OpenOCD can't find the CMSIS-DAP device, but pyocd can.

[tmb]

New to hardware and MCUs in general; apologies in advance if there's something obvious going on here.

I have a Picoprobe with the latest firmware which is ostensibly connected correctly to another Pico. I built openocd out of this repo, which fails with the following log when running src/openocd -f interface/cmsis-dap.cfg -f target/rp2040.cfg -s tcl -d: https://hastebin.com/nahocejomu.apache

The line Debug: 162 16 cmsis_dap_usb_bulk.c:177 cmsis_dap_usb_open(): enumerating interfaces of 0x2e8a:0x0004 is intriguing to me because the Picoprobe is connected to my machine with the vendor ID 0x2e8a.

I tried pyocd after getting this error repeatedly, which has been working well; I'd like to be using openocd, though.

Thanks in advance.

[P33M]

Which instructions are you following?

[tmb]

Sorry for the delay in response. I'm following the PDF here: https://datasheets.raspberrypi.com/pico/getting-started-with-pico.pdf

Specifically, I got the error after I hit page 67.

[P33M]

Are you using the release uf2 from this repository?

[BenoitVII]

Did you manage to solve your issue? I'm facing it right now, I just followed all the instructions for building this repo, building the picoprobe uf2 that I flashed, and I got the same message

src/openocd -f interface/cmsis-dap.cfg -c "adapter speed 5000" -f target/rp2040.cfg -s tcl
---------------------------------------------------------------

Open On-Chip Debugger 0.11.0-g8e3c38f-dirty (2023-11-11-15:56)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
Error: The specified debug interface was not found (cmsis-dap)
The following debug adapters are available:
1: jlink

The message is the same even if I disconnect the picoprobe.

[fex95]

I had the same problem. The command to install the dependencies in getting-started-with-pico.pdf has a line break in it, which means that mingw-w64-x86_64-libusb will not be installed and therefore the cmsis-dap adapter will not be included in the OpenOCD build.

You can install the package later using pacman -S mingw-w64-x86_64-libusb and then perform the configuration and build again.

After the ./configure --disable-werror command, check that the CMSIS-DAP v2 Compliant Debugger is enabled. My output looks like this:

OpenOCD configuration summary
--------------------------------------------------
MPSSE mode of FTDI based devices        yes (auto)
ST-Link Programmer                      yes (auto)
TI ICDI JTAG Programmer                 yes (auto)
Keil ULINK JTAG Programmer              yes (auto)
Altera USB-Blaster II Compatible        yes (auto)
Bitbang mode of FT232R based devices    yes (auto)
Versaloon-Link JTAG Programmer          yes (auto)
TI XDS110 Debug Probe                   yes (auto)
CMSIS-DAP v2 Compliant Debugger         yes (auto)
OSBDM (JTAG only) Programmer            yes (auto)
eStick/opendous JTAG Programmer         yes (auto)
Olimex ARM-JTAG-EW Programmer           yes (auto)
Raisonance RLink JTAG Programmer        yes (auto)
USBProg JTAG Programmer                 yes (auto)
Espressif JTAG Programmer               yes (auto)
Andes JTAG Programmer (deprecated)      no
CMSIS-DAP Compliant Debugger            no
Nu-Link Programmer                      no
Cypress KitProg Programmer              no
Altera USB-Blaster Compatible           no
ASIX Presto Adapter                     no
OpenJTAG Adapter                        no
Linux GPIO bitbang through libgpiod     no
SEGGER J-Link Programmer                yes (auto)
Bus Pirate                              no
Use Capstone disassembly framework      no

[lurch]

The command to install the dependencies in getting-started-with-pico.pdf has a line break in it, which means that mingw-w64-x86_64-libusb will not be installed

I believe the style used in the Pico / RP2040 databooks is that if a line starts with a $ then it means that it's the start of a new command-line, but if it doesn't start with a $ then it's a continuation of the previous command-line (i.e. it all needs to be typed on a single line). See also https://github.com/raspberrypi/pico-feedback/issues/331