Hello,
we want to use the IIO library (libiio) to control the ADRV9009 transceiver chip within our own application running on the ZCU102 board. We know the functions 'iio_buffer_push' and 'iio_buffer_refill' to send samples to the hardware (ADRV9009) and fetch data from the hardware.
My question is: If the samples (uploaded by 'iio_buffer_push') are transmitted cyclically, how can we start the reception of samples (by calling 'iio_buffer_refill' or another function) exactly when the first sample of one cycle is transmitted?
Thanks in Advance & Best Regards
There is no correlation between transmit and receive buffers from the perspective of software. Everything is best effort. When space is made in the receive buffers (like when a refill request happens)…
There is no correlation between transmit and receive buffers from the perspective of software. Everything is best effort. When space is made in the receive buffers (like when a refill request happens), the receive DMA will allow data to fill into memory, but it's rather difficult or impossible to do at specific samples.
If you need this tight coupling of samples, you will need some custom logic in the FPGA fabric.
-Travis
Thanks for the quick response. I hope we can find a solution without too much effort required for customization of the FPGA logic.