Hi,
I am trying to flash QCLI_demo on a QCA4020 board, using Ubuntu and flashing through `flash_openocd.sh`,
but facing error with JTAG:
```
Open On-Chip Debugger 0.10.0
Licensed under GNU GPL v2
For bug reports, read
adapter speed: 100 kHz
Info : clock speed 100 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: QM4.cpu: IR capture error; saw 0x0f not 0x01
Warn : Bypassing JTAG setup events due to errors
Error: Invalid ACK (7) in DAP response
Error: JTAG-DP STICKY ERROR
Error: Invalid ACK (7) in DAP response
...
...
```
I am using default source from QCA_SDK, and all jumpers are setup like tutorial says.
Kindly provide us your arm toolchain version and board picture.
Make sure the JTAG jumpers are accurate.
The above error occurs when the jumper connections are either loose or invalid.
I am using Ubuntu 18.04 and openocd 0.10.0 from a package manager
Here is photo of my jumpers setup:
https://photos.app.goo.gl/JiUDEUS1qnfSQfCW6
The only issue I could observer from the attached picture is missing jumper on J37(pins 2 and 3).
Kindly add jumper to J37 which is on the back of J39 and beside J38.
If the issue still occurs make sure the jumper cables are valid and not broken.
Error: Invalid ACK(7) in DAP response indicates either of the JTAG clock/ Data In or Mode select is not configured properly.
Ok, thanks.
I was able to flash board.
Next problem that I facing - demo not starting. There is nothing in console.
I removed J31 jumper, and power cycle board, but still nothing happens.
I assume you made a successful build and flashed the image.
Kindly perform the below intructions and let me know if you still face any issue:
> export BOARD_VARIANT = cdb
> export RTOS = threadx
> expor t CHIPSET_VARIANT = qca4020
> make
>flash_openocd.sh
Remove the jumper on 31, power cycle the device and open serial console using higher port with baudrate 115200.