Systick Timer On Explore M3

In this tutorial we will discuss how to configure lpc1768 systick timer for 1ms tick.

Prerequisites

Please check this tutorial for detailed explanation on inbuilt Lpc1768 RTC module.
If you are doing it for the first time, then check the below links to setup the project for generating the .bin file.

1. Keil4 Setup
2. Keil5 Setup
3. ARM GCC Setup
4. Eclipse & ARM GCC Setup

Hardware Connection

LED is Connected to pin 13 on Explore M3 board.

Code

Below is the sample code to blink the LED's with 1ms delay using systick timer.

	#include "stdutils.h"
	#include "systick.h"
	#include "gpio.h"
	#define LED 13
	void myIsr(void)
	{
	GPIO_PinToggle(LED); /* Toggle the LED(13) to measure the time */
	}
	int main()
	{
	SystemInit();
	GPIO_PinDirection(LED,OUTPUT); /* Configure the Led Pin as Output */
	SysTick_Init(); /* Initialize SysTick for 1ms(default)*/
	SysTick_AttachInterrupt(myIsr); /* myIsr will be called by SysTick_Handler every ms */
	SysTick_Start(); /* Start SysTick Timer */
	while(1)
	{
	/* Do Nothing */
	}
	}

view raw exploreM3_SysTickTimer.c hosted with ❤ by GitHub

Demo

Timer Delay measured using CRO.