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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM7_STR75x_GCC/] [STLibrary/] [src/] [75x_gpio.c] - Rev 592
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/******************** (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****/
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