how to write command for AD9837

Hi,

The AD9837 requires a CMOS oscillator... a crystal wont work.

You may try to use a bench square wave to check if this is the problem.

Regards,

Miguel

i am using cmos  oscillator .It was working fine with aurdino board but not nrf52 dk

May the problem is the SPI interface mode.. Could you provide a plot of SPI transmission between nrf52 and AD9837, please?

Hi pawanvulichi

Have you received the answers you need? Are you able to provide a plot of SPI transmission as requested above?

Thank you

EZ admin

Hi pawanvulichi,

I would like to close this discussion here. Have you received the answer you need? Thank you for letting me know

best regards

Bernhard 

I suggest you create a new ticket for your question. It can be confusing to add questions to a closed ticket.

As for the commands, I suggest using 0x2180 to stop the clock before writing the frequency register. The codes for the frequency register are correct.

We do not know the board NRF52DK and we cannot provide support for this product or its SW.