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Altera_Forum's avatar
Altera_Forum
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16 years ago

Strange effects of UART at reset

Hello, I use an UART peripheral to communicate with a computer. If I launch the program, it works correctly, but if I reset the Nios II processor I have some problems. Here I post an simpler ex...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Do you still have the problem?

If so, could you please confirm that you get longer output string ( by 3 characters or so ) string _each_ time you reset the CPU?

At first, I thought that maybe the reset circuit had glitches and was causing the issue, but I think that would cause more random lengths, not consistently longer outputs...

Also, you could look at the assembler output, it should be quite short ( at least for the main loop ).

Also, you could try to change the compiler optimizer to a less optimized level.