326 lines
10 KiB
C
326 lines
10 KiB
C
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/**********************************************************************
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* $Id$ lpc43xx_gpio.c 2011-06-02
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*//**
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* @file lpc43xx_gpio.c
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* @brief Contains all functions support for GPIO firmware library
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* on lpc43xx
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* @version 1.0
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* @date 02. June. 2011
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2011, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors<EFBFBD>
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* relevant copyright in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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**********************************************************************/
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/* Peripheral group ----------------------------------------------------------- */
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/** @addtogroup GPIO
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* @{
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*/
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/* Includes ------------------------------------------------------------------- */
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#include "lpc43xx_gpio.h"
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#include "lpc_types.h"
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/* If this source file built with example, the lpc43xx FW library configuration
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* file in each example directory ("lpc43xx_libcfg.h") must be included,
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* otherwise the default FW library configuration file must be included instead
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*/
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#ifdef __BUILD_WITH_EXAMPLE__
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#include "lpc43xx_libcfg.h"
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#else
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#include "lpc43xx_libcfg_default.h"
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#endif /* __BUILD_WITH_EXAMPLE__ */
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#ifdef _GPIO
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/* Private Functions ---------------------------------------------------------- */
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/* End of Private Functions --------------------------------------------------- */
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/* Public Functions ----------------------------------------------------------- */
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/** @addtogroup GPIO_Public_Functions
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* @{
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*/
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/* GPIO ------------------------------------------------------------------------------ */
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/*********************************************************************//**
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* @brief Set Direction for GPIO port.
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* @param[in] portNum Port Number value, should be in range from 0 to 4
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* @param[in] bitValue Value that contains all bits to set direction,
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* in range from 0 to 0xFFFFFFFF.
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* example: value 0x5 to set direction for bit 0 and bit 1.
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* @param[in] dir Direction value, should be:
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* - 0: Input.
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* - 1: Output.
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* @return None
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*
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* Note:
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* All remaining bits that are not activated in bitValue (value '0')
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* will not be effected by this function.
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**********************************************************************/
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void GPIO_SetDir(uint8_t portNum, uint32_t bitValue, uint8_t dir)
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{
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if (dir)
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{
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LPC_GPIO_PORT->DIR[portNum] |= bitValue;
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} else
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{
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LPC_GPIO_PORT->DIR[portNum] &= ~bitValue;
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}
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}
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/*********************************************************************//**
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* @brief Set Value for bits that have output direction on GPIO port.
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* @param[in] portNum Port number value, should be in range from 0 to 4
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* @param[in] bitValue Value that contains all bits on GPIO to set, should
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* be in range from 0 to 0xFFFFFFFF.
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* example: value 0x5 to set bit 0 and bit 1.
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* @return None
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*
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* Note:
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* - For all bits that has been set as input direction, this function will
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* not effect.
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* - For all remaining bits that are not activated in bitValue (value '0')
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* will not be effected by this function.
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**********************************************************************/
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void GPIO_SetValue(uint8_t portNum, uint32_t bitValue)
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{
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LPC_GPIO_PORT->SET[portNum] = bitValue;
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}
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/*********************************************************************//**
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* @brief Clear Value for bits that have output direction on GPIO port.
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* @param[in] portNum Port number value, should be in range from 0 to 4
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* @param[in] bitValue Value that contains all bits on GPIO to clear, should
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* be in range from 0 to 0xFFFFFFFF.
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* example: value 0x5 to clear bit 0 and bit 1.
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* @return None
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*
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* Note:
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* - For all bits that has been set as input direction, this function will
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* not effect.
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* - For all remaining bits that are not activated in bitValue (value '0')
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* will not be effected by this function.
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**********************************************************************/
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void GPIO_ClearValue(uint8_t portNum, uint32_t bitValue)
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{
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LPC_GPIO_PORT->CLR[portNum] = bitValue;
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}
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/*********************************************************************//**
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* @brief Read Current state on port pin that have input direction of GPIO
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* @param[in] portNum Port number to read value, in range from 0 to 4
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* @return Current value of GPIO port.
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*
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* Note: Return value contain state of each port pin (bit) on that GPIO regardless
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* its direction is input or output.
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**********************************************************************/
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uint32_t GPIO_ReadValue(uint8_t portNum)
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{
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return LPC_GPIO_PORT->PIN[portNum];
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}
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#ifdef GPIO_INT
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/*********************************************************************//**
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* @brief Enable GPIO interrupt (just used for P0.0-P0.30, P2.0-P2.13)
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* @param[in] portNum Port number to read value, should be: 0 or 2
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* @param[in] bitValue Value that contains all bits on GPIO to enable,
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* should be in range from 0 to 0xFFFFFFFF.
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* @param[in] edgeState state of edge, should be:
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* - 0: Rising edge
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* - 1: Falling edge
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* @return None
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**********************************************************************/
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void GPIO_IntCmd(uint8_t portNum, uint32_t bitValue, uint8_t edgeState)
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{
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if((portNum == 0)&&(edgeState == 0))
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LPC_GPIOINT->IO0IntEnR = bitValue;
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else if ((portNum == 2)&&(edgeState == 0))
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LPC_GPIOINT->IO2IntEnR = bitValue;
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else if ((portNum == 0)&&(edgeState == 1))
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LPC_GPIOINT->IO0IntEnF = bitValue;
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else if ((portNum == 2)&&(edgeState == 1))
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LPC_GPIOINT->IO2IntEnF = bitValue;
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else
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//Error
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while(1);
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}
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/*********************************************************************//**
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* @brief Get GPIO Interrupt Status (just used for P0.0-P0.30, P2.0-P2.13)
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* @param[in] portNum Port number to read value, should be: 0 or 2
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* @param[in] pinNum Pin number, should be: 0..30(with port 0) and 0..13
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* (with port 2)
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* @param[in] edgeState state of edge, should be:
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* - 0 :Rising edge
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* - 1 :Falling edge
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* @return Function status, could be:
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* - ENABLE :Interrupt has been generated due to a rising edge on P0.0
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* - DISABLE :A rising edge has not been detected on P0.0
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**********************************************************************/
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FunctionalState GPIO_GetIntStatus(uint8_t portNum, uint32_t pinNum, uint8_t edgeState)
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{
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if((portNum == 0) && (edgeState == 0))//Rising Edge
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return (((LPC_GPIOINT->IO0IntStatR)>>pinNum)& 0x1);
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else if ((portNum == 2) && (edgeState == 0))
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return (((LPC_GPIOINT->IO2IntStatR)>>pinNum)& 0x1);
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else if ((portNum == 0) && (edgeState == 1))//Falling Edge
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return (((LPC_GPIOINT->IO0IntStatF)>>pinNum)& 0x1);
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else if ((portNum == 2) && (edgeState == 1))
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return (((LPC_GPIOINT->IO2IntStatF)>>pinNum)& 0x1);
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else
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//Error
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while(1);
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}
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/*********************************************************************//**
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* @brief Clear GPIO interrupt (just used for P0.0-P0.30, P2.0-P2.13)
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* @param[in] portNum Port number to read value, should be: 0 or 2
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* @param[in] bitValue Value that contains all bits on GPIO to enable,
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* should be in range from 0 to 0xFFFFFFFF.
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* @return None
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**********************************************************************/
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void GPIO_ClearInt(uint8_t portNum, uint32_t bitValue)
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{
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if(portNum == 0)
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LPC_GPIOINT->IO0IntClr = bitValue;
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else if (portNum == 2)
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LPC_GPIOINT->IO2IntClr = bitValue;
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else
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//Invalid portNum
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while(1);
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}
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#endif
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/* FIO word accessible ----------------------------------------------------------------- */
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/* Stub function for FIO (word-accessible) style */
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/**
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* @brief The same with GPIO_SetDir()
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*/
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void FIO_SetDir(uint8_t portNum, uint32_t bitValue, uint8_t dir)
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{
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GPIO_SetDir(portNum, bitValue, dir);
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}
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/**
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* @brief The same with GPIO_SetValue()
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*/
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void FIO_SetValue(uint8_t portNum, uint32_t bitValue)
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{
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GPIO_SetValue(portNum, bitValue);
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}
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/**
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* @brief The same with GPIO_ClearValue()
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*/
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void FIO_ClearValue(uint8_t portNum, uint32_t bitValue)
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{
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GPIO_ClearValue(portNum, bitValue);
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}
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/**
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* @brief The same with GPIO_ReadValue()
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*/
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uint32_t FIO_ReadValue(uint8_t portNum)
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{
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return (GPIO_ReadValue(portNum));
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}
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#ifdef GPIO_INT
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/**
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* @brief The same with GPIO_IntCmd()
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*/
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void FIO_IntCmd(uint8_t portNum, uint32_t bitValue, uint8_t edgeState)
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{
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GPIO_IntCmd(portNum, bitValue, edgeState);
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}
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/**
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* @brief The same with GPIO_GetIntStatus()
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*/
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FunctionalState FIO_GetIntStatus(uint8_t portNum, uint32_t pinNum, uint8_t edgeState)
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{
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return (GPIO_GetIntStatus(portNum, pinNum, edgeState));
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}
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/**
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* @brief The same with GPIO_ClearInt()
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*/
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void FIO_ClearInt(uint8_t portNum, uint32_t bitValue)
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{
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GPIO_ClearInt(portNum, bitValue);
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}
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#endif
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/*********************************************************************//**
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* @brief Set mask value for bits in FIO port
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* @param[in] portNum Port number, in range from 0 to 4
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* @param[in] bitValue Value that contains all bits in to set, should be
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* in range from 0 to 0xFFFFFFFF.
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* @param[in] maskValue Mask value contains state value for each bit:
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* - 0 :not mask.
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* - 1 :mask.
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* @return None
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*
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* Note:
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* - All remaining bits that are not activated in bitValue (value '0')
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* will not be effected by this function.
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* - After executing this function, in mask register, value '0' on each bit
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* enables an access to the corresponding physical pin via a read or write access,
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* while value '1' on bit (masked) that corresponding pin will not be changed
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* with write access and if read, will not be reflected in the updated pin.
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**********************************************************************/
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void FIO_SetMask(uint8_t portNum, uint32_t bitValue, uint8_t maskValue)
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{
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if (maskValue)
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{
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LPC_GPIO_PORT->MASK[portNum] |= bitValue;
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} else
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{
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LPC_GPIO_PORT->MASK[portNum] &= ~bitValue;
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}
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}
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/**
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* @}
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*/
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#endif /* _GPIO */
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/**
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* @}
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*/
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