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Altera_Forum's avatar
Altera_Forum
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13 years ago

Blinking LED - stays on

I was trying to use NIOS to get an LED to blink over a set period. However, everytime the code is loaded the LED stays on. After a couple of hours of troubleshooting I added a print statement f...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Moving the definition of 'delay' outside the function, and making it 

volatile int delay;
will force the compiler to generate the code loop.

I'd also add two more zeros to the count.

At a guess, the delay loop is about 20 clocks (with volatile data), at 100MHz you'd need about 2500000 iterations to get 1Hz flash.