quartiq / etf-trace Goto Github PK

Those would also be nice and versatile to trace programs. PC sampling and DWT memory watching don't need application modifications either.

The ETF device driver should be moved into probe-rs as another Coresight component driver.

Nominally, the ETF frame parser should also live over there to handle demultiplexing trace packets, as probe-rs assigns IDs for demultiplexing.

This crate currently dumps the extracted trace packets into a binary file which can be ingested into rtic-scope for further analysis.

That currently involves a two-step process:

1. Perform the capture into ETB, parse data, demultiplex, and dump to binary file
2. Ingest binary file in rtic-scope for display

It would be beneficial if an argument could be provided on rtic-scope to do the capture + analysis as a single operation. Alternatively, we could directly call rtic-scope after collecting the trace data or provide a wrapper utility that did this.

Currently, the codebase filters the ETFs to find the correct trace funnel for the STM32H7 by looking at the component address. However, in other architectures, the ETFs may exist at different addresses.

We need to robustly identify the correct ETF in the data path of interest for configuration.

Add CI for compiling, linting, and clippy-checking the source code on PR.

Sporadically, running the utility will properly collect and demultiplex data from the ETB, but ITM decoding of the received data then fails with a Malformed packet error indicating a Hardware source packet with an invalid descriminator ID is encountered:

$ cargo run -- --output test.dump
warning: variant is never constructed: `Circular`
  --> src\etf.rs:19:5
   |
19 |     Circular = 0b00,
   |     ^^^^^^^^^^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

warning: variant is never constructed: `Hardware`
  --> src\etf.rs:28:5
   |
28 |     Hardware = 0b10,
   |     ^^^^^^^^^^^^^^^

warning: associated function is never used: `triggered`
   --> src\etf.rs:110:12
    |
110 |     pub fn triggered(&mut self) -> Result<bool, Error> {
    |            ^^^^^^^^^

warning: `etf-trace` (bin "etf-trace") generated 3 warnings
    Finished dev [unoptimized + debuginfo] target(s) in 0.16s
     Running `target\debug\etf-trace.exe --output test.dump`
[2022-07-12T14:46:12Z INFO  etf_trace] ETB level: 728 of 4096 bytes
[2022-07-12T14:46:12Z INFO  etf_trace] ETB level: 1704 of 4096 bytes
[2022-07-12T14:46:12Z INFO  etf_trace] ETB level: 2632 of 4096 bytes
[2022-07-12T14:46:12Z INFO  etf_trace] ETB level: 3504 of 4096 bytes
[2022-07-12T14:46:12Z INFO  etf_trace] ETB full
Error: Decoder error

Caused by:
    0: A malformed packet was encountered: Hardware source packet discriminator ID is invalid: 3
    1: Hardware source packet discriminator ID is invalid: 3
error: process didn't exit successfully: `target\debug\etf-trace.exe --output test.dump` (exit code: 1)

It is unknown if this is a defect in the demultiplexing process or with ITM decoding.