lpc17xx_gpio.c
657 lines
| 20.5 KiB
| text/x-c
|
CLexer
r71 | /** | |||
* @file : lpc17xx_gpio.c | ||||
* @brief : Contains all functions support for GPIO firmware library on LPC17xx | ||||
* @version : 1.0 | ||||
* @date : 11. Jun. 2009 | ||||
* @author : HieuNguyen | ||||
************************************************************************** | ||||
* Software that is described herein is for illustrative purposes only | ||||
* which provides customers with programming information regarding the | ||||
* products. This software is supplied "AS IS" without any warranties. | ||||
* NXP Semiconductors assumes no responsibility or liability for the | ||||
* use of the software, conveys no license or title under any patent, | ||||
* copyright, or mask work right to the product. NXP Semiconductors | ||||
* reserves the right to make changes in the software without | ||||
* notification. NXP Semiconductors also make no representation or | ||||
* warranty that such application will be suitable for the specified | ||||
* use without further testing or modification. | ||||
**********************************************************************/ | ||||
/* Peripheral group ----------------------------------------------------------- */ | ||||
/** @addtogroup GPIO | ||||
* @{ | ||||
*/ | ||||
/* Includes ------------------------------------------------------------------- */ | ||||
#include "lpc17xx_gpio.h" | ||||
/* If this source file built with example, the LPC17xx FW library configuration | ||||
* file in each example directory ("lpc17xx_libcfg.h") must be included, | ||||
* otherwise the default FW library configuration file must be included instead | ||||
*/ | ||||
#ifdef __BUILD_WITH_EXAMPLE__ | ||||
#include "lpc17xx_libcfg.h" | ||||
#else | ||||
#include "lpc17xx_libcfg_default.h" | ||||
#endif /* __BUILD_WITH_EXAMPLE__ */ | ||||
#ifdef _GPIO | ||||
/* Private Functions ---------------------------------------------------------- */ | ||||
/** @addtogroup GPIO_Private_Functions | ||||
* @{ | ||||
*/ | ||||
/*********************************************************************//** | ||||
* @brief Get pointer to GPIO peripheral due to GPIO port | ||||
* @param[in] portNum Port Number value, should be in range from 0 to 4. | ||||
* @return Pointer to GPIO peripheral | ||||
**********************************************************************/ | ||||
static LPC_GPIO_TypeDef *GPIO_GetPointer(uint8_t portNum) | ||||
{ | ||||
LPC_GPIO_TypeDef *pGPIO = NULL; | ||||
switch (portNum) { | ||||
case 0: | ||||
pGPIO = LPC_GPIO0; | ||||
break; | ||||
case 1: | ||||
pGPIO = LPC_GPIO1; | ||||
break; | ||||
case 2: | ||||
pGPIO = LPC_GPIO2; | ||||
break; | ||||
case 3: | ||||
pGPIO = LPC_GPIO3; | ||||
break; | ||||
case 4: | ||||
pGPIO = LPC_GPIO4; | ||||
break; | ||||
default: | ||||
break; | ||||
} | ||||
return pGPIO; | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Get pointer to FIO peripheral in halfword accessible style | ||||
* due to FIO port | ||||
* @param[in] portNum Port Number value, should be in range from 0 to 4. | ||||
* @return Pointer to FIO peripheral | ||||
**********************************************************************/ | ||||
static GPIO_HalfWord_TypeDef *FIO_HalfWordGetPointer(uint8_t portNum) | ||||
{ | ||||
GPIO_HalfWord_TypeDef *pFIO = NULL; | ||||
switch (portNum) { | ||||
case 0: | ||||
pFIO = GPIO0_HalfWord; | ||||
break; | ||||
case 1: | ||||
pFIO = GPIO1_HalfWord; | ||||
break; | ||||
case 2: | ||||
pFIO = GPIO2_HalfWord; | ||||
break; | ||||
case 3: | ||||
pFIO = GPIO3_HalfWord; | ||||
break; | ||||
case 4: | ||||
pFIO = GPIO4_HalfWord; | ||||
break; | ||||
default: | ||||
break; | ||||
} | ||||
return pFIO; | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Get pointer to FIO peripheral in byte accessible style | ||||
* due to FIO port | ||||
* @param[in] portNum Port Number value, should be in range from 0 to 4. | ||||
* @return Pointer to FIO peripheral | ||||
**********************************************************************/ | ||||
static GPIO_Byte_TypeDef *FIO_ByteGetPointer(uint8_t portNum) | ||||
{ | ||||
GPIO_Byte_TypeDef *pFIO = NULL; | ||||
switch (portNum) { | ||||
case 0: | ||||
pFIO = GPIO0_Byte; | ||||
break; | ||||
case 1: | ||||
pFIO = GPIO1_Byte; | ||||
break; | ||||
case 2: | ||||
pFIO = GPIO2_Byte; | ||||
break; | ||||
case 3: | ||||
pFIO = GPIO3_Byte; | ||||
break; | ||||
case 4: | ||||
pFIO = GPIO4_Byte; | ||||
break; | ||||
default: | ||||
break; | ||||
} | ||||
return pFIO; | ||||
} | ||||
/** | ||||
* @} | ||||
*/ | ||||
/* Public Functions ----------------------------------------------------------- */ | ||||
/** @addtogroup GPIO_Public_Functions | ||||
* @{ | ||||
*/ | ||||
/* GPIO ------------------------------------------------------------------------------ */ | ||||
/*********************************************************************//** | ||||
* @brief Set Direction for GPIO port. | ||||
* @param[in] portNum Port Number value, should be in range from 0 to 4 | ||||
* @param[in] bitValue Value that contains all bits to set direction, | ||||
* in range from 0 to 0xFFFFFFFF. | ||||
* example: value 0x5 to set direction for bit 0 and bit 1. | ||||
* @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 GPIO_SetDir(uint8_t portNum, uint32_t bitValue, uint8_t dir) | ||||
{ | ||||
LPC_GPIO_TypeDef *pGPIO = GPIO_GetPointer(portNum); | ||||
if (pGPIO != NULL) { | ||||
// Enable Output | ||||
if (dir) { | ||||
pGPIO->FIODIR |= bitValue; | ||||
} | ||||
// Enable Input | ||||
else { | ||||
pGPIO->FIODIR &= ~bitValue; | ||||
} | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Set Value for bits that have output direction on GPIO port. | ||||
* @param[in] portNum Port number value, should be in range from 0 to 4 | ||||
* @param[in] bitValue Value that contains all bits on GPIO to set, | ||||
* in range from 0 to 0xFFFFFFFF. | ||||
* example: value 0x5 to set bit 0 and bit 1. | ||||
* @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 GPIO_SetValue(uint8_t portNum, uint32_t bitValue) | ||||
{ | ||||
LPC_GPIO_TypeDef *pGPIO = GPIO_GetPointer(portNum); | ||||
if (pGPIO != NULL) { | ||||
pGPIO->FIOSET = bitValue; | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Clear Value for bits that have output direction on GPIO port. | ||||
* @param[in] portNum Port number value, should be in range from 0 to 4 | ||||
* @param[in] bitValue Value that contains all bits on GPIO to clear, | ||||
* in range from 0 to 0xFFFFFFFF. | ||||
* example: value 0x5 to clear bit 0 and bit 1. | ||||
* @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 GPIO_ClearValue(uint8_t portNum, uint32_t bitValue) | ||||
{ | ||||
LPC_GPIO_TypeDef *pGPIO = GPIO_GetPointer(portNum); | ||||
if (pGPIO != NULL) { | ||||
pGPIO->FIOCLR = bitValue; | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Read Current state on port pin that have input direction of GPIO | ||||
* @param[in] portNum Port number to read value, in range from 0 to 4 | ||||
* @return Current value of GPIO port. | ||||
* | ||||
* Note: Return value contain state of each port pin (bit) on that GPIO regardless | ||||
* its direction is input or output. | ||||
**********************************************************************/ | ||||
uint32_t GPIO_ReadValue(uint8_t portNum) | ||||
{ | ||||
LPC_GPIO_TypeDef *pGPIO = GPIO_GetPointer(portNum); | ||||
if (pGPIO != NULL) { | ||||
return pGPIO->FIOPIN; | ||||
} | ||||
return (0); | ||||
} | ||||
/* FIO word accessible ----------------------------------------------------------------- */ | ||||
/* Stub function for FIO (word-accessible) style */ | ||||
/** | ||||
* @brief The same with GPIO_SetDir() | ||||
*/ | ||||
void FIO_SetDir(uint8_t portNum, uint32_t bitValue, uint8_t dir) | ||||
{ | ||||
GPIO_SetDir(portNum, bitValue, dir); | ||||
} | ||||
/** | ||||
* @brief The same with GPIO_SetValue() | ||||
*/ | ||||
void FIO_SetValue(uint8_t portNum, uint32_t bitValue) | ||||
{ | ||||
GPIO_SetValue(portNum, bitValue); | ||||
} | ||||
/** | ||||
* @brief The same with GPIO_ClearValue() | ||||
*/ | ||||
void FIO_ClearValue(uint8_t portNum, uint32_t bitValue) | ||||
{ | ||||
GPIO_ClearValue(portNum, bitValue); | ||||
} | ||||
/** | ||||
* @brief The same with GPIO_ReadValue() | ||||
*/ | ||||
uint32_t FIO_ReadValue(uint8_t portNum) | ||||
{ | ||||
return (GPIO_ReadValue(portNum)); | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Set mask value for bits in FIO port | ||||
* @param[in] portNum Port number, in range from 0 to 4 | ||||
* @param[in] bitValue Value that contains all bits in to set, | ||||
* in range from 0 to 0xFFFFFFFF. | ||||
* @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_SetMask(uint8_t portNum, uint32_t bitValue, uint8_t maskValue) | ||||
{ | ||||
LPC_GPIO_TypeDef *pFIO = GPIO_GetPointer(portNum); | ||||
if(pFIO != NULL) { | ||||
// Mask | ||||
if (maskValue){ | ||||
pFIO->FIOMASK |= bitValue; | ||||
} | ||||
// Un-mask | ||||
else { | ||||
pFIO->FIOMASK &= ~bitValue; | ||||
} | ||||
} | ||||
} | ||||
/* FIO halfword accessible ------------------------------------------------------------- */ | ||||
/*********************************************************************//** | ||||
* @brief Set direction for FIO port 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) | ||||
* @param[in] bitValue Value that contains all bits in to set direction, | ||||
* in range from 0 to 0xFFFF. | ||||
* @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_HalfWordSetDir(uint8_t portNum, uint8_t halfwordNum, uint16_t bitValue, uint8_t dir) | ||||
{ | ||||
GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum); | ||||
if(pFIO != NULL) { | ||||
// Output direction | ||||
if (dir) { | ||||
// Upper | ||||
if(halfwordNum) { | ||||
pFIO->FIODIRU |= bitValue; | ||||
} | ||||
// lower | ||||
else { | ||||
pFIO->FIODIRL |= bitValue; | ||||
} | ||||
} | ||||
// Input direction | ||||
else { | ||||
// Upper | ||||
if(halfwordNum) { | ||||
pFIO->FIODIRU &= ~bitValue; | ||||
} | ||||
// lower | ||||
else { | ||||
pFIO->FIODIRL &= ~bitValue; | ||||
} | ||||
} | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Set mask value for bits in FIO port 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) | ||||
* @param[in] bitValue Value that contains all bits in to set, | ||||
* in range from 0 to 0xFFFF. | ||||
* @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_HalfWordSetMask(uint8_t portNum, uint8_t halfwordNum, uint16_t bitValue, uint8_t maskValue) | ||||
{ | ||||
GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum); | ||||
if(pFIO != NULL) { | ||||
// Mask | ||||
if (maskValue){ | ||||
// Upper | ||||
if(halfwordNum) { | ||||
pFIO->FIOMASKU |= bitValue; | ||||
} | ||||
// lower | ||||
else { | ||||
pFIO->FIOMASKL |= bitValue; | ||||
} | ||||
} | ||||
// Un-mask | ||||
else { | ||||
// Upper | ||||
if(halfwordNum) { | ||||
pFIO->FIOMASKU &= ~bitValue; | ||||
} | ||||
// lower | ||||
else { | ||||
pFIO->FIOMASKL &= ~bitValue; | ||||
} | ||||
} | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Set bits for FIO port 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) | ||||
* @param[in] bitValue Value that contains all bits in to set, | ||||
* in range from 0 to 0xFFFF. | ||||
* @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_HalfWordSetValue(uint8_t portNum, uint8_t halfwordNum, uint16_t bitValue) | ||||
{ | ||||
GPIO_HalfWord_TypeDef *pFIO = FIO_HalfWordGetPointer(portNum); | ||||
if(pFIO != NULL) { | ||||
// Upper | ||||
if(halfwordNum) { | ||||
pFIO->FIOSETU = bitValue; | ||||
} | ||||
// lower | ||||
else { | ||||
pFIO->FIOSETL = bitValue; | ||||
} | ||||
} | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Clear bits for FIO port 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) | ||||
* @param[in] bitValue Value that contains all bits in to clear, | ||||
* in range from 0 to 0xFFFF. | ||||
* @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_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 ------------------------------ */ | ||||