The OUT4 peripheral gives you direct control of four FPGA output pins.
The OUT4 peripheral gives you direct access to each of the four pins in a Baseboard slot. The lowest numbered pin on the connector is controlled by the LSB in the outval resource. OUT4 works with any of the following cards: GPIO with pin headers GPIO with screw terminals Open-Drain Driver Card Quad 10-Amp Relay Card USB 2.0 Hub Card
outval : the value on the output pins. A write to this resource sets the FPGA pins on the slot to the value specified. This resource works with both dpget and dpset.
Set pins 3 and 4 high and pins 1 and 2 low.
dpset out4 outval cYou may want more than one OUT4 peripheral in your system. Recall that you must access peripherals by slot number when there your system has multiples of the same peripheral. For example, the following set the outputs for OUT4 peripherals in slots 2, 3, and 4.
dpset 2 outval c dpset 3 outval 0 dpset 4 outval f