Redpitaya Forum

Hello,
I wish to use the Red Pitaya to repeatedly send a predefined pattern to GPIO ports when triggered externally.
Have tried making C-program on the Zynq, polling the trigger line and then setting GPIO pattern, but this gives of course to much jitter, so it must be performed in the FPGA code.
According to https://redpitaya.readthedocs.io/en/lat ... b-projects, the stream-app project support streaming of GPIO, but we find no SW examples of that.

So my question is, can anyone supply SW examples of streaming to GPIO ports controlled by a trigger signal using any of the available FPGA images?

Thank you

Hi,

currently released FPGA does not yet support GPIO streaming, and neither does the streaming application.

Having more information about the requirements of this project would help to better understand its feasibility. What is the maximum length of the pattern? What is the minimum time between entries in the pattern? How many GPIO pins are used?

Thank you for answering
The requirements for the project is: Maximum length of pattern is 1ms, minimum 1 us resolution and minimum 8 digital output channels (but only two state changes pr channel pr sequence), the pattern shall be triggered externally

I found a solution to this by doing a small modification to this project: https://github.com/im-pro-at/lithpulser.