Controlling the DAC and ADC via SPI

Arduino sample code in C++ is provided, which can do simple tasks like performing a calibration, doing a ramp for linearity measurements or setting the output current to a specific value. We have tested the code on an Arduino MEGA. The program is controlled via Terminal with 115200 baud. The commands are as follows:

command	description
f	searches the DAC value that corresponds to 0A current on the active channel. Always run this command before doing a calibration.
g	perform calibration on gain factors on the active channel.
r	runs a ramp on the active channel. The ramp min (rampMinAmp) and max (rampMaxAmp) current to be set in the source code. If the ramp is going over high currents (i.e. > 3A), a duty cycle can be switched on, to prevent OP amp from overheating. The sleep time after each output can be defined in the source code (rampCyclePause).
i	sets output current for the active channel to 0A and goes into idle mode.
d	reads current amplitude for the active channel and outputs it to terminal.
q	outputs configuration on terminal.
p	outputs current pulses for rise time measurements on the active channel. The high (pulseHighAmp) and low (pulseHighAmp) values of the pulse can be defined in the source code. The ON time is 1/100 of a 100 ms cycle.
c[x]	changes active channel to ‘x’. x can be a number between 1 and 4. Example “c4” sets the active channel to 4.
s[x]	sets the output current of the active channel to ‘x’. x can be only a single digit signed integer number. Example “s-2” sets the active channel current to -2A.