How uboot can be written over NOR Flash using UART

[adityanagal]

Hi ,

I am working over the IMX6 solo which is interfaced with serial NOR Flash. As per the Reference Manual , Table 8-1 ,

Serial Downloader mode can be used for firmware flashing. But Serial Downloader mode requires serial USB. In my target board USB board is not populated. My questions are as follows :

1. Can I flash uboot using debug UART ?  if yes then please explain how .

2 . In which mode IMX6 will boot up to write the NOR Flash using UART.

Please suggest.

Regards,

Aditya Nagal

[weidong_sun]

Hello Aditya,

>>1. Can I flash uboot using debug UART ?  if yes then please explain how .

No, you can't.

>>2 . In which mode IMX6 will boot up to write the NOR Flash using UART.

I.MX6 doesn't support downloading uboot by UART port.

There are 2 ways to write u-boot to your nor flash:

(1) writing u-boot to NOR Flash by USB OTG port.

You had better populate USB OTG connector to your board, it is very important, I don't know why not populate it.

(2) Using SD card to boot your system, then write u-boot image to Nor Flash.

Hope above advice can help you!

Best Regards,

Weidong