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/**
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* @file : lpc17xx_gpio.c
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* @brief : Contains all functions support for GPIO firmware library on LPC17xx
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* @version : 1.0
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* @date : 11. Jun. 2009
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* @author : HieuNguyen
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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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**********************************************************************/
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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 "lpc17xx_gpio.h"
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/* If this source file built with example, the LPC17xx FW library configuration
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* file in each example directory ("lpc17xx_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 "lpc17xx_libcfg.h"
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#else
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#include "lpc17xx_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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/** @addtogroup GPIO_Private_Functions
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* @{
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*/
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/*********************************************************************//**
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* @brief Get pointer to GPIO peripheral due to GPIO port
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* @param[in] portNum Port Number value, should be in range from 0 to 4.
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* @return Pointer to GPIO peripheral
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**********************************************************************/
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static LPC_GPIO_TypeDef *GPIO_GetPointer(uint8_t portNum)
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{
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LPC_GPIO_TypeDef *pGPIO = NULL;
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switch (portNum) {
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case 0:
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pGPIO = LPC_GPIO0;
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break;
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case 1:
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pGPIO = LPC_GPIO1;
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break;
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case 2:
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pGPIO = LPC_GPIO2;
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break;
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case 3:
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pGPIO = LPC_GPIO3;
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break;
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case 4:
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pGPIO = LPC_GPIO4;
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break;
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default:
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break;
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}
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return pGPIO;
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}
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/*********************************************************************//**
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* @brief Get pointer to FIO peripheral in halfword accessible style
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* due to FIO port
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* @param[in] portNum Port Number value, should be in range from 0 to 4.
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* @return Pointer to FIO peripheral
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**********************************************************************/
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static GPIO_HalfWord_TypeDef *FIO_HalfWordGetPointer(uint8_t portNum)
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{
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GPIO_HalfWord_TypeDef *pFIO = NULL;
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switch (portNum) {
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case 0:
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pFIO = GPIO0_HalfWord;
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break;
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case 1:
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pFIO = GPIO1_HalfWord;
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break;
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case 2:
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pFIO = GPIO2_HalfWord;
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break;
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case 3:
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pFIO = GPIO3_HalfWord;
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break;
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case 4:
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pFIO = GPIO4_HalfWord;
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break;
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default:
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break;
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}
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return pFIO;
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}
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/*********************************************************************//**
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* @brief Get pointer to FIO peripheral in byte accessible style
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* due to FIO port
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* @param[in] portNum Port Number value, should be in range from 0 to 4.
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* @return Pointer to FIO peripheral
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**********************************************************************/
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static GPIO_Byte_TypeDef *FIO_ByteGetPointer(uint8_t portNum)
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{
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GPIO_Byte_TypeDef *pFIO = NULL;
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switch (portNum) {
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case 0:
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pFIO = GPIO0_Byte;
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break;
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case 1:
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pFIO = GPIO1_Byte;
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break;
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case 2:
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pFIO = GPIO2_Byte;
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break;
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case 3:
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pFIO = GPIO3_Byte;
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break;
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case 4:
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pFIO = GPIO4_Byte;
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break;
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default:
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break;
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}
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return pFIO;
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}
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/**
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* @}
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*/
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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: 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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LPC_GPIO_TypeDef *pGPIO = GPIO_GetPointer(portNum);
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if (pGPIO != NULL) {
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// Enable Output
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if (dir) {
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pGPIO->FIODIR |= bitValue;
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}
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// Enable Input
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else {
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pGPIO->FIODIR &= ~bitValue;
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}
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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,
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* 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_TypeDef *pGPIO = GPIO_GetPointer(portNum);
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if (pGPIO != NULL) {
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pGPIO->FIOSET = bitValue;
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}
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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,
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* 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_TypeDef *pGPIO = GPIO_GetPointer(portNum);
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if (pGPIO != NULL) {
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pGPIO->FIOCLR = bitValue;
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}
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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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LPC_GPIO_TypeDef *pGPIO = GPIO_GetPointer(portNum);
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if (pGPIO != NULL) {
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return pGPIO->FIOPIN;
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}
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return (0);
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}
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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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/*********************************************************************//**
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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,
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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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LPC_GPIO_TypeDef *pFIO = GPIO_GetPointer(portNum);
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if(pFIO != NULL) {
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// Mask
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if (maskValue){
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pFIO->FIOMASK |= bitValue;
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}
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// Un-mask
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else {
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pFIO->FIOMASK &= ~bitValue;
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}
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}
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}
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/* FIO halfword accessible ------------------------------------------------------------- */
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/*********************************************************************//**
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* @brief Set direction for FIO port in halfword accessible style
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* @param[in] portNum Port number, in range from 0 to 4
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* @param[in] halfwordNum HalfWord part number, should be 0 (lower) or 1(upper)
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* @param[in] bitValue Value that contains all bits in to set direction,
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* in range from 0 to 0xFFFF.
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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: 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 FIO_HalfWordSetDir(uint8_t portNum, uint8_t halfwordNum, uint16_t bitValue, uint8_t dir)
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{
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GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum);
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if(pFIO != NULL) {
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// Output direction
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if (dir) {
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// Upper
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if(halfwordNum) {
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pFIO->FIODIRU |= bitValue;
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}
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// lower
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else {
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pFIO->FIODIRL |= bitValue;
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}
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}
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// Input direction
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else {
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// Upper
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if(halfwordNum) {
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pFIO->FIODIRU &= ~bitValue;
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}
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// lower
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else {
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pFIO->FIODIRL &= ~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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* @brief Set mask value for bits in FIO port in halfword accessible style
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* @param[in] portNum Port number, in range from 0 to 4
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* @param[in] halfwordNum HalfWord part number, should be 0 (lower) or 1(upper)
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* @param[in] bitValue Value that contains all bits in to set,
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* in range from 0 to 0xFFFF.
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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_HalfWordSetMask(uint8_t portNum, uint8_t halfwordNum, uint16_t bitValue, uint8_t maskValue)
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{
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GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum);
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if(pFIO != NULL) {
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// Mask
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if (maskValue){
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// Upper
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if(halfwordNum) {
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pFIO->FIOMASKU |= bitValue;
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}
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// lower
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else {
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pFIO->FIOMASKL |= bitValue;
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}
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}
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// Un-mask
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else {
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// Upper
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if(halfwordNum) {
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pFIO->FIOMASKU &= ~bitValue;
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}
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// lower
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else {
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pFIO->FIOMASKL &= ~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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* @brief Set bits for FIO port in halfword accessible style
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* @param[in] portNum Port number, in range from 0 to 4
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* @param[in] halfwordNum HalfWord part number, should be 0 (lower) or 1(upper)
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* @param[in] bitValue Value that contains all bits in to set,
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* in range from 0 to 0xFFFF.
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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 FIO_HalfWordSetValue(uint8_t portNum, uint8_t halfwordNum, uint16_t bitValue)
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{
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GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum);
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if(pFIO != NULL) {
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// Upper
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if(halfwordNum) {
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pFIO->FIOSETU = bitValue;
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}
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// lower
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else {
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pFIO->FIOSETL = bitValue;
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}
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}
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}
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/*********************************************************************//**
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|
|
* @brief Clear bits for FIO port in halfword accessible style
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* @param[in] portNum Port number, in range from 0 to 4
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* @param[in] halfwordNum HalfWord part number, should be 0 (lower) or 1(upper)
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|
* @param[in] bitValue Value that contains all bits in to clear,
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* in range from 0 to 0xFFFF.
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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
|
|
|
* not effect.
|
|
|
* - For all remaining bits that are not activated in bitValue (value '0')
|
|
|
* will not be effected by this function.
|
|
|
**********************************************************************/
|
|
|
void FIO_HalfWordClearValue(uint8_t portNum, uint8_t halfwordNum, uint16_t bitValue)
|
|
|
{
|
|
|
GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum);
|
|
|
if(pFIO != NULL) {
|
|
|
// Upper
|
|
|
if(halfwordNum) {
|
|
|
pFIO->FIOCLRU = bitValue;
|
|
|
}
|
|
|
// lower
|
|
|
else {
|
|
|
pFIO->FIOCLRL = bitValue;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
|
|
/*********************************************************************//**
|
|
|
* @brief Read Current state on port pin that have input direction of GPIO
|
|
|
* in halfword accessible style.
|
|
|
* @param[in] portNum Port number, in range from 0 to 4
|
|
|
* @param[in] halfwordNum HalfWord part number, should be 0 (lower) or 1(upper)
|
|
|
* @return Current value of FIO port pin of specified halfword.
|
|
|
* Note: Return value contain state of each port pin (bit) on that FIO regardless
|
|
|
* its direction is input or output.
|
|
|
**********************************************************************/
|
|
|
uint16_t FIO_HalfWordReadValue(uint8_t portNum, uint8_t halfwordNum)
|
|
|
{
|
|
|
GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum);
|
|
|
if(pFIO != NULL) {
|
|
|
// Upper
|
|
|
if(halfwordNum) {
|
|
|
return (pFIO->FIOPINU);
|
|
|
}
|
|
|
// lower
|
|
|
else {
|
|
|
return (pFIO->FIOPINL);
|
|
|
}
|
|
|
}
|
|
|
return (0);
|
|
|
}
|
|
|
|
|
|
|
|
|
/* FIO Byte accessible ------------------------------------------------------------ */
|
|
|
|
|
|
/*********************************************************************//**
|
|
|
* @brief Set direction for FIO port in byte accessible style
|
|
|
* @param[in] portNum Port number, in range from 0 to 4
|
|
|
* @param[in] byteNum Byte part number, should be in range from 0 to 3
|
|
|
* @param[in] bitValue Value that contains all bits in to set direction,
|
|
|
* in range from 0 to 0xFF.
|
|
|
* @param[in] dir Direction value, should be:
|
|
|
* - 0: Input.
|
|
|
* - 1: Output.
|
|
|
* @return None
|
|
|
*
|
|
|
* Note: All remaining bits that are not activated in bitValue (value '0')
|
|
|
* will not be effected by this function.
|
|
|
**********************************************************************/
|
|
|
void FIO_ByteSetDir(uint8_t portNum, uint8_t byteNum, uint8_t bitValue, uint8_t dir)
|
|
|
{
|
|
|
GPIO_Byte_TypeDef *pFIO = FIO_ByteGetPointer(portNum);
|
|
|
if(pFIO != NULL) {
|
|
|
// Output direction
|
|
|
if (dir) {
|
|
|
if ((byteNum >= 0) && (byteNum <= 3)) {
|
|
|
pFIO->FIODIR[byteNum] |= bitValue;
|
|
|
}
|
|
|
}
|
|
|
// Input direction
|
|
|
else {
|
|
|
if ((byteNum >= 0) && (byteNum <= 3)) {
|
|
|
pFIO->FIODIR[byteNum] &= ~bitValue;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*********************************************************************//**
|
|
|
* @brief Set mask value for bits in FIO port in byte accessible style
|
|
|
* @param[in] portNum Port number, in range from 0 to 4
|
|
|
* @param[in] byteNum Byte part number, should be in range from 0 to 3
|
|
|
* @param[in] bitValue Value that contains all bits in to set mask,
|
|
|
* in range from 0 to 0xFF.
|
|
|
* @param[in] maskValue Mask value contains state value for each bit:
|
|
|
* - 0: not mask.
|
|
|
* - 1: mask.
|
|
|
* @return None
|
|
|
*
|
|
|
* Note:
|
|
|
* - All remaining bits that are not activated in bitValue (value '0')
|
|
|
* will not be effected by this function.
|
|
|
* - After executing this function, in mask register, value '0' on each bit
|
|
|
* enables an access to the corresponding physical pin via a read or write access,
|
|
|
* while value '1' on bit (masked) that corresponding pin will not be changed
|
|
|
* with write access and if read, will not be reflected in the updated pin.
|
|
|
**********************************************************************/
|
|
|
void FIO_ByteSetMask(uint8_t portNum, uint8_t byteNum, uint8_t bitValue, uint8_t maskValue)
|
|
|
{
|
|
|
GPIO_Byte_TypeDef *pFIO = FIO_ByteGetPointer(portNum);
|
|
|
if(pFIO != NULL) {
|
|
|
// Mask
|
|
|
if (maskValue) {
|
|
|
if ((byteNum >= 0) && (byteNum <= 3)) {
|
|
|
pFIO->FIOMASK[byteNum] |= bitValue;
|
|
|
}
|
|
|
}
|
|
|
// Un-mask
|
|
|
else {
|
|
|
if ((byteNum >= 0) && (byteNum <= 3)) {
|
|
|
pFIO->FIOMASK[byteNum] &= ~bitValue;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
|
|
/*********************************************************************//**
|
|
|
* @brief Set bits for FIO port in byte accessible style
|
|
|
* @param[in] portNum Port number, in range from 0 to 4
|
|
|
* @param[in] byteNum Byte part number, should be in range from 0 to 3
|
|
|
* @param[in] bitValue Value that contains all bits in to set,
|
|
|
* in range from 0 to 0xFF.
|
|
|
* @return None
|
|
|
*
|
|
|
* Note:
|
|
|
* - For all bits that has been set as input direction, this function will
|
|
|
* not effect.
|
|
|
* - For all remaining bits that are not activated in bitValue (value '0')
|
|
|
* will not be effected by this function.
|
|
|
**********************************************************************/
|
|
|
void FIO_ByteSetValue(uint8_t portNum, uint8_t byteNum, uint8_t bitValue)
|
|
|
{
|
|
|
GPIO_Byte_TypeDef *pFIO = FIO_ByteGetPointer(portNum);
|
|
|
if (pFIO != NULL) {
|
|
|
if ((byteNum >= 0) && (byteNum <= 3)){
|
|
|
pFIO->FIOSET[byteNum] = bitValue;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
|
|
/*********************************************************************//**
|
|
|
* @brief Clear bits for FIO port in byte accessible style
|
|
|
* @param[in] portNum Port number, in range from 0 to 4
|
|
|
* @param[in] byteNum Byte part number, should be in range from 0 to 3
|
|
|
* @param[in] bitValue Value that contains all bits in to clear,
|
|
|
* in range from 0 to 0xFF.
|
|
|
* @return None
|
|
|
*
|
|
|
* Note:
|
|
|
* - For all bits that has been set as input direction, this function will
|
|
|
* not effect.
|
|
|
* - For all remaining bits that are not activated in bitValue (value '0')
|
|
|
* will not be effected by this function.
|
|
|
**********************************************************************/
|
|
|
void FIO_ByteClearValue(uint8_t portNum, uint8_t byteNum, uint8_t bitValue)
|
|
|
{
|
|
|
GPIO_Byte_TypeDef *pFIO = FIO_ByteGetPointer(portNum);
|
|
|
if (pFIO != NULL) {
|
|
|
if ((byteNum >= 0) && (byteNum <= 3)){
|
|
|
pFIO->FIOCLR[byteNum] = bitValue;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
|
|
/*********************************************************************//**
|
|
|
* @brief Read Current state on port pin that have input direction of GPIO
|
|
|
* in byte accessible style.
|
|
|
* @param[in] portNum Port number, in range from 0 to 4
|
|
|
* @param[in] byteNum Byte part number, should be in range from 0 to 3
|
|
|
* @return Current value of FIO port pin of specified byte part.
|
|
|
* Note: Return value contain state of each port pin (bit) on that FIO regardless
|
|
|
* its direction is input or output.
|
|
|
**********************************************************************/
|
|
|
uint8_t FIO_ByteReadValue(uint8_t portNum, uint8_t byteNum)
|
|
|
{
|
|
|
GPIO_Byte_TypeDef *pFIO = FIO_ByteGetPointer(portNum);
|
|
|
if (pFIO != NULL) {
|
|
|
if ((byteNum >= 0) && (byteNum <= 3)){
|
|
|
return (pFIO->FIOPIN[byteNum]);
|
|
|
}
|
|
|
}
|
|
|
return (0);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
#endif /* _GPIO */
|
|
|
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
/* --------------------------------- End Of File ------------------------------ */
|
|
|
|
