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Atmel system clock is not accurate

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Applicable Environment

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Topic: Atmel system clock is not accurate
SDP: 6.4.1
Target: Any supported target

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Solution

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On the 926x Atmel platforms, the BSP on Foundry contains a bug in the startup timer code. The serial port and the clock share an interrupt, so when the serial port has a lot of traffic, it generates a lot of clock events, which results in a greatly skewed clock. This has been fixed in a newer version of callout_timer_at91sam9xx.S, which can be requested through support. PR reference 75223.

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NOTE: This entry has been validated against the SDP version listed above. Use caution when considering this advice for any other SDP version. For supported releases, please reach out to QNX Technical Support if you have any questions/concerns.

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Related Attachments


Attachment Name	Size	Last Modified

callout_timer_at91sam9xx.S	5KB	2/22/2012 2:25 PM

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