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Hi Guys,
This post is a bit wired, I tried several stuff, but still nothing improving the situation.
I did developped a BCM20737S application, this application works well. We were moving this project to production, the first prod was 50.
From production I did get back 13 board where they can't do something with it. (hopefully we purchase 100 boards, so 50 are working 100%, 13 doesn't what I discribe below)
So we can :
- Download the code through the chipload and the script, this succed.
- When I do this, the chip lunch the app, stop printing something on the UART after 3-4 sec and then reboot.
- we have a bi color LED on GPIO 24 and 25, these output are high and the LEDs switch ON, which isn't normal as other board doesn't do this.
From this, I take the board, try to flash then though SDK.
- I can't Download neither recover.
- I try to download and recover all 13 board, nothing.
- From this I tried to flash with the script and this still succed.
I had once a problem with the boot sequence and I had to change the PMU crystal warm up tp 5000, this doesn't help in this situation.
I have a I2C chip to do DAC function, I tried to remove it, then I try to remove the pull up, still I can't download or recover.
I did test the recover on a board that works and I can do a recover.
I do have pull up 100k, this will be changed in the following BOM, but still if I remove them, I can't flash.
PS : I can send anything MP if needed, but I wont post code or something like this public.
Thanks for the reply !
- Labels:
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FlashEEPROM
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Recovery