mirror of
https://github.com/STMicroelectronics/STM32CubeF0.git
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231 lines
6.7 KiB
C
231 lines
6.7 KiB
C
/**
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******************************************************************************
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* @file GPIO/GPIO_EXTI/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to configure and use GPIOs through
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* the STM32F0xx HAL API.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F0xx_HAL_Examples
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* @{
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*/
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/** @addtogroup GPIO_EXTI
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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static void EXTI4_15_IRQHandler_Config(void);
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static void EXTI0_1_IRQHandler_Config(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F0xx HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Low Level Initialization
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*/
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HAL_Init();
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/* -1- Initialize LEDs mounted on STM32072B-EVAL board */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED2);
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/* Configure the system clock to 48 MHz */
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SystemClock_Config();
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/* -2- Configure EXTI4_15 (connected to PC.13 pin) in interrupt mode */
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EXTI4_15_IRQHandler_Config();
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/* -3- Configure EXTI0_1 (connected to PA.00 pin) in interrupt mode */
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EXTI0_1_IRQHandler_Config();
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/* Infinite loop */
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 48000000
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* HCLK(Hz) = 48000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 1
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* HSE Frequency(Hz) = 8000000
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* PREDIV = 1
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* PLLMUL = 6
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* Flash Latency(WS) = 1
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Enable HSE Oscillator and Activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
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{
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Error_Handler();
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= HAL_OK)
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{
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Error_Handler();
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* User may add here some code to deal with this error */
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while(1)
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{
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}
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}
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/**
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* @brief Configures EXTI lines 0 to 1 (connected to PA.00 pin) in interrupt mode
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* @param None
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* @retval None
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*/
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static void EXTI0_1_IRQHandler_Config(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Enable GPIOA clock */
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__HAL_RCC_GPIOA_CLK_ENABLE();
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/* Configure PA.00 pin as input floating */
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GPIO_InitStructure.Mode = GPIO_MODE_IT_FALLING;
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GPIO_InitStructure.Pull = GPIO_PULLDOWN;
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GPIO_InitStructure.Pin = GPIO_PIN_0;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
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/* Enable and set EXTI lines 0 to 1 Interrupt to the lowest priority */
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HAL_NVIC_SetPriority(EXTI0_1_IRQn, 2, 0);
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HAL_NVIC_EnableIRQ(EXTI0_1_IRQn);
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}
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/**
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* @brief Configures EXTI lines 4 to 15 (connected to PC.13 pin) in interrupt mode
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* @param None
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* @retval None
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*/
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static void EXTI4_15_IRQHandler_Config(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Enable GPIOC clock */
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__HAL_RCC_GPIOC_CLK_ENABLE();
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/* Configure PC.13 pin as input floating */
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GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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GPIO_InitStructure.Pin = GPIO_PIN_13;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
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/* Enable and set EXTI lines 4 to 15 Interrupt to the lowest priority */
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HAL_NVIC_SetPriority(EXTI4_15_IRQn, 2, 0);
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HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);
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}
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/**
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* @brief EXTI line detection callbacks
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* @param GPIO_Pin: Specifies the pins connected EXTI line
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* @retval None
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*/
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void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
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{
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if (GPIO_Pin == GPIO_PIN_13)
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{
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/* Toggle LED1 */
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BSP_LED_Toggle(LED1);
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}
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if (GPIO_Pin == GPIO_PIN_0)
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{
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/* Toggle LED2 */
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BSP_LED_Toggle(LED2);
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}
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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