Nios® V/II Embedded Design Suite (EDS)
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Simple, Custom, PIO, on Nios II

Altera_Forum
Honored Contributor II
‎03-03-2006 05:02 PM
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Hi, I'm new to FPGAs and the Nios II soft processor core. I am trying to build a system with a button pad and LCD and I am having trouble accessing the user definable I/O pins. I have written some code using the Altera Avalon macros that allow me to write various commands onto 8 parallel pins. I have tested and verified them on the built in LEDs using PIO_LED_BASE as the address to write to. My problem is that I cant figure out how to write to 8 pins that I have my LCD connected too. Basically I want to replace PIO_LED_BASE with my own address. But I cant figure out how to find/assign an address to the user definable I/O pins. 

 

Thanks, 

Sean
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Altera_Forum
Honored Contributor II
‎03-03-2006 11:07 PM
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Check out the DE2 demo, there are a lot of good examples. 

ftp://ftp.altera.com/up/pub/de2/de2_system_v1.2.zip (ftp://ftp.altera.com/up/pub/de2/de2_system_v1.2.zip)
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