Coldstart problem. Loading FPGA through Linux.
Added by Sergey Volkovoy almost 3 years ago
Hello everyone,
we use the MitySOM module in our project. In works perfectly fine down to -40°C but only if the FPGA is booted at the ambient temperature above 0°C. The HPS part is not used in the project, it`s needed only for booting from SD card.
I connected the cable to UART0 of the HPS and I found that if the ambient temperature is lower then 0°C we have an error with RTC.
mousedev: PS/2 mouse device common for all mice␍␊
rtc-ab18xx: probe of 0-0069 failed with error -5␍␊
i2c /dev entries driver␍␊
lm73 0-004c: sensor 'lm73'␍␊
and further:
hwclock: can't open '/dev/misc/rtc': No such file or directory
could it be that because of this we have an issue with downloading or starting the FPGA part?
we use the industry grade module and the RTC is not really needed for the proper operation.
Replies (1)
RE: Coldstart problem. Loading FPGA through Linux. - Added by Daniel Vincelette almost 3 years ago
Hello,
I don't believe the RTC error message is related to the FPGA not programming. Can you post a boot log when trying to boot at -40°C? Also just to double-check are you using an industrial temp SD card?
Best regards,
Dan
