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ctacke

877 Posts
Posted - 14 Mar 2002 :  14:10:31  Show Profile  Email Poster
Heartbeat.exe


Heartbeat is a simple application that flashes LED1 on ADS development systems. If you have a problem causing your device to lock or become unresponsive, you can use Heartbeat to determine if the kernel is still running.

Heartbeat supports a command line parameter for run duration in seconds.
A duration of -1 is infinite.
The default duration is infinite.

i.e. To run heartbeat for 60 seconds:
heartbeat.exe 60


Key APIs Used

CreateFile
WriteFile
GetCommState
SetCommState

Lines of Code: 85


Source Download
Rev 3 (73k zip).

modified March 31, 02 (ctacke) - added key APIs and LOC
edited 11-Apr-2003 by akidder: update to rev 3; add CommState functions to list; 49->85 lines

akidder

1519 Posts
Posted - 11 Apr 2003 :  17:35:22  Show Profile  Email Poster
Bitsy Update: Use of COM1 DTR Line

We've updated the Heartbeat application to work on Bitsy and Bitsy Plus systems. Take a look at these Bitsy and Bitsy Plus topics for details about why it's necessary to control the LED using the DTR signal of COM1 instead of using the LED1: driver.


Important Notes: If you run this application on a Bitsy or Bitsy Plus....
  1. The application won't work if COM1: is already open.

  2. Other applications will not be able to use COM1: while the application is running.

  3. If your PC is connected to COM1: of your device, your PC will probably think that ActiveSync is trying to connect, but will ultimately give an error message that it can't establish a connection. Disconnect from Serial 1 to avoid this issue.
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tbronez

17 Posts
Posted - 26 Feb 2004 :  14:40:17  Show Profile  Email Poster
This code doesn't appear to work on the BitsyX, even though no other applications are using COM1. Looking at the BitsyX User Manual (110115-00032), it's not clear to me what mechanism is available, if any, on the BitsyX to control the LED. Can you point me in the right direction?
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ctacke

877 Posts
Posted - 26 Feb 2004 :  17:00:10  Show Profile  Email Poster
Tom,

You are correct that this will not work on the BitsyX, nor will it work on the AGX. For a BitsyX example see Topic 1397. For the AGX see Topic 1372.
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