move pwm init after clock detection

main.c

@@ -52,16 +52,14 @@ void start_signal() {
 int main(void) {
     IntMasterDisable();
 
-    start_signal();
-
-    start_sampler();
-
     // Enable the Floating Point Unit, and permit ISRs to use it
     FPUEnable();
     FPULazyStackingEnable();
 
     // Initialize the system clock to 120 MHz
     gSystemClock = SysCtlClockFreqSet(SYSCTL_XTAL_25MHZ | SYSCTL_OSC_MAIN | SYSCTL_USE_PLL | SYSCTL_CFG_VCO_480, 120000000);
+    start_signal();
+    start_sampler();
 
     Crystalfontz128x128_Init(); // Initialize the LCD display driver
     Crystalfontz128x128_SetOrientation(LCD_ORIENTATION_UP); // set screen orientation