led driver

source/application/test/main.c

@@ -21,10 +21,17 @@ struct thread_context tc_1;
 
 void task1(void *arg)
 {
+	char rd = '0';
 	open(&led_4);
-	write(&led_4, 0, 1);
+	write(&led_4, &rd, 1);
 	while(1) {
 		sleep_ms(1000);
+		read(&led_4, &rd, 1);
+		if(rd == '0')
+			rd = '1';
+		else
+			rd = '0';
+		write(&led_4, &rd, 1);
 		write(&uart_1, "Driver test\r\n", 13);
 	}
 }