noopwafel/libsigrok

libsigrok's Issues

Recommendations on moving this forward

Hello,
I'd like to help out with getting the VDS1022 supported in sigrok. Do you have any recommended next steps?
I have your changes building and running, but I'm just getting flat line readings when attached to the 1khz test output. I'm wondering if the device channels are configured in GND coupling mode versus AC or DC, or maybe the channels are misconfigured in another way (voltage levels, triggering). One way I'm thinking to fix this is to setup wireshark monitoring of the Windows VM when toggling these channel settings, and double-checking that these commands are sent by sigrok.

I also skipped the firmware upload step after this command fails https://github.com/noopwafel/libsigrok/blob/master/src/hardware/owon-vds-tiny/protocol.c#L275:

vds_packed_cmd_response(sdi, 0x223, buffer, 1, 'E', &response);

I'm not sure where 0x233 originates. I couldn't find this anywhere in the decompiled source. Also, the device is working in the Windows VM, so I didn't want to risk messing-up the existing firmware.

The debug log seems to show working communication:

...
sr: [00:04.847196] session: bus: Received SR_DF_FRAME_BEGIN packet.
sr: [00:04.862227] owon-vds-tiny: receive_transfer(): status LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED received 5211 bytes.
sr: [00:04.862304] owon-vds-tiny: got incoming packet
sr: [00:04.862392] session: bus: Received SR_DF_ANALOG packet (5098 samples).
"Querying config key samplerate is not allowed"
sr: [00:04.869545] owon-vds-tiny: receive_transfer(): status LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED received 5211 bytes.
sr: [00:04.869601] owon-vds-tiny: got incoming packet
sr: [00:04.869684] session: bus: Received SR_DF_ANALOG packet (5098 samples).
"Querying config key samplerate is not allowed"
sr: [00:04.869958] session: bus: Received SR_DF_FRAME_END packet.
...

I've also been trying to get the vendor's java version working on Linux in tinwhisker/Owon-VDS1022#6, but have been encountering some roadblocks. If we can get it to work from java source on linux, it should hopefully be straightforward to then achieve full sigrok support.