546 lines
19 KiB
C
546 lines
19 KiB
C
/**
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******************************************************************************
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* @file stm32f30x_gpio.c
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* @author MCD Application Team
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* @version V1.2.3
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* @date 10-July-2015
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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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##### 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
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analog 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.
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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
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and 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
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oscillator 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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(PF0 and PF1 respectively) when the HSE oscillator is off. The HSE has
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the 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 2015 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 "stm32f30x_gpio.h"
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#include "stm32f30x_rcc.h"
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/** @addtogroup STM32F30x_StdPeriph_Driver
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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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/* 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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/** @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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@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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* @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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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 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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else if(GPIOx == GPIOG)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOG, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOG, DISABLE);
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}
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else
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{
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if(GPIOx == GPIOH)
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{
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, ENABLE);
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RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, 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, F, G or H) to select the GPIO peripheral.
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* @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
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* contains the configuration information for the specified GPIO
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* peripheral.
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* @note GPIO_Pin: selects the pin to be configured:
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* GPIO_Pin_0->GPIO_Pin_15 for GPIOA, GPIOB, GPIOC, GPIOD and GPIOE;
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* GPIO_Pin_0->GPIO_Pin_2, GPIO_Pin_4, GPIO_Pin_6, GPIO_Pin_9
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* and GPIO_Pin_10 for GPIOF.
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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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uint32_t tmpreg = 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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/* Use temporary variable to update PUPDR register configuration, to avoid
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unexpected transition in the GPIO pin configuration. */
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tmpreg = GPIOx->PUPDR;
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tmpreg &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)pinpos * 2));
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tmpreg |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2));
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GPIOx->PUPDR = tmpreg;
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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_2MHz;
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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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* @brief Locks GPIO Pins configuration registers.
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* The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
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* GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
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* @note The configuration of the locked GPIO pins can no longer be modified
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* until the next reset.
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* @param GPIOx: where x can be (A or B or D) to select the GPIO peripheral.
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* @param GPIO_Pin: specifies the port bit to be written.
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* This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
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* @retval None
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*/
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void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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{
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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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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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/**
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* @}
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*/
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/** @defgroup GPIO_Group2 GPIO Read and Write
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* @brief GPIO Read and Write
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*
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@verbatim
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===============================================================================
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##### GPIO Read and Write #####
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Reads the specified input port pin.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @param GPIO_Pin: specifies the port bit to read.
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* @note This parameter can be GPIO_Pin_x where x can be :
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* (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
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* (0..2, 4, 6, 9..10) for GPIOF.
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* @retval The input port pin value.
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*/
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uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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{
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uint8_t bitstatus = 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_GET_GPIO_PIN(GPIO_Pin));
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if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)Bit_RESET)
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{
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bitstatus = (uint8_t)Bit_SET;
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}
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else
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{
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bitstatus = (uint8_t)Bit_RESET;
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}
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return bitstatus;
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}
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/**
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* @brief Reads the specified input port pin.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @retval The input port pin value.
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*/
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uint16_t GPIO_ReadInputData(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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return ((uint16_t)GPIOx->IDR);
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}
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/**
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* @brief Reads the specified output data port bit.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @param GPIO_Pin: Specifies the port bit to read.
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* @note This parameter can be GPIO_Pin_x where x can be :
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* (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
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* (0..2, 4, 6, 9..10) for GPIOF.
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* @retval The output port pin value.
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*/
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uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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{
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uint8_t bitstatus = 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_GET_GPIO_PIN(GPIO_Pin));
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if ((GPIOx->ODR & GPIO_Pin) != (uint32_t)Bit_RESET)
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{
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bitstatus = (uint8_t)Bit_SET;
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}
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else
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{
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bitstatus = (uint8_t)Bit_RESET;
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}
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return bitstatus;
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}
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/**
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* @brief Reads the specified GPIO output data port.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @retval GPIO output data port value.
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*/
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uint16_t GPIO_ReadOutputData(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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return ((uint16_t)GPIOx->ODR);
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}
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/**
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* @brief Sets the selected data port bits.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @param GPIO_Pin: specifies the port bits to be written.
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* @note This parameter can be GPIO_Pin_x where x can be :
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* (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
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* (0..2, 4, 6, 9..10) for GPIOF.
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* @retval None
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*/
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void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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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_GPIO_PIN(GPIO_Pin));
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GPIOx->BSRR = GPIO_Pin;
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}
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/**
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* @brief Clears the selected data port bits.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @param GPIO_Pin: specifies the port bits to be written.
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* @note This parameter can be GPIO_Pin_x where x can be :
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* (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
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* (0..2, 4, 6, 9..10) for GPIOF.
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* @retval None
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*/
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void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
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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_GPIO_PIN(GPIO_Pin));
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GPIOx->BRR = GPIO_Pin;
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}
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/**
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* @brief Sets or clears the selected data port bit.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @param GPIO_Pin: specifies the port bit to be written.
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* @note This parameter can be GPIO_Pin_x where x can be :
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* (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
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* (0..2, 4, 6, 9..10) for GPIOF.
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* @param BitVal: specifies the value to be written to the selected bit.
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* This parameter can be one of the BitAction enumeration values:
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* @arg Bit_RESET: to clear the port pin
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* @arg Bit_SET: to set the port pin
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* @retval None
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*/
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void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal)
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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));
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assert_param(IS_GPIO_BIT_ACTION(BitVal));
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if (BitVal != Bit_RESET)
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{
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GPIOx->BSRR = GPIO_Pin;
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}
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else
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{
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GPIOx->BRR = GPIO_Pin ;
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}
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}
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/**
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* @brief Writes data to the specified GPIO data port.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @param PortVal: specifies the value to be written to the port output data
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* register.
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* @retval None
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*/
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void GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal)
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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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GPIOx->ODR = PortVal;
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}
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/**
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* @}
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*/
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/** @defgroup GPIO_Group3 GPIO Alternate functions configuration functions
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* @brief GPIO Alternate functions configuration functions
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*
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@verbatim
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===============================================================================
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##### GPIO Alternate functions configuration 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 Writes data to the specified GPIO data port.
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* @param GPIOx: where x can be (A, B, C, D, E, F, G or H) to select the GPIO peripheral.
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* @param GPIO_PinSource: specifies the pin for the Alternate function.
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* This parameter can be GPIO_PinSourcex where x can be (0..15).
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* @param GPIO_AF: selects the pin to be used as Alternate function.
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* This parameter can be one of the following value:
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* @arg GPIO_AF_0: JTCK-SWCLK, JTDI, JTDO/TRACESW0, JTMS-SWDAT, MCO, NJTRST,
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* TRACED, TRACECK.
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* @arg GPIO_AF_1: OUT, TIM2, TIM15, TIM16, TIM17.
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* @arg GPIO_AF_2: COMP1_OUT, TIM1, TIM2, TIM3, TIM4, TIM8, TIM15, TIM16.
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* @arg GPIO_AF_3: COMP7_OUT, TIM8, TIM15, Touch, HRTIM.
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* @arg GPIO_AF_4: I2C1, I2C2, TIM1, TIM8, TIM16, TIM17.
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* @arg GPIO_AF_5: IR_OUT, I2S2, I2S3, SPI1, SPI2, TIM8, USART4, USART5
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* @arg GPIO_AF_6: IR_OUT, I2S2, I2S3, SPI2, SPI3, TIM1, TIM8
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* @arg GPIO_AF_7: AOP2_OUT, CAN, COMP3_OUT, COMP5_OUT, COMP6_OUT, USART1,
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* USART2, USART3.
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* @arg GPIO_AF_8: COMP1_OUT, COMP2_OUT, COMP3_OUT, COMP4_OUT, COMP5_OUT,
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* COMP6_OUT.
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* @arg GPIO_AF_9: AOP4_OUT, CAN, TIM1, TIM8, TIM15.
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* @arg GPIO_AF_10: AOP1_OUT, AOP3_OUT, TIM2, TIM3, TIM4, TIM8, TIM17.
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* @arg GPIO_AF_11: TIM1, TIM8.
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* @arg GPIO_AF_12: TIM1, HRTIM.
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* @arg GPIO_AF_13: HRTIM, AOP2_OUT.
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* @arg GPIO_AF_14: USBDM, USBDP.
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* @arg GPIO_AF_15: OUT.
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* @note The pin should already been configured in Alternate Function mode(AF)
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* using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
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* @note Refer to the Alternate function mapping table in the device datasheet
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* for the detailed mapping of the system and peripherals alternate
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* function I/O pins.
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* @retval None
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*/
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void GPIO_PinAFConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF)
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{
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uint32_t temp = 0x00;
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uint32_t temp_2 = 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_SOURCE(GPIO_PinSource));
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assert_param(IS_GPIO_AF(GPIO_AF));
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temp = ((uint32_t)(GPIO_AF) << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
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GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
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temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp;
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GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2;
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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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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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