IMX6ULL/VIOLA boot over UART in recovery mode

[ge73for]

Hallo Team,

I am trying to boot my board via UART. I use the u-boot from the pre-built images. I am using the following application : https://github.com/boundarydevices/imx_usb_loader.

The device is brought into the recovery mode(by shorting the pins). The following command is run : "./imx_uart -n /dev/ttyUSB0 mx6ull_usb_work.conf u-boot.imx". Ideally the board(in recovery mode) should respond and then boot.

The UART A of the viola board is used , with the RTS /CTS pins shorted.

The output is the following :

trailing slash == 0x5579de0d2161:/imx_uart checking with conf_path /usr/etc/imx-loader.d/ checking with base_path ./ config file <.//mx6ull_usb_work.conf> parse .//mx6ull_usb_work.conf starting associating phase.......... magic missmatch, response was 0x00000000

From the above i can infer that the board is not responding.

When not in recovery mode , if i run the command there is no mismatch and the board seems to respond.(But the u-boot does not load and by my understanding it should not).

1. Does the IMX6ULL support UART-boot in recovery mode ?

2. Is there any other connections or settings which must be performed for the UART-Boot to function ?

When the board is in recovery mode and the command "./imx_usb u-boot-nand.imx" is run , the board boots and hence the USB option works.

Thank You

[igorpadykov]

Hi Kavya

pre-built images may not work on custom board, for custom board first

recommended to run ddr test i.MX6/7 DDR Stress Test Tool V3.00 

and update image with new ddr calibration coefficients placed in uboot/board/freescale/

mx6ullevk/imximage.cfg

Usb_loader usage is described on

i.MX USB Loader 

Best regards
igor
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[ge73for]

Hallo Igor,

Thank you for the reply. I should have probably mentioned earlier , that the board i am using is the Colibri IMX6ULL with the Viola carrier board(V1.2).

Would ddr test be required in this case ?

The link shared by you seems to be about USB loader which works for the board.

The board works with the imx_usb. I am trying to boot the board over the UART.

Thanks & Regards,

Kavya

[igorpadykov]

Hi Kavya

Colibri IMX6ULL is not supported by nxp, issue may be posted

on its vendor forum :

Welcome to - Toradex Community 

Best regards
igor

[ge73for]

Hallo Igor,

Thank you. I have also posted in the Toradex Forum. The Colibri IMX6ULL is based on the NXP IMX6ULL System-on-Chip . so i wanted to know if booting over UART works for the NXP IMX6ULL .

Thanks & Regards,

Kavya B C

[igorpadykov]

Hi Kavya

yes booting over UART works for the IMX6ULL.

Best regards
igor

[ge73for]

Hallo Igor,

Could you please let me know about the steps and the connections followed ? 

Thanks & Regards,

Kavya B C

[igorpadykov]

Hi Kavya 

NXP does not support booting over UART in its bsps (it is supported

by some third parties like boundary devices via imx_usb_loader tool).

NXP does not support imx_usb_loader tool. Supported loading using MFG Tools,

description can be found for example on below presentation:

 Manufacturing Tools for i.MX Applications Processors AMF-ACC-T1652

AMF-ACC-T1652 

For issues related to Colibri IMX6ULL with  imx_usb_loader tool suggest to

post issue on forum :

Welcome to - Toradex Community 

Best regards
igor