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In this tutorial we will discuss how to configure lpc1768 systick timer for 1ms tick.<br>
 
In this tutorial we will discuss how to configure lpc1768 systick timer for 1ms tick.<br>
 
At the end of the tutorial we will see how to use the ExploreEmbedded sysTick libraries.
 
At the end of the tutorial we will see how to use the ExploreEmbedded sysTick libraries.
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=Systick Module=
 
=Systick Module=

Revision as of 09:17, 15 April 2016


Objective:

In this tutorial we will discuss how to configure lpc1768 systick timer for 1ms tick.
At the end of the tutorial we will see how to use the ExploreEmbedded sysTick libraries.



Systick Module

The System Tick Timer is an integral part of the Cortex-M3. The System Tick Timer is intended to generate a fixed 10 millisecond(user configurable) interrupt for use by an operating system or other system management software.

The System Tick Timer is a 24-bit timer that counts down to zero and generates an interrupt. The intent is to provide a fixed time interval between interrupts.

In order to generate recurring interrupts at a specific interval, the STRELOAD register must be initialized with the correct value for the desired interval.



Registers

Register Address Description
STCTRL 0xE000 E010 System Timer Control and status register
STRELOAD 0xE000 E014 System Timer Reload value register
STCURR 0xE000 E018 System Timer Current value register
STCALIB 0xE000 E01C System Timer Calibration value register




Code

Using ExploreEmbedded Libraries

00 Lpc1768 Timer.jpg