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Ok, now I'm stuck on the Winbond SRAM not found error too. I tried most of the suggestions relating ...
# mpw-2-silicon
m
Ok, now I'm stuck on the Winbond SRAM not found error too. I tried most of the suggestions relating to power.
s
Facing same issue.
d
In Flash.py, enable debug to get more debug message def erase(debug=False): => change it to def erase(debug=True):
s
Screenshot from 2023-01-21 20-37-57.png
What could be the possible reason for this?
m
I get this error:
Copy code
*** flashing Caravel

Caravel data:
   mfg        = 0456
   product    = 11
   project ID = 00000000

Resetting Flash...
status = 0xff

JEDEC = b'ffffff'
Winbond SRAM not found
MicroPython v1.19.1-616-g5987130af-dirty on 2022-11-20; NUCLEO-F746ZG with STM32F746
I'm also following the issue but there doesn't appear to be a clear answer: https://github.com/efabless/caravel_board/issues/16
s
The behavior is not same for every part. I got one part to pass this error. Also there is difference in successful io config of same part with different runs.
d
@Matthew Guthaus You able get mfg & product value correct means, your nucleo to caravel spi interface is working, failure are between caravel <=> SPI flash access. You can comment out below command in flash.py inside erase subroutine slave.write([CARAVEL_PASSTHRU, CMD_RESET_CHIP]) See atleast first flash access JEDEC return 0xef4016
y
@Sajjad Ahmed what did you do to fix the errors?
s
@Yatharth Agarwal the error is not same for every chip. I have tried running diagnostic on different chip and got some IOs to pass the diagnosis.
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