Unable to flash certain Colibri T20 modules

We normally flash our custom linux image (based on V2.3) onto the Colibri T20 modules with the provided ‘update.sh’. This has been working for at least over 400 modules.

However in the latest lot of 20 modules there were 2 modules which stopped at ‘waiting for bootloader to initialize’.

These 2 modules seem to be from a different production lot. Their serial numbers are 10707188 and 10707187, whereas the serial numbers of the 18 working modules all start with 066xxxxx.

Here the flash log:

vo@PC033:~/Schreibtisch/xbbz4v-image-Colibri-T20_V1.0r6$ ./update.sh -r 512 -v V1_2
Colibri T20 rootfs detected

LD_LIBRARY_PATH=../t20_nvflash ../t20_nvflash
Nvflash version 19.0041 started
rcm version 0X20001
System Information:
   chip name: t20
   chip id: 0x20 major: 1 minor: 4
   chip sku: 0x8
   chip uid: 0x0359b007437ff057
   macrovision: disabled
   hdcp: enabled
   sbk burned: false
   dk burned: false
   boot device: nand
   operating mode: 3
   device config strap: 0
   device config fuse: 4128
   sdram config strap: 0

sending file: ColibriT20_333_512_V1_2_nand.bct
- 4080/4080 bytes sent
ColibriT20_333_512_V1_2_nand.bct sent successfully
odm data: 0x1
downloading bootloader -- load address: 0x8300000 entry point: 0x8300000
sending file: loader.nb0
\ 360208/360208 bytes sent
loader.nb0 sent successfully
waiting for bootloader to initialize

Dear @mv3018 ,

Thank you for your post on Community!

It is indeed strange that you get this error. Have you maybe tried installing a newer version of the BSP? In that case, do you still face the same issue?
Is the Host computer set-up identical while flashing all these modules?

Best Regards,

Hi Janani,
I downloaded the latest V2.8.7 Linux image and could install it on the module. But in the ‘newer’ Linux images > V2.3 you flash the image via sd card. Our custom Linux image is based on V2.3. The script ‘update.sh’ flashes the image directly via USB onto the module, it uses the nvflash utility and a loader.nb0 file.
As for your other question: Yes, all of our modules where flashed with the exact same computer.
Kind regards

This might help:
I found out, that, when the module has been put into recovery mode by software (enterrcm), the flashing of our custom image works !
Whereas, when the module has been put into recovery mode by hardware (our custom board as well as a Colibri Evaluation Board V31a), the flashing does not work !?