- /* Includes ------------------------------------------------------------------*/
- #include "main.h"
- /** @addtogroup STM32F4xx_HAL_Examples
- * @{
- */
- /** @addtogroup GPIO_EXTI
- * @{
- */
- /* Private typedef -----------------------------------------------------------*/
- /* Private define ------------------------------------------------------------*/
- /* Private macro -------------------------------------------------------------*/
- /* Private variables ---------------------------------------------------------*/
- /* Private function prototypes -----------------------------------------------*/
- static void SystemClock_Config(void);
- static void Error_Handler(void);
- static void EXTILine0_Config(void);
- /* Private functions ---------------------------------------------------------*/
- /**
- * [url=home.php?mod=space&uid=247401]@brief[/url] Main program
- * @param None
- * @retval None
- */
- int main(void)
- {
- /* This sample code shows how to use STM32F4xx GPIO HAL API to toggle PD12, PD13,
- PD14, and PD14 IOs (connected to LED4, LED3, LED5 and LED6 on STM32F401C-DISCO board (MB1115B))
- in an infinite loop.
- To proceed, 3 steps are required: */
- /* STM32F4xx HAL library initialization:
- - Configure the Flash prefetch, instruction and Data caches
- - Configure the Systick to generate an interrupt each 1 msec
- - Set NVIC Group Priority to 4
- - Global MSP (MCU Support Package) initialization
- */
- HAL_Init();
-
- /* Configure LED3, LED4, LED5 and LED6 */
- BSP_LED_Init(LED3);
- BSP_LED_Init(LED4);
- BSP_LED_Init(LED5);
- BSP_LED_Init(LED6);
-
- /* Configure the system clock to 84 MHz */
- SystemClock_Config();
-
- /* Configure EXTI Line0 (connected to PA0 pin) in interrupt mode */
- EXTILine0_Config();
-
- /* Infinite loop */
- while (1)
- {
- }
- }
- /**
- * @brief System Clock Configuration
- * The system Clock is configured as follow :
- * System Clock source = PLL (HSE)
- * SYSCLK(Hz) = 84000000
- * HCLK(Hz) = 84000000
- * AHB Prescaler = 1
- * APB1 Prescaler = 2
- * APB2 Prescaler = 1
- * HSE Frequency(Hz) = 8000000
- * PLL_M = 8
- * PLL_N = 336
- * PLL_P = 4
- * PLL_Q = 7
- * VDD(V) = 3.3
- * Main regulator output voltage = Scale2 mode
- * Flash Latency(WS) = 2
- * @param None
- * @retval None
- */
- static void SystemClock_Config(void)
- {
- RCC_ClkInitTypeDef RCC_ClkInitStruct;
- RCC_OscInitTypeDef RCC_OscInitStruct;
- /* Enable Power Control clock */
- __HAL_RCC_PWR_CLK_ENABLE();
-
- /* The voltage scaling allows optimizing the power consumption when the device is
- clocked below the maximum system frequency, to update the voltage scaling value
- regarding system frequency refer to product datasheet. */
- __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
-
- /* Enable HSE Oscillator and activate PLL with HSE as source */
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
- RCC_OscInitStruct.HSEState = RCC_HSE_ON;
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
- RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
- RCC_OscInitStruct.PLL.PLLM = 8;
- RCC_OscInitStruct.PLL.PLLN = 336;
- RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
- RCC_OscInitStruct.PLL.PLLQ = 7;
- if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
- {
- Error_Handler();
- }
- /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
- clocks dividers */
- RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
- RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
- RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
- RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
- RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
- if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
- {
- Error_Handler();
- }
- }
- /**
- * @brief Configures EXTI Line0 (connected to PA0 pin) in interrupt mode
- * @param None
- * @retval None
- */
- static void EXTILine0_Config(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- /* Enable GPIOA clock */
- __HAL_RCC_GPIOA_CLK_ENABLE();
-
- /* Configure PA0 pin as input floating */
- GPIO_InitStructure.Mode = GPIO_MODE_IT_FALLING;
- GPIO_InitStructure.Pull = GPIO_NOPULL;
- GPIO_InitStructure.Pin = GPIO_PIN_0;
- HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
- /* Enable and set EXTI Line0 Interrupt to the lowest priority */
- HAL_NVIC_SetPriority(EXTI0_IRQn, 2, 0);
- HAL_NVIC_EnableIRQ(EXTI0_IRQn);
- }
- /**
- * @brief EXTI line detection callbacks
- * @param GPIO_Pin: Specifies the pins connected EXTI line
- * @retval None
- */
- void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
- {
- if(GPIO_Pin == KEY_BUTTON_PIN)
- {
- /* Toggle LED3 */
- BSP_LED_Toggle(LED3);
- /* Toggle LED4 */
- BSP_LED_Toggle(LED4);
- /* Toggle LED5 */
- BSP_LED_Toggle(LED5);
- /* Toggle LED6 */
- BSP_LED_Toggle(LED6);
- }
- }
- /**
- * @brief This function is executed in case of error occurrence.
- * @param None
- * @retval None
- */
- static void Error_Handler(void)
- {
- /* Turn LED5 on */
- BSP_LED_On(LED5);
- while(1)
- {
- }
- }
- #ifdef USE_FULL_ASSERT
- /**
- * @brief Reports the name of the source file and the source line number
- * where the assert_param error has occurred.
- * @param file: pointer to the source file name
- * @param line: assert_param error line source number
- * @retval None
- */
- void assert_failed(uint8_t* file, uint32_t line)
- {
- /* User can add his own implementation to report the file name and line number,
- ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
- /* Infinite loop */
- while (1)
- {
- }
- }
- #endif
- /**
- * @}
- */
- /**
- * @}
- */
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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