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rt-thread/bsp/stmsky001/library/src/stm32f10x_gpio.c
bernard.xiong bd76439fd2 rename stm32sky001 to stmsky001 
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@14 bbd45198-f89e-11dd-88c7-29a3b14d5316
2009-08-03 04:47:36 +00:00

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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_gpio.c
* Author : MCD Application Team
* Version : V2.0.3
* Date : 09/22/2008
* 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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