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/** |
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****************************************************************************** |
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* @file stm32f0xx_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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@verbatim |
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============================================================================== |
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##### GPIO Peripheral features ##### |
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============================================================================== |
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[..] |
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(+) Each port bit of the general-purpose I/O (GPIO) ports can be individually |
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configured by software 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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(+) 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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(+) 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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(+) 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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(+) The microcontroller IO pins are connected to onboard peripherals/modules through a |
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multiplexer that allows only one peripheral alternate function (AF) connected |
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to an IO pin at a time. In this way, there can be no conflict between peripherals |
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sharing the same IO pin. |
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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 28 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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|
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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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|
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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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(#) HAL_GPIO_DeInit allows to set register values to their reset value. It's also |
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recommended to use it to unconfigure pin which was used as an external interrupt |
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or in event mode. That's the only way to reset corresponding bit in EXTI & SYSCFG |
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registers. |
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|
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(#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin(). |
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|
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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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|
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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 PF0 and PF1, 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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* @attention |
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* |
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
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* |
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* Redistribution and use in source and binary forms, with or without modification, |
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* are permitted provided that the following conditions are met: |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* 3. Neither the name of STMicroelectronics nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************** |
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*/ |
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/* Includes ------------------------------------------------------------------*/ |
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#include "stm32f0xx_hal.h" |
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/** @addtogroup STM32F0xx_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 defines -----------------------------------------------------------*/ |
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/** @defgroup GPIO_Private_Defines GPIO Private Defines |
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* @{ |
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*/ |
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#define GPIO_MODE (0x00000003U) |
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#define EXTI_MODE (0x10000000U) |
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#define GPIO_MODE_IT (0x00010000U) |
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#define GPIO_MODE_EVT (0x00020000U) |
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#define RISING_EDGE (0x00100000U) |
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#define FALLING_EDGE (0x00200000U) |
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#define GPIO_OUTPUT_TYPE (0x00000010U) |
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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 macros ------------------------------------------------------------*/ |
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/* Private variables ---------------------------------------------------------*/ |
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/* Private function prototypes -----------------------------------------------*/ |
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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/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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@endverbatim |
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* @{ |
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*/ |
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/** |
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* @brief Initialize the GPIOx peripheral according to the specified parameters in the GPIO_Init. |
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* @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32F0 family |
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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 = 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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assert_param(IS_GPIO_PULL(GPIO_Init->Pull)); |
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/* Configure the port pins */ |
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while (((GPIO_Init->Pin) >> position) != RESET) |
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{ |
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/* Get current io position */ |
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iocurrent = (GPIO_Init->Pin) & (1U << position); |
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if(iocurrent) |
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{ |
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/*--------------------- GPIO Mode Configuration ------------------------*/ |
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/* In case of Alternate function mode selection */ |
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if((GPIO_Init->Mode == GPIO_MODE_AF_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_OD)) |
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{ |
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/* Check the Alternate function parameters */ |
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assert_param(IS_GPIO_AF_INSTANCE(GPIOx)); |
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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 >> 3]; |
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CLEAR_BIT(temp, 0xFU << ((uint32_t)(position & 0x07U) * 4U)) ; |
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SET_BIT(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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CLEAR_BIT(temp, GPIO_MODER_MODER0 << (position * 2U)); |
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SET_BIT(temp, (GPIO_Init->Mode & GPIO_MODE) << (position * 2U)); |
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GPIOx->MODER = temp; |
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/* In case of Output or Alternate function mode selection */ |
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if ((GPIO_Init->Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_PP) || |
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(GPIO_Init->Mode == GPIO_MODE_OUTPUT_OD) || (GPIO_Init->Mode == GPIO_MODE_AF_OD)) |
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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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CLEAR_BIT(temp, GPIO_OSPEEDER_OSPEEDR0 << (position * 2U)); |
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SET_BIT(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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CLEAR_BIT(temp, GPIO_OTYPER_OT_0 << position) ; |
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SET_BIT(temp, ((GPIO_Init->Mode & GPIO_OUTPUT_TYPE) >> 4U) << position); |
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GPIOx->OTYPER = temp; |
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} |
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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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CLEAR_BIT(temp, GPIO_PUPDR_PUPDR0 << (position * 2U)); |
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SET_BIT(temp, (GPIO_Init->Pull) << (position * 2U)); |
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GPIOx->PUPDR = 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) == EXTI_MODE) |
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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 >> 2]; |
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CLEAR_BIT(temp, (0x0FU) << (4U * (position & 0x03U))); |
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SET_BIT(temp, (GPIO_GET_INDEX(GPIOx)) << (4U * (position & 0x03U))); |
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SYSCFG->EXTICR[position >> 2] = temp; |
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/* Clear EXTI line configuration */ |
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temp = EXTI->IMR; |
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CLEAR_BIT(temp, (uint32_t)iocurrent); |
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if((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT) |
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{ |
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SET_BIT(temp, iocurrent); |
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} |
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EXTI->IMR = temp; |
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temp = EXTI->EMR; |
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CLEAR_BIT(temp, (uint32_t)iocurrent); |
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if((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT) |
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{ |
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SET_BIT(temp, iocurrent); |
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} |
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EXTI->EMR = temp; |
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/* Clear Rising Falling edge configuration */ |
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temp = EXTI->RTSR; |
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CLEAR_BIT(temp, (uint32_t)iocurrent); |
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if((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE) |
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{ |
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SET_BIT(temp, iocurrent); |
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} |
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EXTI->RTSR = temp; |
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temp = EXTI->FTSR; |
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CLEAR_BIT(temp, (uint32_t)iocurrent); |
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if((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE) |
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{ |
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SET_BIT(temp, iocurrent); |
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} |
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EXTI->FTSR = temp; |
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} |
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} |
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position++; |
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} |
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} |
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|
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/** |
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* @brief De-initialize the GPIOx peripheral registers to their default reset values. |
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* @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32F0 family |
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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 = 0x00U; |
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uint32_t iocurrent = 0x00U; |
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uint32_t tmp = 0x00U; |
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|
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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_Pin)); |
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|
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/* Configure the port pins */ |
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while ((GPIO_Pin >> position) != RESET) |
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{ |
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/* Get current io position */ |
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iocurrent = GPIO_Pin & (1U << position); |
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if (iocurrent) |
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{ |
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/*------------------------- GPIO Mode Configuration --------------------*/ |
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/* Configure IO Direction in Input Floting Mode */ |
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CLEAR_BIT(GPIOx->MODER, GPIO_MODER_MODER0 << (position * 2U)); |
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|
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/* Configure the default Alternate Function in current IO */ |
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CLEAR_BIT(GPIOx->AFR[position >> 3U], 0xFU << ((uint32_t)(position & 0x07U) * 4U)) ; |
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|
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/* Configure the default value for IO Speed */ |
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CLEAR_BIT(GPIOx->OSPEEDR, GPIO_OSPEEDER_OSPEEDR0 << (position * 2U)); |
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|
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/* Configure the default value IO Output Type */ |
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CLEAR_BIT(GPIOx->OTYPER, GPIO_OTYPER_OT_0 << position) ; |
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|
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/* Deactivate the Pull-up oand Pull-down resistor for the current IO */ |
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CLEAR_BIT(GPIOx->PUPDR, GPIO_PUPDR_PUPDR0 << (position * 2U)); |
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|
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/*------------------------- EXTI Mode Configuration --------------------*/ |
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/* Clear the External Interrupt or Event for the current IO */ |
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|
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tmp = SYSCFG->EXTICR[position >> 2U]; |
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tmp &= ((0x0FU) << (4U * (position & 0x03U))); |
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if(tmp == (GPIO_GET_INDEX(GPIOx) << (4U * (position & 0x03U)))) |
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{ |
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tmp = (0x0FU) << (4U * (position & 0x03U)); |
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CLEAR_BIT(SYSCFG->EXTICR[position >> 2U], tmp); |
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|
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/* Clear EXTI line configuration */ |
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CLEAR_BIT(EXTI->IMR, (uint32_t)iocurrent); |
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CLEAR_BIT(EXTI->EMR, (uint32_t)iocurrent); |
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|
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/* Clear Rising Falling edge configuration */ |
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CLEAR_BIT(EXTI->RTSR, (uint32_t)iocurrent); |
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CLEAR_BIT(EXTI->FTSR, (uint32_t)iocurrent); |
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} |
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} |
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|
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position++; |
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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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|
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/** @defgroup GPIO_Exported_Functions_Group2 IO operation functions |
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* @brief GPIO Read, Write, Toggle, Lock and EXTI management functions. |
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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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|
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@endverbatim |
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* @{ |
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*/ |
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|
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/** |
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* @brief Read the specified input port pin. |
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* @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32F0 family |
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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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|
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/* Check the parameters */ |
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assert_param(IS_GPIO_PIN(GPIO_Pin)); |
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|
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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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/** |
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* @brief Set or clear the selected data port bit. |
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* @note This function uses GPIOx_BSRR and GPIOx_BRR registers 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..H) to select the GPIO peripheral for STM32F0 family |
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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 |
|
422 |
* @arg GPIO_PIN_SET: to set the port pin |
|
423 |
* @retval None |
|
424 |
*/ |
|
425 |
void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState) |
|
426 |
{ |
|
427 |
/* Check the parameters */ |
|
428 |
assert_param(IS_GPIO_PIN(GPIO_Pin)); |
|
429 |
assert_param(IS_GPIO_PIN_ACTION(PinState)); |
|
430 |
|
|
431 |
if (PinState != GPIO_PIN_RESET) |
|
432 |
{ |
|
433 |
GPIOx->BSRR = (uint32_t)GPIO_Pin; |
|
434 |
} |
|
435 |
else |
|
436 |
{ |
|
437 |
GPIOx->BRR = (uint32_t)GPIO_Pin; |
|
438 |
} |
|
439 |
} |
|
440 |
|
|
441 |
/** |
|
442 |
* @brief Toggle the specified GPIO pin. |
|
443 |
* @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32F0 family |
|
444 |
* @param GPIO_Pin specifies the pin to be toggled. |
|
445 |
* @retval None |
|
446 |
*/ |
|
447 |
void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) |
|
448 |
{ |
|
449 |
/* Check the parameters */ |
|
450 |
assert_param(IS_GPIO_PIN(GPIO_Pin)); |
|
451 |
|
|
452 |
GPIOx->ODR ^= GPIO_Pin; |
|
453 |
} |
|
454 |
|
|
455 |
/** |
|
456 |
* @brief Locks GPIO Pins configuration registers. |
|
457 |
* @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR, |
|
458 |
* GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH. |
|
459 |
* @note The configuration of the locked GPIO pins can no longer be modified |
|
460 |
* until the next reset. |
|
461 |
* @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32F0 family |
|
462 |
* @param GPIO_Pin specifies the port bits to be locked. |
|
463 |
* This parameter can be any combination of GPIO_Pin_x where x can be (0..15). |
|
464 |
* @retval None |
|
465 |
*/ |
|
466 |
HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) |
|
467 |
{ |
|
468 |
__IO uint32_t tmp = GPIO_LCKR_LCKK; |
|
469 |
|
|
470 |
/* Check the parameters */ |
|
471 |
assert_param(IS_GPIO_LOCK_INSTANCE(GPIOx)); |
|
472 |
assert_param(IS_GPIO_PIN(GPIO_Pin)); |
|
473 |
|
|
474 |
/* Apply lock key write sequence */ |
|
475 |
SET_BIT(tmp, GPIO_Pin); |
|
476 |
/* Set LCKx bit(s): LCKK='1' + LCK[15-0] */ |
|
477 |
GPIOx->LCKR = tmp; |
|
478 |
/* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */ |
|
479 |
GPIOx->LCKR = GPIO_Pin; |
|
480 |
/* Set LCKx bit(s): LCKK='1' + LCK[15-0] */ |
|
481 |
GPIOx->LCKR = tmp; |
|
482 |
/* Read LCKK bit*/ |
|
483 |
tmp = GPIOx->LCKR; |
|
484 |
|
|
485 |
if((GPIOx->LCKR & GPIO_LCKR_LCKK) != RESET) |
|
486 |
{ |
|
487 |
return HAL_OK; |
|
488 |
} |
|
489 |
else |
|
490 |
{ |
|
491 |
return HAL_ERROR; |
|
492 |
} |
|
493 |
} |
|
494 |
|
|
495 |
/** |
|
496 |
* @brief Handle EXTI interrupt request. |
|
497 |
* @param GPIO_Pin Specifies the port pin connected to corresponding EXTI line. |
|
498 |
* @retval None |
|
499 |
*/ |
|
500 |
void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin) |
|
501 |
{ |
|
502 |
/* EXTI line interrupt detected */ |
|
503 |
if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET) |
|
504 |
{ |
|
505 |
__HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin); |
|
506 |
HAL_GPIO_EXTI_Callback(GPIO_Pin); |
|
507 |
} |
|
508 |
} |
|
509 |
|
|
510 |
/** |
|
511 |
* @brief EXTI line detection callback. |
|
512 |
* @param GPIO_Pin Specifies the port pin connected to corresponding EXTI line. |
|
513 |
* @retval None |
|
514 |
*/ |
|
515 |
__weak void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) |
|
516 |
{ |
|
517 |
/* Prevent unused argument(s) compilation warning */ |
|
518 |
UNUSED(GPIO_Pin); |
|
519 |
|
|
520 |
/* NOTE: This function should not be modified, when the callback is needed, |
|
521 |
the HAL_GPIO_EXTI_Callback could be implemented in the user file |
|
522 |
*/ |
|
523 |
} |
|
524 |
|
|
525 |
/** |
|
526 |
* @} |
|
527 |
*/ |
|
528 |
|
|
529 |
|
|
530 |
/** |
|
531 |
* @} |
|
532 |
*/ |
|
533 |
|
|
534 |
#endif /* HAL_GPIO_MODULE_ENABLED */ |
|
535 |
/** |
|
536 |
* @} |
|
537 |
*/ |
|
538 |
|
|
539 |
/** |
|
540 |
* @} |
|
541 |
*/ |
|
542 |
|
|
543 |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |