Hi friends, I am completely new in labview coding. I have an arduino nuo chip, connected with a DAC converter, AD5504, Analog Devices, and an operational amplier (OPA551, Texas Instruments) circuit to generate voltage output for piezoelectric firing. The wanted voltage output ranges in 0 - 60 v. However, under my coded program, there is either no voltage output or very low output, like 1.5 V. In the rare case of low voltage output, the voltage is not changable, by applying either digital write () or PWM write pin (). In the attached vi it gives error 5004 at running. Please look through my coding and help me figure it out. The pin assignments are: piezo_select = 3; //Relay that switches between piezos go_button = 5; //piezo/wire button clr = 6; sync = 10; ldac = 7; alarm = 8; r_sel = 9; led = 2. This is urgent so a quick favor is needed. Thanks.

LabVIEW

Arduino - SPI - DAC converter

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There is no voltage output at all in that vi. Which pin should I write in (output) do you think?

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Hi John,

I made some changes to the vi. There is digital read at running, but the voltage output at pin 5 meansured by a meter is zero. Seems that the data transport is blocked somewhere, possibly at SPI. Can you have a look please?

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LabVIEW

Arduino - SPI - DAC converter

Re: Arduino - SPI - DAC converter

Re: Arduino - SPI - DAC converter