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Altera_Forum's avatar
Altera_Forum
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14 years ago

genral software problem

im writing a simple clock program for a niosII standard processor and i encountered this bug in my main loop i have an infinite loop which updates all the seven segments(DE2 board) like w...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Could well be.

Without a function call (a call to any globally visible function should do) the compiler can/will cache all 'time' variables in registers.

Marking them as 'volatile' will force the compiler to issue a memory read for each loop iteration.