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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM9_STR91X_IAR/] [Library/] [source/] [91x_gpio.c] - Rev 613
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** * File Name : 91x_gpio.c * Author : MCD Application Team * Date First Issued : 05/18/2006 : Version 1.0 * Description : This file provides all the GPIO software functions. ******************************************************************************** * History: * 05/24/2006 : Version 1.1 * 05/18/2006 : Version 1.0 ******************************************************************************** * 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 "91x_gpio.h" #include "91x_scu.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ static u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx); /* Private functions ---------------------------------------------------------*/ /******************************************************************************* * Function Name : GPIO_DeInit * Description : Deinitializes the GPIOx peripheral registers to their default * reset values. * Input : GPIOx: where x can be (0..9) to select the GPIO peripheral. * Output : None * Return : None *******************************************************************************/ void GPIO_DeInit(GPIO_TypeDef* GPIOx) { /* Reset the GPIO registers values */ if(GPIOx == GPIO0) { SCU_APBPeriphReset(__GPIO0,ENABLE); SCU_APBPeriphReset(__GPIO0,DISABLE); SCU->GPIOTYPE[0x00] = 0x0000 ; SCU->GPIOOUT[0x00] = 0x0000; SCU->GPIOIN[0x00] = 0x0000; } if(GPIOx == GPIO1) { SCU_APBPeriphReset(__GPIO1,ENABLE); SCU_APBPeriphReset(__GPIO1,DISABLE); SCU->GPIOTYPE[0x01] = 0x0000 ; SCU->GPIOOUT[0x01] = 0x0000; SCU->GPIOIN[0x01] = 0x0000; } if(GPIOx == GPIO2) { SCU_APBPeriphReset(__GPIO2,ENABLE); SCU_APBPeriphReset(__GPIO2,DISABLE); SCU->GPIOTYPE[0x02] = 0x0000 ; SCU->GPIOOUT[0x02] = 0x0000; SCU->GPIOIN[0x02] = 0x0000; } if(GPIOx == GPIO3) { SCU_APBPeriphReset(__GPIO3,ENABLE); SCU_APBPeriphReset(__GPIO3,DISABLE); SCU->GPIOTYPE[0x03] = 0x0000 ; SCU->GPIOOUT[0x03] = 0x0000; SCU->GPIOIN[0x03] = 0x0000; } if(GPIOx == GPIO4) { SCU_APBPeriphReset(__GPIO4,ENABLE); SCU_APBPeriphReset(__GPIO4,DISABLE); SCU->GPIOTYPE[0x04] = 0x0000 ; SCU->GPIOOUT[0x04] = 0x0000; SCU->GPIOIN[0x04] = 0x0000; SCU->GPIOANA = 0x00; } if(GPIOx == GPIO5) { SCU_APBPeriphReset(__GPIO5,ENABLE); SCU_APBPeriphReset(__GPIO5,DISABLE); SCU->GPIOTYPE[0x05] = 0x0000 ; SCU->GPIOOUT[0x05] = 0x0000; SCU->GPIOIN[0x05] = 0x0000; } if(GPIOx == GPIO6) { SCU_APBPeriphReset(__GPIO6,ENABLE); SCU_APBPeriphReset(__GPIO6,DISABLE); SCU->GPIOTYPE[0x06] = 0x0000 ; SCU->GPIOOUT[0x06] = 0x0000; SCU->GPIOIN[0x06] = 0x0000; } if(GPIOx == GPIO7) { SCU_APBPeriphReset(__GPIO7,ENABLE); SCU_APBPeriphReset(__GPIO7,DISABLE); SCU->GPIOOUT[0x07] = 0xAAAA; SCU->GPIOOUT[0x07] = 0x0000; SCU->GPIOIN[0x07] = 0x0000; } if(GPIOx == GPIO8) { SCU_APBPeriphReset(__GPIO8,ENABLE); SCU_APBPeriphReset(__GPIO8,DISABLE); SCU->GPIOEMI = 0x00; } if(GPIOx == GPIO9) { SCU_APBPeriphReset(__GPIO9,ENABLE); SCU_APBPeriphReset(__GPIO9,DISABLE); SCU->GPIOEMI = 0x00; } } /******************************************************************************* * Function Name : GPIO_Init * Description : Initializes the GPIOx peripheral according to the specified * parameters in the GPIO_InitStruct . * Input :- GPIOx: where x can be (0..9) 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) { /* Select pin direction */ u8 PinNumber = 0; u8 Counter = 0; u8 GPIO_Number = 0; GPIO_Number = GPIO_GetGPIONumber(GPIOx); if(GPIO_InitStruct->GPIO_Direction == GPIO_PinOutput) { GPIOx->DDR |= GPIO_InitStruct->GPIO_Pin; } else { GPIOx->DDR &= ~GPIO_InitStruct->GPIO_Pin; } for (Counter = 0; Counter < 8;Counter++) { /*Search pin number*/ PinNumber = (GPIO_InitStruct->GPIO_Pin & (1 <<Counter)); if((PinNumber >> Counter) == 1) { /*Output ALternate 0*/ SCU->GPIOOUT[GPIO_Number] &= ~(0x3 <<(Counter *2)); if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt1) { /*Output ALternate 1*/ SCU->GPIOOUT[GPIO_Number] |= 1 << (Counter *2); } if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt2) { /*Output ALternate 2*/ SCU->GPIOOUT[GPIO_Number] |= 0x2 << (Counter *2); } if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt3) { /*Output ALternate 3*/ SCU->GPIOOUT[GPIO_Number] |= 0x3 << (Counter *2); } /*Type configuration: PushPull or Open Collector*/ SCU->GPIOTYPE[GPIO_Number] &= ~(0x1 << Counter) ; if(GPIO_InitStruct->GPIO_Type == GPIO_Type_OpenCollector) { /*Open Drain configuration*/ SCU->GPIOTYPE[GPIO_Number] |= 0x1 << Counter; } /*IP Connected disable*/ SCU->GPIOIN[GPIO_Number] &= ~(0x1 << Counter) ; if(GPIO_InitStruct->GPIO_IPConnected == GPIO_IPConnected_Enable) { /*IP Connected enable*/ SCU->GPIOIN[GPIO_Number] |= 0x1 << Counter; } } } } /******************************************************************************* * Function Name : GPIO_StructInit * Description : Initialize the GPIO Init Structure parameters * 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_Direction = GPIO_PinInput; GPIO_InitStruct->GPIO_Type = GPIO_Type_PushPull; GPIO_InitStruct->GPIO_IPConnected = GPIO_IPConnected_Disable; GPIO_InitStruct->GPIO_Alternate = GPIO_InputAlt1; } /******************************************************************************* * Function Name : GPIO_ReadBit * Description : Reads the specified port pin * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. * : - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x * where x can be (0..7). * Output : None * Return : The port pin value *******************************************************************************/ u8 GPIO_ReadBit(GPIO_TypeDef* GPIOx, u8 GPIO_Pin) { if ((((GPIOx->DR[GPIO_Pin<<2])) & GPIO_Pin) != Bit_RESET ) { return Bit_SET; } else { return Bit_RESET; } } /******************************************************************************* * Function Name : GPIO_Read * Description : Reads the specified GPIO data port * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. * Output : None * Return : GPIO data port word value. *******************************************************************************/ u8 GPIO_Read(GPIO_TypeDef* GPIOx) { return (GPIOx->DR[0x3FC]); } /******************************************************************************* * Function Name : GPIO_WriteBit * Description : Sets or clears the selected data port bit. * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. * - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x * where x can be (0..7). * - BitVal: this parameter specifies the value to be written * to the selected bit. * BitVal 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, u8 GPIO_Pin, BitAction BitVal) { if(BitVal == Bit_SET) { GPIOx->DR[GPIO_Pin <<2] = GPIO_Pin; } else { GPIOx->DR[GPIO_Pin <<2] = 0x00; } } /******************************************************************************* * Function Name : GPIO_Write * Description : Writes the passed value in the selected data GPIOx port * register. * Input :- GPIOx: where x can be (0..9) to select the GPIO peripheral. * - PortVal: the value to be written to the data port register. * Output : None * Return : None *******************************************************************************/ void GPIO_Write(GPIO_TypeDef* GPIOx, u8 PortVal) { GPIOx->DR[0x3FC] = PortVal; } /******************************************************************************* * Function Name : GPIO_EMIConfig * Description : Enables or disables GPIO 8 and 9 in EMI mode. * Input : - NewState: new state of the EMI. * This parameter can be: ENABLE or DISABLE. * Output : None * Return : None *******************************************************************************/ void GPIO_EMIConfig(FunctionalState NewState) { if(NewState == ENABLE) { SCU->GPIOEMI = 0x01; } else { SCU->GPIOEMI = 0x00; } } /******************************************************************************* * Function Name : GPIO_ANAPinConfig * Description : Enables or disables pins from GPIO 4 in Analogue mode. * Input :- GPIO_ANAChannel: selects the ADC channel pin. * This parameter can be one of the following values: * GPIO_ANAChannel0 * GPIO_ANAChannel1 * GPIO_ANAChannel2 * GPIO_ANAChannel3 * GPIO_ANAChannel4 * GPIO_ANAChannel5 * GPIO_ANAChannel6 * GPIO_ANAChannel7 * GPIO_ANAChannelALL * - NewState: new state of the port pin. * This parameter can be: ENABLE or DISABLE. * Output : None * Return : None *******************************************************************************/ void GPIO_ANAPinConfig(u8 GPIO_ANAChannel, FunctionalState NewState) { if(NewState == ENABLE) { if(GPIO_ANAChannel == GPIO_ANAChannelALL) { SCU->GPIOOUT[4] = 0x0000; SCU->GPIOIN[4] = 0x00; } else { SCU->GPIOOUT[4] &= ~(0x3<<(GPIO_ANAChannel-1)); SCU->GPIOIN[4] &= ~GPIO_ANAChannel; } SCU->GPIOANA |= GPIO_ANAChannel; } else { SCU->GPIOANA &= ~GPIO_ANAChannel; } } /******************************************************************************* * Function Name : GPIO_GetGPIONumber * Description : searche the GPIO number. * Input : GPIOx: where x can be (0..9) to select the GPIO peripheral. * Output : None * Return : GPIO number *******************************************************************************/ u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx) { if(GPIOx == GPIO1) { return 1; } if(GPIOx == GPIO2) { return 2; } if(GPIOx == GPIO3) { return 3; } if(GPIOx == GPIO4) { return 4; } if(GPIOx == GPIO5) { return 5; } if(GPIOx == GPIO6) { return 6; } if(GPIOx == GPIO7) { return 7; } if(GPIOx == GPIO8) { return 8; } if(GPIOx == GPIO9) { return 9; } return 0; } /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
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