Example timer

From wiki.emacinc.com
Revision as of 12:41, 2 January 2014 by Jgreene (talk | contribs) (Using timer)
Jump to: navigation, search

This is a guide to the timer C example project included in the EMAC OE SDK.

This project demonstrates how to use the software timer.

The timer project builds one executable: timer.

Opening, Building and Uploading the Project Files

1. Open the C/C++ editing perspective.


2. Open the project files.


3. Build the project.


4. Upload the executables to the target system.


Usage and Behavior

Hardware Requirements

The timer C example project will run just fine on any system for which it can be compiled.

Using timer

The timer program is executed from the console. It takes a single parameter.

./timer frequency

Where frequency specifies the frequency of the timer's tick cycle.
It reports the delay between ticks, running until it is manually halted with a CTRL-C.

Usage Example

root@som9g20:/tmp# ./timer 1     
Starting timer at 1 HZ
delay : 1002  ms 
delay : 1000  ms 
delay : 1000  ms 

Specifying 1 as our tick freqency, the timer cycles at a sedate 1000 ms (1 s) until we manually stop it with a CTRL-C.