Add 24_TIM1_PWM_VET6

workspace/stm32f407vet6_template/Core/Inc/main.h

@@ -28,6 +28,7 @@ extern "C" {
 
 /* Includes ------------------------------------------------------------------*/
 #include "stm32f4xx_hal.h"
+#include "stm32f4xx.h"
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */

workspace/stm32f407vet6_template/Core/Src/main.c

@@ -8,20 +8,21 @@ uint32_t HCLK_freq;
 uint32_t PCLK1_freq;
 uint32_t PCLK2_freq;
 
-#define LED0_Pin GPIO_PIN_13
+// LED: GPIO_PIN_13
+static void LED_GPIO_Init(void);
+
+TIM_HandleTypeDef htim3;
+static void TIM3_Init(void);
 
 UART_HandleTypeDef huart1;
-
-static void LED_GPIO_Init(void);
 static void USART1_UART_Init(void);
 
 // Override for printf function
 int __io_putchar(int ch) {
-    HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
-    return ch;
+	HAL_UART_Transmit(&huart1, (uint8_t*) &ch, 1, HAL_MAX_DELAY);
+	return ch;
 }
 
-
 void SystemClock_Config(void);
 
 int main(void) {
@@ -31,17 +32,10 @@ int main(void) {
 	SystemClock_Config();
 	LED_GPIO_Init();
 	USART1_UART_Init();
+	TIM3_Init();
 
 	while (1) {
 
-		HAL_GPIO_WritePin(GPIOE, LED0_Pin, GPIO_PIN_RESET);
-		HAL_Delay(500);
-
-		HAL_GPIO_WritePin(GPIOE, LED0_Pin, GPIO_PIN_SET);
-		HAL_Delay(500);
-
-		printf("Hello World!\r\n");
-
 	}
 
 }
@@ -52,10 +46,10 @@ static void LED_GPIO_Init(void) {
 
 	__HAL_RCC_GPIOE_CLK_ENABLE();
 
-	HAL_GPIO_WritePin(GPIOE, LED0_Pin, GPIO_PIN_SET);
+	HAL_GPIO_WritePin(GPIOE, GPIO_PIN_13, GPIO_PIN_SET);
 
 	// Configure LED0_Pin
-	GPIO_InitStruct.Pin = LED0_Pin;
+	GPIO_InitStruct.Pin = GPIO_PIN_13;
 	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 	GPIO_InitStruct.Pull = GPIO_NOPULL;
 	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
@@ -94,6 +88,38 @@ static void USART1_UART_Init(void) {
 
 }
 
+// Configure timer to timeout every second
+// System clock = 168 000 000 Hz
+// PCLK1 = 42 MHz for APB1 peripheral clock
+//       = 84 MHz for APB1 timer clock
+// PCLK2 = 84 MHz for APB2 peripheral clock
+//       = 168 MHz for APB2 timer clock
+static void TIM3_Init(void) {
+
+	__HAL_RCC_TIM3_CLK_ENABLE();
+
+	htim3.Instance = TIM3;
+	htim3.Init.Prescaler = 8400 - 1;  // 84000000 / 8400 = 10KHz
+	htim3.Init.Period = 10000 - 1; // 10000 / 10000 = 1Hz
+	htim3.Init.ClockDivision = 0;
+	htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
+	htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
+	HAL_TIM_Base_Init(&htim3);
+
+	// Enable interrupt
+	HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0);
+	HAL_NVIC_EnableIRQ(TIM3_IRQn);
+
+	// Start the TIM base generation in interrupt mode
+	HAL_TIM_Base_Start_IT(&htim3);
+
+}
+
+void TIM3_IRQHandler(void) {
+	// Call HAL_TIM_PeriodElapsedCallback()
+	HAL_TIM_IRQHandler(&htim3);
+}
+
 /**
  * @brief System Clock Configuration
  * @retval None
@@ -164,6 +190,10 @@ void SystemClock_Config(void) {
 void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
 	if (htim->Instance == TIM7) {
 		HAL_IncTick();
+	} else if (htim->Instance == TIM3) {
+		// Executes every TIM3 update event
+		printf("Toggle LED every 1s!\r\n");
+		HAL_GPIO_TogglePin(GPIOE, GPIO_PIN_13);
 	}
 }