Fix #17 by initializing GPIO36 to OUTPUT LOW

MediaTek-Labs · May 24, 2017 · bf5afca · bf5afca
1 parent 762217e
commit bf5afca
Showing 1 changed file with 12 additions and 1 deletion.
diff --git a/middleware/third_party/arduino/hardware/arduino/mt7697/variants/linkit_7697/adapter_layer.c b/middleware/third_party/arduino/hardware/arduino/mt7697/variants/linkit_7697/adapter_layer.c
@@ -103,7 +103,6 @@ int __io_getchar(void)
  * For The System
  *
  */
-
 static void init_sys_clk(void)
 {
 	top_xtal_init();
@@ -121,6 +120,15 @@ static void init_sys_clk(void)
 	cmnSerialFlashClkConfTo64M();
 }
 
+static void init_usr_led(void)
+{
+	// Make sure the USR LED (GPIO36 / pin 7) is OFF 
+	// by system default.
+	hal_pinmux_set_function(HAL_GPIO_36, 8);
+	hal_gpio_set_direction(HAL_GPIO_36, HAL_GPIO_DIRECTION_OUTPUT);
+	hal_gpio_set_output(HAL_GPIO_36, 0);
+}
+
 #if 0
 LOG_CONTROL_BLOCK_DECLARE(wifi);
 LOG_CONTROL_BLOCK_DECLARE(common);
@@ -143,6 +151,9 @@ void init_system(void)
 {
 	init_sys_clk();
 
+	// ensure the USR LED is default OFF
+	init_usr_led();
+
 	/* Init the UART for stdio */
 	init_stdio();