Added ability to toggle heartbeat LED

heartbeat_task.c

@@ -9,18 +9,41 @@
 /* TI-RTOS drivers */
 #include <ti/drivers/GPIO.h>
 
+#include <stdbool.h>
+
 /* Board Header file */
 #include "Board.h"
 
+bool LED_ENABLED = false;
+
+static void button_pressed(unsigned int index) {
+    // Toggle the LED enabled state, and disable the LED.
+    LED_ENABLED ^= true;
+    GPIO_toggle(Board_LED0);
+}
+
+/**
+ * Sets up the heart beat task, Enabling the Heartbeat LED to be toggled.
+ */
+void heartbeat_prebios(void) {
+    // Install button callback.
+    GPIO_setCallback(Board_BUTTON1, button_pressed);
+    // Enable button interrupt.
+    GPIO_enableInt(Board_BUTTON1);
+}
+
 /*
  *  ======== heartBeatFxn ========
  *  Toggle the Board_LED0. The Task_sleep is determined by arg0 which
  *  is configured for the heartBeat Task instance.
  */
 void heartBeatFxn(UArg arg0, UArg arg1) {
+    LED_ENABLED = true;
     while (1) {
         Task_sleep((UInt)arg0);
-        GPIO_toggle(Board_LED0);
+        if (LED_ENABLED) {
+            GPIO_toggle(Board_LED0);
+        }
         /*
          * Turn off the SD write LED. This way if the UART logger hasn't 
          * written data in a while, the LED will be off.

heartbeat_task.h

@@ -0,0 +1,12 @@
+#ifndef HEARTBEAT_H
+#define HEARTBEAT_H
+/**
+ * @file heartbeat_task.h
+ * Implements the heartbeat task, which simply flashes a LED on the board.
+ */
+
+/**
+ * Sets up the heart beat task, Enabling the Heartbeat LED to be toggled.
+ */
+void heartbeat_prebios(void);
+#endif

sd_card.c

@@ -65,8 +65,6 @@ void sd_setup(void) {
     }
     // Set up SPI bus.
     Board_initSDSPI();
-    // Enable GPIO.
-    Board_initGPIO();
 }
 
 /**

sd_logger.c

@@ -12,6 +12,7 @@
 /* Board Header file */
 #include "Board.h"
 
+#include "heartbeat_task.h"
 #include "sd_card.h"
 #include "uart_console_task.h"
 #include "uart_logger_task.h"
@@ -24,6 +25,9 @@ int main(void) {
     Board_initGeneral();
     Board_initUART(); // Done here since both the console and logger use it.
     uart_console_prebios();
+    // Enable the heartbeat task
+    Board_initGPIO();
+    heartbeat_prebios();
     uart_logger_prebios();
     // Setup required pthread variables for the SD card.
     sd_setup();