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Altera_Forum's avatar
Altera_Forum
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20 years ago

custom instruction

hello, Does everyone know how to count the time of calling a custom insruction to run C program? http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/huh.gif
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Sorry,

the drivers for the performance counter are defined for the HAL of Nios II. I think u can calculate your timing using a simple timer: starting it before your call, stoping at return of the call and reading the value of timer. You could also calculate first the offset timing for these operation: starting-stoping-reading timer, and subtract this value from the timing above...