/** | |
****************************************************************************** | |
* @file stm32l4xx_hal_gpio.c | |
* @author MCD Application Team | |
* @brief GPIO HAL module driver. | |
* This file provides firmware functions to manage the following | |
* functionalities of the General Purpose Input/Output (GPIO) peripheral: | |
* + Initialization and de-initialization functions | |
* + IO operation functions | |
* | |
@verbatim | |
============================================================================== | |
##### GPIO Peripheral features ##### | |
============================================================================== | |
[..] | |
(+) Each port bit of the general-purpose I/O (GPIO) ports can be individually | |
configured by software in several modes: | |
(++) Input mode | |
(++) Analog mode | |
(++) Output mode | |
(++) Alternate function mode | |
(++) External interrupt/event lines | |
(+) During and just after reset, the alternate functions and external interrupt | |
lines are not active and the I/O ports are configured in input floating mode. | |
(+) All GPIO pins have weak internal pull-up and pull-down resistors, which can be | |
activated or not. | |
(+) In Output or Alternate mode, each IO can be configured on open-drain or push-pull | |
type and the IO speed can be selected depending on the VDD value. | |
(+) The microcontroller IO pins are connected to onboard peripherals/modules through a | |
multiplexer that allows only one peripheral alternate function (AF) connected | |
to an IO pin at a time. In this way, there can be no conflict between peripherals | |
sharing the same IO pin. | |
(+) All ports have external interrupt/event capability. To use external interrupt | |
lines, the port must be configured in input mode. All available GPIO pins are | |
connected to the 16 external interrupt/event lines from EXTI0 to EXTI15. | |
(+) The external interrupt/event controller consists of up to 39 edge detectors | |
(16 lines are connected to GPIO) for generating event/interrupt requests (each | |
input line can be independently configured to select the type (interrupt or event) | |
and the corresponding trigger event (rising or falling or both). Each line can | |
also be masked independently. | |
##### How to use this driver ##### | |
============================================================================== | |
[..] | |
(#) Enable the GPIO AHB clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE(). | |
(#) Configure the GPIO pin(s) using HAL_GPIO_Init(). | |
(++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure | |
(++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef | |
structure. | |
(++) In case of Output or alternate function mode selection: the speed is | |
configured through "Speed" member from GPIO_InitTypeDef structure. | |
(++) In alternate mode is selection, the alternate function connected to the IO | |
is configured through "Alternate" member from GPIO_InitTypeDef structure. | |
(++) Analog mode is required when a pin is to be used as ADC channel | |
or DAC output. | |
(++) In case of external interrupt/event selection the "Mode" member from | |
GPIO_InitTypeDef structure select the type (interrupt or event) and | |
the corresponding trigger event (rising or falling or both). | |
(#) In case of external interrupt/event mode selection, configure NVIC IRQ priority | |
mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using | |
HAL_NVIC_EnableIRQ(). | |
(#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin(). | |
(#) To set/reset the level of a pin configured in output mode use | |
HAL_GPIO_WritePin()/HAL_GPIO_TogglePin(). | |
(#) To lock pin configuration until next reset use HAL_GPIO_LockPin(). | |
(#) During and just after reset, the alternate functions are not | |
active and the GPIO pins are configured in input floating mode (except JTAG | |
pins). | |
(#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose | |
(PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has | |
priority over the GPIO function. | |
(#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as | |
general purpose PH0 and PH1, respectively, when the HSE oscillator is off. | |
The HSE has priority over the GPIO function. | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© Copyright (c) 2017 STMicroelectronics. | |
* All rights reserved.</center></h2> | |
* | |
* This software component is licensed by ST under BSD 3-Clause license, | |
* the "License"; You may not use this file except in compliance with the | |
* License. You may obtain a copy of the License at: | |
* opensource.org/licenses/BSD-3-Clause | |
* | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32l4xx_hal.h" | |
/** @addtogroup STM32L4xx_HAL_Driver | |
* @{ | |
*/ | |
/** @defgroup GPIO GPIO | |
* @brief GPIO HAL module driver | |
* @{ | |
*/ | |
/** MISRA C:2012 deviation rule has been granted for following rules: | |
* Rule-12.2 - Medium: RHS argument is in interval [0,INF] which is out of | |
* range of the shift operator in following API : | |
* HAL_GPIO_Init | |
* HAL_GPIO_DeInit | |
*/ | |
#ifdef HAL_GPIO_MODULE_ENABLED | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private defines -----------------------------------------------------------*/ | |
/** @defgroup GPIO_Private_Defines GPIO Private Defines | |
* @{ | |
*/ | |
#define GPIO_MODE (0x00000003u) | |
#define ANALOG_MODE (0x00000008u) | |
#define EXTI_MODE (0x10000000u) | |
#define GPIO_MODE_IT (0x00010000u) | |
#define GPIO_MODE_EVT (0x00020000u) | |
#define RISING_EDGE (0x00100000u) | |
#define FALLING_EDGE (0x00200000u) | |
#define GPIO_OUTPUT_TYPE (0x00000010u) | |
#define GPIO_NUMBER (16u) | |
/** | |
* @} | |
*/ | |
/* Private macros ------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Exported functions --------------------------------------------------------*/ | |
/** @defgroup GPIO_Exported_Functions GPIO Exported Functions | |
* @{ | |
*/ | |
/** @defgroup GPIO_Exported_Functions_Group1 Initialization/de-initialization functions | |
* @brief Initialization and Configuration functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Initialization and de-initialization functions ##### | |
=============================================================================== | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Initialize the GPIOx peripheral according to the specified parameters in the GPIO_Init. | |
* @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family | |
* @param GPIO_Init: pointer to a GPIO_InitTypeDef structure that contains | |
* the configuration information for the specified GPIO peripheral. | |
* @retval None | |
*/ | |
void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_Init) | |
{ | |
uint32_t position = 0x00u; | |
uint32_t iocurrent; | |
uint32_t temp; | |
/* Check the parameters */ | |
assert_param(IS_GPIO_ALL_INSTANCE(GPIOx)); | |
assert_param(IS_GPIO_PIN(GPIO_Init->Pin)); | |
assert_param(IS_GPIO_MODE(GPIO_Init->Mode)); | |
assert_param(IS_GPIO_PULL(GPIO_Init->Pull)); | |
/* Configure the port pins */ | |
while (((GPIO_Init->Pin) >> position) != 0x00u) | |
{ | |
/* Get current io position */ | |
iocurrent = (GPIO_Init->Pin) & (1uL << position); | |
if (iocurrent != 0x00u) | |
{ | |
/*--------------------- GPIO Mode Configuration ------------------------*/ | |
/* In case of Alternate function mode selection */ | |
if((GPIO_Init->Mode == GPIO_MODE_AF_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_OD)) | |
{ | |
/* Check the Alternate function parameters */ | |
assert_param(IS_GPIO_AF_INSTANCE(GPIOx)); | |
assert_param(IS_GPIO_AF(GPIO_Init->Alternate)); | |
/* Configure Alternate function mapped with the current IO */ | |
temp = GPIOx->AFR[position >> 3u]; | |
temp &= ~(0xFu << ((position & 0x07u) * 4u)); | |
temp |= ((GPIO_Init->Alternate) << ((position & 0x07u) * 4u)); | |
GPIOx->AFR[position >> 3u] = temp; | |
} | |
/* Configure IO Direction mode (Input, Output, Alternate or Analog) */ | |
temp = GPIOx->MODER; | |
temp &= ~(GPIO_MODER_MODE0 << (position * 2u)); | |
temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * 2u)); | |
GPIOx->MODER = temp; | |
/* In case of Output or Alternate function mode selection */ | |
if((GPIO_Init->Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_PP) || | |
(GPIO_Init->Mode == GPIO_MODE_OUTPUT_OD) || (GPIO_Init->Mode == GPIO_MODE_AF_OD)) | |
{ | |
/* Check the Speed parameter */ | |
assert_param(IS_GPIO_SPEED(GPIO_Init->Speed)); | |
/* Configure the IO Speed */ | |
temp = GPIOx->OSPEEDR; | |
temp &= ~(GPIO_OSPEEDR_OSPEED0 << (position * 2u)); | |
temp |= (GPIO_Init->Speed << (position * 2u)); | |
GPIOx->OSPEEDR = temp; | |
/* Configure the IO Output Type */ | |
temp = GPIOx->OTYPER; | |
temp &= ~(GPIO_OTYPER_OT0 << position) ; | |
temp |= (((GPIO_Init->Mode & GPIO_OUTPUT_TYPE) >> 4u) << position); | |
GPIOx->OTYPER = temp; | |
} | |
#if defined(STM32L471xx) || defined(STM32L475xx) || defined(STM32L476xx) || defined(STM32L485xx) || defined(STM32L486xx) | |
/* In case of Analog mode, check if ADC control mode is selected */ | |
if((GPIO_Init->Mode & GPIO_MODE_ANALOG) == GPIO_MODE_ANALOG) | |
{ | |
/* Configure the IO Output Type */ | |
temp = GPIOx->ASCR; | |
temp &= ~(GPIO_ASCR_ASC0 << position) ; | |
temp |= (((GPIO_Init->Mode & ANALOG_MODE) >> 3) << position); | |
GPIOx->ASCR = temp; | |
} | |
#endif /* STM32L471xx || STM32L475xx || STM32L476xx || STM32L485xx || STM32L486xx */ | |
/* Activate the Pull-up or Pull down resistor for the current IO */ | |
temp = GPIOx->PUPDR; | |
temp &= ~(GPIO_PUPDR_PUPD0 << (position * 2u)); | |
temp |= ((GPIO_Init->Pull) << (position * 2u)); | |
GPIOx->PUPDR = temp; | |
/*--------------------- EXTI Mode Configuration ------------------------*/ | |
/* Configure the External Interrupt or event for the current IO */ | |
if((GPIO_Init->Mode & EXTI_MODE) == EXTI_MODE) | |
{ | |
/* Enable SYSCFG Clock */ | |
__HAL_RCC_SYSCFG_CLK_ENABLE(); | |
temp = SYSCFG->EXTICR[position >> 2u]; | |
temp &= ~(0x0FuL << (4u * (position & 0x03u))); | |
temp |= (GPIO_GET_INDEX(GPIOx) << (4u * (position & 0x03u))); | |
SYSCFG->EXTICR[position >> 2u] = temp; | |
/* Clear EXTI line configuration */ | |
temp = EXTI->IMR1; | |
temp &= ~(iocurrent); | |
if((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT) | |
{ | |
temp |= iocurrent; | |
} | |
EXTI->IMR1 = temp; | |
temp = EXTI->EMR1; | |
temp &= ~(iocurrent); | |
if((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT) | |
{ | |
temp |= iocurrent; | |
} | |
EXTI->EMR1 = temp; | |
/* Clear Rising Falling edge configuration */ | |
temp = EXTI->RTSR1; | |
temp &= ~(iocurrent); | |
if((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE) | |
{ | |
temp |= iocurrent; | |
} | |
EXTI->RTSR1 = temp; | |
temp = EXTI->FTSR1; | |
temp &= ~(iocurrent); | |
if((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE) | |
{ | |
temp |= iocurrent; | |
} | |
EXTI->FTSR1 = temp; | |
} | |
} | |
position++; | |
} | |
} | |
/** | |
* @brief De-initialize the GPIOx peripheral registers to their default reset values. | |
* @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family | |
* @param GPIO_Pin: specifies the port bit to be written. | |
* This parameter can be any combination of GPIO_Pin_x where x can be (0..15). | |
* @retval None | |
*/ | |
void HAL_GPIO_DeInit(GPIO_TypeDef *GPIOx, uint32_t GPIO_Pin) | |
{ | |
uint32_t position = 0x00u; | |
uint32_t iocurrent; | |
uint32_t tmp; | |
/* Check the parameters */ | |
assert_param(IS_GPIO_ALL_INSTANCE(GPIOx)); | |
assert_param(IS_GPIO_PIN(GPIO_Pin)); | |
/* Configure the port pins */ | |
while ((GPIO_Pin >> position) != 0x00u) | |
{ | |
/* Get current io position */ | |
iocurrent = (GPIO_Pin) & (1uL << position); | |
if (iocurrent != 0x00u) | |
{ | |
/*------------------------- EXTI Mode Configuration --------------------*/ | |
/* Clear the External Interrupt or Event for the current IO */ | |
tmp = SYSCFG->EXTICR[position >> 2u]; | |
tmp &= (0x0FuL << (4u * (position & 0x03u))); | |
if (tmp == (GPIO_GET_INDEX(GPIOx) << (4u * (position & 0x03u)))) | |
{ | |
/* Clear EXTI line configuration */ | |
EXTI->IMR1 &= ~(iocurrent); | |
EXTI->EMR1 &= ~(iocurrent); | |
/* Clear Rising Falling edge configuration */ | |
EXTI->RTSR1 &= ~(iocurrent); | |
EXTI->FTSR1 &= ~(iocurrent); | |
tmp = 0x0FuL << (4u * (position & 0x03u)); | |
SYSCFG->EXTICR[position >> 2u] &= ~tmp; | |
} | |
/*------------------------- GPIO Mode Configuration --------------------*/ | |
/* Configure IO in Analog Mode */ | |
GPIOx->MODER |= (GPIO_MODER_MODE0 << (position * 2u)); | |
/* Configure the default Alternate Function in current IO */ | |
GPIOx->AFR[position >> 3u] &= ~(0xFu << ((position & 0x07u) * 4u)) ; | |
/* Configure the default value for IO Speed */ | |
GPIOx->OSPEEDR &= ~(GPIO_OSPEEDR_OSPEED0 << (position * 2u)); | |
/* Configure the default value IO Output Type */ | |
GPIOx->OTYPER &= ~(GPIO_OTYPER_OT0 << position) ; | |
/* Deactivate the Pull-up and Pull-down resistor for the current IO */ | |
GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPD0 << (position * 2u)); | |
#if defined(STM32L471xx) || defined(STM32L475xx) || defined(STM32L476xx) || defined(STM32L485xx) || defined(STM32L486xx) | |
/* Deactivate the Control bit of Analog mode for the current IO */ | |
GPIOx->ASCR &= ~(GPIO_ASCR_ASC0<< position); | |
#endif /* STM32L471xx || STM32L475xx || STM32L476xx || STM32L485xx || STM32L486xx */ | |
} | |
position++; | |
} | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup GPIO_Exported_Functions_Group2 IO operation functions | |
* @brief GPIO Read, Write, Toggle, Lock and EXTI management functions. | |
* | |
@verbatim | |
=============================================================================== | |
##### IO operation functions ##### | |
=============================================================================== | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Read the specified input port pin. | |
* @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family | |
* @param GPIO_Pin: specifies the port bit to read. | |
* This parameter can be any combination of GPIO_Pin_x where x can be (0..15). | |
* @retval The input port pin value. | |
*/ | |
GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) | |
{ | |
GPIO_PinState bitstatus; | |
/* Check the parameters */ | |
assert_param(IS_GPIO_PIN(GPIO_Pin)); | |
if ((GPIOx->IDR & GPIO_Pin) != 0x00u) | |
{ | |
bitstatus = GPIO_PIN_SET; | |
} | |
else | |
{ | |
bitstatus = GPIO_PIN_RESET; | |
} | |
return bitstatus; | |
} | |
/** | |
* @brief Set or clear the selected data port bit. | |
* | |
* @note This function uses GPIOx_BSRR and GPIOx_BRR registers to allow atomic read/modify | |
* accesses. In this way, there is no risk of an IRQ occurring between | |
* the read and the modify access. | |
* | |
* @param GPIOx where x can be (A..H) to select the GPIO peripheral for STM32L4 family | |
* @param GPIO_Pin specifies the port bit to be written. | |
* This parameter can be any combination of GPIO_Pin_x where x can be (0..15). | |
* @param PinState specifies the value to be written to the selected bit. | |
* This parameter can be one of the GPIO_PinState enum values: | |
* @arg GPIO_PIN_RESET: to clear the port pin | |
* @arg GPIO_PIN_SET: to set the port pin | |
* @retval None | |
*/ | |
void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_GPIO_PIN(GPIO_Pin)); | |
assert_param(IS_GPIO_PIN_ACTION(PinState)); | |
if(PinState != GPIO_PIN_RESET) | |
{ | |
GPIOx->BSRR = (uint32_t)GPIO_Pin; | |
} | |
else | |
{ | |
GPIOx->BRR = (uint32_t)GPIO_Pin; | |
} | |
} | |
/** | |
* @brief Toggle the specified GPIO pin. | |
* @param GPIOx where x can be (A..H) to select the GPIO peripheral for STM32L4 family | |
* @param GPIO_Pin specifies the pin to be toggled. | |
* @retval None | |
*/ | |
void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_GPIO_PIN(GPIO_Pin)); | |
if ((GPIOx->ODR & GPIO_Pin) != 0x00u) | |
{ | |
GPIOx->BRR = (uint32_t)GPIO_Pin; | |
} | |
else | |
{ | |
GPIOx->BSRR = (uint32_t)GPIO_Pin; | |
} | |
} | |
/** | |
* @brief Lock GPIO Pins configuration registers. | |
* @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR, | |
* GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH. | |
* @note The configuration of the locked GPIO pins can no longer be modified | |
* until the next reset. | |
* @param GPIOx where x can be (A..H) to select the GPIO peripheral for STM32L4 family | |
* @param GPIO_Pin specifies the port bits to be locked. | |
* This parameter can be any combination of GPIO_Pin_x where x can be (0..15). | |
* @retval None | |
*/ | |
HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) | |
{ | |
__IO uint32_t tmp = GPIO_LCKR_LCKK; | |
/* Check the parameters */ | |
assert_param(IS_GPIO_LOCK_INSTANCE(GPIOx)); | |
assert_param(IS_GPIO_PIN(GPIO_Pin)); | |
/* Apply lock key write sequence */ | |
tmp |= GPIO_Pin; | |
/* Set LCKx bit(s): LCKK='1' + LCK[15-0] */ | |
GPIOx->LCKR = tmp; | |
/* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */ | |
GPIOx->LCKR = GPIO_Pin; | |
/* Set LCKx bit(s): LCKK='1' + LCK[15-0] */ | |
GPIOx->LCKR = tmp; | |
/* Read LCKK register. This read is mandatory to complete key lock sequence */ | |
tmp = GPIOx->LCKR; | |
/* Read again in order to confirm lock is active */ | |
if ((GPIOx->LCKR & GPIO_LCKR_LCKK) != 0x00u) | |
{ | |
return HAL_OK; | |
} | |
else | |
{ | |
return HAL_ERROR; | |
} | |
} | |
/** | |
* @brief Handle EXTI interrupt request. | |
* @param GPIO_Pin Specifies the port pin connected to corresponding EXTI line. | |
* @retval None | |
*/ | |
void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin) | |
{ | |
/* EXTI line interrupt detected */ | |
if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != 0x00u) | |
{ | |
__HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin); | |
HAL_GPIO_EXTI_Callback(GPIO_Pin); | |
} | |
} | |
/** | |
* @brief EXTI line detection callback. | |
* @param GPIO_Pin: Specifies the port pin connected to corresponding 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 */ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |