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/**
******************************************************************************
* @file stm32l1xx_gpio.c
* @author MCD Application Team
* @version V1.0.0RC1
* @date 07/02/2010
* @brief This file provides all the GPIO firmware functions.
******************************************************************************
* @copy
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>&copy; COPYRIGHT 2010 STMicroelectronics</center></h2>
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l1xx_gpio.h"
#include "stm32l1xx_rcc.h"
/** @addtogroup STM32L1xx_StdPeriph_Driver
* @{
*/
/** @defgroup GPIO
* @brief GPIO driver modules
* @{
*/
/** @defgroup GPIO_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup GPIO_Private_Defines
* @{
*/
/**
* @}
*/
/** @defgroup GPIO_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup GPIO_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup GPIO_Private_FunctionPrototypes
* @{
*/
/**
* @}
*/
/** @defgroup GPIO_Private_Functions
* @{
*/
/**
* @brief Deinitializes the GPIOx peripheral registers to their default reset
* values.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @retval None
*/
void GPIO_DeInit(GPIO_TypeDef* GPIOx)
{
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
if(GPIOx == GPIOA)
{
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, DISABLE);
}
else if(GPIOx == GPIOB)
{
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, ENABLE);
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, DISABLE);
}
else if(GPIOx == GPIOC)
{
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, ENABLE);
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, DISABLE);
}
else if(GPIOx == GPIOD)
{
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, ENABLE);
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, DISABLE);
}
else if(GPIOx == GPIOE)
{
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, ENABLE);
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, DISABLE);
}
else
{
if(GPIOx == GPIOH)
{
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, ENABLE);
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, DISABLE);
}
}
}
/**
* @brief Initializes the GPIOx peripheral according to the specified
* parameters in the GPIO_InitStruct.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
* contains the configuration information for the specified GPIO
* peripheral.
* @retval None
*/
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
{
uint32_t pinpos = 0x00, pos = 0x00 , currentpin = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
assert_param(IS_GPIO_PUPD(GPIO_InitStruct->GPIO_PuPd));
/* -------------------------Configure the port pins---------------- */
/*-- GPIO Mode Configuration --*/
for (pinpos = 0x00; pinpos < 0x10; pinpos++)
{
pos = ((uint32_t)0x01) << pinpos;
/* Get the port pins position */
currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
if (currentpin == pos)
{
GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (pinpos * 2));
GPIOx->MODER |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) << (pinpos * 2));
if ((GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT) || (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF))
{
/*Check Speed mode parameters */
assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
/*Speed mode configuration */
GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (pinpos * 2));
GPIOx->OSPEEDR |= ((uint32_t)(GPIO_InitStruct->GPIO_Speed) << (pinpos * 2));
/*Check Output mode parameters */
assert_param(IS_GPIO_OTYPE(GPIO_InitStruct->GPIO_OType));
/* Output mode configuartion*/
GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)pinpos)) ;
GPIOx->OTYPER |= (uint16_t)(((uint16_t)GPIO_InitStruct->GPIO_OType) << ((uint16_t)pinpos));
}
/*Pull-up Pull down resistor configuration*/
GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)pinpos * 2));
GPIOx->PUPDR |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2));
}
}
}
/**
* @brief Fills each GPIO_InitStruct member with its default value.
* @param GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure which will
* be initialized.
* @retval None
*/
void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct)
{
/* Reset GPIO init structure parameters values */
GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All;
GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct->GPIO_Speed = GPIO_Speed_400KHz;
GPIO_InitStruct->GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL;
}
/**
* @brief Reads the specified input port pin.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @param GPIO_Pin: specifies the port bit to read.
* This parameter can be GPIO_Pin_x where x can be (0..15).
* @retval The input port pin value.
*/
uint8_t GPIO_ReadInputDataBit(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->IDR & GPIO_Pin) != (uint32_t)Bit_RESET)
{
bitstatus = (uint8_t)Bit_SET;
}
else
{
bitstatus = (uint8_t)Bit_RESET;
}
return bitstatus;
}
/**
* @brief Reads the specified GPIO input data port.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @retval GPIO input data port 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 H) to select the GPIO peripheral.
* @param GPIO_Pin: Specifies the port bit to read.
* This parameter can be GPIO_Pin_x where x can be (0..15).
* @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 H) to select the GPIO peripheral.
* @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 H) to select the GPIO peripheral.
* @param GPIO_Pin: specifies the port bits to be written.
* This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
* @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->BSRRL = GPIO_Pin;
}
/**
* @brief Clears the selected data port bits.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @param GPIO_Pin: specifies the port bits to be written.
* This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
* @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->BSRRH = GPIO_Pin;
}
/**
* @brief Sets or clears the selected data port bit.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @param GPIO_Pin: specifies the port bit to be written.
* This parameter can be one of GPIO_Pin_x where x can be (0..15).
* @param BitVal: specifies the value to be written to the selected bit.
* This parameter can be one of the BitAction enum values:
* @arg Bit_RESET: to clear the port pin
* @arg Bit_SET: to set the port pin
* @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->BSRRL = GPIO_Pin;
}
else
{
GPIOx->BSRRH = GPIO_Pin ;
}
}
/**
* @brief Writes data to the specified GPIO data port.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @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;
}
/**
* @brief Locks GPIO Pins configuration registers.
* @param GPIOx: where x can be (A, B, C, D, E or H) 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)
{
uint32_t tmp = 0x00010000;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_PIN(GPIO_Pin));
tmp |= GPIO_Pin;
/* Set LCKK bit */
GPIOx->LCKR = tmp;
/* Reset LCKK bit */
GPIOx->LCKR = GPIO_Pin;
/* Set LCKK bit */
GPIOx->LCKR = tmp;
/* Read LCKK bit*/
tmp = GPIOx->LCKR;
/* Read LCKK bit*/
tmp = GPIOx->LCKR;
}
/**
* @brief Changes the mapping of the specified pin.
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
* @param GPIO_PinSource: specifies the pin for the Alternate function.
* This parameter can be GPIO_PinSourcex where x can be (0..15).
* @param GPIO_AFSelection: selects the pin to used as Alternat function.
* This parameter can be one of the following values:
* @arg GPIO_AF_RTC_50Hz
* @arg GPIO_AF_MCO
* @arg GPIO_AF_TAMPER
* @arg GPIO_AF_WKUP
* @arg GPIO_AF_SWJ
* @arg GPIO_AF_TRACE
* @arg GPIO_AF_TIMESTAMP
* @arg GPIO_AF_CALIB
* @arg GPIO_AF_TIM2
* @arg GPIO_AF_TIM3
* @arg GPIO_AF_TIM4
* @arg GPIO_AF_TIM9
* @arg GPIO_AF_TIM10
* @arg GPIO_AF_TIM11
* @arg GPIO_AF_I2C1
* @arg GPIO_AF_I2C2
* @arg GPIO_AF_SPI1
* @arg GPIO_AF_SPI2
* @arg GPIO_AF_USART1
* @arg GPIO_AF_USART2
* @arg GPIO_AF_USART3
* @arg GPIO_AF_USB
* @arg GPIO_AF_LCD
* @arg GPIO_AF_RI
* @arg GPIO_AF_EVENTOUT
* @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 2010 STMicroelectronics *****END OF FILE****/