541 lines
20 KiB
C
541 lines
20 KiB
C
|
/**
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||
|
******************************************************************************
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|
* @file stm32f0xx_gpio.c
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|
* @author MCD Application Team
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* @version V1.3.0
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* @date 16-January-2014
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* @brief This file provides firmware functions to manage the following
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|
* functionalities of the GPIO peripheral:
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* + Initialization and Configuration functions
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* + GPIO Read and Write functions
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* + GPIO Alternate functions configuration functions
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*
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* @verbatim
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*
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*
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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 RCC_AHBPeriphClockCmd()
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(#) Configure the GPIO pin(s) using GPIO_Init()
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Four possible configuration are available for each pin:
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(++) Input: Floating, Pull-up, Pull-down.
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(++) Output: Push-Pull (Pull-up, Pull-down or no Pull)
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Open Drain (Pull-up, Pull-down or no Pull).
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In output mode, the speed is configurable: Low, Medium, Fast or High.
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(++) Alternate Function: Push-Pull (Pull-up, Pull-down or no Pull)
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Open Drain (Pull-up, Pull-down or no Pull).
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(++) Analog: required mode when a pin is to be used as ADC channel,
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DAC output or comparator input.
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(#) Peripherals alternate function:
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(++) For ADC, DAC and comparators, configure the desired pin in analog
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mode using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AN
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(++) For other peripherals (TIM, USART...):
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(+++) Connect the pin to the desired peripherals' Alternate
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Function (AF) using GPIO_PinAFConfig() function. For PortC,
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PortD and PortF, no configuration is needed.
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(+++) Configure the desired pin in alternate function mode using
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GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
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(+++) Select the type, pull-up/pull-down and output speed via
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GPIO_PuPd, GPIO_OType and GPIO_Speed members
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(+++) Call GPIO_Init() function
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(#) To get the level of a pin configured in input mode use GPIO_ReadInputDataBit()
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(#) To set/reset the level of a pin configured in output mode use
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GPIO_SetBits()/GPIO_ResetBits()
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(#) During and just after reset, the alternate functions are not active and
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the GPIO pins are configured in input floating mode (except JTAG pins).
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(#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as
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general-purpose (PC14 and PC15, respectively) when the LSE oscillator
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is off. The LSE has priority over the GPIO function.
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(#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as general-purpose
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PD0 and PD1, respectively, when the HSE oscillator is off. The HSE has
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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 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f0xx_gpio.h"
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#include "stm32f0xx_rcc.h"
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|
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/** @addtogroup STM32F0xx_StdPeriph_Driver
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* @{
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*/
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|
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/** @defgroup GPIO
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* @brief GPIO driver modules
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* @{
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*/
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|
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup GPIO_Private_Functions
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* @{
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*/
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|
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/** @defgroup GPIO_Group1 Initialization and Configuration
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* @brief Initialization and Configuration
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*
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@verbatim
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===============================================================================
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##### Initialization and Configuration #####
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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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* @brief Deinitializes the GPIOx peripheral registers to their default reset
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* values.
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* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
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* @note GPIOE is available only for STM32F072.
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* @note GPIOD is not available for STM32F031.
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* @retval None
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*/
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void GPIO_DeInit(GPIO_TypeDef* GPIOx)
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{
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/* Check the parameters */
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assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
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|
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if(GPIOx == GPIOA)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, DISABLE);
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}
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else if(GPIOx == GPIOB)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, DISABLE);
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}
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else if(GPIOx == GPIOC)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, DISABLE);
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}
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else if(GPIOx == GPIOD)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, DISABLE);
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}
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else if(GPIOx == GPIOE)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, DISABLE);
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}
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else
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{
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if(GPIOx == GPIOF)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, DISABLE);
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}
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}
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}
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/**
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* @brief Initializes the GPIOx peripheral according to the specified
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* parameters in the GPIO_InitStruct.
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* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
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* @note GPIOE is available only for STM32F072.
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* @note GPIOD is not available for STM32F031.
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* @param GPIO_InitStruct: 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 GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
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{
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uint32_t pinpos = 0x00, pos = 0x00 , currentpin = 0x00;
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/* Check the parameters */
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assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
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assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
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assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
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assert_param(IS_GPIO_PUPD(GPIO_InitStruct->GPIO_PuPd));
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/*-------------------------- Configure the port pins -----------------------*/
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/*-- GPIO Mode Configuration --*/
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for (pinpos = 0x00; pinpos < 0x10; pinpos++)
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{
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pos = ((uint32_t)0x01) << pinpos;
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/* Get the port pins position */
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currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
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if (currentpin == pos)
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{
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if ((GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT) || (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF))
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{
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/* Check Speed mode parameters */
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assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
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/* Speed mode configuration */
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (pinpos * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_InitStruct->GPIO_Speed) << (pinpos * 2));
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/* Check Output mode parameters */
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assert_param(IS_GPIO_OTYPE(GPIO_InitStruct->GPIO_OType));
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/* Output mode configuration */
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GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)pinpos));
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GPIOx->OTYPER |= (uint16_t)(((uint16_t)GPIO_InitStruct->GPIO_OType) << ((uint16_t)pinpos));
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}
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (pinpos * 2));
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GPIOx->MODER |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) << (pinpos * 2));
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/* Pull-up Pull down resistor configuration */
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)pinpos * 2));
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GPIOx->PUPDR |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2));
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}
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}
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}
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/**
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* @brief Fills each GPIO_InitStruct member with its default value.
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* @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure which will
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* be initialized.
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* @retval None
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*/
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void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct)
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{
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/* Reset GPIO init structure parameters values */
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GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All;
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GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN;
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GPIO_InitStruct->GPIO_Speed = GPIO_Speed_Level_2;
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GPIO_InitStruct->GPIO_OType = GPIO_OType_PP;
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GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL;
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}
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|
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|
/**
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* @brief Locks GPIO Pins configuration registers.
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* @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
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|
* GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
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|
* @note The configuration of the locked GPIO pins can no longer be modified
|
||
|
* until the next device reset.
|
||
|
* @param GPIOx: where x can be (A or B) to select the GPIO peripheral.
|
||
|
* @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 GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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|
{
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||
|
__IO uint32_t tmp = 0x00010000;
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|
|
||
|
/* Check the parameters */
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||
|
assert_param(IS_GPIO_LIST_PERIPH(GPIOx));
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|
assert_param(IS_GPIO_PIN(GPIO_Pin));
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|
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tmp |= GPIO_Pin;
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/* Set LCKK bit */
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GPIOx->LCKR = tmp;
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|
/* Reset LCKK bit */
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|
GPIOx->LCKR = GPIO_Pin;
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|
/* Set LCKK bit */
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GPIOx->LCKR = tmp;
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/* Read LCKK bit */
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tmp = GPIOx->LCKR;
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|
/* Read LCKK bit */
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|
tmp = GPIOx->LCKR;
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|
}
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||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/** @defgroup GPIO_Group2 GPIO Read and Write
|
||
|
* @brief GPIO Read and Write
|
||
|
*
|
||
|
@verbatim
|
||
|
===============================================================================
|
||
|
##### GPIO Read and Write #####
|
||
|
===============================================================================
|
||
|
|
||
|
@endverbatim
|
||
|
* @{
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @brief Reads the specified input port pin.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @param GPIO_Pin: specifies the port bit to read.
|
||
|
* @note This parameter can be GPIO_Pin_x where x can be:
|
||
|
* For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF.
|
||
|
* For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF.
|
||
|
* For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOF.
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||
|
* @retval The input port pin value.
|
||
|
*/
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|
uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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||
|
{
|
||
|
uint8_t bitstatus = 0x00;
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|
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||
|
/* Check the parameters */
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||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
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||
|
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
|
||
|
|
||
|
if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)Bit_RESET)
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||
|
{
|
||
|
bitstatus = (uint8_t)Bit_SET;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
bitstatus = (uint8_t)Bit_RESET;
|
||
|
}
|
||
|
return bitstatus;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief Reads the specified input port pin.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @retval The input port pin value.
|
||
|
*/
|
||
|
uint16_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx)
|
||
|
{
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
|
||
|
return ((uint16_t)GPIOx->IDR);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief Reads the specified output data port bit.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @param GPIO_Pin: Specifies the port bit to read.
|
||
|
* @note This parameter can be GPIO_Pin_x where x can be:
|
||
|
* For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF.
|
||
|
* For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF.
|
||
|
* For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOF.
|
||
|
* @retval The output port pin value.
|
||
|
*/
|
||
|
uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
|
||
|
{
|
||
|
uint8_t bitstatus = 0x00;
|
||
|
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
|
||
|
|
||
|
if ((GPIOx->ODR & GPIO_Pin) != (uint32_t)Bit_RESET)
|
||
|
{
|
||
|
bitstatus = (uint8_t)Bit_SET;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
bitstatus = (uint8_t)Bit_RESET;
|
||
|
}
|
||
|
return bitstatus;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief Reads the specified GPIO output data port.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @retval GPIO output data port value.
|
||
|
*/
|
||
|
uint16_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)
|
||
|
{
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
|
||
|
return ((uint16_t)GPIOx->ODR);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief Sets the selected data port bits.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @param GPIO_Pin: specifies the port bits to be written.
|
||
|
* @note This parameter can be GPIO_Pin_x where x can be:
|
||
|
* For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF.
|
||
|
* For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF.
|
||
|
* For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOF.
|
||
|
* @retval None
|
||
|
*/
|
||
|
void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
|
||
|
{
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
assert_param(IS_GPIO_PIN(GPIO_Pin));
|
||
|
|
||
|
GPIOx->BSRR = GPIO_Pin;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief Clears the selected data port bits.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @param GPIO_Pin: specifies the port bits to be written.
|
||
|
* @note This parameter can be GPIO_Pin_x where x can be:
|
||
|
* For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF.
|
||
|
* For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF.
|
||
|
* For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOF.
|
||
|
* @retval None
|
||
|
*/
|
||
|
void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
|
||
|
{
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
assert_param(IS_GPIO_PIN(GPIO_Pin));
|
||
|
|
||
|
GPIOx->BRR = GPIO_Pin;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief Sets or clears the selected data port bit.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @param GPIO_Pin: specifies the port bit to be written.
|
||
|
* @param BitVal: specifies the value to be written to the selected bit.
|
||
|
* This parameter can be one of the BitAction enumeration values:
|
||
|
* @arg Bit_RESET: to clear the port pin
|
||
|
* @arg Bit_SET: to set the port pin
|
||
|
* @note This parameter can be GPIO_Pin_x where x can be:
|
||
|
* For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF.
|
||
|
* For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF.
|
||
|
* For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOF.
|
||
|
* @retval None
|
||
|
*/
|
||
|
void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal)
|
||
|
{
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
|
||
|
assert_param(IS_GPIO_BIT_ACTION(BitVal));
|
||
|
|
||
|
if (BitVal != Bit_RESET)
|
||
|
{
|
||
|
GPIOx->BSRR = GPIO_Pin;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
GPIOx->BRR = GPIO_Pin ;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief Writes data to the specified GPIO data port.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOE is available only for STM32F072.
|
||
|
* @note GPIOD is not available for STM32F031.
|
||
|
* @param PortVal: specifies the value to be written to the port output data register.
|
||
|
* @retval None
|
||
|
*/
|
||
|
void GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal)
|
||
|
{
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
|
||
|
GPIOx->ODR = PortVal;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/** @defgroup GPIO_Group3 GPIO Alternate functions configuration functions
|
||
|
* @brief GPIO Alternate functions configuration functions
|
||
|
*
|
||
|
@verbatim
|
||
|
===============================================================================
|
||
|
##### GPIO Alternate functions configuration functions #####
|
||
|
===============================================================================
|
||
|
|
||
|
@endverbatim
|
||
|
* @{
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @brief Writes data to the specified GPIO data port.
|
||
|
* @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
|
||
|
* @note GPIOC, GPIOD, GPIOE and GPIOF are available only for STM32F072.
|
||
|
* @param GPIO_PinSource: specifies the pin for the Alternate function.
|
||
|
* This parameter can be GPIO_PinSourcex where x can be (0..15) for GPIOA, GPIOB, GPIOD, GPIOE
|
||
|
* and (0..12) for GPIOC and (0, 2..5, 9..10) for GPIOF.
|
||
|
* @param GPIO_AF: selects the pin to used as Alternate function.
|
||
|
* This parameter can be one of the following value:
|
||
|
* @arg GPIO_AF_0: WKUP, EVENTOUT, TIM15, SPI1, TIM17, MCO, SWDAT, SWCLK,
|
||
|
* TIM14, BOOT, USART1, CEC, IR_OUT, SPI2, TIM3, USART4,
|
||
|
* CAN, USART2, CRS, TIM16, TIM1, TS
|
||
|
* @arg GPIO_AF_1: USART2, CEC, TIM3, USART1, USART2, EVENTOUT, I2C1,
|
||
|
* I2C2, TIM15, SPI2, USART3, TS, SPI1
|
||
|
* @arg GPIO_AF_2: TIM2, TIM1, EVENTOUT, TIM16, TIM17, USB
|
||
|
* @arg GPIO_AF_3: TS, I2C1, TIM15, EVENTOUT
|
||
|
* @arg GPIO_AF_4: TIM14, USART4, USART3, CRS, CAN
|
||
|
* @arg GPIO_AF_5: TIM16, TIM17, TIM15, SPI2, I2C2
|
||
|
* @arg GPIO_AF_6: EVENTOUT
|
||
|
* @arg GPIO_AF_7: COMP1 OUT, COMP2 OUT
|
||
|
* @note The pin should already been configured in Alternate Function mode(AF)
|
||
|
* using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
|
||
|
* @note Refer to the Alternate function mapping table in the device datasheet
|
||
|
* for the detailed mapping of the system and peripherals'alternate
|
||
|
* function I/O pins.
|
||
|
* @retval None
|
||
|
*/
|
||
|
void GPIO_PinAFConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF)
|
||
|
{
|
||
|
uint32_t temp = 0x00;
|
||
|
uint32_t temp_2 = 0x00;
|
||
|
|
||
|
/* Check the parameters */
|
||
|
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
|
||
|
assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
|
||
|
assert_param(IS_GPIO_AF(GPIO_AF));
|
||
|
|
||
|
temp = ((uint32_t)(GPIO_AF) << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
|
||
|
GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
|
||
|
temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp;
|
||
|
GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|