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Michael-C's avatar
Michael-C
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2 years ago

Nios-II Resets with PIO command

I am developing an application using the Nios-II embedded CPU. It utilizes multiple PIO ports, configured as inputs and outputs. I have one in particular that is being very troublesome. Everytime I w...
Nios Cpu
wwanalim_intel's avatar
wwanalim_intel
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2 years ago

Hi,


I am checking all the pin is correctly used for the SolA and SolB. Can you explain more on SolA and SolB.


Michael-C's avatar
Michael-C
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2 years ago

The GPIO SolA and SolB drive banks of solid state relays, PGV612A, to toggle a +24V off board signal to drive solenoids (22 in total).

The anode of the relay is tied to the +5v supply rail. The cathode of the relay is tied to the GPIO through a series resistor. The GPIO toggles between tri-state and logic 0 and is set to LVTTL in the FPGA.