CooCox Blink example and GPIO interrupt user guide

// *** CooCox Blinky ***

void BlinkExp();

int main(void)
{
    //automatically added by CoIDE
BlinkExp();

while(1)
    {
    }
}


BlinkExp();

#include "lpc11xx_syscon.h"
#include "lpc11xx_gpio.h"

void BlinkExp()
{
int i, j;

/* Enable GPIO block clock */
SYSCON_AHBPeriphClockCmd(SYSCON_AHBPeriph_GPIO, ENABLE);

/* If PIO2_9 had been set to other function, set it to PIO function. 
* NOTE: Component IOCON should be checked */
//IOCON_SetPinFunc(IOCON_PIO2_9, PIO2_9_FUN_PIO);

/* Set PIO2_9 as output. */
GPIO_SetDir(PORT2, GPIO_Pin_9, 1);

while(1) {

/* Delay some time */
for(i=0; i<20; i++) {
for(j=0; j<10000; j++) {
}
}

/* Output high level */
GPIO_SetBits(PORT2, GPIO_Pin_9);

/* Delay some time */
for(i=0; i<20; i++) {
for(j=0; j<10000; j++) {
}
}

/* Output low level */
GPIO_ResetBits(PORT2, GPIO_Pin_9);
}
}



GPIO: LPC11xx General Purpose I\O Driver

Overview

There are 4 GPIO ports (each port have 11 pins) and up to 42 General Purpose I/O pins. Each pins can be configured as input or output and can serve as an edge- or level- sensitive interrupt request. It is able to set GPIO bits without affecting any other pins in a single write operation. 

Usage

If the GPIO block clock had been disabled, enable it using SYSCON_AHBPeriphClockCmd(). 

Set the pins as input or output using GPIO_SetDir(). 

For output pins, output 1 or 0 using GPIO_SetBits() or GPIO_ResetBits(). 

Using GPIO_ReadInput() to get input status. 

Using GPIO_EventInit() to configure the pins as an edge- or level- sensitive interrupt request. 

Enable the port interrupt in NVIC using GPIO_PortIntCmd(ENABLE). 

Then when the interrupt condition is met, it will enter GPIO ISR.  

Source files

lpc11xx_gpio.h 

lpc11xx_gpio.c 

Dependency


SYSCON    

.END