1.12 Generic Timer Periodic Interrupt

This application toggles an LED based off the Generic Timer interrupt. Every time the Generic Timer counter expires the LED toggles. You can start, stop and change period of the timer counter using push button switches.

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/generic_timer/start_stop_period_change.

To build the application, refer to the following table and open the project using its IDE.

To load the application binary onto the target device, we need to use at91bootstrap loader. Refer to the at91bootstrap loader documentation for details on how to configure, build and run bootstrap loader project and use it to bootstrap the application binaries.

The following table shows the target hardware for the application projects.

1. Build and run the application using its IDE
2. Press SW2 switch to start/stop timer
3. LED toggles at a fixed rate when timer is on and stops toggling when timer is off
4. Press SW4 switch to change the timer period
5. When timer period is changed LED toggle rate is changed
6. Timer period cycles between 250ms, 500ms, 750ms and 1000ms