Wp7502 unresponsive


#1

Hi There

I have a mango red with a wp7502 module. I think i have misconfigured it since i am now unable to connect to it.
I used the pmtool to set bootOn gpio 38 low
and ran a pmtool shutdown

I tested that i could wake the module by connecting pin1 on cn312 to to pin 6 on cn307
(should pull gpio 38 low)’
And that worked fine the first time i tested it.

Then I removed my usb cables (from both serial and usb port and now i am unable to get in touch with the module, I can see that it must be running since it consumes 138 mv power by there is no response neither on serial or usb. (usb dont enumerate at all)

Anyone who has any ideas on how to get in touch with the module again?
Is there a way to perform a factory reset?

Best regards

Kurt


#2

Please try to put the pin #7 of SW401 on your mangOH Red board to “ON” and connect USB cable to your windows PC. You should see DM port for firmware upgrade.
See if it helps.


#3

Hi JordanZhao

Unfortunately I already have tried this without any luck.

Best Regards

Kurt


#4

Hi,

We observed in mango red with only usb cables connected without external power supply.
We ran pmtool commands as mentioned in forum it went to power down mode.connected pin1 on cn312 to to pin 6 on cn307 we are able to reboot and can able to connect.
But once again if we ram pmtool command it is not going to power down mode.
root@swi-mdm9x15:~# pmtool shutdown
Can’t initiate shutdown of MDM

Also We checked with power supply and observed that it is same behavior as above and i removed serial and usb ports and observed that it is running. once when i connect back serial and usb ports we are able to connect via ssh.
When the pin #7 of SW401 on mangOH Red board to “ON” and connect USB cable to windows PC we are able to see DM port an we can flash.

Setup info:
root@swi-mdm9x15:~# cm info
Device: WP7502
IMEI: 357851070003707
FSN: P3653300160703
Firmware: SWI9X15Y_07.11.22.00 r33729 CARMD-EV-FRMWR1 2017/01/11 18:04:06
Bootloader: SWI9X15Y_07.11.22.00 r33729 CARMD-EV-FRMWR1 2017/01/11 18:04:06
priIdPn: 9906352
priIdRev: 01.05
skuId: 1103114
root@swi-mdm9x15:~#