534 lines
18 KiB
C
534 lines
18 KiB
C
/**
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******************************************************************************
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* @file stm32f4xx_hal_gpio.c
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* @author MCD Application Team
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* @brief GPIO HAL module driver.
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* This file provides firmware functions to manage the following
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* functionalities of the General Purpose Input/Output (GPIO) peripheral:
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* + Initialization and de-initialization functions
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* + IO operation functions
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@verbatim
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==============================================================================
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##### GPIO Peripheral features #####
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==============================================================================
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[..]
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Subject to the specific hardware characteristics of each I/O port listed in the datasheet, each
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port bit of the General Purpose IO (GPIO) Ports, can be individually configured by software
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in several modes:
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(+) Input mode
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(+) Analog mode
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(+) Output mode
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(+) Alternate function mode
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(+) External interrupt/event lines
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[..]
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During and just after reset, the alternate functions and external interrupt
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lines are not active and the I/O ports are configured in input floating mode.
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[..]
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All GPIO pins have weak internal pull-up and pull-down resistors, which can be
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activated or not.
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[..]
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In Output or Alternate mode, each IO can be configured on open-drain or push-pull
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type and the IO speed can be selected depending on the VDD value.
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[..]
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All ports have external interrupt/event capability. To use external interrupt
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lines, the port must be configured in input mode. All available GPIO pins are
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connected to the 16 external interrupt/event lines from EXTI0 to EXTI15.
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[..]
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The external interrupt/event controller consists of up to 23 edge detectors
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(16 lines are connected to GPIO) for generating event/interrupt requests (each
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input line can be independently configured to select the type (interrupt or event)
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and the corresponding trigger event (rising or falling or both). Each line can
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also be masked independently.
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##### How to use this driver #####
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==============================================================================
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[..]
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(#) Enable the GPIO AHB clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE().
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(#) Configure the GPIO pin(s) using HAL_GPIO_Init().
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(++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure
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(++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef
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structure.
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(++) In case of Output or alternate function mode selection: the speed is
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configured through "Speed" member from GPIO_InitTypeDef structure.
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(++) In alternate mode is selection, the alternate function connected to the IO
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is configured through "Alternate" member from GPIO_InitTypeDef structure.
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(++) Analog mode is required when a pin is to be used as ADC channel
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or DAC output.
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(++) In case of external interrupt/event selection the "Mode" member from
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GPIO_InitTypeDef structure select the type (interrupt or event) and
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the corresponding trigger event (rising or falling or both).
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(#) In case of external interrupt/event mode selection, configure NVIC IRQ priority
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mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using
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HAL_NVIC_EnableIRQ().
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(#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin().
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(#) To set/reset the level of a pin configured in output mode use
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HAL_GPIO_WritePin()/HAL_GPIO_TogglePin().
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(#) To lock pin configuration until next reset use HAL_GPIO_LockPin().
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(#) During and just after reset, the alternate functions are not
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active and the GPIO pins are configured in input floating mode (except JTAG
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pins).
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(#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose
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(PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has
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priority over the GPIO function.
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(#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as
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general purpose PH0 and PH1, respectively, when the HSE oscillator is off.
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The HSE has priority over the GPIO function.
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@endverbatim
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_hal.h"
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/** @addtogroup STM32F4xx_HAL_Driver
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* @{
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*/
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/** @defgroup GPIO GPIO
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* @brief GPIO HAL module driver
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* @{
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*/
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#ifdef HAL_GPIO_MODULE_ENABLED
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/** @addtogroup GPIO_Private_Constants GPIO Private Constants
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* @{
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*/
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#define GPIO_NUMBER 16U
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/**
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* @}
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*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @defgroup GPIO_Exported_Functions GPIO Exported Functions
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* @{
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*/
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/** @defgroup GPIO_Exported_Functions_Group1 Initialization and de-initialization functions
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* @brief Initialization and Configuration functions
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*
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@verbatim
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===============================================================================
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##### Initialization and de-initialization functions #####
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===============================================================================
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[..]
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This section provides functions allowing to initialize and de-initialize the GPIOs
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to be ready for use.
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@endverbatim
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* @{
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*/
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/**
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* @brief Initializes the GPIOx peripheral according to the specified parameters in the GPIO_Init.
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* @param GPIOx where x can be (A..K) to select the GPIO peripheral for STM32F429X device or
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* x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
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* @param GPIO_Init pointer to a GPIO_InitTypeDef structure that contains
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* the configuration information for the specified GPIO peripheral.
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* @retval None
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*/
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void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_Init)
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{
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uint32_t position;
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uint32_t ioposition = 0x00U;
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uint32_t iocurrent = 0x00U;
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uint32_t temp = 0x00U;
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/* Check the parameters */
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assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
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assert_param(IS_GPIO_PIN(GPIO_Init->Pin));
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assert_param(IS_GPIO_MODE(GPIO_Init->Mode));
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/* Configure the port pins */
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for(position = 0U; position < GPIO_NUMBER; position++)
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{
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/* Get the IO position */
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ioposition = 0x01U << position;
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/* Get the current IO position */
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iocurrent = (uint32_t)(GPIO_Init->Pin) & ioposition;
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if(iocurrent == ioposition)
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{
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/*--------------------- GPIO Mode Configuration ------------------------*/
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/* In case of Output or Alternate function mode selection */
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if(((GPIO_Init->Mode & GPIO_MODE) == MODE_OUTPUT) || \
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(GPIO_Init->Mode & GPIO_MODE) == MODE_AF)
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{
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/* Check the Speed parameter */
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assert_param(IS_GPIO_SPEED(GPIO_Init->Speed));
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/* Configure the IO Speed */
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temp = GPIOx->OSPEEDR;
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temp &= ~(GPIO_OSPEEDER_OSPEEDR0 << (position * 2U));
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temp |= (GPIO_Init->Speed << (position * 2U));
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GPIOx->OSPEEDR = temp;
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/* Configure the IO Output Type */
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temp = GPIOx->OTYPER;
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temp &= ~(GPIO_OTYPER_OT_0 << position) ;
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temp |= (((GPIO_Init->Mode & OUTPUT_TYPE) >> OUTPUT_TYPE_Pos) << position);
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GPIOx->OTYPER = temp;
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}
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if((GPIO_Init->Mode & GPIO_MODE) != MODE_ANALOG)
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{
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/* Check the parameters */
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assert_param(IS_GPIO_PULL(GPIO_Init->Pull));
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/* Activate the Pull-up or Pull down resistor for the current IO */
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temp = GPIOx->PUPDR;
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temp &= ~(GPIO_PUPDR_PUPDR0 << (position * 2U));
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temp |= ((GPIO_Init->Pull) << (position * 2U));
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GPIOx->PUPDR = temp;
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}
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/* In case of Alternate function mode selection */
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if((GPIO_Init->Mode & GPIO_MODE) == MODE_AF)
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{
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/* Check the Alternate function parameter */
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assert_param(IS_GPIO_AF(GPIO_Init->Alternate));
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/* Configure Alternate function mapped with the current IO */
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temp = GPIOx->AFR[position >> 3U];
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temp &= ~(0xFU << ((uint32_t)(position & 0x07U) * 4U)) ;
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temp |= ((uint32_t)(GPIO_Init->Alternate) << (((uint32_t)position & 0x07U) * 4U));
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GPIOx->AFR[position >> 3U] = temp;
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}
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/* Configure IO Direction mode (Input, Output, Alternate or Analog) */
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temp = GPIOx->MODER;
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temp &= ~(GPIO_MODER_MODER0 << (position * 2U));
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temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * 2U));
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GPIOx->MODER = temp;
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/*--------------------- EXTI Mode Configuration ------------------------*/
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/* Configure the External Interrupt or event for the current IO */
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if((GPIO_Init->Mode & EXTI_MODE) != 0x00U)
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{
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/* Enable SYSCFG Clock */
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__HAL_RCC_SYSCFG_CLK_ENABLE();
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temp = SYSCFG->EXTICR[position >> 2U];
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temp &= ~(0x0FU << (4U * (position & 0x03U)));
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temp |= ((uint32_t)(GPIO_GET_INDEX(GPIOx)) << (4U * (position & 0x03U)));
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SYSCFG->EXTICR[position >> 2U] = temp;
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/* Clear Rising Falling edge configuration */
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temp = EXTI->RTSR;
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temp &= ~((uint32_t)iocurrent);
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if((GPIO_Init->Mode & TRIGGER_RISING) != 0x00U)
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{
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temp |= iocurrent;
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}
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EXTI->RTSR = temp;
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temp = EXTI->FTSR;
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temp &= ~((uint32_t)iocurrent);
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if((GPIO_Init->Mode & TRIGGER_FALLING) != 0x00U)
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{
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temp |= iocurrent;
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}
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EXTI->FTSR = temp;
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temp = EXTI->EMR;
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temp &= ~((uint32_t)iocurrent);
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if((GPIO_Init->Mode & EXTI_EVT) != 0x00U)
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{
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temp |= iocurrent;
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}
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EXTI->EMR = temp;
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/* Clear EXTI line configuration */
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temp = EXTI->IMR;
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temp &= ~((uint32_t)iocurrent);
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if((GPIO_Init->Mode & EXTI_IT) != 0x00U)
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{
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temp |= iocurrent;
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}
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EXTI->IMR = temp;
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}
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}
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}
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}
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/**
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* @brief De-initializes the GPIOx peripheral registers to their default reset values.
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* @param GPIOx where x can be (A..K) to select the GPIO peripheral for STM32F429X device or
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* x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
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* @param GPIO_Pin specifies the port bit to be written.
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* This parameter can be one of GPIO_PIN_x where x can be (0..15).
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* @retval None
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*/
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void HAL_GPIO_DeInit(GPIO_TypeDef *GPIOx, uint32_t GPIO_Pin)
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{
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uint32_t position;
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uint32_t ioposition = 0x00U;
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uint32_t iocurrent = 0x00U;
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uint32_t tmp = 0x00U;
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/* Check the parameters */
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assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
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/* Configure the port pins */
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for(position = 0U; position < GPIO_NUMBER; position++)
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{
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/* Get the IO position */
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ioposition = 0x01U << position;
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/* Get the current IO position */
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iocurrent = (GPIO_Pin) & ioposition;
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if(iocurrent == ioposition)
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{
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/*------------------------- EXTI Mode Configuration --------------------*/
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tmp = SYSCFG->EXTICR[position >> 2U];
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tmp &= (0x0FU << (4U * (position & 0x03U)));
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if(tmp == ((uint32_t)(GPIO_GET_INDEX(GPIOx)) << (4U * (position & 0x03U))))
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{
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/* Clear EXTI line configuration */
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EXTI->IMR &= ~((uint32_t)iocurrent);
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EXTI->EMR &= ~((uint32_t)iocurrent);
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/* Clear Rising Falling edge configuration */
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EXTI->FTSR &= ~((uint32_t)iocurrent);
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EXTI->RTSR &= ~((uint32_t)iocurrent);
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/* Configure the External Interrupt or event for the current IO */
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tmp = 0x0FU << (4U * (position & 0x03U));
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SYSCFG->EXTICR[position >> 2U] &= ~tmp;
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}
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/*------------------------- GPIO Mode Configuration --------------------*/
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/* Configure IO Direction in Input Floating Mode */
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (position * 2U));
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/* Configure the default Alternate Function in current IO */
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GPIOx->AFR[position >> 3U] &= ~(0xFU << ((uint32_t)(position & 0x07U) * 4U)) ;
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/* Deactivate the Pull-up and Pull-down resistor for the current IO */
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << (position * 2U));
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/* Configure the default value IO Output Type */
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GPIOx->OTYPER &= ~(GPIO_OTYPER_OT_0 << position) ;
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/* Configure the default value for IO Speed */
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (position * 2U));
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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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/** @defgroup GPIO_Exported_Functions_Group2 IO operation functions
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* @brief GPIO Read and Write
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*
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@verbatim
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===============================================================================
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##### IO operation functions #####
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Reads the specified input port pin.
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* @param GPIOx where x can be (A..K) to select the GPIO peripheral for STM32F429X device or
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* x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
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* @param GPIO_Pin specifies the port bit to read.
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* This parameter can be GPIO_PIN_x where x can be (0..15).
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* @retval The input port pin value.
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*/
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GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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{
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GPIO_PinState bitstatus;
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/* Check the parameters */
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assert_param(IS_GPIO_PIN(GPIO_Pin));
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if((GPIOx->IDR & GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
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{
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bitstatus = GPIO_PIN_SET;
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}
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else
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{
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bitstatus = GPIO_PIN_RESET;
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}
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return bitstatus;
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}
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/**
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* @brief Sets or clears the selected data port bit.
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*
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* @note This function uses GPIOx_BSRR register to allow atomic read/modify
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* accesses. In this way, there is no risk of an IRQ occurring between
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* the read and the modify access.
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*
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* @param GPIOx where x can be (A..K) to select the GPIO peripheral for STM32F429X device or
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* x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
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* @param GPIO_Pin specifies the port bit to be written.
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* This parameter can be one of GPIO_PIN_x where x can be (0..15).
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* @param PinState specifies the value to be written to the selected bit.
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* This parameter can be one of the GPIO_PinState enum values:
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* @arg GPIO_PIN_RESET: to clear the port pin
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* @arg GPIO_PIN_SET: to set the port pin
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* @retval None
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*/
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void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
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{
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/* Check the parameters */
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assert_param(IS_GPIO_PIN(GPIO_Pin));
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assert_param(IS_GPIO_PIN_ACTION(PinState));
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if(PinState != GPIO_PIN_RESET)
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{
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GPIOx->BSRR = GPIO_Pin;
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}
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else
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{
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GPIOx->BSRR = (uint32_t)GPIO_Pin << 16U;
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}
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}
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/**
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* @brief Toggles the specified GPIO pins.
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* @param GPIOx Where x can be (A..K) to select the GPIO peripheral for STM32F429X device or
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* x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
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* @param GPIO_Pin Specifies the pins to be toggled.
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* @retval None
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*/
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void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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{
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uint32_t odr;
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/* Check the parameters */
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assert_param(IS_GPIO_PIN(GPIO_Pin));
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/* get current Output Data Register value */
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odr = GPIOx->ODR;
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/* Set selected pins that were at low level, and reset ones that were high */
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GPIOx->BSRR = ((odr & GPIO_Pin) << GPIO_NUMBER) | (~odr & GPIO_Pin);
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}
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/**
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* @brief Locks GPIO Pins configuration registers.
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* @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
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* GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
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* @note The configuration of the locked GPIO pins can no longer be modified
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* until the next reset.
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* @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32F4 family
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* @param GPIO_Pin specifies the port bit to be locked.
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* This parameter can be any combination of GPIO_PIN_x where x can be (0..15).
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* @retval None
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*/
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HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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{
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__IO uint32_t tmp = GPIO_LCKR_LCKK;
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/* Check the parameters */
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assert_param(IS_GPIO_PIN(GPIO_Pin));
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/* Apply lock key write sequence */
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tmp |= GPIO_Pin;
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/* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
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GPIOx->LCKR = tmp;
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/* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */
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GPIOx->LCKR = GPIO_Pin;
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/* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
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GPIOx->LCKR = tmp;
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/* Read LCKR register. This read is mandatory to complete key lock sequence */
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tmp = GPIOx->LCKR;
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/* Read again in order to confirm lock is active */
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if((GPIOx->LCKR & GPIO_LCKR_LCKK) != RESET)
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{
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return HAL_OK;
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}
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else
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{
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return HAL_ERROR;
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}
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}
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/**
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* @brief This function handles EXTI interrupt request.
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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_IRQHandler(uint16_t GPIO_Pin)
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{
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/* EXTI line interrupt detected */
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if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET)
|
|
{
|
|
__HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin);
|
|
HAL_GPIO_EXTI_Callback(GPIO_Pin);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief EXTI line detection callbacks.
|
|
* @param GPIO_Pin Specifies the pins connected EXTI line
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(GPIO_Pin);
|
|
/* NOTE: This function Should not be modified, when the callback is needed,
|
|
the HAL_GPIO_EXTI_Callback could be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* HAL_GPIO_MODULE_ENABLED */
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|