Move SysTick_Handler to main.c and create LED_pulse function

Author: sandeepmistry

bootloaders/zero/board_driver_led.c

@@ -19,4 +19,24 @@
 
 #include "board_driver_led.h"
 
+volatile uint8_t ledKeepValue = 0;
+volatile uint8_t ledTargetValue = 20;
+volatile int8_t ledDirection = 1;
 
+inline void LED_pulse()
+{
+  if (ledKeepValue == 0) {
+    ledTargetValue += ledDirection;
+    LED_toggle();
+  }
+  ledKeepValue ++;
+
+  if (ledTargetValue > 240 || ledTargetValue < 10) {
+    ledDirection = -ledDirection;
+    ledTargetValue += ledDirection;
+  }
+
+  if (ledKeepValue == ledTargetValue) {
+    LED_toggle();
+  }
+}

bootloaders/zero/board_driver_led.h

@@ -27,6 +27,7 @@ inline void LED_init(void) { PORT->Group[BOARD_LED_PORT].DIRSET.reg = (1<<BOARD_
 inline void LED_on(void) { PORT->Group[BOARD_LED_PORT].OUTSET.reg = (1<<BOARD_LED_PIN); }
 inline void LED_off(void) { PORT->Group[BOARD_LED_PORT].OUTCLR.reg = (1<<BOARD_LED_PIN); }
 inline void LED_toggle(void) { PORT->Group[BOARD_LED_PORT].OUTTGL.reg = (1<<BOARD_LED_PIN); }
+void LED_pulse();
 
 inline void LEDRX_init(void) { PORT->Group[BOARD_LEDRX_PORT].DIRSET.reg = (1<<BOARD_LEDRX_PIN); }
 inline void LEDRX_on(void) { PORT->Group[BOARD_LEDRX_PORT].OUTCLR.reg = (1<<BOARD_LEDRX_PIN); }
@@ -38,6 +39,4 @@ inline void LEDTX_on(void) { PORT->Group[BOARD_LEDTX_PORT].OUTCLR.reg = (1<<BOAR
 inline void LEDTX_off(void) { PORT->Group[BOARD_LEDTX_PORT].OUTSET.reg = (1<<BOARD_LEDTX_PIN); }
 inline void LEDTX_toggle(void) { PORT->Group[BOARD_LEDTX_PORT].OUTTGL.reg = (1<<BOARD_LEDTX_PIN); }
 
-inline void LED_configure(uint32_t sampleRate) { SysTick_Config(sampleRate); }
-
 #endif // _BOARD_DRIVER_LED_

bootloaders/zero/board_startup.c

@@ -18,7 +18,6 @@
 */
 
 #include <sam.h>
-#include "board_driver_led.h"
 
 struct ConstVectors
 {
@@ -140,26 +139,3 @@ void PendSV_Handler(void)
   __BKPT(2);
   while (1);
 }
-
-volatile uint8_t keepValue = 0;
-volatile uint8_t targetValue = 20;
-volatile int8_t direction = 1;
-
-void SysTick_Handler(void)
-{
-  if (keepValue == 0) {
-    targetValue += direction;
-    LED_toggle();
-  }
-  keepValue ++;
-
-  if (targetValue > 240 || targetValue < 10) {
-    direction = -direction;
-    targetValue += direction;
-  }
-
-  if (keepValue == targetValue) {
-    LED_toggle();
-  }
-  //TC5->COUNT16.INTFLAG.bit.MC0 = 1;     // Clear interrupt
-}

bootloaders/zero/main.c

@@ -181,12 +181,14 @@ int main(void)
 
   /* Initialize LEDs */
   LED_init();
-  LED_configure(1000);
   LEDRX_init();
   LEDRX_off();
   LEDTX_init();
   LEDTX_off();
 
+  /* Start the sys tick (1 ms) */
+  SysTick_Config(1000);
+
   /* Wait for a complete enum on usb or a '#' char on serial line */
   while (1)
   {
@@ -222,3 +224,8 @@ int main(void)
 #endif
   }
 }
+
+void SysTick_Handler(void)
+{
+  LED_pulse();
+}