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/*****************************************************************************
* gpio.c: GPIO C file for NXP LPC13xx Family Microprocessors
*
* Copyright(C) 2008, NXP Semiconductor
* All rights reserved.
*
* History
* 2008.07.20 ver 1.00 Preliminary version, first Release
* 2009.12.09 ver 1.05 Mod to use mask registers for GPIO writes + inlining (.h)
*
*****************************************************************************/
#include "LPC13xx.h" /* LPC13xx Peripheral Registers */
#include "gpio.h"
/* ===================
* CodeRed - Modified file to extract out interrupt handler related code,
* which is really application project specific.
* Set TIMER16_GENERIC_INTS to 1 to reenable original code.
* =================== */
//#define GPIO_GENERIC_INTS 1
#ifdef GPIO_GENERIC_INTS
volatile uint32_t gpio0_counter = 0;
volatile uint32_t gpio1_counter = 0;
volatile uint32_t gpio2_counter = 0;
volatile uint32_t gpio3_counter = 0;
volatile uint32_t p0_1_counter = 0;
volatile uint32_t p1_1_counter = 0;
volatile uint32_t p2_1_counter = 0;
volatile uint32_t p3_1_counter = 0;
/*****************************************************************************
** Function name: PIOINT0_IRQHandler
**
** Descriptions: Use one GPIO pin(port0 pin1) as interrupt source
**
** parameters: None
** Returned value: None
**
*****************************************************************************/
void PIOINT0_IRQHandler(void)
{
uint32_t regVal;
gpio0_counter++;
regVal = GPIOIntStatus( PORT0, 1 );
if ( regVal )
{
p0_1_counter++;
GPIOIntClear( PORT0, 1 );
}
return;
}
/*****************************************************************************
** Function name: PIOINT1_IRQHandler
**
** Descriptions: Use one GPIO pin(port1 pin1) as interrupt source
**
** parameters: None
** Returned value: None
**
*****************************************************************************/
void PIOINT1_IRQHandler(void)
{
uint32_t regVal;
gpio1_counter++;
regVal = GPIOIntStatus( PORT1, 1 );
if ( regVal )
{
p1_1_counter++;
GPIOIntClear( PORT1, 1 );
}
return;
}
/*****************************************************************************
** Function name: PIOINT2_IRQHandler
**
** Descriptions: Use one GPIO pin(port2 pin1) as interrupt source
**
** parameters: None
** Returned value: None
**
*****************************************************************************/
void PIOINT2_IRQHandler(void)
{
uint32_t regVal;
gpio2_counter++;
regVal = GPIOIntStatus( PORT2, 1 );
if ( regVal )
{
p2_1_counter++;
GPIOIntClear( PORT2, 1 );
}
return;
}
/*****************************************************************************
** Function name: PIOINT3_IRQHandler
**
** Descriptions: Use one GPIO pin(port3 pin1) as interrupt source
**
** parameters: None
** Returned value: None
**
*****************************************************************************/
void PIOINT3_IRQHandler(void)
{
uint32_t regVal;
gpio3_counter++;
regVal = GPIOIntStatus( PORT3, 1 );
if ( regVal )
{
p3_1_counter++;
GPIOIntClear( PORT3, 1 );
}
return;
}
#endif //GPIO_GENERIC_INTS
/*****************************************************************************
** 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);
#ifdef __JTAG_DISABLED
LPC_IOCON->JTAG_TDO_PIO1_1 &= ~0x07;
LPC_IOCON->JTAG_TDO_PIO1_1 |= 0x01;
#endif
/* Set up NVIC when I/O pins are configured as external interrupts. */
NVIC_EnableIRQ(EINT0_IRQn);
NVIC_EnableIRQ(EINT1_IRQn);
NVIC_EnableIRQ(EINT2_IRQn);
NVIC_EnableIRQ(EINT3_IRQn);
return;
}
/*****************************************************************************
** Function name: GPIOSetInterrupt
**
** Descriptions: Set interrupt sense, event, etc.
** edge or level, 0 is edge, 1 is level
** single or double edge, 0 is single, 1 is double
** active high or low, etc.
**
** parameters: port num, bit position, sense, single/doube, polarity
** Returned value: None
**
*****************************************************************************/
void GPIOSetInterrupt( uint32_t portNum, uint32_t bitPosi, uint32_t sense,
uint32_t single, uint32_t event )
{
switch ( portNum )
{
case PORT0:
if ( sense == 0 )
{
LPC_GPIO0->IS &= ~(0x1<<bitPosi);
/* single or double only applies when sense is 0(edge trigger). */
if ( single == 0 )
LPC_GPIO0->IBE &= ~(0x1<<bitPosi);
else
LPC_GPIO0->IBE |= (0x1<<bitPosi);
}
else
LPC_GPIO0->IS |= (0x1<<bitPosi);
if ( event == 0 )
LPC_GPIO0->IEV &= ~(0x1<<bitPosi);
else
LPC_GPIO0->IEV |= (0x1<<bitPosi);
break;
case PORT1:
if ( sense == 0 )
{
LPC_GPIO1->IS &= ~(0x1<<bitPosi);
/* single or double only applies when sense is 0(edge trigger). */
if ( single == 0 )
LPC_GPIO1->IBE &= ~(0x1<<bitPosi);
else
LPC_GPIO1->IBE |= (0x1<<bitPosi);
}
else
LPC_GPIO1->IS |= (0x1<<bitPosi);
if ( event == 0 )
LPC_GPIO1->IEV &= ~(0x1<<bitPosi);
else
LPC_GPIO1->IEV |= (0x1<<bitPosi);
break;
case PORT2:
if ( sense == 0 )
{
LPC_GPIO2->IS &= ~(0x1<<bitPosi);
/* single or double only applies when sense is 0(edge trigger). */
if ( single == 0 )
LPC_GPIO2->IBE &= ~(0x1<<bitPosi);
else
LPC_GPIO2->IBE |= (0x1<<bitPosi);
}
else
LPC_GPIO2->IS |= (0x1<<bitPosi);
if ( event == 0 )
LPC_GPIO2->IEV &= ~(0x1<<bitPosi);
else
LPC_GPIO2->IEV |= (0x1<<bitPosi);
break;
case PORT3:
if ( sense == 0 )
{
LPC_GPIO3->IS &= ~(0x1<<bitPosi);
/* single or double only applies when sense is 0(edge trigger). */
if ( single == 0 )
LPC_GPIO3->IBE &= ~(0x1<<bitPosi);
else
LPC_GPIO3->IBE |= (0x1<<bitPosi);
}
else
LPC_GPIO3->IS |= (0x1<<bitPosi);
if ( event == 0 )
LPC_GPIO3->IEV &= ~(0x1<<bitPosi);
else
LPC_GPIO3->IEV |= (0x1<<bitPosi);
break;
default:
break;
}
return;
}
/*****************************************************************************
** Function name: GPIOIntEnable
**
** Descriptions: Enable Interrupt Mask for a port pin.
**
** parameters: port num, bit position
** Returned value: None
**
*****************************************************************************/
void GPIOIntEnable( uint32_t portNum, uint32_t bitPosi )
{
switch ( portNum )
{
case PORT0:
LPC_GPIO0->IE |= (0x1<<bitPosi);
break;
case PORT1:
LPC_GPIO1->IE |= (0x1<<bitPosi);
break;
case PORT2:
LPC_GPIO2->IE |= (0x1<<bitPosi);
break;
case PORT3:
LPC_GPIO3->IE |= (0x1<<bitPosi);
break;
default:
break;
}
return;
}
/*****************************************************************************
** Function name: GPIOIntDisable
**
** Descriptions: Disable Interrupt Mask for a port pin.
**
** parameters: port num, bit position
** Returned value: None
**
*****************************************************************************/
void GPIOIntDisable( uint32_t portNum, uint32_t bitPosi )
{
switch ( portNum )
{
case PORT0:
LPC_GPIO0->IE &= ~(0x1<<bitPosi);
break;
case PORT1:
LPC_GPIO1->IE &= ~(0x1<<bitPosi);
break;
case PORT2:
LPC_GPIO2->IE &= ~(0x1<<bitPosi);
break;
case PORT3:
LPC_GPIO3->IE &= ~(0x1<<bitPosi);
break;
default:
break;
}
return;
}
/*****************************************************************************
** Function name: GPIOIntStatus
**
** Descriptions: Get Interrupt status for a port pin.
**
** parameters: port num, bit position
** Returned value: None
**
*****************************************************************************/
uint32_t GPIOIntStatus( uint32_t portNum, uint32_t bitPosi )
{
uint32_t regVal = 0;
switch ( portNum )
{
case PORT0:
if ( LPC_GPIO0->MIS & (0x1<<bitPosi) )
regVal = 1;
break;
case PORT1:
if ( LPC_GPIO1->MIS & (0x1<<bitPosi) )
regVal = 1;
break;
case PORT2:
if ( LPC_GPIO2->MIS & (0x1<<bitPosi) )
regVal = 1;
break;
case PORT3:
if ( LPC_GPIO3->MIS & (0x1<<bitPosi) )
regVal = 1;
break;
default:
break;
}
return ( regVal );
}
/*****************************************************************************
** Function name: GPIOIntClear
**
** Descriptions: Clear Interrupt for a port pin.
**
** parameters: port num, bit position
** Returned value: None
**
*****************************************************************************/
void GPIOIntClear( uint32_t portNum, uint32_t bitPosi )
{
switch ( portNum )
{
case PORT0:
LPC_GPIO0->IC |= (0x1<<bitPosi);
break;
case PORT1:
LPC_GPIO1->IC |= (0x1<<bitPosi);
break;
case PORT2:
LPC_GPIO2->IC |= (0x1<<bitPosi);
break;
case PORT3:
LPC_GPIO3->IC |= (0x1<<bitPosi);
break;
default:
break;
}
return;
}
/******************************************************************************
** End Of File
******************************************************************************/
|
