WP7608 failed to boot

Legato Linux distribution (Yocto project)
1

I have a WP7608 board that was working fine. After using uartMode command to change uart mode and reboot, the board failed to boot with the following logs:
B - 786839 - QSEE Execution, Start
D - 884 - QSEE Execution, Delta
B - 793549 - SBL1, End
D - 681278 - SBL1, Delta
S - Throughput, 8000 KB/s (1182136 Bytes, 135260 us)
S - DDR Frequency, 240 MHz
Android Bootloader - UART_DM Initialized!!!
[10] ERROR: No devinfo partition found
[10] Neither ‘config’ nor ‘frp’ partition found
[10] ERROR: No misc partition found
[1140] SSMEM init OK[1150] ssmem_get: region 20 not exists[1230] DEBUG: cmdline has root=
[1360] Channel alloc freed

I searched the internet for the solution and these what i have tried but do not help:

swiflash -m “wp76xx” -i image.spk
This command failed with error “Failed to enter download mode”

Connect TP1 to GND, boot the board, and run
swiflash -m “wp76xx” -i image.spk
the command went further and reboot the board, but on the console i see the same logs above after the reboot.

Connect TP1 to GND, boot the board, and run
swiflash -m “wp76xx” -r
the command ran for a few hours and nothing happen. I terminated the command and tried the flash the image again, but it did not help.

I have no idea what else i can do. Please let me know how to proceed further to recover the board. Thanks

2

do you have the USB port connected to PC?
Can you access the AT command port in USB?
If yes, what is the return of AT!MAPUART?

3

I have USB port connected to my PC and I am using minicom to access /dev/ttyUSB0 with “115200 8N1”. I tried to enter the AT command, but it does not respond to my keystroke.

4

that is not USB port from module, that is UART port only…

5

When I attach Sierra Wirelese WP7608 to the VM, i see 3 ports /dev/ttyUSB0-2. I tried minicom on all 3 but none of them work. On windows side, i see DM and NMEA ports. I use putty on DM port but get no response. I also try NMEA port and putty is showing something like GPRMC, etc. but does not take the keystrokes. Can you give me the hint on how to run AT command?

6

In windows, there should be one modem port in device manager

7

This is what i see in windows
image

8

I mean modem , not “port”

9

Thank you for the post. It is COM9. The output is:
image

10

Uart1 is linux console
Uart2 is in data mode now

You can change it according to AT command user guide

11

Thanks. I got it back