diag_warning=225 --diag_warning=255 --diag_wrap=off --display_error_number --gen_func_subsections=on --abi=eabi   -qq -pdsw225 --endian=little -mv7M4 --abi=eabi --float_support=fpv4spd16 -eo.oem4f -ea.sem4f   -Dxdc_cfg__xheader__='"xconfig_rtos/package/cfg/rtos_pem4f.h"'  -Dxdc_target_name__=M4F -Dxdc_target_types__=ti/targets/arm/elf/std.h -Dxdc_bld__profile_release -Dxdc_bld__vers_1_0_20_2_7 -O2  $(XDCINCS) -I$(ti.targets.arm.elf.M4F.rootDir)/include/rts -I$(ti.targets.arm.elf.M4F.rootDir)/include  -fs=./package/cfg -fr=./package/cfg
 	-@$(FIXDEP) $@.dep $@.dep
 	
 package/cfg/rtos_pem4f.sem4f: export C_DIR=
--- a/.config/xconfig_rtos/package/package.bld.xml
+++ b/.config/xconfig_rtos/package/package.bld.xml
@ -7,7 +7,7 @@
        <srcFile name="package/cfg/rtos_pem4f.c"/>
    </sources>
    <configscripts>
-        <srcFile name="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/rtos.cfg"/>
+        <srcFile name="C:/Users/askillorin/Documents/ece3849_lab3_starter/rtos.cfg"/>
    </configscripts>
    <makefiles>
        <srcFile name="package.mak" src="package.bld"/>
@ -44,7 +44,7 @@
        isPartial="false"
        xCfgScript="package/cfg/rtos_pem4f.cfg"
        xCfgPrefix="package/cfg/rtos_pem4f"
-        cfgScript="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/rtos.cfg"
+        cfgScript="C:/Users/askillorin/Documents/ece3849_lab3_starter/rtos.cfg"
        cfgArgs="null"
        />
    </configurations>
@ -56,7 +56,7 @@
        profile="release"
        xCfgScript="package/cfg/rtos_pem4f.cfg"
        xCfgPrefix="package/cfg/rtos_pem4f"
-        cfgScript="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter/rtos.cfg"
+        cfgScript="C:/Users/askillorin/Documents/ece3849_lab3_starter/rtos.cfg"
        cfgArgs="null"
        />
    </executables>
--- a/.config/xconfig_rtos/package/xconfig_rtos.ccs
+++ b/.config/xconfig_rtos/package/xconfig_rtos.ccs
--- a/.gitignore
+++ b/.gitignore
@ -1 +1,3 @@
 Debug/
+/.metadata/
+.jxbrowser.userdata/
--- a/RemoteSystemsTempFiles/.project
+++ b/RemoteSystemsTempFiles/.project
@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>RemoteSystemsTempFiles</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.rse.ui.remoteSystemsTempNature</nature>
+	</natures>
+</projectDescription>
--- a/_kiss_fft_guts.h
+++ b/_kiss_fft_guts.h
@ -0,0 +1,164 @@
+/*
+Copyright (c) 2003-2010, Mark Borgerding
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/* kiss_fft.h
+   defines kiss_fft_scalar as either short or a float type
+   and defines
+   typedef struct { kiss_fft_scalar r; kiss_fft_scalar i; }kiss_fft_cpx; */
+#include "kiss_fft.h"
+#include <limits.h>
+
+#define MAXFACTORS 32
+/* e.g. an fft of length 128 has 4 factors 
+ as far as kissfft is concerned
+ 4*4*4*2
+ */
+
+struct kiss_fft_state{
+    int nfft;
+    int inverse;
+    int factors[2*MAXFACTORS];
+    kiss_fft_cpx twiddles[1];
+};
+
+/*
+  Explanation of macros dealing with complex math:
+
+   C_MUL(m,a,b)         : m = a*b
+   C_FIXDIV( c , div )  : if a fixed point impl., c /= div. noop otherwise
+   C_SUB( res, a,b)     : res = a - b
+   C_SUBFROM( res , a)  : res -= a
+   C_ADDTO( res , a)    : res += a
+ * */
+#ifdef FIXED_POINT
+#if (FIXED_POINT==32)
+# define FRACBITS 31
+# define SAMPPROD int64_t
+#define SAMP_MAX 2147483647
+#else
+# define FRACBITS 15
+# define SAMPPROD int32_t 
+#define SAMP_MAX 32767
+#endif
+
+#define SAMP_MIN -SAMP_MAX
+
+#if defined(CHECK_OVERFLOW)
+#  define CHECK_OVERFLOW_OP(a,op,b)  \
+	if ( (SAMPPROD)(a) op (SAMPPROD)(b) > SAMP_MAX || (SAMPPROD)(a) op (SAMPPROD)(b) < SAMP_MIN ) { \
+		fprintf(stderr,"WARNING:overflow @ " __FILE__ "(%d): (%d " #op" %d) = %ld\n",__LINE__,(a),(b),(SAMPPROD)(a) op (SAMPPROD)(b) );  }
+#endif
+
+
+#   define smul(a,b) ( (SAMPPROD)(a)*(b) )
+#   define sround( x )  (kiss_fft_scalar)( ( (x) + (1<<(FRACBITS-1)) ) >> FRACBITS )
+
+#   define S_MUL(a,b) sround( smul(a,b) )
+
+#   define C_MUL(m,a,b) \
+      do{ (m).r = sround( smul((a).r,(b).r) - smul((a).i,(b).i) ); \
+          (m).i = sround( smul((a).r,(b).i) + smul((a).i,(b).r) ); }while(0)
+
+#   define DIVSCALAR(x,k) \
+	(x) = sround( smul(  x, SAMP_MAX/k ) )
+
+#   define C_FIXDIV(c,div) \
+	do {    DIVSCALAR( (c).r , div);  \
+		DIVSCALAR( (c).i  , div); }while (0)
+
+#   define C_MULBYSCALAR( c, s ) \
+    do{ (c).r =  sround( smul( (c).r , s ) ) ;\
+        (c).i =  sround( smul( (c).i , s ) ) ; }while(0)
+
+#else  /* not FIXED_POINT*/
+
+#   define S_MUL(a,b) ( (a)*(b) )
+#define C_MUL(m,a,b) \
+    do{ (m).r = (a).r*(b).r - (a).i*(b).i;\
+        (m).i = (a).r*(b).i + (a).i*(b).r; }while(0)
+#   define C_FIXDIV(c,div) /* NOOP */
+#   define C_MULBYSCALAR( c, s ) \
+    do{ (c).r *= (s);\
+        (c).i *= (s); }while(0)
+#endif
+
+#ifndef CHECK_OVERFLOW_OP
+#  define CHECK_OVERFLOW_OP(a,op,b) /* noop */
+#endif
+
+#define  C_ADD( res, a,b)\
+    do { \
+	    CHECK_OVERFLOW_OP((a).r,+,(b).r)\
+	    CHECK_OVERFLOW_OP((a).i,+,(b).i)\
+	    (res).r=(a).r+(b).r;  (res).i=(a).i+(b).i; \
+    }while(0)
+#define  C_SUB( res, a,b)\
+    do { \
+	    CHECK_OVERFLOW_OP((a).r,-,(b).r)\
+	    CHECK_OVERFLOW_OP((a).i,-,(b).i)\
+	    (res).r=(a).r-(b).r;  (res).i=(a).i-(b).i; \
+    }while(0)
+#define C_ADDTO( res , a)\
+    do { \
+	    CHECK_OVERFLOW_OP((res).r,+,(a).r)\
+	    CHECK_OVERFLOW_OP((res).i,+,(a).i)\
+	    (res).r += (a).r;  (res).i += (a).i;\
+    }while(0)
+
+#define C_SUBFROM( res , a)\
+    do {\
+	    CHECK_OVERFLOW_OP((res).r,-,(a).r)\
+	    CHECK_OVERFLOW_OP((res).i,-,(a).i)\
+	    (res).r -= (a).r;  (res).i -= (a).i; \
+    }while(0)
+
+
+#ifdef FIXED_POINT
+#  define KISS_FFT_COS(phase)  floor(.5+SAMP_MAX * cos (phase))
+#  define KISS_FFT_SIN(phase)  floor(.5+SAMP_MAX * sin (phase))
+#  define HALF_OF(x) ((x)>>1)
+#elif defined(USE_SIMD)
+#  define KISS_FFT_COS(phase) _mm_set1_ps( cos(phase) )
+#  define KISS_FFT_SIN(phase) _mm_set1_ps( sin(phase) )
+#  define HALF_OF(x) ((x)*_mm_set1_ps(.5))
+#else
+#  define KISS_FFT_COS(phase) (kiss_fft_scalar) cos(phase)
+#  define KISS_FFT_SIN(phase) (kiss_fft_scalar) sin(phase)
+#  define HALF_OF(x) ((x)*.5)
+#endif
+
+#define  kf_cexp(x,phase) \
+	do{ \
+		(x)->r = KISS_FFT_COS(phase);\
+		(x)->i = KISS_FFT_SIN(phase);\
+	}while(0)
+
+
+/* a debugging function */
+#define pcpx(c)\
+    fprintf(stderr,"%g + %gi\n",(double)((c)->r),(double)((c)->i) )
+
+
+#ifdef KISS_FFT_USE_ALLOCA
+// define this to allow use of alloca instead of malloc for temporary buffers
+// Temporary buffers are used in two case: 
+// 1. FFT sizes that have "bad" factors. i.e. not 2,3 and 5
+// 2. "in-place" FFTs.  Notice the quotes, since kissfft does not really do an in-place transform.
+#include <alloca.h>
+#define  KISS_FFT_TMP_ALLOC(nbytes) alloca(nbytes)
+#define  KISS_FFT_TMP_FREE(ptr) 
+#else
+#define  KISS_FFT_TMP_ALLOC(nbytes) KISS_FFT_MALLOC(nbytes)
+#define  KISS_FFT_TMP_FREE(ptr) KISS_FFT_FREE(ptr)
+#endif
--- a/frequency.c
+++ b/frequency.c
@ -0,0 +1,77 @@
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "driverlib/sysctl.h"
+#include "driverlib/gpio.h"
+#include "driverlib/timer.h"
+#include "driverlib/pin_map.h"
+#include "inc/tm4c1294ncpdt.h"
+#include "driverlib/interrupt.h"
+#include "inc/hw_types.h"
+#include "inc/hw_memmap.h"
+#include "driverlib/fpu.h"
+#include <math.h>
+#include "driverlib/pwm.h"
+
+#include "frequency.h"
+
+// start a pwm test signal
+void start_signal() {
+  // configure M0PWM2, at GPIO PF2, BoosterPack 1 header C1 pin 2
+  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
+  GPIOPinTypePWM(GPIO_PORTF_BASE, GPIO_PIN_2 | GPIO_PIN_3);
+  GPIOPinConfigure(GPIO_PF2_M0PWM2);
+  GPIOPinConfigure(GPIO_PF3_M0PWM3);
+  GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_2 | GPIO_PIN_3, GPIO_STRENGTH_2MA,
+                   GPIO_PIN_TYPE_STD);
+  // configure the PWM0 peripheral, gen 1, outputs 2 and 3
+  SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);
+  // use system clock without division
+  PWMClockSet(PWM0_BASE, PWM_SYSCLK_DIV_1);
+  PWMGenConfigure(PWM0_BASE, PWM_GEN_1,
+                  PWM_GEN_MODE_DOWN | PWM_GEN_MODE_NO_SYNC);
+  gPWMPeriod = roundf((float)gSystemClock / PWM_FREQUENCY);
+  set_pwm_period(gPWMPeriod);
+  PWMOutputState(PWM0_BASE, PWM_OUT_2_BIT | PWM_OUT_3_BIT, true);
+  PWMGenEnable(PWM0_BASE, PWM_GEN_1);
+}
+
+void set_pwm_period(uint32_t period) {
+    PWMGenPeriodSet(PWM0_BASE, PWM_GEN_1,
+                    gPWMPeriod);
+    PWMPulseWidthSet(PWM0_BASE, PWM_OUT_2,
+                     roundf((float)gPWMPeriod * 0.4f));
+    PWMPulseWidthSet(PWM0_BASE, PWM_OUT_3,
+                     roundf((float)gPWMPeriod * 0.4f));
+}
+
+
+
+void start_frequency_scan() {
+    // config GPIO PD0 as timer input T0CCP0 at BoosterPack Connector #1 pin 14
+    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
+    GPIOPinTypeTimer(GPIO_PORTD_BASE, GPIO_PIN_0);
+    GPIOPinConfigure(GPIO_PD0_T0CCP0);
+    SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
+    TimerDisable(TIMER0_BASE, TIMER_BOTH);
+    TimerConfigure(TIMER0_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_CAP_TIME_UP);
+    TimerControlEvent(TIMER0_BASE, TIMER_A, TIMER_EVENT_POS_EDGE);
+    // use maximum load value
+    TimerLoadSet(TIMER0_BASE, TIMER_A, 0xffff);
+    // use maximum prescale value
+    TimerPrescaleSet(TIMER0_BASE, TIMER_A, 0xff);
+    TimerIntEnable(TIMER0_BASE, TIMER_CAPA_EVENT);
+    TimerEnable(TIMER0_BASE, TIMER_A);
+}
+
+uint32_t previous;
+void capture_handler() {
+    TimerIntClear(TIMER0_BASE, TIMER_CAPA_EVENT);
+
+    uint32_t current = TimerValueGet(TIMER0_BASE, TIMER_A);
+
+    uint32_t delta = current - previous;
+    gPeriod = delta;
+
+    previous = current;
+}
--- a/frequency.h
+++ b/frequency.h
@ -0,0 +1,12 @@
+#ifndef FREQUENCY_C
+#define FREQUENCY_C
+#define gSystemClock 120000000 // [Hz] system clock frequency
+
+#define PWM_FREQUENCY 20000 // PWM frequency = 20 kHz
+
+void start_frequency_scan(void);
+void set_pwm_period(uint32_t period);
+
+uint32_t gPeriod;
+uint32_t gPWMPeriod;
+#endif
--- a/kiss_fft.c
+++ b/kiss_fft.c
@ -0,0 +1,408 @@
+/*
+Copyright (c) 2003-2010, Mark Borgerding
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "_kiss_fft_guts.h"
+/* The guts header contains all the multiplication and addition macros that are defined for
+ fixed or floating point complex numbers.  It also delares the kf_ internal functions.
+ */
+
+static void kf_bfly2(
+        kiss_fft_cpx * Fout,
+        const size_t fstride,
+        const kiss_fft_cfg st,
+        int m
+        )
+{
+    kiss_fft_cpx * Fout2;
+    kiss_fft_cpx * tw1 = st->twiddles;
+    kiss_fft_cpx t;
+    Fout2 = Fout + m;
+    do{
+        C_FIXDIV(*Fout,2); C_FIXDIV(*Fout2,2);
+
+        C_MUL (t,  *Fout2 , *tw1);
+        tw1 += fstride;
+        C_SUB( *Fout2 ,  *Fout , t );
+        C_ADDTO( *Fout ,  t );
+        ++Fout2;
+        ++Fout;
+    }while (--m);
+}
+
+static void kf_bfly4(
+        kiss_fft_cpx * Fout,
+        const size_t fstride,
+        const kiss_fft_cfg st,
+        const size_t m
+        )
+{
+    kiss_fft_cpx *tw1,*tw2,*tw3;
+    kiss_fft_cpx scratch[6];
+    size_t k=m;
+    const size_t m2=2*m;
+    const size_t m3=3*m;
+
+
+    tw3 = tw2 = tw1 = st->twiddles;
+
+    do {
+        C_FIXDIV(*Fout,4); C_FIXDIV(Fout[m],4); C_FIXDIV(Fout[m2],4); C_FIXDIV(Fout[m3],4);
+
+        C_MUL(scratch[0],Fout[m] , *tw1 );
+        C_MUL(scratch[1],Fout[m2] , *tw2 );
+        C_MUL(scratch[2],Fout[m3] , *tw3 );
+
+        C_SUB( scratch[5] , *Fout, scratch[1] );
+        C_ADDTO(*Fout, scratch[1]);
+        C_ADD( scratch[3] , scratch[0] , scratch[2] );
+        C_SUB( scratch[4] , scratch[0] , scratch[2] );
+        C_SUB( Fout[m2], *Fout, scratch[3] );
+        tw1 += fstride;
+        tw2 += fstride*2;
+        tw3 += fstride*3;
+        C_ADDTO( *Fout , scratch[3] );
+
+        if(st->inverse) {
+            Fout[m].r = scratch[5].r - scratch[4].i;
+            Fout[m].i = scratch[5].i + scratch[4].r;
+            Fout[m3].r = scratch[5].r + scratch[4].i;
+            Fout[m3].i = scratch[5].i - scratch[4].r;
+        }else{
+            Fout[m].r = scratch[5].r + scratch[4].i;
+            Fout[m].i = scratch[5].i - scratch[4].r;
+            Fout[m3].r = scratch[5].r - scratch[4].i;
+            Fout[m3].i = scratch[5].i + scratch[4].r;
+        }
+        ++Fout;
+    }while(--k);
+}
+
+static void kf_bfly3(
+         kiss_fft_cpx * Fout,
+         const size_t fstride,
+         const kiss_fft_cfg st,
+         size_t m
+         )
+{
+     size_t k=m;
+     const size_t m2 = 2*m;
+     kiss_fft_cpx *tw1,*tw2;
+     kiss_fft_cpx scratch[5];
+     kiss_fft_cpx epi3;
+     epi3 = st->twiddles[fstride*m];
+
+     tw1=tw2=st->twiddles;
+
+     do{
+         C_FIXDIV(*Fout,3); C_FIXDIV(Fout[m],3); C_FIXDIV(Fout[m2],3);
+
+         C_MUL(scratch[1],Fout[m] , *tw1);
+         C_MUL(scratch[2],Fout[m2] , *tw2);
+
+         C_ADD(scratch[3],scratch[1],scratch[2]);
+         C_SUB(scratch[0],scratch[1],scratch[2]);
+         tw1 += fstride;
+         tw2 += fstride*2;
+
+         Fout[m].r = Fout->r - HALF_OF(scratch[3].r);
+         Fout[m].i = Fout->i - HALF_OF(scratch[3].i);
+
+         C_MULBYSCALAR( scratch[0] , epi3.i );
+
+         C_ADDTO(*Fout,scratch[3]);
+
+         Fout[m2].r = Fout[m].r + scratch[0].i;
+         Fout[m2].i = Fout[m].i - scratch[0].r;
+
+         Fout[m].r -= scratch[0].i;
+         Fout[m].i += scratch[0].r;
+
+         ++Fout;
+     }while(--k);
+}
+
+static void kf_bfly5(
+        kiss_fft_cpx * Fout,
+        const size_t fstride,
+        const kiss_fft_cfg st,
+        int m
+        )
+{
+    kiss_fft_cpx *Fout0,*Fout1,*Fout2,*Fout3,*Fout4;
+    int u;
+    kiss_fft_cpx scratch[13];
+    kiss_fft_cpx * twiddles = st->twiddles;
+    kiss_fft_cpx *tw;
+    kiss_fft_cpx ya,yb;
+    ya = twiddles[fstride*m];
+    yb = twiddles[fstride*2*m];
+
+    Fout0=Fout;
+    Fout1=Fout0+m;
+    Fout2=Fout0+2*m;
+    Fout3=Fout0+3*m;
+    Fout4=Fout0+4*m;
+
+    tw=st->twiddles;
+    for ( u=0; u<m; ++u ) {
+        C_FIXDIV( *Fout0,5); C_FIXDIV( *Fout1,5); C_FIXDIV( *Fout2,5); C_FIXDIV( *Fout3,5); C_FIXDIV( *Fout4,5);
+        scratch[0] = *Fout0;
+
+        C_MUL(scratch[1] ,*Fout1, tw[u*fstride]);
+        C_MUL(scratch[2] ,*Fout2, tw[2*u*fstride]);
+        C_MUL(scratch[3] ,*Fout3, tw[3*u*fstride]);
+        C_MUL(scratch[4] ,*Fout4, tw[4*u*fstride]);
+
+        C_ADD( scratch[7],scratch[1],scratch[4]);
+        C_SUB( scratch[10],scratch[1],scratch[4]);
+        C_ADD( scratch[8],scratch[2],scratch[3]);
+        C_SUB( scratch[9],scratch[2],scratch[3]);
+
+        Fout0->r += scratch[7].r + scratch[8].r;
+        Fout0->i += scratch[7].i + scratch[8].i;
+
+        scratch[5].r = scratch[0].r + S_MUL(scratch[7].r,ya.r) + S_MUL(scratch[8].r,yb.r);
+        scratch[5].i = scratch[0].i + S_MUL(scratch[7].i,ya.r) + S_MUL(scratch[8].i,yb.r);
+
+        scratch[6].r =  S_MUL(scratch[10].i,ya.i) + S_MUL(scratch[9].i,yb.i);
+        scratch[6].i = -S_MUL(scratch[10].r,ya.i) - S_MUL(scratch[9].r,yb.i);
+
+        C_SUB(*Fout1,scratch[5],scratch[6]);
+        C_ADD(*Fout4,scratch[5],scratch[6]);
+
+        scratch[11].r = scratch[0].r + S_MUL(scratch[7].r,yb.r) + S_MUL(scratch[8].r,ya.r);
+        scratch[11].i = scratch[0].i + S_MUL(scratch[7].i,yb.r) + S_MUL(scratch[8].i,ya.r);
+        scratch[12].r = - S_MUL(scratch[10].i,yb.i) + S_MUL(scratch[9].i,ya.i);
+        scratch[12].i = S_MUL(scratch[10].r,yb.i) - S_MUL(scratch[9].r,ya.i);
+
+        C_ADD(*Fout2,scratch[11],scratch[12]);
+        C_SUB(*Fout3,scratch[11],scratch[12]);
+
+        ++Fout0;++Fout1;++Fout2;++Fout3;++Fout4;
+    }
+}
+
+/* perform the butterfly for one stage of a mixed radix FFT */
+static void kf_bfly_generic(
+        kiss_fft_cpx * Fout,
+        const size_t fstride,
+        const kiss_fft_cfg st,
+        int m,
+        int p
+        )
+{
+    int u,k,q1,q;
+    kiss_fft_cpx * twiddles = st->twiddles;
+    kiss_fft_cpx t;
+    int Norig = st->nfft;
+
+    kiss_fft_cpx * scratch = (kiss_fft_cpx*)KISS_FFT_TMP_ALLOC(sizeof(kiss_fft_cpx)*p);
+
+    for ( u=0; u<m; ++u ) {
+        k=u;
+        for ( q1=0 ; q1<p ; ++q1 ) {
+            scratch[q1] = Fout[ k  ];
+            C_FIXDIV(scratch[q1],p);
+            k += m;
+        }
+
+        k=u;
+        for ( q1=0 ; q1<p ; ++q1 ) {
+            int twidx=0;
+            Fout[ k ] = scratch[0];
+            for (q=1;q<p;++q ) {
+                twidx += fstride * k;
+                if (twidx>=Norig) twidx-=Norig;
+                C_MUL(t,scratch[q] , twiddles[twidx] );
+                C_ADDTO( Fout[ k ] ,t);
+            }
+            k += m;
+        }
+    }
+    KISS_FFT_TMP_FREE(scratch);
+}
+
+static
+void kf_work(
+        kiss_fft_cpx * Fout,
+        const kiss_fft_cpx * f,
+        const size_t fstride,
+        int in_stride,
+        int * factors,
+        const kiss_fft_cfg st
+        )
+{
+    kiss_fft_cpx * Fout_beg=Fout;
+    const int p=*factors++; /* the radix  */
+    const int m=*factors++; /* stage's fft length/p */
+    const kiss_fft_cpx * Fout_end = Fout + p*m;
+
+#ifdef _OPENMP
+    // use openmp extensions at the 
+    // top-level (not recursive)
+    if (fstride==1 && p<=5)
+    {
+        int k;
+
+        // execute the p different work units in different threads
+#       pragma omp parallel for
+        for (k=0;k<p;++k) 
+            kf_work( Fout +k*m, f+ fstride*in_stride*k,fstride*p,in_stride,factors,st);
+        // all threads have joined by this point
+
+        switch (p) {
+            case 2: kf_bfly2(Fout,fstride,st,m); break;
+            case 3: kf_bfly3(Fout,fstride,st,m); break; 
+            case 4: kf_bfly4(Fout,fstride,st,m); break;
+            case 5: kf_bfly5(Fout,fstride,st,m); break; 
+            default: kf_bfly_generic(Fout,fstride,st,m,p); break;
+        }
+        return;
+    }
+#endif
+
+    if (m==1) {
+        do{
+            *Fout = *f;
+            f += fstride*in_stride;
+        }while(++Fout != Fout_end );
+    }else{
+        do{
+            // recursive call:
+            // DFT of size m*p performed by doing
+            // p instances of smaller DFTs of size m, 
+            // each one takes a decimated version of the input
+            kf_work( Fout , f, fstride*p, in_stride, factors,st);
+            f += fstride*in_stride;
+        }while( (Fout += m) != Fout_end );
+    }
+
+    Fout=Fout_beg;
+
+    // recombine the p smaller DFTs 
+    switch (p) {
+        case 2: kf_bfly2(Fout,fstride,st,m); break;
+        case 3: kf_bfly3(Fout,fstride,st,m); break; 
+        case 4: kf_bfly4(Fout,fstride,st,m); break;
+        case 5: kf_bfly5(Fout,fstride,st,m); break; 
+        default: kf_bfly_generic(Fout,fstride,st,m,p); break;
+    }
+}
+
+/*  facbuf is populated by p1,m1,p2,m2, ...
+    where 
+    p[i] * m[i] = m[i-1]
+    m0 = n                  */
+static 
+void kf_factor(int n,int * facbuf)
+{
+    int p=4;
+    double floor_sqrt;
+    floor_sqrt = floor( sqrt((double)n) );
+
+    /*factor out powers of 4, powers of 2, then any remaining primes */
+    do {
+        while (n % p) {
+            switch (p) {
+                case 4: p = 2; break;
+                case 2: p = 3; break;
+                default: p += 2; break;
+            }
+            if (p > floor_sqrt)
+                p = n;          /* no more factors, skip to end */
+        }
+        n /= p;
+        *facbuf++ = p;
+        *facbuf++ = n;
+    } while (n > 1);
+}
+
+/*
+ *
+ * User-callable function to allocate all necessary storage space for the fft.
+ *
+ * The return value is a contiguous block of memory, allocated with malloc.  As such,
+ * It can be freed with free(), rather than a kiss_fft-specific function.
+ * */
+kiss_fft_cfg kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem )
+{
+    kiss_fft_cfg st=NULL;
+    size_t memneeded = sizeof(struct kiss_fft_state)
+        + sizeof(kiss_fft_cpx)*(nfft-1); /* twiddle factors*/
+
+    if ( lenmem==NULL ) {
+        st = ( kiss_fft_cfg)KISS_FFT_MALLOC( memneeded );
+    }else{
+        if (mem != NULL && *lenmem >= memneeded)
+            st = (kiss_fft_cfg)mem;
+        *lenmem = memneeded;
+    }
+    if (st) {
+        int i;
+        st->nfft=nfft;
+        st->inverse = inverse_fft;
+
+        for (i=0;i<nfft;++i) {
+            const double pi=3.141592653589793238462643383279502884197169399375105820974944;
+            double phase = -2*pi*i / nfft;
+            if (st->inverse)
+                phase *= -1;
+            kf_cexp(st->twiddles+i, phase );
+        }
+
+        kf_factor(nfft,st->factors);
+    }
+    return st;
+}
+
+
+void kiss_fft_stride(kiss_fft_cfg st,const kiss_fft_cpx *fin,kiss_fft_cpx *fout,int in_stride)
+{
+    if (fin == fout) {
+        //NOTE: this is not really an in-place FFT algorithm.
+        //It just performs an out-of-place FFT into a temp buffer
+        kiss_fft_cpx * tmpbuf = (kiss_fft_cpx*)KISS_FFT_TMP_ALLOC( sizeof(kiss_fft_cpx)*st->nfft);
+        kf_work(tmpbuf,fin,1,in_stride, st->factors,st);
+        memcpy(fout,tmpbuf,sizeof(kiss_fft_cpx)*st->nfft);
+        KISS_FFT_TMP_FREE(tmpbuf);
+    }else{
+        kf_work( fout, fin, 1,in_stride, st->factors,st );
+    }
+}
+
+void kiss_fft(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout)
+{
+    kiss_fft_stride(cfg,fin,fout,1);
+}
+
+
+void kiss_fft_cleanup(void)
+{
+    // nothing needed any more
+}
+
+int kiss_fft_next_fast_size(int n)
+{
+    while(1) {
+        int m=n;
+        while ( (m%2) == 0 ) m/=2;
+        while ( (m%3) == 0 ) m/=3;
+        while ( (m%5) == 0 ) m/=5;
+        if (m<=1)
+            break; /* n is completely factorable by twos, threes, and fives */
+        n++;
+    }
+    return n;
+}
--- a/kiss_fft.h
+++ b/kiss_fft.h
@ -0,0 +1,124 @@
+#ifndef KISS_FFT_H
+#define KISS_FFT_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ ATTENTION!
+ If you would like a :
+ -- a utility that will handle the caching of fft objects
+ -- real-only (no imaginary time component ) FFT
+ -- a multi-dimensional FFT
+ -- a command-line utility to perform ffts
+ -- a command-line utility to perform fast-convolution filtering
+
+ Then see kfc.h kiss_fftr.h kiss_fftnd.h fftutil.c kiss_fastfir.c
+  in the tools/ directory.
+*/
+
+#ifdef USE_SIMD
+# include <xmmintrin.h>
+# define kiss_fft_scalar __m128
+#define KISS_FFT_MALLOC(nbytes) _mm_malloc(nbytes,16)
+#define KISS_FFT_FREE _mm_free
+#else	
+#define KISS_FFT_MALLOC malloc
+#define KISS_FFT_FREE free
+#endif	
+
+
+#ifdef FIXED_POINT
+#include <sys/types.h>	
+# if (FIXED_POINT == 32)
+#  define kiss_fft_scalar int32_t
+# else	
+#  define kiss_fft_scalar int16_t
+# endif
+#else
+# ifndef kiss_fft_scalar
+/*  default is float */
+#   define kiss_fft_scalar float
+# endif
+#endif
+
+typedef struct {
+    kiss_fft_scalar r;
+    kiss_fft_scalar i;
+}kiss_fft_cpx;
+
+typedef struct kiss_fft_state* kiss_fft_cfg;
+
+/* 
+ *  kiss_fft_alloc
+ *  
+ *  Initialize a FFT (or IFFT) algorithm's cfg/state buffer.
+ *
+ *  typical usage:      kiss_fft_cfg mycfg=kiss_fft_alloc(1024,0,NULL,NULL);
+ *
+ *  The return value from fft_alloc is a cfg buffer used internally
+ *  by the fft routine or NULL.
+ *
+ *  If lenmem is NULL, then kiss_fft_alloc will allocate a cfg buffer using malloc.
+ *  The returned value should be free()d when done to avoid memory leaks.
+ *  
+ *  The state can be placed in a user supplied buffer 'mem':
+ *  If lenmem is not NULL and mem is not NULL and *lenmem is large enough,
+ *      then the function places the cfg in mem and the size used in *lenmem
+ *      and returns mem.
+ *  
+ *  If lenmem is not NULL and ( mem is NULL or *lenmem is not large enough),
+ *      then the function returns NULL and places the minimum cfg 
+ *      buffer size in *lenmem.
+ * */
+
+kiss_fft_cfg kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem); 
+
+/*
+ * kiss_fft(cfg,in_out_buf)
+ *
+ * Perform an FFT on a complex input buffer.
+ * for a forward FFT,
+ * fin should be  f[0] , f[1] , ... ,f[nfft-1]
+ * fout will be   F[0] , F[1] , ... ,F[nfft-1]
+ * Note that each element is complex and can be accessed like
+    f[k].r and f[k].i
+ * */
+void kiss_fft(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout);
+
+/*
+ A more generic version of the above function. It reads its input from every Nth sample.
+ * */
+void kiss_fft_stride(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout,int fin_stride);
+
+/* If kiss_fft_alloc allocated a buffer, it is one contiguous 
+   buffer and can be simply free()d when no longer needed*/
+#define kiss_fft_free free
+
+/*
+ Cleans up some memory that gets managed internally. Not necessary to call, but it might clean up 
+ your compiler output to call this before you exit.
+*/
+void kiss_fft_cleanup(void);
+	
+
+/*
+ * Returns the smallest integer k, such that k>=n and k has only "fast" factors (2,3,5)
+ */
+int kiss_fft_next_fast_size(int n);
+
+/* for real ffts, we need an even size */
+#define kiss_fftr_next_fast_size_real(n) \
+        (kiss_fft_next_fast_size( ((n)+1)>>1)<<1)
+
+#ifdef __cplusplus
+} 
+#endif
+
+#endif
--- a/main.c
+++ b/main.c
@ -1,3 +1,4 @@
+
 /*
 * ECE 3849 Lab2 starter project
 *
@ -30,21 +31,45 @@
 #include "driverlib/pin_map.h"
 #include "sampling.h"
 #include "buttons.h"
-#define PWM_FREQUENCY 20000 // PWM frequency = 20 kHz
+#include "frequency.h"
+#include "kiss_fft.h"
+#include "_kiss_fft_guts.h"

-uint32_t gSystemClock = 120000000; // [Hz] system clock frequency
+
+
+#define PI 3.14159265358979f

 tContext sContext;

 uint32_t cputime_unloaded;

+#define FFT_EN false
+
 #define LOCAL_BUF_LEN 128
 uint16_t adc_buffer_sample[LOCAL_BUF_LEN]; // copy of g adc buffer
 uint8_t adc_buffer_processed[LOCAL_BUF_LEN]; // copy of g adc buffer

-uint8_t voltage_scale = 4; // 2v
-uint8_t time_scale = 5; // 20us
-uint8_t trigger_mode = 1; // rising
+#define FFT_BUF_LEN 1024
+uint16_t adc_buffer_fft_sample[FFT_BUF_LEN]; // copy of g adc buffer
+uint8_t adc_buffer_fft_processed[FFT_BUF_LEN]; // copy of g adc buffer
+
+kiss_fft_cfg cfg;
+static kiss_fft_cpx in[FFT_BUF_LEN], out[FFT_BUF_LEN];
+
+typedef struct
+{
+    bool fft;
+    uint8_t voltage_scale;
+    uint8_t time_scale;
+    uint8_t trigger_mode;
+} Options;
+
+Options options = {
+   .fft = false, // oscilloscope mode
+   .voltage_scale = 4, // 2v
+   .time_scale = 5, // 20us
+   .trigger_mode = 1, // rising
+};

 // assuming square lcd
 #define HEIGHT LCD_VERTICAL_MAX
@ -53,7 +78,7 @@ uint8_t trigger_mode = 1; // rising

 #define VIN_RANGE 3.3 // volts
 #define ADC_BITS 12
-#define ADC_OFFSET 30
+#define ADC_OFFSET 100

 #define VOLTAGE_SCALES 5
 const char * const gVoltageScaleStr[VOLTAGE_SCALES] = {
@ -64,43 +89,9 @@ const float gVoltageScale[VOLTAGE_SCALES] = {
    0.1, 0.2, 0.5, 1., 2.
 };

-#define TIME_SCALES 6
-const char * const gTimeScaleStr[TIME_SCALES] = {
-"100 ms", "50 ms", "20 ms", " 10 ms", "50 us", "20 us"
-};
-
-const uint64_t gTImeScale[TIME_SCALES] = {
-    100 * 1000 / PIXELS_PER_DIV,
-    50 * 1000 / PIXELS_PER_DIV,
-    20 * 1000 / PIXELS_PER_DIV,
-    10 * 1000 / PIXELS_PER_DIV,
-    50 / PIXELS_PER_DIV,
-    20 / PIXELS_PER_DIV,
-};
-
 int Trigger(bool rising);

-// start a pwm test signal
-void start_signal() {
-  // configure M0PWM2, at GPIO PF2, BoosterPack 1 header C1 pin 2
-  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
-  GPIOPinTypePWM(GPIO_PORTF_BASE, GPIO_PIN_2);
-  GPIOPinConfigure(GPIO_PF2_M0PWM2);
-  GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_STRENGTH_2MA,
-                   GPIO_PIN_TYPE_STD);
-  // configure the PWM0 peripheral, gen 1, outputs 2 and 3
-  SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);
-  // use system clock without division
-  PWMClockSet(PWM0_BASE, PWM_SYSCLK_DIV_1);
-  PWMGenConfigure(PWM0_BASE, PWM_GEN_1,
-                  PWM_GEN_MODE_DOWN | PWM_GEN_MODE_NO_SYNC);
-  PWMGenPeriodSet(PWM0_BASE, PWM_GEN_1,
-                  roundf((float)gSystemClock / PWM_FREQUENCY));
-  PWMPulseWidthSet(PWM0_BASE, PWM_OUT_2,
-                   roundf((float)gSystemClock / PWM_FREQUENCY * 0.4f));
-  PWMOutputState(PWM0_BASE, PWM_OUT_2_BIT, true);
-  PWMGenEnable(PWM0_BASE, PWM_GEN_1);
-}
+

 uint32_t cpu_load_count(void)
 {
@ -134,6 +125,7 @@ int main(void)
    start_sampler();
    ButtonInit();
    start_cputimer();
+    start_frequency_scan();

    Crystalfontz128x128_Init(); // Initialize the LCD display driver
    Crystalfontz128x128_SetOrientation(LCD_ORIENTATION_UP); // set screen orientation
@ -141,21 +133,17 @@ int main(void)
    GrContextInit(&sContext, &g_sCrystalfontz128x128); // Initialize the grlib graphics context
    GrContextFontSet(&sContext, &g_sFontFixed6x8); // select font

+    #define KISS_FFT_CFG_SIZE (sizeof(struct kiss_fft_state)+sizeof(kiss_fft_cpx)*(FFT_BUF_LEN-1))
+    static char kiss_fft_cfg_buffer[KISS_FFT_CFG_SIZE];
+    size_t buffer_size = KISS_FFT_CFG_SIZE;
+    cfg = kiss_fft_alloc(FFT_BUF_LEN, 0, kiss_fft_cfg_buffer, &buffer_size);
+
    /* Start BIOS */
    BIOS_start();

    return (0);
 }

-void task0_func(UArg arg1, UArg arg2)
-{
-    IntMasterEnable();
-
-    while (true) {
-        // do nothing
-    }
-}
-
 void capture_waveform(UArg arg1, UArg arg2)
 {
    IntMasterEnable();
@ -163,37 +151,77 @@ void capture_waveform(UArg arg1, UArg arg2)
        Semaphore_pend(capture_sem, BIOS_WAIT_FOREVER);

        int32_t adc_current_index;
-        int32_t j;
-        int trigger;
-        if (trigger_mode == 2) {
-            trigger = gADCBufferIndex - (WIDTH / 2); // show latest if trigger disabled
+        int32_t i;
+
+        if (options.fft) {
+            adc_current_index = getADCBufferIndex();
+            int32_t j = 0;
+            for(i=adc_current_index-FFT_BUF_LEN; i<adc_current_index; i++) {
+                adc_buffer_fft_sample[j++] = gADCBuffer[ADC_BUFFER_WRAP(adc_current_index + i)];
+            }
        } else {
-            trigger = Trigger(trigger_mode);
-        }
+            // single read of options is atomic
+            int32_t trigger_mode = options.trigger_mode;

-        adc_current_index = trigger - (WIDTH / 2);
-        for (j=0; j<LOCAL_BUF_LEN; j++) {
-            adc_buffer_sample[j] = gADCBuffer[ADC_BUFFER_WRAP(adc_current_index + j)];
-        }
+            int trigger;
+            if (trigger_mode == 2) {
+                trigger = getADCBufferIndex() - (WIDTH / 2); // show latest if trigger disabled
+            } else {
+                trigger = Trigger(trigger_mode);
+            }

+            adc_current_index = trigger - (WIDTH / 2);
+            for (i=0; i<LOCAL_BUF_LEN; i++) {
+                adc_buffer_sample[i] = gADCBuffer[ADC_BUFFER_WRAP(adc_current_index + i)];
+            }
+
+        }
        Semaphore_post(process_sem);
    }
 }

 void process_waveform(UArg arg1, UArg arg2) {
+    static float w[FFT_BUF_LEN];
+    int i;
+    for (i=0; i<FFT_BUF_LEN; i++) {
+        w[i] = 0.42f
+            - 0.5f * cosf(2*PI*i/(FFT_BUF_LEN-1))
+            + 0.08f * cosf(4*PI*i/(FFT_BUF_LEN-1));
+    }
    while(true) {
        Semaphore_pend(process_sem, BIOS_WAIT_FOREVER);
+        int i;

-        float fVoltsPerDiv = gVoltageScale[voltage_scale];
-        float fScale = (VIN_RANGE * PIXELS_PER_DIV)/((1 << ADC_BITS) * fVoltsPerDiv);
+        #define MIN(a,b) (((a)<(b))?(a):(b))
+        #define MAX(a,b) (((a)>(b))?(a):(b))
+        #define CONSTRAIN(x) MAX(MIN(HEIGHT - 1, x), 0)

-        int j;
-        for(j=0; j<LOCAL_BUF_LEN; j++) {
-            #define MIN(a,b) (((a)<(b))?(a):(b))
-            #define MAX(a,b) (((a)>(b))?(a):(b))
-            #define CONSTRAIN(x) MAX(MIN(HEIGHT - 1, x), 0)
-            #define TRANSPOSE(x) CONSTRAIN((HEIGHT/2) - (int)roundf(fScale * ((int)x - ADC_OFFSET)))
-            adc_buffer_processed[j] = TRANSPOSE(adc_buffer_sample[j]);
+        if(options.fft) { // fft
+            for(i=0; i<FFT_BUF_LEN; i++) {
+                //in[i].r = sinf(20*PI*i/FFT_BUF_LEN);
+                in[i].r = (float) adc_buffer_fft_sample[i] * w[i];
+                in[i].i = 0;
+            }
+
+            kiss_fft(cfg, in, out);
+
+            for(i=0; i<LOCAL_BUF_LEN; i++) {
+                #define DB(out) 10 * log10f(out.r * out.r + out.i * out.i)
+
+                //adc_buffer_processed[i] = CONSTRAIN(HEIGHT- (int)roundf(0.5 * DB(out[i])));
+                adc_buffer_processed[i] = CONSTRAIN(HEIGHT- (int) (DB(out[i])) );
+
+            }
+
+        } else {
+            // single read of global options is atomic
+            float fVoltsPerDiv = gVoltageScale[options.voltage_scale];
+            float fScale = (VIN_RANGE * PIXELS_PER_DIV)/((1 << ADC_BITS) * fVoltsPerDiv);
+
+            for(i=0; i<LOCAL_BUF_LEN; i++) {
+                #define TRANSPOSE(x) CONSTRAIN((HEIGHT/2) - (int)roundf(fScale * ((int)x - ADC_OFFSET)))
+                adc_buffer_processed[i] = TRANSPOSE(adc_buffer_sample[i]);
+            }
        }

        Semaphore_post(display_sem);
@ -204,28 +232,34 @@ void process_waveform(UArg arg1, UArg arg2) {
 void handle_user_input() {
    // handle buttons
    Button button = (Button) 0;
+    Options local_options = options; // this is the only writer
    while (true) {
        Mailbox_pend(button_mailbox, &button, BIOS_WAIT_FOREVER);

        switch (button) {
            case S1: // toggle edge
-                trigger_mode = (trigger_mode + 1) % 3;
+                local_options.trigger_mode = (local_options.trigger_mode + 1) % 3;
+                break;
+            case S2: // toggle fft
+                local_options.fft ^= 1;
                break;
            case Up: // next scale
-                voltage_scale = (voltage_scale + 1) % VOLTAGE_SCALES;
+                local_options.voltage_scale = (local_options.voltage_scale + 1) % VOLTAGE_SCALES;
                break;
            case Down: // previous scale
-                voltage_scale = (voltage_scale + VOLTAGE_SCALES - 1) % VOLTAGE_SCALES;
+                local_options.voltage_scale = (local_options.voltage_scale + VOLTAGE_SCALES - 1) % VOLTAGE_SCALES;
                break;
-            case Right: // next scale
-                time_scale = (time_scale + 1) % TIME_SCALES;
-                set_frequency(gTImeScale[time_scale]);
+            case SW1:
+                set_pwm_period(++gPWMPeriod);
                break;
-            case Left: // previous scale
-                time_scale = (time_scale + TIME_SCALES - 1) % TIME_SCALES;
-                set_frequency(gTImeScale[time_scale]);
+            case SW2:
+                set_pwm_period(--gPWMPeriod);
                break;
        }
+
+        Semaphore_pend(options_sem, BIOS_WAIT_FOREVER);
+        options = local_options;
+        Semaphore_post(options_sem);
    }
 }

@ -237,6 +271,10 @@ void display_waveform(UArg arg1, UArg arg2)
    while(1) {
        Semaphore_pend(display_sem, BIOS_WAIT_FOREVER);

+        Semaphore_pend(options_sem, BIOS_WAIT_FOREVER);
+        Options local_options = options;
+        Semaphore_post(options_sem);
+
        // calculate cpu usage
        uint32_t cputime_loaded;
        cputime_loaded = cpu_load_count();
@ -261,45 +299,43 @@ void display_waveform(UArg arg1, UArg arg2)

        // info
        GrContextForegroundSet(&sContext, ClrWheat);
-        GrStringDraw(&sContext, gVoltageScaleStr[voltage_scale], /*length*/ -1, /*x*/ 0, /*y*/ 0, /*opaque*/ false);
-        GrStringDraw(&sContext, gTimeScaleStr[time_scale], /*length*/ -1, /*x*/ 60, /*y*/ 0, /*opaque*/ false);
-        snprintf(str, sizeof(str), "CPU Load %.1f%%", usage_percent);
-        GrStringDraw(&sContext, str, /*length*/ -1, /*x*/ 0, /*y*/ HEIGHT - 10, /*opaque*/ false);

-        switch (trigger_mode) {
-            case 1:
-                GrStringDraw(&sContext, "^", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
-                break;
-            case 0:
-                GrStringDraw(&sContext, "v", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
-                break;
-            case 2:
-                GrStringDraw(&sContext, "-", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
-                break;
+        snprintf(str, sizeof(str), "CPU Load %.1f%%", usage_percent);
+        GrStringDraw(&sContext, str, /*length*/ -1, /*x*/ 0, /*y*/ HEIGHT - 30, /*opaque*/ false);
+
+        uint32_t period = gPeriod;
+        float frequency = (float) gSystemClock / (float) period;
+        snprintf(str, sizeof(str), "f = %.1fhz", frequency);
+        GrStringDraw(&sContext, str, /*length*/ -1, /*x*/ 0, /*y*/ HEIGHT - 10, /*opaque*/ false);
+        snprintf(str, sizeof(str), "T = %dc", period);
+        GrStringDraw(&sContext, str, /*length*/ -1, /*x*/ 0, /*y*/ HEIGHT - 20, /*opaque*/ false);
+
+
+        if (local_options.fft) {
+            GrStringDraw(&sContext, "20 dB" , /*length*/ -1, /*x*/ 0, /*y*/ 0, /*opaque*/ false);
+
+        } else {
+            GrStringDraw(&sContext, gVoltageScaleStr[local_options.voltage_scale], /*length*/ -1, /*x*/ 0, /*y*/ 0, /*opaque*/ false);
+
+            switch (local_options.trigger_mode) {
+                case 1:
+                    GrStringDraw(&sContext, "^", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
+                    break;
+                case 0:
+                    GrStringDraw(&sContext, "v", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
+                    break;
+                case 2:
+                    GrStringDraw(&sContext, "-", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
+                    break;
+          }
        }

+
        // display graph
        GrContextForegroundSet(&sContext, ClrYellow);
        int j;
-        for(j=0; j<LOCAL_BUF_LEN; j++) {
-            #define MIN(a,b) (((a)<(b))?(a):(b))
-            #define MAX(a,b) (((a)>(b))?(a):(b))
-            uint32_t upper,lower, current, last;
-
-            if (j==0) {
-                upper = adc_buffer_processed[j];
-                lower = upper;
-                last = upper;
-            } else {
-                current = adc_buffer_processed[j];
-
-                upper = MAX(current, last);
-                lower = MIN(current, last);
-
-                last = current;
-            }
-
-            GrLineDrawV(&sContext, j, lower, upper);
+        for(j=1; j<LOCAL_BUF_LEN; j++) {
+            GrLineDraw(&sContext, j-1, adc_buffer_processed[j-1], j, adc_buffer_processed[j]);
        }

        GrFlush(&sContext); // flush the frame buffer to the LCD
@ -310,7 +346,7 @@ void display_waveform(UArg arg1, UArg arg2)

 int Trigger(bool rising) // search for edge trigger
 {
-    int x = gADCBufferIndex - (WIDTH / 2); // half screen width
+    int x = getADCBufferIndex() - (WIDTH / 2); // half screen width
    int x_stop = x - ADC_BUFFER_SIZE/2;
    for (; x > x_stop; x--) {
        if (rising) {
@ -326,6 +362,6 @@ int Trigger(bool rising) // search for edge trigger
        }
    }
    if (x == x_stop) // for loop ran to the end
-    x = gADCBufferIndex - (WIDTH / 2); // reset x back to how it was initialized
+    x = getADCBufferIndex() - (WIDTH / 2); // reset x back to how it was initialized
    return x;
 }
--- a/rtos.cfg
+++ b/rtos.cfg
@ -36,6 +36,7 @@
 var Clock = xdc.useModule('ti.sysbios.knl.Clock');
 var Mailbox = xdc.useModule('ti.sysbios.knl.Mailbox');
 var TimestampProvider = xdc.useModule('ti.sysbios.family.arm.lm4.TimestampProvider');
+var GateHwi = xdc.useModule('ti.sysbios.gates.GateHwi');
 /*
 * Default value is family dependent. For example, Linux systems often only
 * support a minimum period of 10000 us and multiples of 10000 us.
@ -534,15 +535,11 @@ var driversConfig = xdc.useModule('ti.drivers.Config');
 *      Use TI-RTOS drivers library for debugging with asserts and logs enabled.
 */
 driversConfig.libType = driversConfig.LibType_NonInstrumented;
-Clock.timerId = 0;
+Clock.timerId = 2;
 TimestampProvider.useClockTimer = true;
-var task0Params = new Task.Params();
-task0Params.instance.name = "task0";
-task0Params.priority = 1;
-Program.global.task0 = Task.create("&task0_func", task0Params);
 var m3Hwi0Params = new m3Hwi.Params();
 m3Hwi0Params.instance.name = "m3Hwi0";
-m3Hwi0Params.priority = 0;
+m3Hwi0Params.priority = 64;
 Program.global.m3Hwi0 = m3Hwi.create(62, "&ADC_ISR", m3Hwi0Params);
 var task1Params = new Task.Params();
 task1Params.instance.name = "waveform";
@ -593,3 +590,14 @@ var task5Params = new Task.Params();
 task5Params.instance.name = "user_input";
 task5Params.priority = 6;
 Program.global.user_input = Task.create("&handle_user_input", task5Params);
+var semaphore4Params = new Semaphore.Params();
+semaphore4Params.instance.name = "options_sem";
+semaphore4Params.mode = Semaphore.Mode_BINARY;
+Program.global.options_sem = Semaphore.create(1, semaphore4Params);
+var gateHwi0Params = new GateHwi.Params();
+gateHwi0Params.instance.name = "gateHwiDMA";
+Program.global.gateHwi0 = GateHwi.create(gateHwi0Params);
+var m3Hwi1Params = new m3Hwi.Params();
+m3Hwi1Params.instance.name = "m3Hwi1";
+m3Hwi1Params.priority = 4;
+Program.global.m3Hwi1 = m3Hwi.create(35, "&capture_handler", m3Hwi1Params);
--- a/sampling.c
+++ b/sampling.c
@ -7,37 +7,111 @@
 #include "driverlib/sysctl.h"
 #include "driverlib/interrupt.h"
 #include "driverlib/timer.h"
+#include "driverlib/udma.h"
 #include "sysctl_pll.h"
 #include "inc/hw_types.h"
 #include "inc/hw_memmap.h"
 #include <math.h>
 #include "buttons.h"
 #include "sampling.h"
+#include <xdc/std.h>
+#include <xdc/runtime/System.h>
+#include <xdc/cfg/global.h>
+#include <ti/sysbios/gates/GateHwi.h>
+
+
+#define DMA
+
+#ifdef DMA
+#pragma DATA_ALIGN(gDMAControlTable, 1024)
+tDMAControlTable gDMAControlTable[64]; // uDMA control table
+#endif

 extern uint32_t gSystemClock;   // [Hz] system clock frequency

-// latest sample index
-void ADC_ISR(void)
+// is DMA occurring in the primary channel?
+volatile bool gDMAPrimary = true;
+void ADC_ISR(void) // DMA
 {
-    // clear ADC1 sequence0 interrupt flag in the ADCISC register
-    //HWREGBITW(ADC1_ISC_R, 1) = 1;
-    ADC1_ISC_R |= 1;
-
-    // check for ADC FIFO overflow
-    if(ADC1_OSTAT_R & ADC_OSTAT_OV0) {
-    gADCErrors++; // count errors
-    ADC1_OSTAT_R = ADC_OSTAT_OV0; // clear overflow condition
+    ADCIntClearEx(ADC1_BASE, ADC_INT_DMA_SS0); // clear the ADC1 sequence 0 DMA interrupt flag
+    // Check the primary DMA channel for end of transfer, and
+    // restart if needed.
+    if (uDMAChannelModeGet(UDMA_SEC_CHANNEL_ADC10 | UDMA_PRI_SELECT) ==
+        UDMA_MODE_STOP) {
+        // restart the primary channel (same as setup)
+        uDMAChannelTransferSet(UDMA_SEC_CHANNEL_ADC10 | UDMA_PRI_SELECT,
+            UDMA_MODE_PINGPONG, (void*)&ADC1_SSFIFO0_R,
+            (void*)&gADCBuffer[0], ADC_BUFFER_SIZE/2);
+        // DMA is currently occurring in the alternate buffer
+        gDMAPrimary = false;
+    }
+    // Check the alternate DMA channel for end of transfer, and
+    // restart if needed.
+    // Also set the gDMAPrimary global.
+    if (uDMAChannelModeGet(UDMA_SEC_CHANNEL_ADC10 | UDMA_ALT_SELECT) ==
+        UDMA_MODE_STOP) {
+        // restart the primary channel (same as setup)
+        uDMAChannelTransferSet(UDMA_SEC_CHANNEL_ADC10 | UDMA_ALT_SELECT,
+             UDMA_MODE_PINGPONG, (void*)&ADC1_SSFIFO0_R,
+            (void*)&gADCBuffer[ADC_BUFFER_SIZE/2],
+            ADC_BUFFER_SIZE/2);
+        // DMA is currently occurring in the primary buffer
+        gDMAPrimary = true;
+    }
+    // The DMA channel may be disabled if the CPU is paused by the debugger
+    if (!uDMAChannelIsEnabled(UDMA_SEC_CHANNEL_ADC10)) {
+        // re-enable the DMA channel
+        uDMAChannelEnable(UDMA_SEC_CHANNEL_ADC10);
    }
-    gADCBufferIndex = ADC_BUFFER_WRAP(gADCBufferIndex + 1);
-    // read sample from the ADC1 sequence 0 FIFO
-    gADCBuffer[gADCBufferIndex] = (ADC1_SSFIFO0_R & ADC_SSFIFO0_DATA_M);
 }

+int32_t getADCBufferIndex(void)
+{
+    int32_t index;
+    uint32_t key = GateHwi_enter(gateHwi0);
+    if (gDMAPrimary) { // DMA is currently in the primary channel
+        index = ADC_BUFFER_SIZE/2 - 1 -
+        uDMAChannelSizeGet(UDMA_SEC_CHANNEL_ADC10 |
+        UDMA_PRI_SELECT);
+    } else { // DMA is currently in the alternate channel
+        index = ADC_BUFFER_SIZE - 1 -
+        uDMAChannelSizeGet(UDMA_SEC_CHANNEL_ADC10 |
+        UDMA_ALT_SELECT);
+    }
+    GateHwi_leave(gateHwi0, key);
+
+    return index;
+}

 void start_sampler() {
    gADCBufferIndex = ADC_BUFFER_SIZE - 1;
    gADCErrors = 0;

+    // init DMA
+    SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
+    uDMAEnable();
+    uDMAControlBaseSet(gDMAControlTable);
+    // assign DMA channel 24 to ADC1 sequence 0
+    uDMAChannelAssign(UDMA_CH24_ADC1_0);
+    uDMAChannelAttributeDisable(UDMA_SEC_CHANNEL_ADC10, UDMA_ATTR_ALL);
+    // primary DMA channel = first half of the ADC buffer
+    uDMAChannelControlSet(UDMA_SEC_CHANNEL_ADC10 | UDMA_PRI_SELECT,
+     UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 |
+    UDMA_ARB_4);
+    uDMAChannelTransferSet(UDMA_SEC_CHANNEL_ADC10 | UDMA_PRI_SELECT,
+     UDMA_MODE_PINGPONG, (void*)&ADC1_SSFIFO0_R,
+    (void*)&gADCBuffer[0], ADC_BUFFER_SIZE/2);
+    // alternate DMA channel = second half of the ADC buffer
+    uDMAChannelControlSet(UDMA_SEC_CHANNEL_ADC10 | UDMA_ALT_SELECT,
+     UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 |
+    UDMA_ARB_4);
+    uDMAChannelTransferSet(UDMA_SEC_CHANNEL_ADC10 | UDMA_ALT_SELECT,
+     UDMA_MODE_PINGPONG, (void*)&ADC1_SSFIFO0_R,
+    (void*)&gADCBuffer[ADC_BUFFER_SIZE/2],
+    ADC_BUFFER_SIZE/2);
+    uDMAChannelEnable(UDMA_SEC_CHANNEL_ADC10);
+
+
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
    GPIOPinTypeADC(GPIO_PORTE_BASE,
                    GPIO_PIN_0); // GPIO setup for analog input AIN3
@ -45,8 +119,6 @@ void start_sampler() {
    SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
    SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC1);

-    // timer for low-speed
-    SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER2);
    // ADC clock
    uint32_t pll_frequency = SysCtlFrequencyGet(CRYSTAL_FREQUENCY);
    uint32_t pll_divisor =
@ -64,28 +136,10 @@ void start_sampler() {
    ADCSequenceStepConfigure(ADC1_BASE, 0, 0, ADC_CTL_CH3 | ADC_CTL_END | ADC_CTL_IE);
    // enable the sequence. it is now sampling
    ADCSequenceEnable(ADC1_BASE, 0);
+
    // enable sequence 0 interrupt in the ADC1 peripheral
-    ADCIntEnable(ADC1_BASE, 0); // INT_ADC1SS0
-}
-
-void set_frequency(uint64_t microseconds) {
-    if (microseconds == 1) {
-        ADCSequenceDisable(ADC1_BASE, 0);
-        // don't use a timer for high speed
-        ADCSequenceConfigure(ADC1_BASE, 0, ADC_TRIGGER_ALWAYS, 0);
-        ADCSequenceEnable(ADC1_BASE, 0);
-        return;
-    }
-
-    // initialize timer 2 in periodic mode
-    TimerDisable(TIMER2_BASE, TIMER_BOTH);
-    TimerConfigure(TIMER2_BASE, TIMER_CFG_PERIODIC);
-    #define MICROSECONDS_PER_SECOND 1000000
-    TimerLoadSet(TIMER2_BASE, TIMER_A, (uint32_t) ((uint64_t) gSystemClock * microseconds / MICROSECONDS_PER_SECOND) - 1);
-    TimerControlTrigger(TIMER2_BASE, TIMER_A, true);
-    TimerEnable(TIMER2_BASE, TIMER_A);
-
-    ADCSequenceDisable(ADC1_BASE, 0);
-    ADCSequenceConfigure(ADC1_BASE, 0, ADC_TRIGGER_TIMER, 0);
-    ADCSequenceEnable(ADC1_BASE, 0);
+    //ADCIntEnable(ADC1_BASE, 0); // INT_ADC1SS0
+
+    ADCSequenceDMAEnable(ADC1_BASE, 0); // enable DMA for ADC1 sequence 0
+    ADCIntEnableEx(ADC1_BASE, ADC_INT_DMA_SS0); // enable ADC1 sequence 0 DMA interrupt
 }
--- a/sampling.h
+++ b/sampling.h
@ -17,4 +17,6 @@ void start_sampler(void);

 void set_frequency(uint64_t microseconds);

+int32_t getADCBufferIndex(void);
+
 #endif /* SAMPLING_H_ */
--- a/src/makefile.libs
+++ b/src/makefile.libs
@ -1,6 +1,6 @@
 #
 # This file was generated based on the configuration script:
-#     C:\Users\askillorin\Downloads\ECE3849-tirtos\ece3849_lab3_starter\rtos.cfg
+#     C:\Users\askillorin\Documents\ece3849_lab3_starter\rtos.cfg
 #
 # This makefile may be included in other makefiles that need to build
 # the libraries containing the compiled source files generated as
@ -14,7 +14,7 @@
 #
 # The absolute path to the generated source directory (at the time the
 # sources were generated) is:
-#    C:\Users\askillorin\Downloads\ECE3849-tirtos\ece3849_lab3_starter\src
+#    C:\Users\askillorin\Documents\ece3849_lab3_starter\src
 #
 GEN_SRC_DIR ?= ../src

--- a/src/sysbios/BIOS.obj
+++ b/src/sysbios/BIOS.obj
--- a/src/sysbios/m3_Hwi_asm.obj
+++ b/src/sysbios/m3_Hwi_asm.obj
--- a/src/sysbios/m3_Hwi_asm_switch.obj
+++ b/src/sysbios/m3_Hwi_asm_switch.obj
--- a/src/sysbios/m3_IntrinsicsSupport_asm.obj
+++ b/src/sysbios/m3_IntrinsicsSupport_asm.obj
--- a/src/sysbios/m3_TaskSupport_asm.obj
+++ b/src/sysbios/m3_TaskSupport_asm.obj
--- a/src/sysbios/makefile
+++ b/src/sysbios/makefile
@ -16,7 +16,7 @@ BIOS_INC  = -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/pa

 TARGET_INC = -I"C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_02_31/packages/"

-INCS = $(BIOS_INC) $(TARGET_INC)  --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Downloads/ECE3849-tirtos/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" 
+INCS = $(BIOS_INC) $(TARGET_INC)  --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/Users/askillorin/Documents/ece3849_lab3_starter" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/TivaWare_C_Series-2.1.1.71b" --include_path="C:/ti/ccs1271/tirtos_tivac_2_16_01_14/products/bios_6_45_01_29/packages/ti/sysbios/posix" --include_path="C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include" 

 CC = C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/bin/armcl -c $(CCOPTS) -I C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include
 ASM = C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/bin/armcl -c $(CCOPTS) -I C:/ti/ccs1271/ccs/tools/compiler/ti-cgt-arm_20.2.7.LTS/include
--- a/src/sysbios/sysbios.aem4f
+++ b/src/sysbios/sysbios.aem4f
Author	SHA1	Message	Date
Killorin	081baecac9	change PWM period with buttons	2025-04-24 12:07:27 -04:00
Killorin	1a1d72be7e	added frequency display	2025-04-24 11:52:52 -04:00
Killorin	ad661c5c03	second PWM output on PF3	2025-04-24 11:19:50 -04:00
Killorin	92e1128e5a	hide voltage scale in FFT mode	2025-04-24 11:11:11 -04:00
Killorin	f798fd6d03	remove dynamic sample speed change	2025-04-24 10:55:49 -04:00
Killorin	15a478c9aa	Switched to DMA 84% load with 1Msps no DMA 2.4% load with 2Msps with DMA	2025-04-24 10:40:44 -04:00
Killorin	bd79be6eac	toggle fft	2025-04-17 12:59:20 -04:00
Killorin	d3abffa13d	fix fft cast in high priority task was causing data issues + buffer overflow causing crazy issues	2025-04-17 12:53:51 -04:00
Killorin	22a3b5e795	fft (incomplete)	2025-04-17 12:32:11 -04:00
Killorin	264fc2c4ec	vendored kiss_fft	2025-04-17 11:08:46 -04:00
Killorin	d4f1ef17b9	keep options behind a semaphore	2025-04-17 10:51:51 -04:00