Sending Data to Fprime Deployment without GDS

[vibai-aspade]

Hi everyone,

I'm hitting a roadblock with my Android GDS app for our F' project and could use a second pair of eyes.
The weird thing is, communication works in one direction—the device can send telemetry to my phone just fine. But when my phone sends a command back, the firmware acts like it never received it. My breakpoint in the ComStub's drvReceiveIn_handler never gets hit.

I've made sure fprime-gds isn't running, and I'm sending a fully-framed packet with the right start word and CRC. It feels like the data is getting lost somewhere between the USB driver and the F' ComStub. Any ideas on what I might be missing?

Thank you!

[LeStarch]

It sounds like you were able to test with the fprime-gds at some point, which would validate the UART receive code for command uplink. Thus my suspicion is that the phone may not be sending out the data on the line, or that the phone is using different UART configuration from the telemetry side.

You could try moving your breakpoint into the UART driver if the phone is actually sending out data and see if there is a hang-up there.