i.MX6UL Initial Load

[vandoornum]

I have a board with a i.MX6UL processor. UART1 is the only serial boot interface connected on the board. I was wondering what the standard procedure for initially loading u-boot or a first stage bootloader (FSBL) onto the system is.

I can communicate with the chip through the serial download protocol but I am having trouble transferring a file of more than 2kB (the protocol just seems to stop responding).

I have tried using the program at https://github.com/boundarydevices/imx_usb_loader with little success.

The JTAG port is available on the board.

Any advice that could be offered on how to go about initial load would be greatly appreciated.

[igorpadykov]

Hi Jay

for jtag usage one can look on

AN5229 ARM DS-5 Development Studio Debug i.MX6UL-EVK

https://www.nxp.com/docs/en/application-note/AN5229.pdf 

or write own application loading code through uart using sect.8.9.3 Serial Download protocol

i.MX6UL Reference Manual

http://www.nxp.com/docs/en/reference-manual/IMX6ULRM.pdf

Best regards
igor
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