ARM Technical Support Knowledge Articles

HOW TO SERVICE A WATCHDOG TIMER WHEN USING THE SD FILE SYSTEM

Applies to: RealView Real-Time Library

Answer


Information in this article applies to:


QUESTION

I am using the RL-ARM SD/MMC flash file system in my application where I also need a watchdog timer. Formatting an SD card or reading/writing big files takes longer than the watchdog overflow period. Which function of the SD/MMC flash file system is called frequently where I can add some code to service the watchdog timer?

ANSWER

The SPI or MMC driver interface module is a good place to service the watchdog timer because these communication functions are called frequently even during a format command. Here are the function and module names for various devices:

MORE INFORMATION

ATTACHED FILES

Request the files attached to this knowledgebase article.

Article last edited on: 2007-10-04 09:11:36

Rate this article

[Bad]
|
|
[Good]
Disagree? Move your mouse over the bar and click

Did you find this article helpful? Yes No

How can we improve this article?

Link to this article
Copyright © 2011 ARM Limited. All rights reserved. External (Open), Non-Confidential