Firmware image (swicwe tools) - ADC channels read failed (bad values)

Legato Linux distribution (Yocto project)
1

Hello Forum,

If I download my firmware created by swicwe tool, I can not read the ADC inputs (Bad values).

I try to create a test firmware using the following SWI files availables on source.sierrawireless.com/resources/legato/wpfirmwarerelease web site.

  • wpfw122/mcufw_001.005.cwe
  • wpfw122/boot-yocto_wp85.cwe
  • wpfw122/legato.cwe

root@swi-mdm9x15:~# cm adc read EXT_ADC0
EXT_ADC0:24758
root@swi-mdm9x15:~# cm adc read EXT_ADC1
EXT_ADC1:41509

If I use the following file “9999999_9904559_SWI9X15Y_07.11.11.00_00_GENERIC_001.026_000.spk” available on your site, There is no problem.
Correct values can be read:

root@swi-mdm9x15:~# cm adc read EXT_ADC1
EXT_ADC1:1654
root@swi-mdm9x15:~# cm adc read EXT_ADC0
EXT_ADC0:8

Can you explain the differences between the two firmwares and the elements that fix the problem of ADC reading ?

This is problematic when I download my final firmware in my factory (Production tests failed).
I am therefore obliged to go through an additional step which consists in loading the 9999999_9904559_SWI9X15Y_07.11.11.00_00_GENERIC_001.026_000.spk file before the final firmware.

When we received the WP85 modules from SWI, the release pre-installed is: 11.

Thanks very much for your help,

2

Presumably you used swicwe to build an spk file because you have customized either yocto or legato. Which components did you modify and which version did you use as a baseline?

3

Thanks for your reply,

As I explained in my previous post, I tested with the images files available in https://source.sierrawireless.com/resources/legato/wpfirmwarerelease/ without modifications.

Generated ipk firmware from Sierra’s cwe files:

  • MCU (001.005)
  • Yocto (SWI9X15Y_07.11.09.00)
  • Legato (16.07)

With my custom firmware, the problem is the same.
The reasons why I made a custom firmware:

  • Custom hardware (No dev kit Mangho),
  • Specifics drivers,
  • Add customs and additional Yocto recipes.

Thanks,

4

For info,

If I download my firwmare after a first download of the 9999999_9904559_SWI9X15Y_07.11.11.00_00_GENERIC_001.026_000.spk, ADC works.

5

Sorry for the confusion. My understanding is that you tried to build an SPK using the following:

  • mcufw_001.005.cwe
  • boot-yocto_wp85.cwe
  • legato.cwe

The created file will differ from WPx5xx_Release-12.2_GENERIC.spk in that your SPK will not include the Firmware-Generic component. This means that you will be running whatever modem firmware was installed in your module prior to installing your SPK. I think what you probably want to do is create an SPK that uses all 4 components:

  • 9999999_9904559_SWI9X15Y_07.11.11.00_00_GENERIC_001.026_000.spk
  • mcufw_001.005.cwe
  • boot-yocto_wp85.cwe
  • legato.cwe

Because of your customized board, you probably want to replace the boot-yocto_wp85.cwe with your own and possibly the legato.cwe as well if you are deploying custom apps.

6

Thank you for your answer.

If I summarize, in my custom SPK file:

  • 9999999_9904559_SWI9X15Y_07.11.11.00_00_GENERIC_001.026_000.spk (Provided by SWI),
  • mcufw_001.005.cwe (Provided by SWI),
  • My custom boot-yocto_wp85.cwe image,
  • My custom legato.cwe.

I did not include the 9999999_9904559_SWI9X15Y_07.11.11.00_00_GENERIC_001.026_000 file today.
Tomorrow morning, I try on new device with missing 9999999_9904559_SWI… file.

Thanks,