c programming for Pin pio

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originally posted by niceguylow@Dec 7 2005, 02:56 PM

hi there...i'm currently having problem of understanding the pin input pio....

my nios is connected to the 16 bits pio pin in the development board...how to write a c code to retrieve the inputs from this pio..

since this inputs are in binary, do i need to convert to decimal or the system itself will convert for me in c language.

thnaks and regards

wayne

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You can try using the PIO functions made available by Altera... like the one used in the count_binary example of the HAL...

The numbers you&#39;ll read from the PIO have to be interpreted as a set of bits inside a 32-bit integer... For example, if you have a 2 bit PIO, you&#39;ll end up having the 2 bits valies inside the 2 less significant bits of the integer you read from the peripheral.

bye

Paolo