Add GPIO speed setting.

2 files changed, 12 insertions, 1 deletions

diff --git a/gpio/gpio.h b/gpio/gpio.h
index ef7186f..725d4df 100644
--- a/gpio/gpio.h
+++ b/gpio/gpio.h
@@ -13,7 +13,7 @@ struct GPIO_t {
 	#elif defined(STM32F4)
 	volatile uint32_t MODER;
 	volatile uint32_t OTYPER;
-	volatile uint32_t OSPEEDER;
+	volatile uint32_t OSPEEDR;
 	volatile uint32_t PUPDR;
 	volatile uint32_t IDR;
 	volatile uint32_t ODR;
diff --git a/gpio/pin.h b/gpio/pin.h
index 90026c3..aede480 100644
--- a/gpio/pin.h
+++ b/gpio/pin.h
@@ -36,6 +36,13 @@ class Pin {
 			PullDown,
 		};
 		
+		enum Speed {
+			Low,
+			Medium,
+			Fast,
+			High,
+		};
+		
 		void set_mode(Mode m) {
 			#if defined(STM32F1)
 			if(n < 8) {
@@ -78,6 +85,10 @@ class Pin {
 			#endif
 		}
 		
+		void set_speed(Speed s) {
+			g.OSPEEDR = (g.OSPEEDR & ~(3 << (n * 2))) | s << (n * 2);
+		}
+		
 		void on() {
 			g.BSRR = 1 << n;
 		}