ARM NXP LPC 812 (SysTick) IRQ Blnk


SysTick IRQ Blink Program:

// Name:    Blink.c
// Purpose: LED Flasher
#include <stdint.h>
#include "LPC812.h" //my bare metal version

#define SYSTEM_CORE_CLOCK 12000000UL //12MHz

//our systick interrupt handler
void SysTick_Handler(void) {
  //toggle led pin
  GPIO_NOT = (1<<9);

int main(void) {
  //init peripherals
  //init gpio port
  //make gpio #9 pin an output (physical pin #10)
  GPIO_DIR |= (1<<9);
  //set systick clock interrupt @1ms

About Jim Eli

µC experimenter
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