controll a DAC

jaspittman

i need to output a continuous analog voltage. i am using a MAX5354 digital to analog converter. i have tried outputting a voltage with this program

voltage=512

LOW CS
SHIFTOUT DIN, SCLK, MSBFIRST, [noparse][[/noparse]voltage/16]
HIGH CS

but it doesn't work.

it outputs 5 volts instead of 2.5 (vref X 512/1024)

jaspittman

I think i figured out the problem. i had the DAC address wrong

dacaddr = $2000

voltage=512+dacaddr

LOW CS
SHIFTOUT DIN, SCLK, MSBFIRST, [noparse][[/noparse]voltage/16]
HIGH CS

I think this correct.·I will check tonight.