Generates signal from both channels using ZMOD DAC1411

[Zufaruu]

Hi, i'm currently following this tutorial or demo linux using ZMOD DAC1411 from here. The demo only generates a signal from either channel 1 or channel 2. How to generate signal from both channels? I'm using Eclypse Z7 and Xilinx SDK 2019

Edited March 13 by Zufaruu
Adding explanation

[Cristian.Fatu]

Hello,
In order to use both (or one) channels you have to:
1. Call allocChannelsBuffer to allocate the buffer, according to the desired size bufSize. It allocates a buffer of 32 bits values (for both channels).
2. Populate the buffer: For each sample (0 to bufSize -1), place in buffer a 32 bits value obtained like this: for each desired channels (two or one) call arrangeChannelData or arrangeSignedChannelData, providing a 16 bits value corresponding to that channel. From these 16 bits, only 14 bits will be used.
3. Call setData function to transfer the buffer to the DAC internal IP buffer
4. Call start function to start the DAC generation process.

For more details see https://digilent.com/reference/zmod/awg/zmoddac1411libraryuserguide

[Zufaruu]

On 3/14/2024 at 8:30 PM, Cristian.Fatu said:

Hello,
In order to use both (or one) channels you have to:
1. Call allocChannelsBuffer to allocate the buffer, according to the desired size bufSize. It allocates a buffer of 32 bits values (for both channels).
2. Populate the buffer: For each sample (0 to bufSize -1), place in buffer a 32 bits value obtained like this: for each desired channels (two or one) call arrangeChannelData or arrangeSignedChannelData, providing a 16 bits value corresponding to that channel. From these 16 bits, only 14 bits will be used.
3. Call setData function to transfer the buffer to the DAC internal IP buffer
4. Call start function to start the DAC generation process.

For more details see https://digilent.com/reference/zmod/awg/zmoddac1411libraryuserguide

Thank you very much for the explanation. It's really helpful and it's worked :D

[Cristian.Fatu]

You are always welcome,

I am glad to hear that things work.

Good luck, and write us when you have questions.