basic implemtation general purpose clock and tinyprintf

[cortex-from-scratch] / drivers / led.c

diff --git a/drivers/led.c b/drivers/led.c
index 0cdda5a..84c4d0a 100644 (file)
--- a/drivers/led.c
+++ b/drivers/led.c
@@ -31,17 +31,25 @@
 
 void led_init() {
 
-       regw_u8(RCC_APB2ENR, 0x1, 4, SETBIT); // enable GPIOC
-       regw_u32(GPIOC_CRL, 0x44444442, 0, OWRITE); // set PC0 pin to output mode
-       *GPIOC_ODR = 0xFFFF; // only writable in word mode
+       rsetbit(RCC_APB2ENR, 5); // enable GPIOD
+       rsetbit(RCC_APB2ENR, 2); // enable GPIOA
+
+       //rwrite(GPIOD_CRL, 0x44444644); 
+       rsetbitsfrom(GPIOD_CRL, 8, 0x6);
+       rsetbitsfrom(GPIOA_CRH, 0, 0x6);
+       rsetbit(GPIOD_ODR, 2);
+       rclrbit(GPIOA_ODR, 8);
 
 }
 
 void led_on() {
-       *GPIOC_ODR = 0x0001;
+       rsetbit(GPIOD_ODR, 2);
+       rclrbit(GPIOA_ODR, 8);
+
 }
 
 void led_off() {
-       *GPIOC_ODR = 0x0000;
+       rclrbit(GPIOD_ODR, 2);
+       rsetbit(GPIOA_ODR, 8);
 }