mbed gcc/gdb development?

RE: mbed gcc/gdb development?

Tüze — Tue, 01 Jul 2014 12:00:32 GMT

The pyUSB is now updated to use EP0 for HID outputs. You can try it out with the latest version of the Nordic branch of pyOCD on github,

RE: mbed gcc/gdb development?

Tüze — Mon, 23 Jun 2014 14:35:22 GMT

Hi Clem. Sorry for the delayed response. Yes your observations are correct. The nrf mkit uses ep0 for HID OUT instead of a dedicated endpoint. The pyUSB lib used by pyOCD does not seem to support this, it will require someone to take a look at the pyOCD library or the pyUSB to fix this issue. I will update you if anyone gets a chance to look at it here.

RE: mbed gcc/gdb development?

Clem Taylor — Fri, 20 Jun 2014 10:32:10 GMT

I suspect the issue is that hidapi and pyusb query the device differently. The hidapi library test program seems to be able to find the board and read from it.

See: paste.debian.net/.../

However when I built cython-hidapi and force pyOCD to use the hidapiusb (via PYOCD_USB_BACKEND=hidapiusb) , it segfaults in chooseBoard() someplace, joy...

RE: mbed gcc/gdb development?

Clem Taylor — Fri, 20 Jun 2014 08:09:50 GMT

So this makes sense, lsusb shows only 'EP 3 IN' but no out end point.

Here is the lsusb -vv for the mbed board: paste.debian.net/.../

RE: mbed gcc/gdb development?

Clem Taylor — Fri, 20 Jun 2014 08:06:19 GMT

I pulled that change, without any difference. It was trying both gdb_server.py and basic_test.py. It doesn't get past chooseBoard(), so don't think it that change will matter.

It doesn't get past the getAllConnectedInterface() loop.

I think the problem is that it isn't finding the out endpoint, not sure why.

RE: mbed gcc/gdb development?

Tüze — Fri, 20 Jun 2014 06:54:15 GMT

just updated the test file, so it should run without any problems.

RE: mbed gcc/gdb development?

Tüze — Fri, 20 Jun 2014 06:37:36 GMT

The test files are not yet updated to include nrf as target. But you can write your own python scripts to access nrf as well as use gdb (see the examples provided at the github README.md)

RE: mbed gcc/gdb development?

Clem Taylor — Fri, 20 Jun 2014 04:37:24 GMT

I upgraded the mbed firmware and tried it again in a Windows 7 VM and the sniffer worked. Thanks.

RE: mbed gcc/gdb development?

Clem Taylor — Fri, 20 Jun 2014 04:36:06 GMT

The nordic github version also can't seem to find the endpoints. When the board is not connected basic_test.py the says: INFO:root:Waiting for a USB device connected

and then waits. When I plug in the mbed board I get a stream of: ERROR:root:Endpoints not found

If I run "python gdb_server.py -d debug -l" I get: Welcome to the PyOCD GDB Server Beta Version ERROR:root:Endpoints not found No available boards is connected

This is on a new install of Fedora 20.

RE: mbed gcc/gdb development?

Tüze — Thu, 19 Jun 2014 12:37:18 GMT

Hi!

Like Sigve Sebastian said, you can find the pyOCD repo with the nrf target on the NordicSemiconductor github repo. This will be merged with the mbed pyOCD sometime in the future.

For compiling with gcc you can find example projects in the nordic SDK and adapt these to work with your mbed projects.

In order to use the sniffer with your mkit please update your interface firmware with the latest (V0216):mbed.org/.../

RE: mbed gcc/gdb development?

Sigve Sebastian Farstad — Thu, 19 Jun 2014 10:05:36 GMT

Have a look at github.com/.../pyOCD (which was just put up on GitHub).