Alexan E
The common folder libraries from keil LPC11Uxx code bundle
gpio.c
- Committer:
- alexan_e
- Date:
- 2012-05-27
- Revision:
- 0:05d110ee258e
File content as of revision 0:05d110ee258e:
/****************************************************************************
* $Id:: gpio.c 9190 2012-02-16 20:59:45Z nxp41306 $
* Project: NXP LPC11Uxx GPIO example
*
* Description:
* This file contains GPIO code example which include GPIO
* initialization, GPIO interrupt handler, and related APIs for
* GPIO access.
*
****************************************************************************
* 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.
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, under NXP Semiconductors'
* relevant copyright in the software, without fee, provided that it
* is used in conjunction with NXP Semiconductors microcontrollers. This
* copyright, permission, and disclaimer notice must appear in all copies of
* this code.
****************************************************************************/
#include "LPC11Uxx.h" /* LPC11xx Peripheral Registers */
#include "gpio.h"
volatile uint32_t flex_int0_counter = 0;
volatile uint32_t flex_int1_counter = 0;
volatile uint32_t flex_int2_counter = 0;
volatile uint32_t flex_int3_counter = 0;
volatile uint32_t flex_int4_counter = 0;
volatile uint32_t flex_int5_counter = 0;
volatile uint32_t flex_int6_counter = 0;
volatile uint32_t flex_int7_counter = 0;
volatile uint32_t gint0_counter = 0;
volatile uint32_t gint1_counter = 0;
volatile uint32_t flex_int0_level_counter = 0;
volatile uint32_t flex_int0_rising_edge_counter = 0;
volatile uint32_t flex_int0_falling_edge_counter = 0;
volatile uint32_t flex_int1_level_counter = 0;
volatile uint32_t flex_int1_rising_edge_counter = 0;
volatile uint32_t flex_int1_falling_edge_counter = 0;
volatile uint32_t flex_int2_level_counter = 0;
volatile uint32_t flex_int2_rising_edge_counter = 0;
volatile uint32_t flex_int2_falling_edge_counter = 0;
volatile uint32_t flex_int3_level_counter = 0;
volatile uint32_t flex_int3_rising_edge_counter = 0;
volatile uint32_t flex_int3_falling_edge_counter = 0;
volatile uint32_t flex_int4_level_counter = 0;
volatile uint32_t flex_int4_rising_edge_counter = 0;
volatile uint32_t flex_int4_falling_edge_counter = 0;
volatile uint32_t flex_int5_level_counter = 0;
volatile uint32_t flex_int5_rising_edge_counter = 0;
volatile uint32_t flex_int5_falling_edge_counter = 0;
volatile uint32_t flex_int6_level_counter = 0;
volatile uint32_t flex_int6_rising_edge_counter = 0;
volatile uint32_t flex_int6_falling_edge_counter = 0;
volatile uint32_t flex_int7_level_counter = 0;
volatile uint32_t flex_int7_rising_edge_counter = 0;
volatile uint32_t flex_int7_falling_edge_counter = 0;
volatile uint32_t gint0_level_counter = 0;
volatile uint32_t gint0_edge_counter = 0;
volatile uint32_t gint1_level_counter = 0;
volatile uint32_t gint1_edge_counter = 0;
/*****************************************************************************
** Function name: FLEX_INT0_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT0_IRQHandler(void)
{
flex_int0_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<0) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<0) )
{
flex_int0_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<0) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<0) ) )
{
flex_int0_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<0;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<0) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<0) ) )
{
flex_int0_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<0;
}
LPC_GPIO_PIN_INT->IST = 0x1<<0;
}
}
return;
}
/*****************************************************************************
** Function name: FLEX_INT1_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT1_IRQHandler(void)
{
flex_int1_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<1) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<1) )
{
flex_int1_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<1) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<1) ) )
{
flex_int1_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<1;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<1) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<1) ) )
{
flex_int1_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<1;
}
LPC_GPIO_PIN_INT->IST = 0x1<<1;
}
}
return;
}
/*****************************************************************************
** Function name: FLEX_INT2_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT2_IRQHandler(void)
{
flex_int2_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<2) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<2) )
{
flex_int2_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<2) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<2) ) )
{
flex_int2_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<2;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<2) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<2) ) )
{
flex_int2_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<2;
}
LPC_GPIO_PIN_INT->IST = 0x1<<2;
}
}
return;
}
/*****************************************************************************
** Function name: FLEX_INT3_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT3_IRQHandler(void)
{
flex_int3_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<3) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<3) )
{
flex_int3_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<3) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<3) ) )
{
flex_int3_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<3;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<3) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<3) ) )
{
flex_int3_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<3;
}
LPC_GPIO_PIN_INT->IST = 0x1<<3;
}
}
return;
}
/*****************************************************************************
** Function name: FLEX_INT4_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT4_IRQHandler(void)
{
flex_int4_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<4) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<4) )
{
flex_int4_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<4) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<4) ) )
{
flex_int4_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<4;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<4) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<4) ) )
{
flex_int4_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<4;
}
LPC_GPIO_PIN_INT->IST = 0x1<<4;
}
}
return;
}
/*****************************************************************************
** Function name: FLEX_INT5_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT5_IRQHandler(void)
{
flex_int5_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<5) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<5) )
{
flex_int5_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<5) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<5) ) )
{
flex_int5_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<5;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<5) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<5) ) )
{
flex_int5_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<5;
}
LPC_GPIO_PIN_INT->IST = 0x1<<5;
}
}
return;
}
/*****************************************************************************
** Function name: FLEX_INT6_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT6_IRQHandler(void)
{
flex_int6_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<6) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<6) )
{
flex_int6_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<6) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<6) ) )
{
flex_int6_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<6;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<6) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<6) ) )
{
flex_int6_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<6;
}
LPC_GPIO_PIN_INT->IST = 0x1<<6;
}
}
return;
}
/*****************************************************************************
** Function name: FLEX_INT7_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void FLEX_INT7_IRQHandler(void)
{
flex_int7_counter++;
if ( LPC_GPIO_PIN_INT->IST & (0x1<<7) )
{
if ( LPC_GPIO_PIN_INT->ISEL & (0x1<<7) )
{
flex_int7_level_counter++;
}
else
{
if ( ( LPC_GPIO_PIN_INT->RISE & (0x1<<7) ) && ( LPC_GPIO_PIN_INT->IENR & (0x1<<7) ) )
{
flex_int7_rising_edge_counter++;
LPC_GPIO_PIN_INT->RISE = 0x1<<7;
}
if ( ( LPC_GPIO_PIN_INT->FALL & (0x1<<7) ) && ( LPC_GPIO_PIN_INT->IENF & (0x1<<7) ) )
{
flex_int7_falling_edge_counter++;
LPC_GPIO_PIN_INT->FALL = 0x1<<7;
}
LPC_GPIO_PIN_INT->IST = 0x1<<7;
}
}
return;
}
/*****************************************************************************
** Function name: GINT0_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void GINT0_IRQHandler(void)
{
gint0_counter++;
if ( LPC_GPIO_GROUP_INT0->CTRL & 0x1 )
{
if ( LPC_GPIO_GROUP_INT0->CTRL & (0x1<<2) )
{
gint0_level_counter++;
}
else
{
gint0_edge_counter++;
}
LPC_GPIO_GROUP_INT0->CTRL |= 0x1;
}
return;
}
/*****************************************************************************
** Function name: GINT1_IRQHandler
**
** Descriptions: Use one GPIO pin as interrupt source
**
** parameters: None
**
** Returned value: None
**
*****************************************************************************/
void GINT1_IRQHandler(void)
{
gint1_counter++;
if ( LPC_GPIO_GROUP_INT1->CTRL & 0x1 )
{
if ( LPC_GPIO_GROUP_INT1->CTRL & (0x1<<2) )
{
gint1_level_counter++;
}
else
{
gint1_edge_counter++;
}
LPC_GPIO_GROUP_INT1->CTRL |= 0x1;
}
return;
}
/*****************************************************************************
** Function name: GPIOInit
**
** Descriptions: Initialize GPIO, install the
** GPIO interrupt handler
**
** parameters: None
**
** Returned value: true or false, return false if the VIC table
** is full and GPIO interrupt handler can be
** installed.
**
*****************************************************************************/
void GPIOInit( void )
{
/* Enable AHB clock to the GPIO domain. */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
/* Enable AHB clock to the FlexInt, GroupedInt domain. */
LPC_SYSCON->SYSAHBCLKCTRL |= ((1<<19) | (1<<23) | (1<<24));
return;
}
/*****************************************************************************
** Function name: GPIOSetFlexInterrupt
**
** Descriptions: Set interrupt sense, event, etc.
** sense: edge or level, 0 is edge, 1 is level
** event/polarity: 0 is active low/falling, 1 is high/rising.
**
** parameters: channel #, port #, bit position, sense, event(polarity)
**
** Returned value: None
**
*****************************************************************************/
void GPIOSetFlexInterrupt( uint32_t channelNum, uint32_t portNum, uint32_t bitPosi,
uint32_t sense, uint32_t event )
{
switch ( channelNum )
{
case CHANNEL0:
if ( portNum )
{
LPC_SYSCON->PINTSEL[0] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[0] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT0_IRQn);
break;
case CHANNEL1:
if ( portNum )
{
LPC_SYSCON->PINTSEL[1] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[1] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT1_IRQn);
break;
case CHANNEL2:
if ( portNum )
{
LPC_SYSCON->PINTSEL[2] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[2] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT2_IRQn);
break;
case CHANNEL3:
if ( portNum )
{
LPC_SYSCON->PINTSEL[3] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[3] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT3_IRQn);
break;
case CHANNEL4:
if ( portNum )
{
LPC_SYSCON->PINTSEL[4] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[4] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT4_IRQn);
break;
case CHANNEL5:
if ( portNum )
{
LPC_SYSCON->PINTSEL[5] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[5] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT5_IRQn);
break;
case CHANNEL6:
if ( portNum )
{
LPC_SYSCON->PINTSEL[6] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[6] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT6_IRQn);
break;
case CHANNEL7:
if ( portNum )
{
LPC_SYSCON->PINTSEL[7] = bitPosi + 24;
}
else
{
LPC_SYSCON->PINTSEL[7] = bitPosi;
}
NVIC_EnableIRQ(FLEX_INT7_IRQn);
break;
default:
break;
}
if ( sense == 0 )
{
LPC_GPIO_PIN_INT->ISEL &= ~(0x1<<channelNum); /* Edge trigger */
if ( event == 0 )
{
LPC_GPIO_PIN_INT->IENF |= (0x1<<channelNum); /* faling edge */
}
else
{
LPC_GPIO_PIN_INT->IENR |= (0x1<<channelNum); /* Rising edge */
}
}
else
{
LPC_GPIO_PIN_INT->ISEL |= (0x1<<channelNum); /* Level trigger. */
LPC_GPIO_PIN_INT->IENR |= (0x1<<channelNum); /* Level enable */
if ( event == 0 )
{
LPC_GPIO_PIN_INT->IENF &= ~(0x1<<channelNum); /* active-low */
}
else
{
LPC_GPIO_PIN_INT->IENF |= (0x1<<channelNum); /* active-high */
}
}
return;
}
/*****************************************************************************
** Function name: GPIOFlexIntEnable
**
** Descriptions: Enable Interrupt
**
** parameters: channel num, event(0 is falling edge, 1 is rising edge)
** Returned value: None
**
*****************************************************************************/
void GPIOFlexIntEnable( uint32_t channelNum, uint32_t event )
{
if ( !( LPC_GPIO_PIN_INT->ISEL & (0x1<<channelNum) ) )
{
if ( event == 0 )
{
LPC_GPIO_PIN_INT->SIENF |= (0x1<<channelNum); /* faling edge */
}
else
{
LPC_GPIO_PIN_INT->SIENR |= (0x1<<channelNum); /* Rising edge */
}
}
else
{
LPC_GPIO_PIN_INT->SIENR |= (0x1<<channelNum); /* Level */
}
return;
}
/*****************************************************************************
** Function name: GPIOFlexIntDisable
**
** Descriptions: Disable Interrupt
**
** parameters: channel num, event(0 is falling edge, 1 is rising edge)
**
** Returned value: None
**
*****************************************************************************/
void GPIOFlexIntDisable( uint32_t channelNum, uint32_t event )
{
if ( !( LPC_GPIO_PIN_INT->ISEL & (0x1<<channelNum) ) )
{
if ( event == 0 )
{
LPC_GPIO_PIN_INT->CIENF |= (0x1<<channelNum); /* faling edge */
}
else
{
LPC_GPIO_PIN_INT->CIENR |= (0x1<<channelNum); /* Rising edge */
}
}
else
{
LPC_GPIO_PIN_INT->CIENR |= (0x1<<channelNum); /* Level */
}
return;
}
/*****************************************************************************
** Function name: GPIOFlexIntStatus
**
** Descriptions: Get Interrupt status
**
** parameters: channel num
**
** Returned value: None
**
*****************************************************************************/
uint32_t GPIOFlexIntStatus( uint32_t channelNum )
{
if ( LPC_GPIO_PIN_INT->IST & (0x1<<channelNum) )
{
return( 1 );
}
else
{
return( 0 );
}
}
/*****************************************************************************
** Function name: GPIOFlexIntClear
**
** Descriptions: Clear Interrupt
**
** parameters: channel num
**
** Returned value: None
**
*****************************************************************************/
void GPIOFlexIntClear( uint32_t channelNum )
{
if ( !( LPC_GPIO_PIN_INT->ISEL & (0x1<<channelNum) ) )
{
LPC_GPIO_PIN_INT->IST = (1<<channelNum);
}
return;
}
/*****************************************************************************
** Function name: GPIOSetGroupedInterrupt
**
** Descriptions: Set interrupt logic, sense, eventPattern, etc.
** logic: AND or OR, 0 is OR, 1 is AND
** sensePattern: edge or level, 0 is edge, 1 is level
** event/polarity: 0 is active low/falling, 1 is high/rising.
**
** parameters: group #, bit pattern, logic, sense, event(polarity) pattern
**
** Returned value: None
**
*****************************************************************************/
void GPIOSetGroupedInterrupt( uint32_t groupNum, uint32_t *bitPattern, uint32_t logic,
uint32_t sense, uint32_t *eventPattern )
{
switch ( groupNum )
{
case GROUP0:
if ( sense == 0 )
{
LPC_GPIO_GROUP_INT0->CTRL &= ~(0x1<<2); /* Edge trigger */
}
else
{
LPC_GPIO_GROUP_INT0->CTRL |= (0x1<<2); /* Level trigger. */
}
LPC_GPIO_GROUP_INT0->CTRL |= (logic<<1);
LPC_GPIO_GROUP_INT0->PORT_POL[0] = *((uint32_t *)(eventPattern + 0));
LPC_GPIO_GROUP_INT0->PORT_POL[1] = *((uint32_t *)(eventPattern + 1));
LPC_GPIO_GROUP_INT0->PORT_ENA[0] = *((uint32_t *)(bitPattern + 0));
LPC_GPIO_GROUP_INT0->PORT_ENA[1] = *((uint32_t *)(bitPattern + 1));
/* as soon as enabled, an edge may be generated */
/* clear interrupt flag and NVIC pending interrupt to */
/* workaround the potential edge generated as enabled */
LPC_GPIO_GROUP_INT0->CTRL |= (1<<0);
NVIC_ClearPendingIRQ(GINT0_IRQn);
NVIC_EnableIRQ(GINT0_IRQn);
break;
case GROUP1:
if ( sense == 0 )
{
LPC_GPIO_GROUP_INT1->CTRL &= ~(0x1<<2); /* Edge trigger */
}
else
{
LPC_GPIO_GROUP_INT1->CTRL |= (0x1<<2); /* Level trigger. */
}
LPC_GPIO_GROUP_INT1->CTRL |= (logic<<1);
LPC_GPIO_GROUP_INT1->PORT_POL[0] = *((uint32_t *)(eventPattern + 0));
LPC_GPIO_GROUP_INT1->PORT_POL[1] = *((uint32_t *)(eventPattern + 1));
LPC_GPIO_GROUP_INT1->PORT_ENA[0] = *((uint32_t *)(bitPattern + 0));
LPC_GPIO_GROUP_INT1->PORT_ENA[1] = *((uint32_t *)(bitPattern + 1));
/* as soon as enabled, an edge may be generated */
/* clear interrupt flag and NVIC pending interrupt to */
/* workaround the potential edge generated as enabled */
LPC_GPIO_GROUP_INT1->CTRL |= (1<<0);
NVIC_ClearPendingIRQ(GINT1_IRQn);
NVIC_EnableIRQ(GINT1_IRQn);
break;
default:
break;
}
return;
}
/*****************************************************************************
** Function name: GPIOGetPinValue
**
** Descriptions: Read Current state of port pin, PIN register value
**
** parameters: port num, bit position
** Returned value: None
**
*****************************************************************************/
uint32_t GPIOGetPinValue( uint32_t portNum, uint32_t bitPosi )
{
uint32_t regVal = 0;
if( bitPosi < 0x20 )
{
if ( LPC_GPIO->PIN[portNum] & (0x1<<bitPosi) )
{
regVal = 1;
}
}
else if( bitPosi == 0xFF )
{
regVal = LPC_GPIO->PIN[portNum];
}
return ( regVal );
}
/*****************************************************************************
** Function name: GPIOSetBitValue
**
** Descriptions: Set/clear a bit in a specific position
**
** parameters: port num, bit position, bit value
**
** Returned value: None
**
*****************************************************************************/
void GPIOSetBitValue( uint32_t portNum, uint32_t bitPosi, uint32_t bitVal )
{
if ( bitVal )
{
LPC_GPIO->SET[portNum] = 1<<bitPosi;
}
else
{
LPC_GPIO->CLR[portNum] = 1<<bitPosi;
}
return;
}
/*****************************************************************************
** Function name: GPIOSetDir
**
** Descriptions: Set the direction in GPIO port
**
** parameters: portNum, bit position, direction (1 out, 0 input)
**
** Returned value: None
**
*****************************************************************************/
void GPIOSetDir( uint32_t portNum, uint32_t bitPosi, uint32_t dir )
{
if( dir )
{
LPC_GPIO->DIR[portNum] |= (1<<bitPosi);
}
else
{
LPC_GPIO->DIR[portNum] &= ~(1<<bitPosi);
}
return;
}
/******************************************************************************
** End Of File
******************************************************************************/