/**
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******************************************************************************
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* @file stm8s_gpio.c
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* @author MCD Application Team
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* @version V2.3.0
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* @date 16-June-2017
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* @brief This file contains all the functions for the GPIO peripheral.
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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 "stm8s_gpio.h"
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/** @addtogroup STM8S_StdPeriph_Driver
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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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/* Public functions ----------------------------------------------------------*/
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/**
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* @addtogroup GPIO_Public_Functions
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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 values.
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* @param GPIOx: Select the GPIO peripheral number (x = A to I).
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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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GPIOx->ODR = GPIO_ODR_RESET_VALUE; /* Reset Output Data Register */
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GPIOx->DDR = GPIO_DDR_RESET_VALUE; /* Reset Data Direction Register */
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GPIOx->CR1 = GPIO_CR1_RESET_VALUE; /* Reset Control Register 1 */
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GPIOx->CR2 = GPIO_CR2_RESET_VALUE; /* Reset Control Register 2 */
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}
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/**
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* @brief Initializes the GPIOx according to the specified parameters.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @param GPIO_Pin : This parameter contains the pin number, it can be any value
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* of the @ref GPIO_Pin_TypeDef enumeration.
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* @param GPIO_Mode : This parameter can be a value of the
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* @ref GPIO_Mode_TypeDef enumeration.
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* @retval None
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*/
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void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_Pin_TypeDef GPIO_Pin, GPIO_Mode_TypeDef GPIO_Mode)
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{
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/*----------------------*/
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/* Check the parameters */
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/*----------------------*/
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assert_param(IS_GPIO_MODE_OK(GPIO_Mode));
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assert_param(IS_GPIO_PIN_OK(GPIO_Pin));
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/* Reset corresponding bit to GPIO_Pin in CR2 register */
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GPIOx->CR2 &= (uint8_t)(~(GPIO_Pin));
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/*-----------------------------*/
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/* Input/Output mode selection */
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/*-----------------------------*/
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if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x80) != (uint8_t)0x00) /* Output mode */
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{
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if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x10) != (uint8_t)0x00) /* High level */
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{
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GPIOx->ODR |= (uint8_t)GPIO_Pin;
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}
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else /* Low level */
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{
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GPIOx->ODR &= (uint8_t)(~(GPIO_Pin));
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}
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/* Set Output mode */
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GPIOx->DDR |= (uint8_t)GPIO_Pin;
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}
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else /* Input mode */
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{
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/* Set Input mode */
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GPIOx->DDR &= (uint8_t)(~(GPIO_Pin));
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}
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/*------------------------------------------------------------------------*/
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/* Pull-Up/Float (Input) or Push-Pull/Open-Drain (Output) modes selection */
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/*------------------------------------------------------------------------*/
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if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x40) != (uint8_t)0x00) /* Pull-Up or Push-Pull */
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{
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GPIOx->CR1 |= (uint8_t)GPIO_Pin;
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}
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else /* Float or Open-Drain */
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{
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GPIOx->CR1 &= (uint8_t)(~(GPIO_Pin));
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}
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/*-----------------------------------------------------*/
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/* Interrupt (Input) or Slope (Output) modes selection */
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/*-----------------------------------------------------*/
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if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x20) != (uint8_t)0x00) /* Interrupt or Slow slope */
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{
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GPIOx->CR2 |= (uint8_t)GPIO_Pin;
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}
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else /* No external interrupt or No slope control */
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{
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GPIOx->CR2 &= (uint8_t)(~(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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* @note The port must be configured in output mode.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @param PortVal : Specifies the value to be written to the port output
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* data register.
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* @retval None
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*/
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void GPIO_Write(GPIO_TypeDef* GPIOx, uint8_t PortVal)
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{
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GPIOx->ODR = PortVal;
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}
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/**
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* @brief Writes high level to the specified GPIO pins.
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* @note The port must be configured in output mode.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @param PortPins : Specifies the pins to be turned high to the port output.
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* data register.
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* @retval None
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*/
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void GPIO_WriteHigh(GPIO_TypeDef* GPIOx, GPIO_Pin_TypeDef PortPins)
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{
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GPIOx->ODR |= (uint8_t)PortPins;
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}
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/**
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* @brief Writes low level to the specified GPIO pins.
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* @note The port must be configured in output mode.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @param PortPins : Specifies the pins to be turned low to the port output.
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* data register.
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* @retval None
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*/
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void GPIO_WriteLow(GPIO_TypeDef* GPIOx, GPIO_Pin_TypeDef PortPins)
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{
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GPIOx->ODR &= (uint8_t)(~PortPins);
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}
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/**
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* @brief Writes reverse level to the specified GPIO pins.
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* @note The port must be configured in output mode.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @param PortPins : Specifies the pins to be reversed to the port output.
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* data register.
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* @retval None
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*/
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void GPIO_WriteReverse(GPIO_TypeDef* GPIOx, GPIO_Pin_TypeDef PortPins)
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{
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GPIOx->ODR ^= (uint8_t)PortPins;
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}
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/**
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* @brief Reads the specified GPIO output data port.
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* @note The port must be configured in input mode.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @retval GPIO output data port value.
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*/
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uint8_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)
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{
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return ((uint8_t)GPIOx->ODR);
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}
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/**
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* @brief Reads the specified GPIO input data port.
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* @note The port must be configured in input mode.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @retval GPIO input data port value.
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*/
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uint8_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx)
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{
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return ((uint8_t)GPIOx->IDR);
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}
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/**
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* @brief Reads the specified GPIO input data pin.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @param GPIO_Pin : Specifies the pin number.
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* @retval BitStatus : GPIO input pin status.
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*/
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BitStatus GPIO_ReadInputPin(GPIO_TypeDef* GPIOx, GPIO_Pin_TypeDef GPIO_Pin)
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{
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return ((BitStatus)(GPIOx->IDR & (uint8_t)GPIO_Pin));
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}
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/**
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* @brief Configures the external pull-up on GPIOx pins.
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* @param GPIOx : Select the GPIO peripheral number (x = A to I).
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* @param GPIO_Pin : Specifies the pin number
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* @param NewState : The new state of the pull up pin.
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* @retval None
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*/
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void GPIO_ExternalPullUpConfig(GPIO_TypeDef* GPIOx, GPIO_Pin_TypeDef GPIO_Pin, FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_GPIO_PIN_OK(GPIO_Pin));
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assert_param(IS_FUNCTIONALSTATE_OK(NewState));
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if (NewState != DISABLE) /* External Pull-Up Set*/
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{
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GPIOx->CR1 |= (uint8_t)GPIO_Pin;
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} else /* External Pull-Up Reset*/
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{
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GPIOx->CR1 &= (uint8_t)(~(GPIO_Pin));
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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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