blinky.c: LED blinky C file for NXP LPC11xx Family Microprocessors - 2008, NXP Semiconductor
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/* Set port 2_0 to output */
GPIOSetDir( 2, 0, 1 );
...
GPIOSetValue( 2, 0, 0 );
...
void GPIOSetDir( uint32_t portNum, uint32_t bitPosi, uint32_t dir );
void GPIOSetValue( uint32_t portNum, uint32_t bitPosi, uint32_t bitVal );
...
/*****************************************************************************
** Function name: GPIOSetDir
**
** Descriptions: Set the direction in GPIO port
**
** parameters: port num, bit position, direction (1 out, 0 input)
** Returned value: None
**
*****************************************************************************/
void GPIOSetDir( uint32_t portNum, uint32_t bitPosi, uint32_t dir )
{
/* if DIR is OUT(1), but GPIOx_DIR is not set, set DIR
to OUT(1); if DIR is IN(0), but GPIOx_DIR is set, clr
DIR to IN(0). All the other cases are ignored.
On port3(bit 0 through 3 only), no error protection if
bit value is out of range. */
switch ( portNum )
{
case PORT0:
if ( !(LPC_GPIO0->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO0->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO0->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO0->DIR &= ~(0x1<<bitPosi);
break;
case PORT1:
if ( !(LPC_GPIO1->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO1->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO1->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO1->DIR &= ~(0x1<<bitPosi);
break;
case PORT2:
if ( !(LPC_GPIO2->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO2->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO2->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO2->DIR &= ~(0x1<<bitPosi);
break;
case PORT3:
if ( !(LPC_GPIO3->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO3->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO3->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO3->DIR &= ~(0x1<<bitPosi);
break;
default:
break;
}
return;
}
/*****************************************************************************
** Function name: GPIOSetValue
**
** Descriptions: Set/clear a bitvalue in a specific bit position
** in GPIO portX(X is the port number.)
**
** parameters: port num, bit position, bit value
** Returned value: None
**
*****************************************************************************/
void GPIOSetValue( uint32_t portNum, uint32_t bitPosi, uint32_t bitVal )
{
/* if bitVal is 1, the bitPosi bit is set in the GPIOShadowPortx. Then
* GPIOShadowPortx is written to the I/O port register. */
switch ( portNum )
{
case PORT0:
if(bitVal)
GPIOShadowPort0 |= (1<<bitPosi);
else
GPIOShadowPort0 &= ~(1<<bitPosi);
/* Use of shadow prevents bit operation error if the read value
* (external hardware state) of a pin differs from the I/O latch
* value. A potential side effect is that other GPIO code in this
* project that is not aware of the shadow will have its GPIO
* state overwritten.
*/
LPC_GPIO0->DATA = GPIOShadowPort0;
break;
case PORT1:
if(bitVal)
GPIOShadowPort1 |= (1<<bitPosi);
else
GPIOShadowPort1 &= ~(1<<bitPosi);
LPC_GPIO1->DATA = GPIOShadowPort1;
break;
case PORT2:
if(bitVal)
GPIOShadowPort2 |= (1<<bitPosi);
else
GPIOShadowPort2 &= ~(1<<bitPosi);
LPC_GPIO2->DATA = GPIOShadowPort2;
break;
case PORT3:
if(bitVal)
GPIOShadowPort3 |= (1<<bitPosi);
else
GPIOShadowPort3 &= ~(1<<bitPosi);
LPC_GPIO3->DATA = GPIOShadowPort3;
break;
default:
break;
}
return;
}
/*****************************************************************************
* blinky.c: LED blinky C file for NXP LPC11xx Family Microprocessors
*
* Copyright(C) 2008, NXP Semiconductor
* All rights reserved.
*
* History
* 2008.08.20 ver 1.00 Prelimnary version, first Release
*
******************************************************************************/
#include "LPC11xx.h" /* LPC11xx definitions */
#include "timer16.h"
#include "clkconfig.h"
#include "gpio.h"
#define TEST_TIMER_NUM 0 /* 0 or 1 for 16-bit timers only */
extern volatile uint32_t timer16_0_counter;
extern volatile uint32_t timer16_1_counter;
/* Main Program */
int main (void) {
SystemInit();
/* Config CLKOUT, mostly used for debugging. */
CLKOUT_Setup( CLKOUTCLK_SRC_MAIN_CLK );
LPC_IOCON->PIO0_1 &= ~0x07;
LPC_IOCON->PIO0_1 |= 0x01; /* CLK OUT */
/* Enable AHB clock to the GPIO domain. */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
/* TEST_TIMER_NUM is either 0 or 1 for 16-bit timer 0 or 1. */
init_timer16(TEST_TIMER_NUM, TIME_INTERVAL);
enable_timer16(TEST_TIMER_NUM);
/* Set port 2_0 to output */
GPIOSetDir( 2, 0, 1 );
while (1) /* Loop forever */
{
#if TEST_TIMER_NUM
/* I/O configuration and LED setting pending. */
if ( (timer16_1_counter > 0) && (timer16_1_counter <= 200) )
{
GPIOSetValue( 2, 0, 0 );
}
if ( (timer16_1_counter > 200) && (timer16_1_counter <= 400) )
{
GPIOSetValue( 2, 0, 1 );
}
else if ( timer16_1_counter > 400 )
{
timer16_1_counter = 0;
}
#else
/* I/O configuration and LED setting pending. */
if ( (timer16_0_counter > 0) && (timer16_0_counter <= 200) )
{
GPIOSetValue( 2, 0, 0 );
}
if ( (timer16_0_counter > 200) && (timer16_0_counter <= 400) )
{
GPIOSetValue( 2, 0, 1 );
}
else if ( timer16_0_counter > 400 )
{
timer16_0_counter = 0;
}
#endif
}
}
/*****************************************************************************
* gpio.h: Header file for NXP LPC1xxx Family Microprocessors
*
* Copyright(C) 2008, NXP Semiconductor
* All rights reserved.
*
* History
* 2008.09.01 ver 1.00 Prelimnary version, first Release
*
******************************************************************************/
#ifndef __GPIO_H
#define __GPIO_H
#define PORT0 0
#define PORT1 1
#define PORT2 2
#define PORT3 3
void GPIO_IRQHandler(void);
void GPIOInit( void );
void GPIOSetDir( uint32_t portNum, uint32_t bitPosi, uint32_t dir );
void GPIOSetValue( uint32_t portNum, uint32_t bitPosi, uint32_t bitVal );
void GPIOSetInterrupt( uint32_t portNum, uint32_t bitPosi, uint32_t sense,
uint32_t single, uint32_t event );
void GPIOIntEnable( uint32_t portNum, uint32_t bitPosi );
void GPIOIntDisable( uint32_t portNum, uint32_t bitPosi );
uint32_t GPIOIntStatus( uint32_t portNum, uint32_t bitPosi );
void GPIOIntClear( uint32_t portNum, uint32_t bitPosi );
#endif /* end __GPIO_H */
/*****************************************************************************
** End Of File
******************************************************************************/
/*****************************************************************************
* gpio.c: GPIO C file for NXP LPC11xx Family Microprocessors
*
* Copyright(C) 2008, NXP Semiconductor
* All rights reserved.
*
* History
* 2008.07.20 ver 1.00 Prelimnary version, first Release
*
*****************************************************************************/
#include "LPC11xx.h" /* LPC11xx Peripheral Registers */
#include "gpio.h"
/* Shadow registers used to prevent chance of read-modify-write errors */
/* Ultra-conservative approach... */
volatile uint32_t GPIOShadowPort0;
volatile uint32_t GPIOShadowPort1;
volatile uint32_t GPIOShadowPort2;
volatile uint32_t GPIOShadowPort3;
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;
}
/*****************************************************************************
** 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: GPIOSetDir
**
** Descriptions: Set the direction in GPIO port
**
** parameters: port num, bit position, direction (1 out, 0 input)
** Returned value: None
**
*****************************************************************************/
void GPIOSetDir( uint32_t portNum, uint32_t bitPosi, uint32_t dir )
{
/* if DIR is OUT(1), but GPIOx_DIR is not set, set DIR
to OUT(1); if DIR is IN(0), but GPIOx_DIR is set, clr
DIR to IN(0). All the other cases are ignored.
On port3(bit 0 through 3 only), no error protection if
bit value is out of range. */
switch ( portNum )
{
case PORT0:
if ( !(LPC_GPIO0->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO0->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO0->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO0->DIR &= ~(0x1<<bitPosi);
break;
case PORT1:
if ( !(LPC_GPIO1->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO1->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO1->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO1->DIR &= ~(0x1<<bitPosi);
break;
case PORT2:
if ( !(LPC_GPIO2->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO2->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO2->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO2->DIR &= ~(0x1<<bitPosi);
break;
case PORT3:
if ( !(LPC_GPIO3->DIR & (0x1<<bitPosi)) && (dir == 1) )
LPC_GPIO3->DIR |= (0x1<<bitPosi);
else if ( (LPC_GPIO3->DIR & (0x1<<bitPosi)) && (dir == 0) )
LPC_GPIO3->DIR &= ~(0x1<<bitPosi);
break;
default:
break;
}
return;
}
/*****************************************************************************
** Function name: GPIOSetValue
**
** Descriptions: Set/clear a bitvalue in a specific bit position
** in GPIO portX(X is the port number.)
**
** parameters: port num, bit position, bit value
** Returned value: None
**
*****************************************************************************/
void GPIOSetValue( uint32_t portNum, uint32_t bitPosi, uint32_t bitVal )
{
/* if bitVal is 1, the bitPosi bit is set in the GPIOShadowPortx. Then
* GPIOShadowPortx is written to the I/O port register. */
switch ( portNum )
{
case PORT0:
if(bitVal)
GPIOShadowPort0 |= (1<<bitPosi);
else
GPIOShadowPort0 &= ~(1<<bitPosi);
/* Use of shadow prevents bit operation error if the read value
* (external hardware state) of a pin differs from the I/O latch
* value. A potential side effect is that other GPIO code in this
* project that is not aware of the shadow will have its GPIO
* state overwritten.
*/
LPC_GPIO0->DATA = GPIOShadowPort0;
break;
case PORT1:
if(bitVal)
GPIOShadowPort1 |= (1<<bitPosi);
else
GPIOShadowPort1 &= ~(1<<bitPosi);
LPC_GPIO1->DATA = GPIOShadowPort1;
break;
case PORT2:
if(bitVal)
GPIOShadowPort2 |= (1<<bitPosi);
else
GPIOShadowPort2 &= ~(1<<bitPosi);
LPC_GPIO2->DATA = GPIOShadowPort2;
break;
case PORT3:
if(bitVal)
GPIOShadowPort3 |= (1<<bitPosi);
else
GPIOShadowPort3 &= ~(1<<bitPosi);
LPC_GPIO3->DATA = GPIOShadowPort3;
break;
default:
break;
}
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
******************************************************************************/
.END
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