Reuse fibre in STM32

[Second222None]

Hi there,

I'd like to reuse fibre to enable the communication between Linux and STM32 (run FreeRTOS). fibre is really a good project to do this kind of thing. For a new beginer, implement an rpc from scratch is not an easy thing and I think fibre is a good start. I also referred ODrive. However, I have a lot of issues when working on this. The root cause is that I didn't understand fiber well. Hence, I decided to run the example in fibre/test (fibre over tcp).
Can anyone give some advice about the following questions:

1. I notice there is a lot of F_LOG_D. How to enable it? Any other debug methods are welcome！
2. To establish the connection between server and client. What does the following code do?

with fibre.Domain("tcp-client:address=localhost,port=14220") as domain:

Thanks a lot for any comments in advence.

[Second222None]

FIBRE_LOG(D) was enabled and I receive the following log. I am confused with this:

02:31:16.528352268 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.528456527 [SOCKET] Content  0x81 0x00 0x00 0x80 0x00 0x04 0x00 0x00 0x00 0x00 0x01 0x00

Client Side Log：

root@ubuntu:~/fibre-refs-heads-fix-ci/test# ./test_client.py
02:31:16.429999463 [USB] Using externally provided event loop
02:31:16.430236751 [USB] Using libusb native hotplug detection
02:31:16.430303761 [USB] device arrived: bus 1, 1
02:31:16.430395323 [USB] device arrived: bus 4, 1
02:31:16.430467331 [USB] device arrived: bus 3, 1
02:31:16.430540441 [USB] device arrived: bus 2, 1
02:31:16.526013597 [LIBFIBRE] opening domain
02:31:16.526100667 [FIBRE] creating domain with path "tcp-client:address=localhost,port=14220"
02:31:16.526175281 [SOCKET] starting address resolution for localhost
02:31:16.527182083 [SOCKET] address resolution complete
02:31:16.527261081 [SOCKET] resolved IP: 127.0.0.1
02:31:16.527319102 [TCP] found address
02:31:16.527565657 [SOCKET] resolved IP: 127.0.0.1
02:31:16.527645148 [TCP] found address
02:31:16.527708962 [SOCKET] resolved IP: 127.0.0.1
02:31:16.527776411 [TCP] found address
02:31:16.527847838 [TCP] found address
02:31:16.528112532 [FIBRE] found channels!
02:31:16.528230638 [LEGACY_OBJ] start
02:31:16.528352268 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.528456527 [SOCKET] Content  0x81 0x00 0x00 0x80 0x00 0x04 0x00 0x00 0x00 0x00 0x01 0x00
02:31:16.531631973 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.531760855 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.531857004 [SOCKET] Content  0x82 0x00 0x00 0x80 0x00 0x04 0x7e 0x00 0x00 0x00 0x01 0x00
02:31:16.537534992 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.537657645 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.537742046 [SOCKET] Content  0x83 0x00 0x00 0x80 0x00 0x04 0xfc 0x00 0x00 0x00 0x01 0x00
02:31:16.543464714 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.543588980 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.543671349 [SOCKET] Content  0x84 0x00 0x00 0x80 0x00 0x04 0x7a 0x01 0x00 0x00 0x01 0x00
02:31:16.549045017 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.549170926 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.549247510 [SOCKET] Content  0x85 0x00 0x00 0x80 0x00 0x04 0xf8 0x01 0x00 0x00 0x01 0x00
02:31:16.554301222 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.554441608 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.554528538 [SOCKET] Content  0x86 0x00 0x00 0x80 0x00 0x04 0x76 0x02 0x00 0x00 0x01 0x00
02:31:16.559681347 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.559792655 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.559876171 [SOCKET] Content  0x87 0x00 0x00 0x80 0x00 0x04 0xf4 0x02 0x00 0x00 0x01 0x00
02:31:16.565006219 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.565121803 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.565197293 [SOCKET] Content  0x88 0x00 0x00 0x80 0x00 0x04 0x72 0x03 0x00 0x00 0x01 0x00
02:31:16.570035665 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.570146849 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.570227745 [SOCKET] Content  0x89 0x00 0x00 0x80 0x00 0x04 0xf0 0x03 0x00 0x00 0x01 0x00
02:31:16.575076692 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.575185388 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.575266888 [SOCKET] Content  0x8a 0x00 0x00 0x80 0x00 0x04 0x6e 0x04 0x00 0x00 0x01 0x00
02:31:16.580112670 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.580214524 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.580297866 [SOCKET] Content  0x8b 0x00 0x00 0x80 0x00 0x04 0xec 0x04 0x00 0x00 0x01 0x00
02:31:16.584971158 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.585075175 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.585152646 [SOCKET] Content  0x8c 0x00 0x00 0x80 0x00 0x04 0x6a 0x05 0x00 0x00 0x01 0x00
02:31:16.589706877 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.589818214 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.589899754 [SOCKET] Content  0x8d 0x00 0x00 0x80 0x00 0x04 0xe8 0x05 0x00 0x00 0x01 0x00
02:31:16.594273906 [SOCKET] Received 128 bytes from (invalid address)
02:31:16.594401240 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.594479595 [SOCKET] Content  0x8e 0x00 0x00 0x80 0x00 0x04 0x66 0x06 0x00 0x00 0x01 0x00
02:31:16.598233317 [SOCKET] Received 89 bytes from (invalid address)
02:31:16.598339653 [SOCKET] Sent 12 bytes to (invalid address)
02:31:16.598430681 [SOCKET] Content  0x8f 0x00 0x00 0x80 0x00 0x04 0xbd 0x06 0x00 0x00 0x01 0x00
02:31:16.599918618 [SOCKET] Received 2 bytes from (invalid address)
02:31:16.600011041 [LEGACY_OBJ] received JSON of length 1725
02:31:16.600264082 [LEGACY_OBJ] sucessfully parsed JSON
02:31:16.600586702 [LIBFIBRE] discovered object 0x00007fd96c01a700
02:31:16.601713772 [LIBFIBRE] closing domain
02:31:16.602340243 [LIBFIBRE] closed (0x0000000001066260)

[samuelsadok]

1. You show debug-level log messages by setting the environment variable FIBRE_LOG=4.
2. The line with fibre.Domain("tcp-client:address=localhost,port=14220") as domain: opens a context ("domain") that will use outgoing TCP connections to localhost:14220 to look for Fibre servers.

The fact that it's saying "invalid address" is probably just a reporting issue. It looks like it connected to the server correctly and enumerated its object tree. It looks like it's not doing anything with it but maybe you disabled some likes in the example script.