/******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** | |
* File Name : 75x_gpio.c | |
* Author : MCD Application Team | |
* Date First Issued : 03/10/2006 | |
* Description : This file provides all the GPIO software functions. | |
******************************************************************************** | |
* History: | |
* 07/17/2006 : V1.0 | |
* 03/10/2006 : V0.1 | |
******************************************************************************** | |
* 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 "75x_gpio.h" | |
#include "75x_mrcc.h" | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
#define GPIO_Remap_Mask 0x1F /* GPIO remapping mask */ | |
#define GPIO_Pin_Mask 0x000FFFFF /* GPIO1 and GPIO2 all pins mask */ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private functions ---------------------------------------------------------*/ | |
/******************************************************************************* | |
* Function Name : GPIO_DeInit | |
* Description : Deinitializes the GPIOx peripheral registers to their default | |
* reset values. | |
* The I/O remapping register 0 and 1 are not reset by this function. | |
* Input : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void GPIO_DeInit(GPIO_TypeDef* GPIOx) | |
{ | |
/* Reset the GPIOx registers values */ | |
GPIOx->PC0 = 0xFFFFFFFF; | |
GPIOx->PC1 = 0x0; | |
GPIOx->PC2 = 0x0; | |
GPIOx->PM = 0x0; | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_Init | |
* Description : Initializes the GPIOx peripheral according to the specified | |
* parameters in the GPIO_InitStruct. This function will not | |
* change the configuration for a pin if the corresponding mask | |
* bit is set, except pins configured as input pull-up or pull-down. | |
* These pins are automatically masked after each configuration. | |
* Input :- GPIOx: where x can be (0..2) 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) | |
{ | |
/* GPIOx Mode and Pins Set */ | |
if((GPIOx != GPIO0) && (GPIO_InitStruct->GPIO_Pin == GPIO_Pin_All)) | |
{ | |
GPIO_InitStruct->GPIO_Pin = GPIO_Pin_Mask; | |
} | |
switch(GPIO_InitStruct->GPIO_Mode) | |
{ | |
case GPIO_Mode_AIN: | |
GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin; | |
break; | |
case GPIO_Mode_IN_FLOATING: | |
GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin; | |
break; | |
case GPIO_Mode_IPD: | |
GPIOx->PM &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PD &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PM |= GPIO_InitStruct->GPIO_Pin; | |
break; | |
case GPIO_Mode_IPU: | |
GPIOx->PM &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PD |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PM |= GPIO_InitStruct->GPIO_Pin; | |
break; | |
case GPIO_Mode_Out_OD: | |
GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin; | |
break; | |
case GPIO_Mode_Out_PP: | |
GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin; | |
break; | |
case GPIO_Mode_AF_OD: | |
GPIOx->PD |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin; | |
break; | |
case GPIO_Mode_AF_PP: | |
GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin; | |
break; | |
default : | |
GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin; | |
GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin; | |
break; | |
} | |
} | |
/******************************************************************************* | |
* 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_Mode = GPIO_Mode_IN_FLOATING; | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_Read | |
* Description : Reads the specified GPIO data port. | |
* Input : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral. | |
* Output : None | |
* Return : GPIO data port word value. | |
*******************************************************************************/ | |
u32 GPIO_Read(GPIO_TypeDef* GPIOx) | |
{ | |
return GPIOx->PD; | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_ReadBit | |
* Description : Reads the specified data port bit. | |
* Input : - GPIOx: where x can be (0..2) 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..31) for | |
* GPIO0 and x(0..19) for GPIO1 and GPIO2. | |
* Output : None | |
* Return : The port pin value | |
*******************************************************************************/ | |
u8 GPIO_ReadBit(GPIO_TypeDef* GPIOx, u32 GPIO_Pin) | |
{ | |
if ((GPIOx->PD & GPIO_Pin) != Bit_RESET) | |
{ | |
return Bit_SET; | |
} | |
else | |
{ | |
return Bit_RESET; | |
} | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_Write | |
* Description : Writes data to the specified GPIO data port. | |
* Input :- GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral. | |
* - PortVal: specifies the value to be written to the data port | |
* register. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void GPIO_Write(GPIO_TypeDef* GPIOx, u32 PortVal) | |
{ | |
GPIOx->PD = PortVal; | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_WriteBit | |
* Description : Sets or clears the selected data port bit. | |
* Input : - GPIOx: where x can be (0..2) 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..31) for | |
* GPIO0 and x(0..19) for GPIO1 and GPIO2. | |
* - BitVal: specifies the value to be written to the selected bit. | |
* This parameter must 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, u32 GPIO_Pin, BitAction BitVal) | |
{ | |
if(BitVal != Bit_RESET) | |
{ | |
GPIOx->PD |= GPIO_Pin; | |
} | |
else | |
{ | |
GPIOx->PD &= ~GPIO_Pin; | |
} | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_PinMaskConfig | |
* Description : Enables or disables write protection to the selected bits in | |
* the I/O port registers (PxC2, PxC1, PxC0 and PxD). | |
* Input :- GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral. | |
* - GPIO_Pin: specifies the port bit to be protected. | |
* This parameter can be GPIO_Pin_x where x can be (0..31) for | |
* GPIO0 and x(0..19) for GPIO1 and GPIO2. | |
* - NewState: new state of the port pin. | |
* This parameter can be: ENABLE or DISABLE. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void GPIO_PinMaskConfig(GPIO_TypeDef* GPIOx, u32 GPIO_Pin, FunctionalState NewState) | |
{ | |
if(NewState == ENABLE) | |
{ | |
GPIOx->PM |= GPIO_Pin; | |
} | |
else | |
{ | |
GPIOx->PM &= ~GPIO_Pin; | |
} | |
} | |
/******************************************************************************* | |
* Function Name : GPIO_GetPortMask | |
* Description : Gets the GPIOx port mask value. | |
* Input : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral. | |
* Output : None | |
* Return : GPIO port mask value. | |
*******************************************************************************/ | |
u32 GPIO_GetPortMask(GPIO_TypeDef* GPIOx) | |
{ | |
return GPIOx->PM; | |
} | |
/******************************************************************************* | |
* 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_SMI_CS3_EN: Enable SMI CS3 | |
* - GPIO_Remap_SMI_CS2_EN: Enable SMI CS2 | |
* - GPIO_Remap_SMI_CS1_EN: Enable SMI CS1 | |
* - GPIO_Remap_SMI_EN: Enable SMI Alternate Functions: | |
* SMI_CS0, SMI_CK, SMI_DIN and SMI_DOUT | |
* - GPIO_Remap_DBGOFF: JTAG Disable | |
* - GPIO_Remap_UART1: UART1 Alternate Function mapping | |
* - GPIO_Remap_UART2: UART2 Alternate Function mapping | |
* - GPIO_Remap_SSP1: SSP1 Alternate Function mapping | |
* - GPIO_Remap_TIM2: TIM2 Alternate Function mapping | |
* - GPIO_Remap_TIM0: TIM0 Alternate Function mapping | |
* - NewState: new state of the port pin. | |
* This parameter can be: ENABLE or DISABLE. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void GPIO_PinRemapConfig(u16 GPIO_Remap, FunctionalState NewState) | |
{ | |
u32 GPIOReg = 0; | |
u32 PinPos = 0; | |
/* Get the GPIO register index */ | |
GPIOReg = GPIO_Remap >> 5; | |
/* Get the pin position */ | |
PinPos = GPIO_Remap & GPIO_Remap_Mask; | |
if(GPIOReg == 1) /* The pin to remap is in REMAP0R register */ | |
{ | |
if(NewState == ENABLE) | |
{ | |
GPIOREMAP->REMAP0R |= (1 << PinPos); | |
} | |
else | |
{ | |
GPIOREMAP->REMAP0R &= ~(1 << PinPos); | |
} | |
} | |
else if(GPIOReg == 2) /* The pin to remap is in REMAP1R register */ | |
{ | |
if(NewState == ENABLE) | |
{ | |
GPIOREMAP->REMAP1R |= (1 << PinPos); | |
} | |
else | |
{ | |
GPIOREMAP->REMAP1R &= ~(1 << PinPos); | |
} | |
} | |
} | |
/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/ |