/******************** (C) COPYRIGHT 2007 STMicroelectronics ******************** | |
* File Name : stm32f10x_gpio.c | |
* Author : MCD Application Team | |
* Date First Issued : 09/29/2006 | |
* Description : This file provides all the GPIO firmware functions. | |
******************************************************************************** | |
* History: | |
* 04/02/2007: V0.2 | |
* 02/05/2007: V0.1 | |
* 09/29/2006: V0.01 | |
******************************************************************************** | |
* THE PRESENT SOFTWARE 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 SOFTWARE 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)0xF8FFFFFF) | |
#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..E) to select the GPIO peripheral. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void GPIO_DeInit(GPIO_TypeDef* 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; | |
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..E) 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(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode)); | |
assert(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(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); | |
} | |
/* Set the corresponding ODR bit */ | |
if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU) | |
{ | |
GPIOx->BSRR = (((u32)0x01) << pinpos); | |
} | |
} | |
} | |
GPIOx->CRL = tmpreg; | |
tmpreg = 0; | |
} | |
/*---------------------------- 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..E) 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(IS_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..E) to select the GPIO peripheral. | |
* Output : None | |
* Return : GPIO input data port value. | |
*******************************************************************************/ | |
u16 GPIO_ReadInputData(GPIO_TypeDef* GPIOx) | |
{ | |
return ((u16)GPIOx->IDR); | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_ReadOutputDataBit | |
* Description : Reads the specified output data port bit. | |
* Input : - GPIOx: where x can be (A..E) 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(IS_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..E) to select the GPIO peripheral. | |
* Output : None | |
* Return : GPIO output data port value. | |
*******************************************************************************/ | |
u16 GPIO_ReadOutputData(GPIO_TypeDef* GPIOx) | |
{ | |
return ((u16)GPIOx->ODR); | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_WriteBit | |
* Description : Sets or clears the selected data port bit. | |
* Input : - GPIOx: where x can be (A..E) to select the GPIO peripheral. | |
* - GPIO_Pin: specifies the port bit to be written. | |
* This parameter can be 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(IS_GPIO_PIN(GPIO_Pin)); | |
assert(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..E) 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) | |
{ | |
GPIOx->ODR = PortVal; | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_PinLockConfig | |
* Description : Locks GPIO Pins configuration registers. | |
* Input : - GPIOx: where x can be (A..E) to select the GPIO peripheral. | |
* - GPIO_Pin: specifies the port bit to be written. | |
* This parameter can be 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(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(IS_GPIO_PORT_SOURCE(GPIO_PortSource)); | |
assert(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(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_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(IS_GPIO_REMAP(GPIO_Remap)); | |
assert(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_LOCATION_MASK) | |
{ | |
tmpreg &= DBGAFR_SWJCFG_MASK; | |
} | |
else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK) | |
{ | |
tmp1 = ((u32)0x03) << tmpmask; | |
tmpreg &= ~tmp1; | |
} | |
else | |
{ | |
tmpreg &= ~tmp; | |
} | |
if (NewState != DISABLE) | |
{ | |
if ((GPIO_Remap & DBGAFR_LOCATION_MASK) == DBGAFR_LOCATION_MASK) | |
{ | |
tmpreg |= (tmp << 0x10); | |
} | |
else | |
{ | |
tmpreg |= tmp; | |
} | |
} | |
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. | |
* - 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(IS_GPIO_PORT_SOURCE(GPIO_PortSource)); | |
assert(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 2007 STMicroelectronics *****END OF FILE****/ |