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added frequency display

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Killorin 2025-04-24 11:52:52 -04:00
parent ad661c5c03
commit 1a1d72be7e
4 changed files with 60 additions and 1 deletions
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43
frequency.c Normal file
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@ -0,0 +1,43 @@
#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 "frequency.h"
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;
}

6
frequency.h Normal file
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@ -0,0 +1,6 @@
#ifndef FREQUENCY_C
#define FREQUENCY_C
void start_frequency_scan(void);
uint32_t gPeriod;
#endif

6
main.c
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@ -31,6 +31,7 @@
#include "driverlib/pin_map.h"
#include "sampling.h"
#include "buttons.h"
#include "frequency.h"
#include "kiss_fft.h"
#include "_kiss_fft_guts.h"
@ -149,6 +150,7 @@ 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
@ -318,6 +320,10 @@ void display_waveform(UArg arg1, UArg arg2)
GrContextForegroundSet(&sContext, ClrWheat);
snprintf(str, sizeof(str), "CPU Load %.1f%%", usage_percent);
GrStringDraw(&sContext, str, /*length*/ -1, /*x*/ 0, /*y*/ HEIGHT - 20, /*opaque*/ false);
float frequency = (float) gSystemClock / (float) gPeriod;
snprintf(str, sizeof(str), "f = %.1fhz", frequency);
GrStringDraw(&sContext, str, /*length*/ -1, /*x*/ 0, /*y*/ HEIGHT - 10, /*opaque*/ false);

6
rtos.cfg
View file

@ -535,7 +535,7 @@ 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 m3Hwi0Params = new m3Hwi.Params();
m3Hwi0Params.instance.name = "m3Hwi0";
@ -597,3 +597,7 @@ 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);