boards/msbiot: Added support for on-board buttons

boards/msbiot/board.c

@@ -21,7 +21,7 @@
 #include "board.h"
 #include "periph/gpio.h"
 
-static void leds_init(void);
+static void gpios_init(void);
 
 void board_init(void)
 {
@@ -29,23 +29,27 @@ void board_init(void)
     cpu_init();
 
     /* initialize the boards LEDs */
-    leds_init();
+    gpios_init();
 }
 
 /**
- * @brief Initialize the boards standard LEDs (RED, YELLOW, GREEN)
+ * @brief Initialize the on board GPIO periphs (3 LEDs, 2 buttons)
  *
- * The LED initialization is hard-coded in this function. As the LEDs are soldered
- * onto the board they are fixed to their CPU pins.
+ * The LED and button initialization is hard-coded in this function. As the LEDs
+ * and buttons are soldered onto the board they are fixed to their CPU pins.
  *
  * The LEDs are connected to the following pins:
  * - LED RED:    PB8
  * - LED YELLOW: PB14
  * - LED GREEN:  PB15
+ * - BUTTON T1:  PB13
+ * - BUTTON T2:  PA0
  */
-static void leds_init(void)
+static void gpios_init(void)
 {
     gpio_init(LED0_PIN, GPIO_OUT);
     gpio_init(LED1_PIN, GPIO_OUT);
     gpio_init(LED2_PIN, GPIO_OUT);
+    gpio_init(BUTTON0_PIN, GPIO_IN);
+    gpio_init(BUTTON1_PIN, GPIO_IN);
 }

boards/msbiot/include/board.h

@@ -72,6 +72,14 @@ extern "C" {
 #define LED2_TOGGLE         (LED_PORT->ODR  ^= LED2_MASK)
 /** @} */
 
+/**
+ * @name    Button pin definitions
+ * @{
+ */
+#define BUTTON0_PIN         GPIO_PIN(PORT_B, 13)
+#define BUTTON1_PIN         GPIO_PIN(PORT_A, 0)
+/** @} */
+
 /**
  * @brief   Initialize board specific hardware, including clock, LEDs and std-IO
  */