Add check for button direction

Author: khanning

src/boards.c

@@ -42,12 +42,16 @@
 //------------- IMPLEMENTATION -------------//
 void button_init(uint32_t pin)
 {
-  nrf_gpio_cfg_sense_input(pin, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW);
+  if (BUTTON_PULL == NRF_GPIO_PIN_PULLDOWN) {
+    nrf_gpio_cfg_sense_input(pin, BUTTON_PULL, NRF_GPIO_PIN_SENSE_HIGH);
+  } else {
+    nrf_gpio_cfg_sense_input(pin, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW);
+  }
 }
 
 bool button_pressed(uint32_t pin)
 {
-  return (nrf_gpio_pin_read(pin) == 0) ? true : false;
+  return (nrf_gpio_pin_read(pin) == BUTTON_DIR) ? true : false;
 }
 
 void board_init(void)

src/boards.h

@@ -38,6 +38,13 @@
 #ifndef BUTTON_FRESET
 #define BUTTON_FRESET   BUTTON_2
 #endif
+#ifndef BUTTON_DIR
+#if BUTTON_PULL == NRF_GPIO_PIN_PULLDOWN
+  #define BUTTON_DIR   1
+#elif BUTTON_PULL == NRF_GPIO_PIN_PULLUP
+  #define BUTTON_DIR   0
+#endif
+#endif
 
 // The primary LED is usually Red but not in all cases.
 #define LED_PRIMARY 0