add system LED definition

Change-Id: I97dc71ac00b64fdd05e0ff4c7e16e1b68b57b695

sysmoOCTSIM/atmel_start_config.atstart

@@ -1044,6 +1044,13 @@ drivers:
         configuration:
           usb_gclk_selection: Generic clock generator 1
 pads:
+  LED_system:
+    name: PC18
+    definition: Atmel:SAME54_Drivers:0.0.1::SAME54P20A-AU::pad::PC18
+    mode: Digital output
+    user_label: LED_system
+    configuration:
+      pad_initial_level: High
   PA24:
     name: PA24
     definition: Atmel:SAME54_Drivers:0.0.1::SAME54P20A-AU::pad::PA24

sysmoOCTSIM/atmel_start_pins.h

@@ -31,5 +31,6 @@
 #define PA25 GPIO(GPIO_PORTA, 25)
 #define PB24 GPIO(GPIO_PORTB, 24)
 #define PB25 GPIO(GPIO_PORTB, 25)
+#define LED_system GPIO(GPIO_PORTC, 18)
 
 #endif // ATMEL_START_PINS_H_INCLUDED

sysmoOCTSIM/driver_init.c

@@ -176,6 +176,20 @@ void system_init(void)
 {
 	init_mcu();
 
+	// GPIO on PC18
+
+	gpio_set_pin_level(LED_system,
+	                   // <y> Initial level
+	                   // <id> pad_initial_level
+	                   // <false"> Low
+	                   // <true"> High
+	                   true);
+
+	// Set pin direction to output
+	gpio_set_pin_direction(LED_system, GPIO_DIRECTION_OUT);
+
+	gpio_set_pin_function(LED_system, GPIO_PIN_FUNCTION_OFF);
+
 	UART_debug_init();
 
 	USB_DEVICE_INSTANCE_init();