Source: https://github.com/g3gg0/flipper-logic_analyzer I'm in the process of bringing this in line with the latest flipper firmwares. Right now it loads on my flipper, next I need to test its functionality for bugs. Here are the steps I used to upload:

1. Install ufbt (pip install --upgrade ufbt)

2. Install PulseView

3. Clone this repo: git clone https://github.com/ecopsychologer/flipper-logic-analyzer

4. Change directories into the repo: cd flipper-logic-analyzer

5. Run the app ufbt launch APPID=logic_analyzer

6. Launch PulseView and connect to channels C0, C1, C3, B2, B3, A4, A6, A7
   Try to start pulseview from the terminal if you encounter problems with the configuration pulseview via gui

   pulseview -d ols:conn=/dev/ttyACM1
   

Then start PulseView and add a new "Openbench Logic Sniffer (ols)" and select the second Flipper serial port. The first port remains available for the Flipper CLI. Port numbers depend on the host, so check them after launching the app rather than assuming /dev/ttyACM1.

When arming, you can now look at the trace in PulseView.

While the analyzer is idle, press Left to cycle the GPIO input bias through P:FLT (floating, the default), P:DN (internal pull-down), and P:UP (internal pull-up). Pull-down gives disconnected inputs a stable low level for manual 3.3 V tests without external resistors. Use floating mode when the signals are already driven by the circuit under test.

The selected pull applies to all eight analyzer inputs. If the T:10K test clock is active, A7 remains a timer output; disabling the clock restores A7 as an input with the selected pull.

To check sampling timing against a hardware-generated reference clock:

1. Connect a jumper between PA7 (physical pin 2) and PC0 (physical pin 16).
2. Launch the logic analyzer and press Right. The display changes from T:OFF to T:10K and PA7 outputs a timer-driven 10 kHz square wave.
3. Capture at 100 or 200 kHz in PulseView. Channel 0 should alternate in runs of five samples at 100 kHz or ten samples at 200 kHz.
4. Press Right again to stop the test clock before removing the jumper. The app also stops the clock and restores PA7 as an input when exiting.

Changes:

• all 8 channels supported Channel 0 is C0, Channel 1 is C1, ... Channel 7 is A7
• the 200 kHz maximum matches the default used by the libsigrok OLS driver and is verified by reading back the timer-driven PA7 output
• sampling uses absolute CPU-cycle deadlines; if firmware work delays a sample, the app waits for a new period instead of adding false catch-up samples; O:n reports the number of clock restarts after the capture
• capture starts immediately when no trigger is configured
• masked trigger values and up to four sequential SUMP trigger stages are supported
• the requested capture ratio retains pre-trigger samples in a circular buffer; ring ordering is finalized after sampling to avoid a trigger-time gap
• sample capacity is sized at startup from the largest contiguous heap block; the app reserves 32 KiB for firmware services, requires space for at least 16,384 samples, and reports the resulting capacity to PulseView
• the second USB serial port carries analyzer data while the first remains available for the Flipper CLI

Run the portable capture and SUMP tests with make -C tests test. The same command runs in CI.

Discussion thread: https://discord.com/channels/740930220399525928/1074401633615749230