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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_gpio.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 610:813dcc80987e 1 /**
mbed_official 610:813dcc80987e 2 ******************************************************************************
mbed_official 610:813dcc80987e 3 * @file stm32l4xx_hal_gpio.c
mbed_official 610:813dcc80987e 4 * @author MCD Application Team
mbed_official 610:813dcc80987e 5 * @version V1.0.0
mbed_official 610:813dcc80987e 6 * @date 26-June-2015
mbed_official 610:813dcc80987e 7 * @brief GPIO HAL module driver.
mbed_official 610:813dcc80987e 8 * This file provides firmware functions to manage the following
mbed_official 610:813dcc80987e 9 * functionalities of the General Purpose Input/Output (GPIO) peripheral:
mbed_official 610:813dcc80987e 10 * + Initialization and de-initialization functions
mbed_official 610:813dcc80987e 11 * + IO operation functions
mbed_official 610:813dcc80987e 12 *
mbed_official 610:813dcc80987e 13 @verbatim
mbed_official 610:813dcc80987e 14 ==============================================================================
mbed_official 610:813dcc80987e 15 ##### GPIO Peripheral features #####
mbed_official 610:813dcc80987e 16 ==============================================================================
mbed_official 610:813dcc80987e 17 [..]
mbed_official 610:813dcc80987e 18 (+) Each port bit of the general-purpose I/O (GPIO) ports can be individually
mbed_official 610:813dcc80987e 19 configured by software in several modes:
mbed_official 610:813dcc80987e 20 (++) Input mode
mbed_official 610:813dcc80987e 21 (++) Analog mode
mbed_official 610:813dcc80987e 22 (++) Output mode
mbed_official 610:813dcc80987e 23 (++) Alternate function mode
mbed_official 610:813dcc80987e 24 (++) External interrupt/event lines
mbed_official 610:813dcc80987e 25
mbed_official 610:813dcc80987e 26 (+) During and just after reset, the alternate functions and external interrupt
mbed_official 610:813dcc80987e 27 lines are not active and the I/O ports are configured in input floating mode.
mbed_official 610:813dcc80987e 28
mbed_official 610:813dcc80987e 29 (+) All GPIO pins have weak internal pull-up and pull-down resistors, which can be
mbed_official 610:813dcc80987e 30 activated or not.
mbed_official 610:813dcc80987e 31
mbed_official 610:813dcc80987e 32 (+) In Output or Alternate mode, each IO can be configured on open-drain or push-pull
mbed_official 610:813dcc80987e 33 type and the IO speed can be selected depending on the VDD value.
mbed_official 610:813dcc80987e 34
mbed_official 610:813dcc80987e 35 (+) The microcontroller IO pins are connected to onboard peripherals/modules through a
mbed_official 610:813dcc80987e 36 multiplexer that allows only one peripheral alternate function (AF) connected
mbed_official 610:813dcc80987e 37 to an IO pin at a time. In this way, there can be no conflict between peripherals
mbed_official 610:813dcc80987e 38 sharing the same IO pin.
mbed_official 610:813dcc80987e 39
mbed_official 610:813dcc80987e 40 (+) All ports have external interrupt/event capability. To use external interrupt
mbed_official 610:813dcc80987e 41 lines, the port must be configured in input mode. All available GPIO pins are
mbed_official 610:813dcc80987e 42 connected to the 16 external interrupt/event lines from EXTI0 to EXTI15.
mbed_official 610:813dcc80987e 43
mbed_official 610:813dcc80987e 44 (+) The external interrupt/event controller consists of up to 39 edge detectors
mbed_official 610:813dcc80987e 45 (16 lines are connected to GPIO) for generating event/interrupt requests (each
mbed_official 610:813dcc80987e 46 input line can be independently configured to select the type (interrupt or event)
mbed_official 610:813dcc80987e 47 and the corresponding trigger event (rising or falling or both). Each line can
mbed_official 610:813dcc80987e 48 also be masked independently.
mbed_official 610:813dcc80987e 49
mbed_official 610:813dcc80987e 50 ##### How to use this driver #####
mbed_official 610:813dcc80987e 51 ==============================================================================
mbed_official 610:813dcc80987e 52 [..]
mbed_official 610:813dcc80987e 53 (#) Enable the GPIO AHB clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE().
mbed_official 610:813dcc80987e 54
mbed_official 610:813dcc80987e 55 (#) Configure the GPIO pin(s) using HAL_GPIO_Init().
mbed_official 610:813dcc80987e 56 (++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure
mbed_official 610:813dcc80987e 57 (++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef
mbed_official 610:813dcc80987e 58 structure.
mbed_official 610:813dcc80987e 59 (++) In case of Output or alternate function mode selection: the speed is
mbed_official 610:813dcc80987e 60 configured through "Speed" member from GPIO_InitTypeDef structure.
mbed_official 610:813dcc80987e 61 (++) In alternate mode is selection, the alternate function connected to the IO
mbed_official 610:813dcc80987e 62 is configured through "Alternate" member from GPIO_InitTypeDef structure.
mbed_official 610:813dcc80987e 63 (++) Analog mode is required when a pin is to be used as ADC channel
mbed_official 610:813dcc80987e 64 or DAC output.
mbed_official 610:813dcc80987e 65 (++) In case of external interrupt/event selection the "Mode" member from
mbed_official 610:813dcc80987e 66 GPIO_InitTypeDef structure select the type (interrupt or event) and
mbed_official 610:813dcc80987e 67 the corresponding trigger event (rising or falling or both).
mbed_official 610:813dcc80987e 68
mbed_official 610:813dcc80987e 69 (#) In case of external interrupt/event mode selection, configure NVIC IRQ priority
mbed_official 610:813dcc80987e 70 mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using
mbed_official 610:813dcc80987e 71 HAL_NVIC_EnableIRQ().
mbed_official 610:813dcc80987e 72
mbed_official 610:813dcc80987e 73 (#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin().
mbed_official 610:813dcc80987e 74
mbed_official 610:813dcc80987e 75 (#) To set/reset the level of a pin configured in output mode use
mbed_official 610:813dcc80987e 76 HAL_GPIO_WritePin()/HAL_GPIO_TogglePin().
mbed_official 610:813dcc80987e 77
mbed_official 610:813dcc80987e 78 (#) To lock pin configuration until next reset use HAL_GPIO_LockPin().
mbed_official 610:813dcc80987e 79
mbed_official 610:813dcc80987e 80 (#) During and just after reset, the alternate functions are not
mbed_official 610:813dcc80987e 81 active and the GPIO pins are configured in input floating mode (except JTAG
mbed_official 610:813dcc80987e 82 pins).
mbed_official 610:813dcc80987e 83
mbed_official 610:813dcc80987e 84 (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose
mbed_official 610:813dcc80987e 85 (PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has
mbed_official 610:813dcc80987e 86 priority over the GPIO function.
mbed_official 610:813dcc80987e 87
mbed_official 610:813dcc80987e 88 (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as
mbed_official 610:813dcc80987e 89 general purpose PH0 and PH1, respectively, when the HSE oscillator is off.
mbed_official 610:813dcc80987e 90 The HSE has priority over the GPIO function.
mbed_official 610:813dcc80987e 91
mbed_official 610:813dcc80987e 92 @endverbatim
mbed_official 610:813dcc80987e 93 ******************************************************************************
mbed_official 610:813dcc80987e 94 * @attention
mbed_official 610:813dcc80987e 95 *
mbed_official 610:813dcc80987e 96 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
mbed_official 610:813dcc80987e 97 *
mbed_official 610:813dcc80987e 98 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 610:813dcc80987e 99 * are permitted provided that the following conditions are met:
mbed_official 610:813dcc80987e 100 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 610:813dcc80987e 101 * this list of conditions and the following disclaimer.
mbed_official 610:813dcc80987e 102 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 610:813dcc80987e 103 * this list of conditions and the following disclaimer in the documentation
mbed_official 610:813dcc80987e 104 * and/or other materials provided with the distribution.
mbed_official 610:813dcc80987e 105 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 610:813dcc80987e 106 * may be used to endorse or promote products derived from this software
mbed_official 610:813dcc80987e 107 * without specific prior written permission.
mbed_official 610:813dcc80987e 108 *
mbed_official 610:813dcc80987e 109 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 610:813dcc80987e 110 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 610:813dcc80987e 111 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 610:813dcc80987e 112 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 610:813dcc80987e 113 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 610:813dcc80987e 114 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 610:813dcc80987e 115 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 610:813dcc80987e 116 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 610:813dcc80987e 117 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 610:813dcc80987e 118 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 610:813dcc80987e 119 *
mbed_official 610:813dcc80987e 120 ******************************************************************************
mbed_official 610:813dcc80987e 121 */
mbed_official 610:813dcc80987e 122
mbed_official 610:813dcc80987e 123 /* Includes ------------------------------------------------------------------*/
mbed_official 610:813dcc80987e 124 #include "stm32l4xx_hal.h"
mbed_official 610:813dcc80987e 125
mbed_official 610:813dcc80987e 126 /** @addtogroup STM32L4xx_HAL_Driver
mbed_official 610:813dcc80987e 127 * @{
mbed_official 610:813dcc80987e 128 */
mbed_official 610:813dcc80987e 129
mbed_official 610:813dcc80987e 130 /** @defgroup GPIO GPIO
mbed_official 610:813dcc80987e 131 * @brief GPIO HAL module driver
mbed_official 610:813dcc80987e 132 * @{
mbed_official 610:813dcc80987e 133 */
mbed_official 610:813dcc80987e 134
mbed_official 610:813dcc80987e 135 #ifdef HAL_GPIO_MODULE_ENABLED
mbed_official 610:813dcc80987e 136
mbed_official 610:813dcc80987e 137 /* Private typedef -----------------------------------------------------------*/
mbed_official 610:813dcc80987e 138 /* Private defines -----------------------------------------------------------*/
mbed_official 610:813dcc80987e 139 /** @defgroup GPIO_Private_Defines GPIO Private Defines
mbed_official 610:813dcc80987e 140 * @{
mbed_official 610:813dcc80987e 141 */
mbed_official 610:813dcc80987e 142 #define GPIO_MODE ((uint32_t)0x00000003)
mbed_official 610:813dcc80987e 143 #define ANALOG_MODE ((uint32_t)0x00000008)
mbed_official 610:813dcc80987e 144 #define EXTI_MODE ((uint32_t)0x10000000)
mbed_official 610:813dcc80987e 145 #define GPIO_MODE_IT ((uint32_t)0x00010000)
mbed_official 610:813dcc80987e 146 #define GPIO_MODE_EVT ((uint32_t)0x00020000)
mbed_official 610:813dcc80987e 147 #define RISING_EDGE ((uint32_t)0x00100000)
mbed_official 610:813dcc80987e 148 #define FALLING_EDGE ((uint32_t)0x00200000)
mbed_official 610:813dcc80987e 149 #define GPIO_OUTPUT_TYPE ((uint32_t)0x00000010)
mbed_official 610:813dcc80987e 150
mbed_official 610:813dcc80987e 151 #define GPIO_NUMBER ((uint32_t)16)
mbed_official 610:813dcc80987e 152 /**
mbed_official 610:813dcc80987e 153 * @}
mbed_official 610:813dcc80987e 154 */
mbed_official 610:813dcc80987e 155
mbed_official 610:813dcc80987e 156 /* Private macros ------------------------------------------------------------*/
mbed_official 610:813dcc80987e 157 /* Private macros ------------------------------------------------------------*/
mbed_official 610:813dcc80987e 158 /** @defgroup GPIO_Private_Macros GPIO Private Macros
mbed_official 610:813dcc80987e 159 * @{
mbed_official 610:813dcc80987e 160 */
mbed_official 610:813dcc80987e 161 /**
mbed_official 610:813dcc80987e 162 * @}
mbed_official 610:813dcc80987e 163 */
mbed_official 610:813dcc80987e 164 /* Private variables ---------------------------------------------------------*/
mbed_official 610:813dcc80987e 165 /* Private function prototypes -----------------------------------------------*/
mbed_official 610:813dcc80987e 166 /* Exported functions --------------------------------------------------------*/
mbed_official 610:813dcc80987e 167
mbed_official 610:813dcc80987e 168 /** @defgroup GPIO_Exported_Functions GPIO Exported Functions
mbed_official 610:813dcc80987e 169 * @{
mbed_official 610:813dcc80987e 170 */
mbed_official 610:813dcc80987e 171
mbed_official 610:813dcc80987e 172 /** @defgroup GPIO_Exported_Functions_Group1 Initialization/de-initialization functions
mbed_official 610:813dcc80987e 173 * @brief Initialization and Configuration functions
mbed_official 610:813dcc80987e 174 *
mbed_official 610:813dcc80987e 175 @verbatim
mbed_official 610:813dcc80987e 176 ===============================================================================
mbed_official 610:813dcc80987e 177 ##### Initialization and de-initialization functions #####
mbed_official 610:813dcc80987e 178 ===============================================================================
mbed_official 610:813dcc80987e 179
mbed_official 610:813dcc80987e 180 @endverbatim
mbed_official 610:813dcc80987e 181 * @{
mbed_official 610:813dcc80987e 182 */
mbed_official 610:813dcc80987e 183
mbed_official 610:813dcc80987e 184 /**
mbed_official 610:813dcc80987e 185 * @brief Initialize the GPIOx peripheral according to the specified parameters in the GPIO_Init.
mbed_official 610:813dcc80987e 186 * @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
mbed_official 610:813dcc80987e 187 * @param GPIO_Init: pointer to a GPIO_InitTypeDef structure that contains
mbed_official 610:813dcc80987e 188 * the configuration information for the specified GPIO peripheral.
mbed_official 610:813dcc80987e 189 * @retval None
mbed_official 610:813dcc80987e 190 */
mbed_official 610:813dcc80987e 191 void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_Init)
mbed_official 610:813dcc80987e 192 {
mbed_official 610:813dcc80987e 193 uint32_t position = 0x00;
mbed_official 610:813dcc80987e 194 uint32_t iocurrent = 0x00;
mbed_official 610:813dcc80987e 195 uint32_t temp = 0x00;
mbed_official 610:813dcc80987e 196
mbed_official 610:813dcc80987e 197 /* Check the parameters */
mbed_official 610:813dcc80987e 198 assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
mbed_official 610:813dcc80987e 199 assert_param(IS_GPIO_PIN(GPIO_Init->Pin));
mbed_official 610:813dcc80987e 200 assert_param(IS_GPIO_MODE(GPIO_Init->Mode));
mbed_official 610:813dcc80987e 201 assert_param(IS_GPIO_PULL(GPIO_Init->Pull));
mbed_official 610:813dcc80987e 202
mbed_official 610:813dcc80987e 203 /* Configure the port pins */
mbed_official 610:813dcc80987e 204 while (((GPIO_Init->Pin) >> position) != RESET)
mbed_official 610:813dcc80987e 205 {
mbed_official 610:813dcc80987e 206 /* Get current io position */
mbed_official 610:813dcc80987e 207 iocurrent = (GPIO_Init->Pin) & (1U << position);
mbed_official 610:813dcc80987e 208
mbed_official 610:813dcc80987e 209 if(iocurrent)
mbed_official 610:813dcc80987e 210 {
mbed_official 610:813dcc80987e 211 /*--------------------- GPIO Mode Configuration ------------------------*/
mbed_official 610:813dcc80987e 212 /* In case of Alternate function mode selection */
mbed_official 610:813dcc80987e 213 if((GPIO_Init->Mode == GPIO_MODE_AF_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
mbed_official 610:813dcc80987e 214 {
mbed_official 610:813dcc80987e 215 /* Check the Alternate function parameters */
mbed_official 610:813dcc80987e 216 assert_param(IS_GPIO_AF_INSTANCE(GPIOx));
mbed_official 610:813dcc80987e 217 assert_param(IS_GPIO_AF(GPIO_Init->Alternate));
mbed_official 610:813dcc80987e 218
mbed_official 610:813dcc80987e 219 /* Configure Alternate function mapped with the current IO */
mbed_official 610:813dcc80987e 220 temp = GPIOx->AFR[position >> 3];
mbed_official 610:813dcc80987e 221 temp &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
mbed_official 610:813dcc80987e 222 temp |= ((uint32_t)(GPIO_Init->Alternate) << (((uint32_t)position & (uint32_t)0x07) * 4));
mbed_official 610:813dcc80987e 223 GPIOx->AFR[position >> 3] = temp;
mbed_official 610:813dcc80987e 224 }
mbed_official 610:813dcc80987e 225
mbed_official 610:813dcc80987e 226 /* Configure IO Direction mode (Input, Output, Alternate or Analog) */
mbed_official 610:813dcc80987e 227 temp = GPIOx->MODER;
mbed_official 610:813dcc80987e 228 temp &= ~(GPIO_MODER_MODER0 << (position * 2));
mbed_official 610:813dcc80987e 229 temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * 2));
mbed_official 610:813dcc80987e 230 GPIOx->MODER = temp;
mbed_official 610:813dcc80987e 231
mbed_official 610:813dcc80987e 232 /* In case of Output or Alternate function mode selection */
mbed_official 610:813dcc80987e 233 if((GPIO_Init->Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_PP) ||
mbed_official 610:813dcc80987e 234 (GPIO_Init->Mode == GPIO_MODE_OUTPUT_OD) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
mbed_official 610:813dcc80987e 235 {
mbed_official 610:813dcc80987e 236 /* Check the Speed parameter */
mbed_official 610:813dcc80987e 237 assert_param(IS_GPIO_SPEED(GPIO_Init->Speed));
mbed_official 610:813dcc80987e 238 /* Configure the IO Speed */
mbed_official 610:813dcc80987e 239 temp = GPIOx->OSPEEDR;
mbed_official 610:813dcc80987e 240 temp &= ~(GPIO_OSPEEDER_OSPEEDR0 << (position * 2));
mbed_official 610:813dcc80987e 241 temp |= (GPIO_Init->Speed << (position * 2));
mbed_official 610:813dcc80987e 242 GPIOx->OSPEEDR = temp;
mbed_official 610:813dcc80987e 243
mbed_official 610:813dcc80987e 244 /* Configure the IO Output Type */
mbed_official 610:813dcc80987e 245 temp = GPIOx->OTYPER;
mbed_official 610:813dcc80987e 246 temp &= ~(GPIO_OTYPER_OT_0 << position) ;
mbed_official 610:813dcc80987e 247 temp |= (((GPIO_Init->Mode & GPIO_OUTPUT_TYPE) >> 4) << position);
mbed_official 610:813dcc80987e 248 GPIOx->OTYPER = temp;
mbed_official 610:813dcc80987e 249 }
mbed_official 610:813dcc80987e 250
mbed_official 610:813dcc80987e 251 /* In case of Analog mode, check if ADC control mode is selected */
mbed_official 610:813dcc80987e 252 if((GPIO_Init->Mode & GPIO_MODE_ANALOG) == GPIO_MODE_ANALOG)
mbed_official 610:813dcc80987e 253 {
mbed_official 610:813dcc80987e 254 /* Configure the IO Output Type */
mbed_official 610:813dcc80987e 255 temp = GPIOx->ASCR;
mbed_official 610:813dcc80987e 256 temp &= ~(GPIO_ASCR_EN_0 << position) ;
mbed_official 610:813dcc80987e 257 temp |= (((GPIO_Init->Mode & ANALOG_MODE) >> 3) << position);
mbed_official 610:813dcc80987e 258 GPIOx->ASCR = temp;
mbed_official 610:813dcc80987e 259 }
mbed_official 610:813dcc80987e 260
mbed_official 610:813dcc80987e 261 /* Activate the Pull-up or Pull down resistor for the current IO */
mbed_official 610:813dcc80987e 262 temp = GPIOx->PUPDR;
mbed_official 610:813dcc80987e 263 temp &= ~(GPIO_PUPDR_PUPDR0 << (position * 2));
mbed_official 610:813dcc80987e 264 temp |= ((GPIO_Init->Pull) << (position * 2));
mbed_official 610:813dcc80987e 265 GPIOx->PUPDR = temp;
mbed_official 610:813dcc80987e 266
mbed_official 610:813dcc80987e 267 /*--------------------- EXTI Mode Configuration ------------------------*/
mbed_official 610:813dcc80987e 268 /* Configure the External Interrupt or event for the current IO */
mbed_official 610:813dcc80987e 269 if((GPIO_Init->Mode & EXTI_MODE) == EXTI_MODE)
mbed_official 610:813dcc80987e 270 {
mbed_official 610:813dcc80987e 271 /* Enable SYSCFG Clock */
mbed_official 610:813dcc80987e 272 __HAL_RCC_SYSCFG_CLK_ENABLE();
mbed_official 610:813dcc80987e 273
mbed_official 610:813dcc80987e 274 temp = SYSCFG->EXTICR[position >> 2];
mbed_official 610:813dcc80987e 275 temp &= ~(((uint32_t)0x0F) << (4 * (position & 0x03)));
mbed_official 610:813dcc80987e 276 temp |= (GPIO_GET_INDEX(GPIOx) << (4 * (position & 0x03)));
mbed_official 610:813dcc80987e 277 SYSCFG->EXTICR[position >> 2] = temp;
mbed_official 610:813dcc80987e 278
mbed_official 610:813dcc80987e 279 /* Clear EXTI line configuration */
mbed_official 610:813dcc80987e 280 temp = EXTI->IMR1;
mbed_official 610:813dcc80987e 281 temp &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 282 if((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT)
mbed_official 610:813dcc80987e 283 {
mbed_official 610:813dcc80987e 284 temp |= iocurrent;
mbed_official 610:813dcc80987e 285 }
mbed_official 610:813dcc80987e 286 EXTI->IMR1 = temp;
mbed_official 610:813dcc80987e 287
mbed_official 610:813dcc80987e 288 temp = EXTI->EMR1;
mbed_official 610:813dcc80987e 289 temp &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 290 if((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT)
mbed_official 610:813dcc80987e 291 {
mbed_official 610:813dcc80987e 292 temp |= iocurrent;
mbed_official 610:813dcc80987e 293 }
mbed_official 610:813dcc80987e 294 EXTI->EMR1 = temp;
mbed_official 610:813dcc80987e 295
mbed_official 610:813dcc80987e 296 /* Clear Rising Falling edge configuration */
mbed_official 610:813dcc80987e 297 temp = EXTI->RTSR1;
mbed_official 610:813dcc80987e 298 temp &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 299 if((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE)
mbed_official 610:813dcc80987e 300 {
mbed_official 610:813dcc80987e 301 temp |= iocurrent;
mbed_official 610:813dcc80987e 302 }
mbed_official 610:813dcc80987e 303 EXTI->RTSR1 = temp;
mbed_official 610:813dcc80987e 304
mbed_official 610:813dcc80987e 305 temp = EXTI->FTSR1;
mbed_official 610:813dcc80987e 306 temp &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 307 if((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE)
mbed_official 610:813dcc80987e 308 {
mbed_official 610:813dcc80987e 309 temp |= iocurrent;
mbed_official 610:813dcc80987e 310 }
mbed_official 610:813dcc80987e 311 EXTI->FTSR1 = temp;
mbed_official 610:813dcc80987e 312 }
mbed_official 610:813dcc80987e 313 }
mbed_official 610:813dcc80987e 314
mbed_official 610:813dcc80987e 315 position++;
mbed_official 610:813dcc80987e 316 }
mbed_official 610:813dcc80987e 317 }
mbed_official 610:813dcc80987e 318
mbed_official 610:813dcc80987e 319 /**
mbed_official 610:813dcc80987e 320 * @brief De-initialize the GPIOx peripheral registers to their default reset values.
mbed_official 610:813dcc80987e 321 * @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
mbed_official 610:813dcc80987e 322 * @param GPIO_Pin: specifies the port bit to be written.
mbed_official 610:813dcc80987e 323 * This parameter can be one of GPIO_PIN_x where x can be (0..15).
mbed_official 610:813dcc80987e 324 * @retval None
mbed_official 610:813dcc80987e 325 */
mbed_official 610:813dcc80987e 326 void HAL_GPIO_DeInit(GPIO_TypeDef *GPIOx, uint32_t GPIO_Pin)
mbed_official 610:813dcc80987e 327 {
mbed_official 610:813dcc80987e 328 uint32_t position = 0x00;
mbed_official 610:813dcc80987e 329 uint32_t iocurrent = 0x00;
mbed_official 610:813dcc80987e 330 uint32_t tmp = 0x00;
mbed_official 610:813dcc80987e 331
mbed_official 610:813dcc80987e 332 /* Check the parameters */
mbed_official 610:813dcc80987e 333 assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
mbed_official 610:813dcc80987e 334 assert_param(IS_GPIO_PIN(GPIO_Pin));
mbed_official 610:813dcc80987e 335
mbed_official 610:813dcc80987e 336 /* Configure the port pins */
mbed_official 610:813dcc80987e 337 while ((GPIO_Pin >> position) != RESET)
mbed_official 610:813dcc80987e 338 {
mbed_official 610:813dcc80987e 339 /* Get current io position */
mbed_official 610:813dcc80987e 340 iocurrent = (GPIO_Pin) & (1U << position);
mbed_official 610:813dcc80987e 341
mbed_official 610:813dcc80987e 342 if (iocurrent)
mbed_official 610:813dcc80987e 343 {
mbed_official 610:813dcc80987e 344 /*------------------------- GPIO Mode Configuration --------------------*/
mbed_official 610:813dcc80987e 345 /* Configure IO in Analog Mode */
mbed_official 610:813dcc80987e 346 GPIOx->MODER |= (GPIO_MODER_MODER0 << (position * 2));
mbed_official 610:813dcc80987e 347
mbed_official 610:813dcc80987e 348 /* Configure the default Alternate Function in current IO */
mbed_official 610:813dcc80987e 349 GPIOx->AFR[position >> 3] &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
mbed_official 610:813dcc80987e 350
mbed_official 610:813dcc80987e 351 /* Configure the default value for IO Speed */
mbed_official 610:813dcc80987e 352 GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (position * 2));
mbed_official 610:813dcc80987e 353
mbed_official 610:813dcc80987e 354 /* Configure the default value IO Output Type */
mbed_official 610:813dcc80987e 355 GPIOx->OTYPER &= ~(GPIO_OTYPER_OT_0 << position) ;
mbed_official 610:813dcc80987e 356
mbed_official 610:813dcc80987e 357 /* Deactivate the Pull-up and Pull-down resistor for the current IO */
mbed_official 610:813dcc80987e 358 GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << (position * 2));
mbed_official 610:813dcc80987e 359
mbed_official 610:813dcc80987e 360 /* Deactivate the Control bit of Analog mode for the current IO */
mbed_official 610:813dcc80987e 361 GPIOx->ASCR &= ~(GPIO_ASCR_EN_0<< position);
mbed_official 610:813dcc80987e 362
mbed_official 610:813dcc80987e 363 /*------------------------- EXTI Mode Configuration --------------------*/
mbed_official 610:813dcc80987e 364 /* Clear the External Interrupt or Event for the current IO */
mbed_official 610:813dcc80987e 365
mbed_official 610:813dcc80987e 366 tmp = SYSCFG->EXTICR[position >> 2];
mbed_official 610:813dcc80987e 367 tmp &= (((uint32_t)0x0F) << (4 * (position & 0x03)));
mbed_official 610:813dcc80987e 368 if(tmp == (GPIO_GET_INDEX(GPIOx) << (4 * (position & 0x03))))
mbed_official 610:813dcc80987e 369 {
mbed_official 610:813dcc80987e 370 tmp = ((uint32_t)0x0F) << (4 * (position & 0x03));
mbed_official 610:813dcc80987e 371 SYSCFG->EXTICR[position >> 2] &= ~tmp;
mbed_official 610:813dcc80987e 372
mbed_official 610:813dcc80987e 373 /* Clear EXTI line configuration */
mbed_official 610:813dcc80987e 374 EXTI->IMR1 &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 375 EXTI->EMR1 &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 376
mbed_official 610:813dcc80987e 377 /* Clear Rising Falling edge configuration */
mbed_official 610:813dcc80987e 378 EXTI->RTSR1 &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 379 EXTI->FTSR1 &= ~((uint32_t)iocurrent);
mbed_official 610:813dcc80987e 380 }
mbed_official 610:813dcc80987e 381 }
mbed_official 610:813dcc80987e 382
mbed_official 610:813dcc80987e 383 position++;
mbed_official 610:813dcc80987e 384 }
mbed_official 610:813dcc80987e 385 }
mbed_official 610:813dcc80987e 386
mbed_official 610:813dcc80987e 387 /**
mbed_official 610:813dcc80987e 388 * @}
mbed_official 610:813dcc80987e 389 */
mbed_official 610:813dcc80987e 390
mbed_official 610:813dcc80987e 391 /** @defgroup GPIO_Exported_Functions_Group2 IO operation functions
mbed_official 610:813dcc80987e 392 * @brief GPIO Read, Write, Toggle, Lock and EXTI management functions.
mbed_official 610:813dcc80987e 393 *
mbed_official 610:813dcc80987e 394 @verbatim
mbed_official 610:813dcc80987e 395 ===============================================================================
mbed_official 610:813dcc80987e 396 ##### IO operation functions #####
mbed_official 610:813dcc80987e 397 ===============================================================================
mbed_official 610:813dcc80987e 398
mbed_official 610:813dcc80987e 399 @endverbatim
mbed_official 610:813dcc80987e 400 * @{
mbed_official 610:813dcc80987e 401 */
mbed_official 610:813dcc80987e 402
mbed_official 610:813dcc80987e 403 /**
mbed_official 610:813dcc80987e 404 * @brief Read the specified input port pin.
mbed_official 610:813dcc80987e 405 * @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
mbed_official 610:813dcc80987e 406 * @param GPIO_Pin: specifies the port bit to read.
mbed_official 610:813dcc80987e 407 * This parameter can be GPIO_PIN_x where x can be (0..15).
mbed_official 610:813dcc80987e 408 * @retval The input port pin value.
mbed_official 610:813dcc80987e 409 */
mbed_official 610:813dcc80987e 410 GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
mbed_official 610:813dcc80987e 411 {
mbed_official 610:813dcc80987e 412 GPIO_PinState bitstatus;
mbed_official 610:813dcc80987e 413
mbed_official 610:813dcc80987e 414 /* Check the parameters */
mbed_official 610:813dcc80987e 415 assert_param(IS_GPIO_PIN(GPIO_Pin));
mbed_official 610:813dcc80987e 416
mbed_official 610:813dcc80987e 417 if((GPIOx->IDR & GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
mbed_official 610:813dcc80987e 418 {
mbed_official 610:813dcc80987e 419 bitstatus = GPIO_PIN_SET;
mbed_official 610:813dcc80987e 420 }
mbed_official 610:813dcc80987e 421 else
mbed_official 610:813dcc80987e 422 {
mbed_official 610:813dcc80987e 423 bitstatus = GPIO_PIN_RESET;
mbed_official 610:813dcc80987e 424 }
mbed_official 610:813dcc80987e 425 return bitstatus;
mbed_official 610:813dcc80987e 426 }
mbed_official 610:813dcc80987e 427
mbed_official 610:813dcc80987e 428 /**
mbed_official 610:813dcc80987e 429 * @brief Set or clear the selected data port bit.
mbed_official 610:813dcc80987e 430 *
mbed_official 610:813dcc80987e 431 * @note This function uses GPIOx_BSRR and GPIOx_BRR registers to allow atomic read/modify
mbed_official 610:813dcc80987e 432 * accesses. In this way, there is no risk of an IRQ occurring between
mbed_official 610:813dcc80987e 433 * the read and the modify access.
mbed_official 610:813dcc80987e 434 *
mbed_official 610:813dcc80987e 435 * @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
mbed_official 610:813dcc80987e 436 * @param GPIO_Pin: specifies the port bit to be written.
mbed_official 610:813dcc80987e 437 * This parameter can be one of GPIO_PIN_x where x can be (0..15).
mbed_official 610:813dcc80987e 438 * @param PinState: specifies the value to be written to the selected bit.
mbed_official 610:813dcc80987e 439 * This parameter can be one of the GPIO_PinState enum values:
mbed_official 610:813dcc80987e 440 * @arg GPIO_PIN_RESET: to clear the port pin
mbed_official 610:813dcc80987e 441 * @arg GPIO_PIN_SET: to set the port pin
mbed_official 610:813dcc80987e 442 * @retval None
mbed_official 610:813dcc80987e 443 */
mbed_official 610:813dcc80987e 444 void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
mbed_official 610:813dcc80987e 445 {
mbed_official 610:813dcc80987e 446 /* Check the parameters */
mbed_official 610:813dcc80987e 447 assert_param(IS_GPIO_PIN(GPIO_Pin));
mbed_official 610:813dcc80987e 448 assert_param(IS_GPIO_PIN_ACTION(PinState));
mbed_official 610:813dcc80987e 449
mbed_official 610:813dcc80987e 450 if(PinState != GPIO_PIN_RESET)
mbed_official 610:813dcc80987e 451 {
mbed_official 610:813dcc80987e 452 GPIOx->BSRR = (uint32_t)GPIO_Pin;
mbed_official 610:813dcc80987e 453 }
mbed_official 610:813dcc80987e 454 else
mbed_official 610:813dcc80987e 455 {
mbed_official 610:813dcc80987e 456 GPIOx->BRR = (uint32_t)GPIO_Pin;
mbed_official 610:813dcc80987e 457 }
mbed_official 610:813dcc80987e 458 }
mbed_official 610:813dcc80987e 459
mbed_official 610:813dcc80987e 460 /**
mbed_official 610:813dcc80987e 461 * @brief Toggle the specified GPIO pin.
mbed_official 610:813dcc80987e 462 * @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
mbed_official 610:813dcc80987e 463 * @param GPIO_Pin: specifies the pin to be toggled.
mbed_official 610:813dcc80987e 464 * @retval None
mbed_official 610:813dcc80987e 465 */
mbed_official 610:813dcc80987e 466 void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
mbed_official 610:813dcc80987e 467 {
mbed_official 610:813dcc80987e 468 /* Check the parameters */
mbed_official 610:813dcc80987e 469 assert_param(IS_GPIO_PIN(GPIO_Pin));
mbed_official 610:813dcc80987e 470
mbed_official 610:813dcc80987e 471 GPIOx->ODR ^= GPIO_Pin;
mbed_official 610:813dcc80987e 472 }
mbed_official 610:813dcc80987e 473
mbed_official 610:813dcc80987e 474 /**
mbed_official 610:813dcc80987e 475 * @brief Lock GPIO Pins configuration registers.
mbed_official 610:813dcc80987e 476 * @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
mbed_official 610:813dcc80987e 477 * GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
mbed_official 610:813dcc80987e 478 * @note The configuration of the locked GPIO pins can no longer be modified
mbed_official 610:813dcc80987e 479 * until the next reset.
mbed_official 610:813dcc80987e 480 * @param GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
mbed_official 610:813dcc80987e 481 * @param GPIO_Pin: specifies the port bits to be locked.
mbed_official 610:813dcc80987e 482 * This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
mbed_official 610:813dcc80987e 483 * @retval None
mbed_official 610:813dcc80987e 484 */
mbed_official 610:813dcc80987e 485 HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
mbed_official 610:813dcc80987e 486 {
mbed_official 610:813dcc80987e 487 __IO uint32_t tmp = GPIO_LCKR_LCKK;
mbed_official 610:813dcc80987e 488
mbed_official 610:813dcc80987e 489 /* Check the parameters */
mbed_official 610:813dcc80987e 490 assert_param(IS_GPIO_LOCK_INSTANCE(GPIOx));
mbed_official 610:813dcc80987e 491 assert_param(IS_GPIO_PIN(GPIO_Pin));
mbed_official 610:813dcc80987e 492
mbed_official 610:813dcc80987e 493 /* Apply lock key write sequence */
mbed_official 610:813dcc80987e 494 tmp |= GPIO_Pin;
mbed_official 610:813dcc80987e 495 /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
mbed_official 610:813dcc80987e 496 GPIOx->LCKR = tmp;
mbed_official 610:813dcc80987e 497 /* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */
mbed_official 610:813dcc80987e 498 GPIOx->LCKR = GPIO_Pin;
mbed_official 610:813dcc80987e 499 /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
mbed_official 610:813dcc80987e 500 GPIOx->LCKR = tmp;
mbed_official 610:813dcc80987e 501 /* Read LCKK bit*/
mbed_official 610:813dcc80987e 502 tmp = GPIOx->LCKR;
mbed_official 610:813dcc80987e 503
mbed_official 610:813dcc80987e 504 if((GPIOx->LCKR & GPIO_LCKR_LCKK) != RESET)
mbed_official 610:813dcc80987e 505 {
mbed_official 610:813dcc80987e 506 return HAL_OK;
mbed_official 610:813dcc80987e 507 }
mbed_official 610:813dcc80987e 508 else
mbed_official 610:813dcc80987e 509 {
mbed_official 610:813dcc80987e 510 return HAL_ERROR;
mbed_official 610:813dcc80987e 511 }
mbed_official 610:813dcc80987e 512 }
mbed_official 610:813dcc80987e 513
mbed_official 610:813dcc80987e 514 /**
mbed_official 610:813dcc80987e 515 * @brief Handle EXTI interrupt request.
mbed_official 610:813dcc80987e 516 * @param GPIO_Pin: Specifies the port pin connected to corresponding EXTI line.
mbed_official 610:813dcc80987e 517 * @retval None
mbed_official 610:813dcc80987e 518 */
mbed_official 610:813dcc80987e 519 void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)
mbed_official 610:813dcc80987e 520 {
mbed_official 610:813dcc80987e 521 /* EXTI line interrupt detected */
mbed_official 610:813dcc80987e 522 if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET)
mbed_official 610:813dcc80987e 523 {
mbed_official 610:813dcc80987e 524 __HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin);
mbed_official 610:813dcc80987e 525 HAL_GPIO_EXTI_Callback(GPIO_Pin);
mbed_official 610:813dcc80987e 526 }
mbed_official 610:813dcc80987e 527 }
mbed_official 610:813dcc80987e 528
mbed_official 610:813dcc80987e 529 /**
mbed_official 610:813dcc80987e 530 * @brief EXTI line detection callback.
mbed_official 610:813dcc80987e 531 * @param GPIO_Pin: Specifies the port pin connected to corresponding EXTI line.
mbed_official 610:813dcc80987e 532 * @retval None
mbed_official 610:813dcc80987e 533 */
mbed_official 610:813dcc80987e 534 __weak void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
mbed_official 610:813dcc80987e 535 {
mbed_official 610:813dcc80987e 536 /* NOTE: This function should not be modified, when the callback is needed,
mbed_official 610:813dcc80987e 537 the HAL_GPIO_EXTI_Callback could be implemented in the user file
mbed_official 610:813dcc80987e 538 */
mbed_official 610:813dcc80987e 539 }
mbed_official 610:813dcc80987e 540
mbed_official 610:813dcc80987e 541 /**
mbed_official 610:813dcc80987e 542 * @}
mbed_official 610:813dcc80987e 543 */
mbed_official 610:813dcc80987e 544
mbed_official 610:813dcc80987e 545
mbed_official 610:813dcc80987e 546 /**
mbed_official 610:813dcc80987e 547 * @}
mbed_official 610:813dcc80987e 548 */
mbed_official 610:813dcc80987e 549
mbed_official 610:813dcc80987e 550 #endif /* HAL_GPIO_MODULE_ENABLED */
mbed_official 610:813dcc80987e 551 /**
mbed_official 610:813dcc80987e 552 * @}
mbed_official 610:813dcc80987e 553 */
mbed_official 610:813dcc80987e 554
mbed_official 610:813dcc80987e 555 /**
mbed_official 610:813dcc80987e 556 * @}
mbed_official 610:813dcc80987e 557 */
mbed_official 610:813dcc80987e 558
mbed_official 610:813dcc80987e 559 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/