add button read to board_test example

examples/device/board_test/src/main.c

@@ -34,45 +34,34 @@
 //--------------------------------------------------------------------+
 
 /* Blink pattern
- * - 250 ms  : device not mounted
+ * - 250 ms  : button is not pressed
- * - 1000 ms : device mounted
+ * - 1000 ms : button is pressed (and hold)
- * - 2500 ms : device is suspended
  */
 enum  {
-  BLINK_NOT_MOUNTED = 250,
+  BLINK_PRESSED = 250,
-  BLINK_MOUNTED = 1000,
+  BLINK_UNPRESSED = 1000
-  BLINK_SUSPENDED = 2500,
 };
 
-static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
-
-void led_blinking_task(void);
-
-/*------------- MAIN -------------*/
 int main(void)
 {
   board_init();
 
+  uint32_t start_ms = 0;
+  bool led_state = false;
+
   while (1)
   {
-    led_blinking_task();
+    uint32_t interval_ms = board_button_read() ? BLINK_PRESSED : BLINK_UNPRESSED;
-  }
-
-  return 0;
-}
-
-//--------------------------------------------------------------------+
-// BLINKING TASK
-//--------------------------------------------------------------------+
-void led_blinking_task(void)
-{
-  static uint32_t start_ms = 0;
-  static bool led_state = false;
 
     // Blink every interval ms
-  if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
+    if ( !(board_millis() - start_ms < interval_ms) )
-  start_ms += blink_interval_ms;
+    {
+      start_ms = board_millis();
 
       board_led_write(led_state);
       led_state = 1 - led_state; // toggle
     }
+  }
+
+  return 0;
+}

hw/bsp/lpcxpresso51u68/lpcxpresso51u68.c

@@ -53,10 +53,17 @@ void board_init(void)
   NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
 #endif
 
-  // LED
-  gpio_pin_config_t led_config = { kGPIO_DigitalOutput, 0, };
   GPIO_PortInit(GPIO, LED_PORT);
+  GPIO_PortInit(GPIO, BUTTON_PORT);
+
+  // LED
+  gpio_pin_config_t const led_config = { kGPIO_DigitalOutput, 0};
   GPIO_PinInit(GPIO, LED_PORT, LED_PIN, &led_config);
+  board_led_write(true);
+
+  // Button
+  gpio_pin_config_t const button_config = { kGPIO_DigitalInput, 0};
+  GPIO_PinInit(GPIO, BUTTON_PORT, BUTTON_PIN, &button_config);
 }
 
 //--------------------------------------------------------------------+
@@ -71,8 +78,7 @@ void board_led_write(bool state)
 uint32_t board_button_read(void)
 {
   // active low
-//  return Chip_GPIO_GetPinState(LPC_GPIO, BUTTON_PORT, BUTTON_PIN) ? 0 : 1;
+  return 1-GPIO_PinRead(GPIO, BUTTON_PORT, BUTTON_PIN);
-  return 0;
 }
 
 int board_uart_read(uint8_t* buf, int len)