本帖最后由 liuda 于 2015-1-23 03:51 编辑
- /**
- ******************************************************************************
- * @file stm32f10x_gpio.c
- * @author MCD Application Team
- * @version V3.5.0
- * @date 11-March-2011
- * @brief This file provides all the GPIO firmware functions.
- ******************************************************************************
- * @attention
- *
- * 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>© COPYRIGHT 2011 STMicroelectronics</center></h2>
- ******************************************************************************
- */
- /* Includes ------------------------------------------------------------------*/
- #include "stm32f10x_gpio.h"
- #include "stm32f10x_rcc.h"
- /** @addtogroup STM32F10x_StdPeriph_Driver
- * @{
- */
- /** @defgroup GPIO
- * @brief GPIO driver modules
- * @{
- */
- /** @defgroup GPIO_Private_TypesDefinitions
- * @{
- */
- /**
- * @}
- */
- /** @defgroup GPIO_Private_Defines
- * @{
- */
- /* ------------ 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 ((uint8_t)0x07)
- #define EVCR_EVOE_BB (PERIPH_BB_BASE + (EVCR_OFFSET * 32) + (EVOE_BitNumber * 4))
- /* --- MAPR Register ---*/
- /* Alias word address of MII_RMII_SEL bit */
- #define MAPR_OFFSET (AFIO_OFFSET + 0x04)
- #define MII_RMII_SEL_BitNumber ((u8)0x17)
- #define MAPR_MII_RMII_SEL_BB (PERIPH_BB_BASE + (MAPR_OFFSET * 32) + (MII_RMII_SEL_BitNumber * 4))
- #define EVCR_PORTPINCONFIG_MASK ((uint16_t)0xFF80)
- #define LSB_MASK ((uint16_t)0xFFFF)
- #define DBGAFR_POSITION_MASK ((uint32_t)0x000F0000)
- #define DBGAFR_SWJCFG_MASK ((uint32_t)0xF0FFFFFF)
- #define DBGAFR_LOCATION_MASK ((uint32_t)0x00200000)
- #define DBGAFR_NUMBITS_MASK ((uint32_t)0x00100000)
- /**
- * @}
- */
- /** @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..G) to select the GPIO peripheral.
- * @retval None
- */
- void GPIO_DeInit(GPIO_TypeDef* GPIOx)//恢复GPIO的默认值;输入:GPIO端口
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));//参数有效性检测
-
- if (GPIOx == GPIOA)//GPIOA的寄存器设置恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, ENABLE);//先把复位寄存器置1
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, DISABLE);//再把恢复寄存器置0
- }
- else if (GPIOx == GPIOB)//GPIOB的寄存器设置恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, DISABLE);
- }
- else if (GPIOx == GPIOC)//GPIOC的寄存器设置恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, DISABLE);
- }
- else if (GPIOx == GPIOD)//GPIOD的寄存器设置恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, DISABLE);
- }
- else if (GPIOx == GPIOE)//GPIOE的寄存器设置恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, DISABLE);
- }
- else if (GPIOx == GPIOF)//GPIOF的寄存器设置恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, DISABLE);
- }
- else
- {
- if (GPIOx == GPIOG)//GPIOG的寄存器设置恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, DISABLE);
- }
- }
- }
- /**
- * @brief Deinitializes the Alternate Functions (remap, event control
- * and EXTI configuration) registers to their default reset values.
- * @param None
- * @retval None
- */
- void GPIO_AFIODeInit(void)//复用功能寄存器恢复到默认值
- {
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, ENABLE);
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, DISABLE);
- }
- /**
- * @brief Initializes the GPIOx peripheral according to the specified
- * parameters in the GPIO_InitStruct.
- * @param GPIOx: where x can be (A..G) 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
- */
- /*GPIO初始化函数;输入:需要初始化的GPIO端口,存放端口初始化信息的结构体指针*/
- void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)//GPIO初始化函数,调用此函数才是真正对GPIO初始化
- {
- uint32_t currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
- uint32_t tmpreg = 0x00, pinmask = 0x00;
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));//参数检测,检测参数是否有效
- assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
- assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
-
- /*---------------------------- GPIO Mode Configuration -----------------------*/
- currentmode = ((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x0F);
- if ((((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x10)) != 0x00)//如果是0x1n为输出模式,下面对其进行速度设置
- {
- /* Check the parameters */
- assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
- /* Output mode */
- currentmode |= (uint32_t)GPIO_InitStruct->GPIO_Speed; //速度设置
- }
- /*---------------------------- GPIO CRL Configuration ------------------------*/
- /* Configure the eight low port pins */
- if (((uint32_t)GPIO_InitStruct->GPIO_Pin & ((uint32_t)0x00FF)) != 0x00)//端口的低8位
- {
- tmpreg = GPIOx->CRL;
- for (pinpos = 0x00; pinpos < 0x08; pinpos++)
- {
- pos = ((uint32_t)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 = ((uint32_t)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)//下拉输入时清零输出数据寄存器(选为下拉)
- {
- GPIOx->BRR = (((uint32_t)0x01) << pinpos);
- }
- else
- {
- /* Set the corresponding ODR bit */
- if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)//上拉输入时置位输出数据寄存器(选为上拉)
- {
- GPIOx->BSRR = (((uint32_t)0x01) << pinpos);
- }
- }
- }
- }
- GPIOx->CRL = tmpreg;
- }
- /*---------------------------- GPIO CRH Configuration ------------------------*/
- /* Configure the eight high port pins */
- if (GPIO_InitStruct->GPIO_Pin > 0x00FF) //端口的高8位
- {
- tmpreg = GPIOx->CRH;
- for (pinpos = 0x00; pinpos < 0x08; pinpos++)
- {
- pos = (((uint32_t)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 = ((uint32_t)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 = (((uint32_t)0x01) << (pinpos + 0x08));
- }
- /* Set the corresponding ODR bit */
- if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
- {
- GPIOx->BSRR = (((uint32_t)0x01) << (pinpos + 0x08));
- }
- }
- }
- GPIOx->CRH = tmpreg;
- }
- }
- /**
- * @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)//对存放GPIO端口信息的结构体进行初始化,为所有端口浮空输入
- {
- /* 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;
- }
- /**
- * @brief Reads the specified input port pin.
- * @param GPIOx: where x can be (A..G) 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.
- */
- /*读取GPIO的一位输入值;输入:GPIO端口,端口的某位;返回:此位的读取值*/
- uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)//读取一个GPIO端口的一位输入值
- {
- 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..G) to select the GPIO peripheral.
- * @retval GPIO input data port value.
- */
- uint16_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx)//读取一个端口的输入数据
- {
- /* 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..G) 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)//读取一个端口的一位输出值
- {
- 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..G) to select the GPIO peripheral.
- * @retval GPIO output data port value.
- */
- uint16_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)//读取一个端口的输出值
- {
- /* 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..G) 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)//对一个端口的几位输出置位
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
- assert_param(IS_GPIO_PIN(GPIO_Pin));
-
- GPIOx->BSRR = GPIO_Pin;
- }
- /**
- * @brief Clears the selected data port bits.
- * @param GPIOx: where x can be (A..G) 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)//对一个端口的几位输出复位
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
- assert_param(IS_GPIO_PIN(GPIO_Pin));
-
- GPIOx->BRR = GPIO_Pin;
- }
- /**
- * @brief Sets or clears the selected data port bit.
- * @param GPIOx: where x can be (A..G) 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)//对一个端口的一位输出进行操作
- {
- /* Check the parameters */
- assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
- assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
- assert_param(IS_GPIO_BIT_ACTION(BitVal));
-
- if (BitVal != Bit_RESET)
- {
- GPIOx->BSRR = GPIO_Pin;
- }
- else
- {
- GPIOx->BRR = GPIO_Pin;
- }
- }
- /**
- * @brief Writes data to the specified GPIO data port.
- * @param GPIOx: where x can be (A..G) 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)//对一个端口的输出进行操作
- {
- /* 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..G) 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)//对一个端口的某些位的配置进行锁定
- {
- 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 Selects the GPIO pin used as Event output.
- * @param 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).
- * @param GPIO_PinSource: specifies the pin for the Event output.
- * This parameter can be GPIO_PinSourcex where x can be (0..15).
- * @retval None
- */
- void GPIO_EventOutputConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource)//端口的事件输出配置
- {
- uint32_t 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 |= (uint32_t)GPIO_PortSource << 0x04;
- tmpreg |= GPIO_PinSource;
- AFIO->EVCR = tmpreg;
- }
- /**
- * @brief Enables or disables the Event Output.
- * @param NewState: new state of the Event output.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
- void GPIO_EventOutputCmd(FunctionalState NewState)//使能或禁能事件输出
- {
- /* Check the parameters */
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- *(__IO uint32_t *) EVCR_EVOE_BB = (uint32_t)NewState;
- }
- /**
- * @brief Changes the mapping of the specified pin.
- * @param GPIO_Remap: selects the pin to remap.
- * This parameter can be one of the following values:
- * @arg GPIO_Remap_SPI1 : SPI1 Alternate Function mapping
- * @arg GPIO_Remap_I2C1 : I2C1 Alternate Function mapping
- * @arg GPIO_Remap_USART1 : USART1 Alternate Function mapping
- * @arg GPIO_Remap_USART2 : USART2 Alternate Function mapping
- * @arg GPIO_PartialRemap_USART3 : USART3 Partial Alternate Function mapping
- * @arg GPIO_FullRemap_USART3 : USART3 Full Alternate Function mapping
- * @arg GPIO_PartialRemap_TIM1 : TIM1 Partial Alternate Function mapping
- * @arg GPIO_FullRemap_TIM1 : TIM1 Full Alternate Function mapping
- * @arg GPIO_PartialRemap1_TIM2 : TIM2 Partial1 Alternate Function mapping
- * @arg GPIO_PartialRemap2_TIM2 : TIM2 Partial2 Alternate Function mapping
- * @arg GPIO_FullRemap_TIM2 : TIM2 Full Alternate Function mapping
- * @arg GPIO_PartialRemap_TIM3 : TIM3 Partial Alternate Function mapping
- * @arg GPIO_FullRemap_TIM3 : TIM3 Full Alternate Function mapping
- * @arg GPIO_Remap_TIM4 : TIM4 Alternate Function mapping
- * @arg GPIO_Remap1_CAN1 : CAN1 Alternate Function mapping
- * @arg GPIO_Remap2_CAN1 : CAN1 Alternate Function mapping
- * @arg GPIO_Remap_PD01 : PD01 Alternate Function mapping
- * @arg GPIO_Remap_TIM5CH4_LSI : LSI connected to TIM5 Channel4 input capture for calibration
- * @arg GPIO_Remap_ADC1_ETRGINJ : ADC1 External Trigger Injected Conversion remapping
- * @arg GPIO_Remap_ADC1_ETRGREG : ADC1 External Trigger Regular Conversion remapping
- * @arg GPIO_Remap_ADC2_ETRGINJ : ADC2 External Trigger Injected Conversion remapping
- * @arg GPIO_Remap_ADC2_ETRGREG : ADC2 External Trigger Regular Conversion remapping
- * @arg GPIO_Remap_ETH : Ethernet remapping (only for Connectivity line devices)
- * @arg GPIO_Remap_CAN2 : CAN2 remapping (only for Connectivity line devices)
- * @arg GPIO_Remap_SWJ_NoJTRST : Full SWJ Enabled (JTAG-DP + SW-DP) but without JTRST
- * @arg GPIO_Remap_SWJ_JTAGDisable : JTAG-DP Disabled and SW-DP Enabled
- * @arg GPIO_Remap_SWJ_Disable : Full SWJ Disabled (JTAG-DP + SW-DP)
- * @arg GPIO_Remap_SPI3 : SPI3/I2S3 Alternate Function mapping (only for Connectivity line devices)
- * When the SPI3/I2S3 is remapped using this function, the SWJ is configured
- * to Full SWJ Enabled (JTAG-DP + SW-DP) but without JTRST.
- * @arg GPIO_Remap_TIM2ITR1_PTP_SOF : Ethernet PTP output or USB OTG SOF (Start of Frame) connected
- * to TIM2 Internal Trigger 1 for calibration (only for Connectivity line devices)
- * If the GPIO_Remap_TIM2ITR1_PTP_SOF is enabled the TIM2 ITR1 is connected to
- * Ethernet PTP output. When Reset TIM2 ITR1 is connected to USB OTG SOF output.
- * @arg GPIO_Remap_PTP_PPS : Ethernet MAC PPS_PTS output on PB05 (only for Connectivity line devices)
- * @arg GPIO_Remap_TIM15 : TIM15 Alternate Function mapping (only for Value line devices)
- * @arg GPIO_Remap_TIM16 : TIM16 Alternate Function mapping (only for Value line devices)
- * @arg GPIO_Remap_TIM17 : TIM17 Alternate Function mapping (only for Value line devices)
- * @arg GPIO_Remap_CEC : CEC Alternate Function mapping (only for Value line devices)
- * @arg GPIO_Remap_TIM1_DMA : TIM1 DMA requests mapping (only for Value line devices)
- * @arg GPIO_Remap_TIM9 : TIM9 Alternate Function mapping (only for XL-density devices)
- * @arg GPIO_Remap_TIM10 : TIM10 Alternate Function mapping (only for XL-density devices)
- * @arg GPIO_Remap_TIM11 : TIM11 Alternate Function mapping (only for XL-density devices)
- * @arg GPIO_Remap_TIM13 : TIM13 Alternate Function mapping (only for High density Value line and XL-density devices)
- * @arg GPIO_Remap_TIM14 : TIM14 Alternate Function mapping (only for High density Value line and XL-density devices)
- * @arg GPIO_Remap_FSMC_NADV : FSMC_NADV Alternate Function mapping (only for High density Value line and XL-density devices)
- * @arg GPIO_Remap_TIM67_DAC_DMA : TIM6/TIM7 and DAC DMA requests remapping (only for High density Value line devices)
- * @arg GPIO_Remap_TIM12 : TIM12 Alternate Function mapping (only for High density Value line devices)
- * @arg GPIO_Remap_MISC : Miscellaneous Remap (DMA2 Channel5 Position and DAC Trigger remapping,
- * only for High density Value line devices)
- * @param NewState: new state of the port pin remapping.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
- void GPIO_PinRemapConfig(uint32_t GPIO_Remap, FunctionalState NewState)//端口的重映像配置,输入:某重映像端口,端口映像使能或禁能
- {
- uint32_t tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;
- /* Check the parameters */
- assert_param(IS_GPIO_REMAP(GPIO_Remap));
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if((GPIO_Remap & 0x80000000) == 0x80000000)
- {
- tmpreg = AFIO->MAPR2;
- }
- else
- {
- 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 = ((uint32_t)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));
- }
- if((GPIO_Remap & 0x80000000) == 0x80000000)
- {
- AFIO->MAPR2 = tmpreg;
- }
- else
- {
- AFIO->MAPR = tmpreg;
- }
- }
- /**
- * @brief Selects the GPIO pin used as EXTI Line.
- * @param 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).
- * @param GPIO_PinSource: specifies the EXTI line to be configured.
- * This parameter can be GPIO_PinSourcex where x can be (0..15).
- * @retval None
- */
- void GPIO_EXTILineConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource)//端口的外部中断配置;输入:某端口,某引脚
- {
- uint32_t tmp = 0x00;
- /* Check the parameters */
- assert_param(IS_GPIO_EXTI_PORT_SOURCE(GPIO_PortSource));
- assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
-
- tmp = ((uint32_t)0x0F) << (0x04 * (GPIO_PinSource & (uint8_t)0x03));
- AFIO->EXTICR[GPIO_PinSource >> 0x02] &= ~tmp;
- AFIO->EXTICR[GPIO_PinSource >> 0x02] |= (((uint32_t)GPIO_PortSource) << (0x04 * (GPIO_PinSource & (uint8_t)0x03)));
- }
- /**
- * @brief Selects the Ethernet media interface.
- * @note This function applies only to STM32 Connectivity line devices.
- * @param GPIO_ETH_MediaInterface: specifies the Media Interface mode.
- * This parameter can be one of the following values:
- * @arg GPIO_ETH_MediaInterface_MII: MII mode
- * @arg GPIO_ETH_MediaInterface_RMII: RMII mode
- * @retval None
- */
- void GPIO_ETH_MediaInterfaceConfig(uint32_t GPIO_ETH_MediaInterface)//选择用作以太网的接口(模式)
- {
- assert_param(IS_GPIO_ETH_MEDIA_INTERFACE(GPIO_ETH_MediaInterface));
- /* Configure MII_RMII selection bit */
- *(__IO uint32_t *) MAPR_MII_RMII_SEL_BB = GPIO_ETH_MediaInterface;
- }
-
- /**
- * @}
- */
- /**
- * @}
- */
- /**
- * @}
- */
- /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
复制代码
|