stm32f10x_gpio.c
上传用户:yj_qqy
上传日期:2017-01-28
资源大小:2911k
文件大小:22k
- /******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
- * File Name : stm32f10x_gpio.c
- * Author : MCD Application Team
- * Version : V2.0.2
- * Date : 07/11/2008
- * Description : This file provides all the GPIO firmware functions.
- ********************************************************************************
- * 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.
- *******************************************************************************/
- /* Includes ------------------------------------------------------------------*/
- #include "stm32f10x_gpio.h"
- #include "stm32f10x_rcc.h"
- /* Private typedef -----------------------------------------------------------*/
- /* Private define ------------------------------------------------------------*/
- /* ------------ RCC registers bit address in the alias region ----------- */
- #define AFIO_OFFSET (AFIO_BASE - PERIPH_BASE)
- /* --- EVENTCR Register ---*/
- /* Alias word address of EVOE bit */
- #define EVCR_OFFSET (AFIO_OFFSET + 0x00)
- #define EVOE_BitNumber ((u8)0x07)
- #define EVCR_EVOE_BB (PERIPH_BB_BASE + (EVCR_OFFSET * 32) + (EVOE_BitNumber * 4))
- #define EVCR_PORTPINCONFIG_MASK ((u16)0xFF80)
- #define LSB_MASK ((u16)0xFFFF)
- #define DBGAFR_POSITION_MASK ((u32)0x000F0000)
- #define DBGAFR_SWJCFG_MASK ((u32)0xF0FFFFFF)
- #define DBGAFR_LOCATION_MASK ((u32)0x00200000)
- #define DBGAFR_NUMBITS_MASK ((u32)0x00100000)
- /* Private macro -------------------------------------------------------------*/
- /* Private variables ---------------------------------------------------------*/
- /* Private function prototypes -----------------------------------------------*/
- /* Private functions ---------------------------------------------------------*/
- /*******************************************************************************
- * Function Name : GPIO_DeInit
- * Description : Deinitializes the GPIOx peripheral registers to their default
- * reset values.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_DeInit(GPIO_TypeDef* GPIOx)
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
-
- switch (*(u32*)&GPIOx)
- {
- case GPIOA_BASE:
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, DISABLE);
- break;
- case GPIOB_BASE:
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, DISABLE);
- break;
- case GPIOC_BASE:
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, DISABLE);
- break;
- case GPIOD_BASE:
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, DISABLE);
- break;
-
- case GPIOE_BASE:
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, DISABLE);
- break;
- case GPIOF_BASE:
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, DISABLE);
- break;
- case GPIOG_BASE:
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, DISABLE);
- break;
- default:
- break;
- }
- }
- /*******************************************************************************
- * Function Name : GPIO_AFIODeInit
- * Description : Deinitializes the Alternate Functions (remap, event control
- * and EXTI configuration) registers to their default reset
- * values.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_AFIODeInit(void)
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, DISABLE);
- }
- /*******************************************************************************
- * Function Name : GPIO_Init
- * Description : Initializes the GPIOx peripheral according to the specified
- * parameters in the GPIO_InitStruct.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * - GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
- * contains the configuration information for the specified GPIO
- * peripheral.
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
- {
- u32 currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
- u32 tmpreg = 0x00, pinmask = 0x00;
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
- assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
- assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
-
- /*---------------------------- GPIO Mode Configuration -----------------------*/
- currentmode = ((u32)GPIO_InitStruct->GPIO_Mode) & ((u32)0x0F);
- if ((((u32)GPIO_InitStruct->GPIO_Mode) & ((u32)0x10)) != 0x00)
- {
- /* Check the parameters */
- assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
- /* Output mode */
- currentmode |= (u32)GPIO_InitStruct->GPIO_Speed;
- }
- /*---------------------------- GPIO CRL Configuration ------------------------*/
- /* Configure the eight low port pins */
- if (((u32)GPIO_InitStruct->GPIO_Pin & ((u32)0x00FF)) != 0x00)
- {
- tmpreg = GPIOx->CRL;
- for (pinpos = 0x00; pinpos < 0x08; pinpos++)
- {
- pos = ((u32)0x01) << pinpos;
- /* Get the port pins position */
- currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
- if (currentpin == pos)
- {
- pos = pinpos << 2;
- /* Clear the corresponding low control register bits */
- pinmask = ((u32)0x0F) << pos;
- tmpreg &= ~pinmask;
- /* Write the mode configuration in the corresponding bits */
- tmpreg |= (currentmode << pos);
- /* Reset the corresponding ODR bit */
- if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
- {
- GPIOx->BRR = (((u32)0x01) << pinpos);
- }
- else
- {
- /* Set the corresponding ODR bit */
- if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
- {
- GPIOx->BSRR = (((u32)0x01) << pinpos);
- }
- }
- }
- }
- GPIOx->CRL = tmpreg;
- }
- /*---------------------------- GPIO CRH Configuration ------------------------*/
- /* Configure the eight high port pins */
- if (GPIO_InitStruct->GPIO_Pin > 0x00FF)
- {
- tmpreg = GPIOx->CRH;
- for (pinpos = 0x00; pinpos < 0x08; pinpos++)
- {
- pos = (((u32)0x01) << (pinpos + 0x08));
- /* Get the port pins position */
- currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos);
- if (currentpin == pos)
- {
- pos = pinpos << 2;
- /* Clear the corresponding high control register bits */
- pinmask = ((u32)0x0F) << pos;
- tmpreg &= ~pinmask;
- /* Write the mode configuration in the corresponding bits */
- tmpreg |= (currentmode << pos);
- /* Reset the corresponding ODR bit */
- if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
- {
- GPIOx->BRR = (((u32)0x01) << (pinpos + 0x08));
- }
- /* Set the corresponding ODR bit */
- if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
- {
- GPIOx->BSRR = (((u32)0x01) << (pinpos + 0x08));
- }
- }
- }
- GPIOx->CRH = tmpreg;
- }
- }
- /*******************************************************************************
- * Function Name : GPIO_StructInit
- * Description : Fills each GPIO_InitStruct member with its default value.
- * Input : - GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure
- * which will be initialized.
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct)
- {
- /* Reset GPIO init structure parameters values */
- GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All;
- GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN_FLOATING;
- }
- /*******************************************************************************
- * Function Name : GPIO_ReadInputDataBit
- * Description : Reads the specified input port pin.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * : - GPIO_Pin: specifies the port bit to read.
- * This parameter can be GPIO_Pin_x where x can be (0..15).
- * Output : None
- * Return : The input port pin value.
- *******************************************************************************/
- u8 GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
- {
- u8 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) != (u32)Bit_RESET)
- {
- bitstatus = (u8)Bit_SET;
- }
- else
- {
- bitstatus = (u8)Bit_RESET;
- }
- return bitstatus;
- }
- /*******************************************************************************
- * Function Name : GPIO_ReadInputData
- * Description : Reads the specified GPIO input data port.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * Output : None
- * Return : GPIO input data port value.
- *******************************************************************************/
- u16 GPIO_ReadInputData(GPIO_TypeDef* GPIOx)
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
-
- return ((u16)GPIOx->IDR);
- }
- /*******************************************************************************
- * Function Name : GPIO_ReadOutputDataBit
- * Description : Reads the specified output data port bit.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * : - GPIO_Pin: specifies the port bit to read.
- * This parameter can be GPIO_Pin_x where x can be (0..15).
- * Output : None
- * Return : The output port pin value.
- *******************************************************************************/
- u8 GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
- {
- u8 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) != (u32)Bit_RESET)
- {
- bitstatus = (u8)Bit_SET;
- }
- else
- {
- bitstatus = (u8)Bit_RESET;
- }
- return bitstatus;
- }
- /*******************************************************************************
- * Function Name : GPIO_ReadOutputData
- * Description : Reads the specified GPIO output data port.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * Output : None
- * Return : GPIO output data port value.
- *******************************************************************************/
- u16 GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
-
- return ((u16)GPIOx->ODR);
- }
- /*******************************************************************************
- * Function Name : GPIO_SetBits
- * Description : Sets the selected data port bits.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * - 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).
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_SetBits(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
- assert_param(IS_GPIO_PIN(GPIO_Pin));
-
- GPIOx->BSRR = GPIO_Pin;
- }
- /*******************************************************************************
- * Function Name : GPIO_ResetBits
- * Description : Clears the selected data port bits.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * - 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).
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_ResetBits(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
- assert_param(IS_GPIO_PIN(GPIO_Pin));
-
- GPIOx->BRR = GPIO_Pin;
- }
- /*******************************************************************************
- * Function Name : GPIO_WriteBit
- * Description : Sets or clears the selected data port bit.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * - GPIO_Pin: specifies the port bit to be written.
- * This parameter can be one of GPIO_Pin_x where x can be (0..15).
- * - BitVal: specifies the value to be written to the selected bit.
- * This parameter can be one of the BitAction enum values:
- * - Bit_RESET: to clear the port pin
- * - Bit_SET: to set the port pin
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_WriteBit(GPIO_TypeDef* GPIOx, u16 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;
- }
- }
- /*******************************************************************************
- * Function Name : GPIO_Write
- * Description : Writes data to the specified GPIO data port.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * - PortVal: specifies the value to be written to the port output
- * data register.
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_Write(GPIO_TypeDef* GPIOx, u16 PortVal)
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
-
- GPIOx->ODR = PortVal;
- }
- /*******************************************************************************
- * Function Name : GPIO_PinLockConfig
- * Description : Locks GPIO Pins configuration registers.
- * Input : - GPIOx: where x can be (A..G) to select the GPIO peripheral.
- * - 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).
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
- {
- u32 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;
- }
- /*******************************************************************************
- * Function Name : GPIO_EventOutputConfig
- * Description : Selects the GPIO pin used as Event output.
- * Input : - GPIO_PortSource: selects the GPIO port to be used as source
- * for Event output.
- * This parameter can be GPIO_PortSourceGPIOx where x can be
- * (A..E).
- * - GPIO_PinSource: specifies the pin for the Event output.
- * This parameter can be GPIO_PinSourcex where x can be (0..15).
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_EventOutputConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
- {
- u32 tmpreg = 0x00;
- /* Check the parameters */
- assert_param(IS_GPIO_EVENTOUT_PORT_SOURCE(GPIO_PortSource));
- assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
-
- tmpreg = AFIO->EVCR;
- /* Clear the PORT[6:4] and PIN[3:0] bits */
- tmpreg &= EVCR_PORTPINCONFIG_MASK;
- tmpreg |= (u32)GPIO_PortSource << 0x04;
- tmpreg |= GPIO_PinSource;
- AFIO->EVCR = tmpreg;
- }
- /*******************************************************************************
- * Function Name : GPIO_EventOutputCmd
- * Description : Enables or disables the Event Output.
- * Input : - NewState: new state of the Event output.
- * This parameter can be: ENABLE or DISABLE.
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_EventOutputCmd(FunctionalState NewState)
- {
- /* Check the parameters */
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- *(vu32 *) EVCR_EVOE_BB = (u32)NewState;
- }
- /*******************************************************************************
- * Function Name : GPIO_PinRemapConfig
- * Description : Changes the mapping of the specified pin.
- * Input : - GPIO_Remap: selects the pin to remap.
- * This parameter can be one of the following values:
- * - GPIO_Remap_SPI1
- * - GPIO_Remap_I2C1
- * - GPIO_Remap_USART1
- * - GPIO_Remap_USART2
- * - GPIO_PartialRemap_USART3
- * - GPIO_FullRemap_USART3
- * - GPIO_PartialRemap_TIM1
- * - GPIO_FullRemap_TIM1
- * - GPIO_PartialRemap1_TIM2
- * - GPIO_PartialRemap2_TIM2
- * - GPIO_FullRemap_TIM2
- * - GPIO_PartialRemap_TIM3
- * - GPIO_FullRemap_TIM3
- * - GPIO_Remap_TIM4
- * - GPIO_Remap1_CAN
- * - GPIO_Remap2_CAN
- * - GPIO_Remap_PD01
- * - GPIO_Remap_TIM5CH4_LSI
- * - GPIO_Remap_ADC1_ETRGINJ
- * - GPIO_Remap_ADC1_ETRGREG
- * - GPIO_Remap_ADC2_ETRGINJ
- * - GPIO_Remap_ADC2_ETRGREG
- * - GPIO_Remap_SWJ_NoJTRST
- * - GPIO_Remap_SWJ_JTAGDisable
- * - GPIO_Remap_SWJ_Disable
- * - NewState: new state of the port pin remapping.
- * This parameter can be: ENABLE or DISABLE.
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_PinRemapConfig(u32 GPIO_Remap, FunctionalState NewState)
- {
- u32 tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;
- /* Check the parameters */
- assert_param(IS_GPIO_REMAP(GPIO_Remap));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- tmpreg = AFIO->MAPR;
- tmpmask = (GPIO_Remap & DBGAFR_POSITION_MASK) >> 0x10;
- tmp = GPIO_Remap & LSB_MASK;
- if ((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK))
- {
- tmpreg &= DBGAFR_SWJCFG_MASK;
- AFIO->MAPR &= DBGAFR_SWJCFG_MASK;
- }
- else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK)
- {
- tmp1 = ((u32)0x03) << tmpmask;
- tmpreg &= ~tmp1;
- tmpreg |= ~DBGAFR_SWJCFG_MASK;
- }
- else
- {
- tmpreg &= ~(tmp << ((GPIO_Remap >> 0x15)*0x10));
- tmpreg |= ~DBGAFR_SWJCFG_MASK;
- }
- if (NewState != DISABLE)
- {
- tmpreg |= (tmp << ((GPIO_Remap >> 0x15)*0x10));
- }
- AFIO->MAPR = tmpreg;
- }
- /*******************************************************************************
- * Function Name : GPIO_EXTILineConfig
- * Description : Selects the GPIO pin used as EXTI Line.
- * Input : - GPIO_PortSource: selects the GPIO port to be used as
- * source for EXTI lines.
- * This parameter can be GPIO_PortSourceGPIOx where x can be
- * (A..G).
- * - GPIO_PinSource: specifies the EXTI line to be configured.
- * This parameter can be GPIO_PinSourcex where x can be (0..15).
- * Output : None
- * Return : None
- *******************************************************************************/
- void GPIO_EXTILineConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
- {
- u32 tmp = 0x00;
- /* Check the parameters */
- assert_param(IS_GPIO_EXTI_PORT_SOURCE(GPIO_PortSource));
- assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
-
- tmp = ((u32)0x0F) << (0x04 * (GPIO_PinSource & (u8)0x03));
- AFIO->EXTICR[GPIO_PinSource >> 0x02] &= ~tmp;
- AFIO->EXTICR[GPIO_PinSource >> 0x02] |= (((u32)GPIO_PortSource) << (0x04 * (GPIO_PinSource & (u8)0x03)));
- }
- /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/