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help needed on arm7 timer interrupt
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duoduo duoduo
over 7 years ago
Note: This was originally posted on 15th January 2009 at
http://forums.arm.com
Dear all !
i am trying to use a timer interrupt to call a function in an ARM7 platform.i hope this timer interrupt can happen in a 320 microseconds interval.however,i found that when i make the interval less than 11 milliseconds exception happened.
11 milliseconds is too slow for me.why this happened?can somebody help?many thanks!
additional:i made a big mistake in my description, mixing up microseconds with milliseconds. really sorry.
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Jacob Bramley
over 7 years ago
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Note: This was originally posted on 15th January 2009 at http://forums.arm.com I'm not sure, but I think you may have mixed up your units somewhere along the line. 11 microseconds is considerably smaller...
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duoduo duoduo
over 7 years ago
Note: This was originally posted on 16th January 2009 at
http://forums.arm.com
i debug step by step and found where exception happened:when i used 320 microseconds and the routine came to the end of a function, i.e. the statement "return SUCCESS", it stopped there, after a while Undefined instruction exception happened.
and when i used 11 milliseconds ,it ran well.
why?can anybody help?
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duoduo duoduo
over 7 years ago
Note: This was originally posted on 16th January 2009 at
http://forums.arm.com
i debug step by step and found where exception happened:when i used 320 microseconds and the routine came to the end of a function, i.e. the statement "return SUCCESS", it stopped there, after a while Undefined instruction exception happened.
and when i used 11 milliseconds ,it ran well.
why?can anybody help?
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