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Altera_Forum's avatar
Altera_Forum
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16 years ago

Problem about interval timer

Hi guys now i want to use the interval timer as interrupt to send a 40khz sine wave to i/o port.but when i set the interval timer as 1us which equals the sampling frequecy of ad5547(1mhz),it does'...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Thanks a lot.

Now I set the cpu clock as 160MHz,and I set the timer period value in the Nios IDE.

It occurs a new problem,I set the timer as 0X0050,that means 80 clocks-- 2MHz sampling frequency.The result is 38KHz sine wave.

It confused me so much:confused: