please help to get JTAG working on esp wrover kit

[imtiaz]

Hi All,

I have followed the instructions to get JTAG working on the esp wrover kit on a virtual linux machine. when I invoke the following command :
./src/openocd -s ./tcl -f ./esp32.cfg

I get the following response:

Error : no device found
Error : unable to open ftdi device with vid 0403, pid8a98 , description '*' , serial '*' at bus location '*'
Error : libusb_open() failed eith LIBUDB_ERROR_ACCESS

Please help
Thanks
Imtiaz

[imtiaz]

got a bit further :

Open On-Chip Debugger 0.10.0-dev-g90071eb (2017-03-15-07:48)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
none separate
adapter speed: 200 kHz
force hard breakpoints
Error: no device found
Error: unable to open ftdi device with vid 0403, pid 8a98, description '*', serial '*' at bus location '*'
Info : clock speed 200 kHz
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: esp32.cpu0: IR capture error; saw 0x1f not 0x01
Warn : Bypassing JTAG setup events due to errors
Info : esp32.cpu0: Debug controller was reset (pwrstat=0xFF, after clear 0xFF).
Info : esp32.cpu0: Core was reset (pwrstat=0xFF, after clear 0xFF).
Info : esp32.cpu1: Debug controller was reset (pwrstat=0xFF, after clear 0xFF).
Info : esp32.cpu1: Core was reset (pwrstat=0xFF, after clear 0xFF).

[ESP_Sprite]

The esp-wrover kit needs jumpers on all but the outer two positions of the header closest to the reset button for jtag to work. (The positions are labeled TMS, TDO, TDI, TCK and S_TDI.) Do you have these jumpers populated?

[imtiaz]

Yes - I had the jumpers on.

[ESP_Sprite]

Hmm. Do you have anything connected to the pins of the devboard?

[sameer]

I'm having the same issue. Nothing is connected to the board besides the shorting blocks (jumpers) at
USB 5V
JP8: TMS, TDO, TDI, TCK
JP11: RX & TX
JP14: CTS & RTS

Console output:

sameer@testWROVER: /opt/gnuarmeclipse/openocd-esp32$ ./src/openocd -s ./tcl -f ./esp32.cfg

Code: Select all

Open On-Chip Debugger 0.10.0-dev-g1bc90a1 (2017-06-08-00:39)
Licensed under GNU GPL v2
For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
none separate
adapter speed: 200 kHz
force hard breakpoints
Error: no device found
Error: unable to open ftdi device with vid 0403, pid 8a98, description '*', serial '*' at bus location '*'
Error: libusb_open() failed with LIBUSB_ERROR_NO_DEVICE
Error: no device found
Error: unable to open ftdi device with vid 0403, pid 6010, description '*', serial '*' at bus location '*'

Please advise ...
Thanks for your time.

[ESP_Sprite]

Sounds like your user doesn't have rights to the USB device. Can you retry running that as root? If it succeeds, you should take steps using udev to make sure your user can access the FTDI chip we use.

[sameer]

Thanks for the quick reply.

I tried the same command with sudo, but the same issue persists

sameer@testWROVER:/opt/gnuarmeclipse/openocd-esp32$ sudo ./src/openocd -s ./tcl -f ./esp32.cfg

Code: Select all

Open On-Chip Debugger 0.10.0-dev-g1bc90a1 (2017-06-08-00:39)
Licensed under GNU GPL v2
For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
none separate
adapter speed: 200 kHz
force hard breakpoints
Error: no device found
Error: unable to open ftdi device with vid 0403, pid 8a98, description '*', serial '*' at bus location '*'
Error: libusb_open() failed with LIBUSB_ERROR_NO_DEVICE
Error: no device found
Error: unable to open ftdi device with vid 0403, pid 6010, description '*', serial '*' at bus location '*'

And to make sure it's not a device connectivity issue, I used GtkTerm to make sure I can see the device output (I added a printf to the blink example project), and it worked just fine.

sameer@testWROVER:/opt/gnuarmeclipse/openocd-esp32$ gtkterm -p /dev/ttyUSB1 -s 115200

gtkterm.png (32.1 KiB) Viewed 20147 times

Am I missing something?

[ESP_Sprite]

Can you do a 'lsusb' and post the output here?

[sameer]

Ok ... it took some time, but I figured it out.

I was having problems due to three distinct issues
A) I didn't realize that OpenOCD needed the D2XX FTDI API
B) D2XX as a user-space API conflicts with the kernel-space driver that my Linux OS automatically loads upon connecting the WROVER-KIT, so I had to follow the instructions given in this readme by FTDI regarding unloading the driver. Specifically:

Code: Select all

If "ftdi_sio" is listed:
        Unload it (and its helper module, usbserial), as follows.

        sudo rmmod ftdi_sio
        sudo rmmod usbserial

I had to unload those two drivers every time I connected the WROVER-KIT.
C) I am using an LXC container, which did not have access to the device (it only had access to the serial files ttyUSB0 and ttyUSB1, which is why I was able to use GtkTerm with no issues). I used this guide to fix this problem.