blinky for STM32F4.

stm32-blinky/main.c

@@ -1,41 +1,68 @@
-#include <stm32f10x.h>
+#if defined STM32F1
+# include <stm32f10x.h>
+#elif defined STM32F4
+# include <stm32f4xx.h>
+#endif
 
 void initGPIO()
 {
     RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
-    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);
 
     GPIO_InitTypeDef GPIO_Config;
+#if defined STM32F1
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
+
     GPIO_Config.GPIO_Pin =  GPIO_Pin_8;
     GPIO_Config.GPIO_Mode = GPIO_Mode_AF_PP;
     GPIO_Config.GPIO_Speed = GPIO_Speed_50MHz;
+
     GPIO_Init(GPIOC, &GPIO_Config);
     GPIO_PinRemapConfig( GPIO_FullRemap_TIM3, ENABLE );
+#elif defined STM32F4
+    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
+
+    GPIO_Config.GPIO_Mode = GPIO_Mode_AF;
+    GPIO_Config.GPIO_OType = GPIO_OType_PP;
+    GPIO_Config.GPIO_Pin = GPIO_Pin_6;
+    GPIO_Config.GPIO_PuPd = GPIO_PuPd_NOPULL;
+    GPIO_Config.GPIO_Speed = GPIO_Speed_2MHz;
+
+    GPIO_Init(GPIOA, &GPIO_Config);
+    GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_TIM3);
+#endif
 }
 
 void initTimers()
 {
+	SystemCoreClockUpdate();
+
     TIM_TimeBaseInitTypeDef TIM_BaseConfig;
     TIM_OCInitTypeDef TIM_OCConfig;
 
-    // 0 kHz timer.
+    // 10 kHz timer.
     TIM_BaseConfig.TIM_Prescaler = (uint16_t)(SystemCoreClock / 10000) - 1;
-    // 10000 / 5000 = 2 Hz blinking.
+    // 10000 / 5000 = 1 Hz blinking.
     TIM_BaseConfig.TIM_Period = 5000;
     TIM_BaseConfig.TIM_ClockDivision = 0;
     TIM_BaseConfig.TIM_CounterMode = TIM_CounterMode_Up;
-    TIM_TimeBaseInit(TIM3, &TIM_BaseConfig);
 
     TIM_OCConfig.TIM_OCMode = TIM_OCMode_PWM1;
     TIM_OCConfig.TIM_OutputState = TIM_OutputState_Enable;
     // 2500 / 5000 = 50% duty cycle.
     TIM_OCConfig.TIM_Pulse = 2499;
     TIM_OCConfig.TIM_OCPolarity = TIM_OCPolarity_High;
+
+#if defined STM32F1
     TIM_OC3Init(TIM3, &TIM_OCConfig);
+#elif defined STM32F4
+    // For STM32F4 timer clock = SystemCoreClock / 2 by default.
+    TIM_BaseConfig.TIM_Prescaler = (uint16_t)(SystemCoreClock / 2 / 10000) - 1;
+    TIM_OC1Init(TIM3, &TIM_OCConfig);
+#endif
 
     TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
+    TIM_TimeBaseInit(TIM3, &TIM_BaseConfig);
     TIM_ARRPreloadConfig(TIM3, ENABLE);
-
     TIM_Cmd(TIM3, ENABLE);
 }