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3e9490031b
The tracing runs a higher priority task (SNIFFER) than the packet injection (on CONSOLE task) and both RX and TX are using the same buffer, so when we are sending a packet, we are getting immediately preempted by the tracer and bad stuffs happen. Now, we can manually inject packets and get the text trace of the response. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=none TEST=with the SOP' experimental patch, plug a full-featured cable into Samus with Twinkie as an interposer, then do the following sequence: Pretend there is a device > tw resistor rd 0 Enable the text tracing > tw trace on Send discover identity to the cable (and get the descriptors) > tw sendprime 1 0x104f ff008001 Sent CC1 104f + 1 = 381 165.939687 SRC/0 [0141]GOODCRC 165.942520 SRC/0 [514f]VDM Vff00:DISCID,ACK:ff008041 1c00050d 00000000 030a0000 11082032 Change-Id: Ie0ad57341c6476e983229b532716986dffefa8a1 Reviewed-on: https://chromium-review.googlesource.com/342512 Commit-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Benson Leung <bleung@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly