diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_gpio.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_gpio.c | 583 |
1 files changed, 583 insertions, 0 deletions
diff --git a/stm32lib/src/stm32f10x_gpio.c b/stm32lib/src/stm32f10x_gpio.c new file mode 100644 index 0000000..1979c05 --- /dev/null +++ b/stm32lib/src/stm32f10x_gpio.c @@ -0,0 +1,583 @@ +/******************** (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****/
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