topic Re: How to boot from parallel nor flash on IMX6SoloLite in i.MX Processors

How to boot from parallel nor flash on IMX6SoloLite

fisherhe — Tue, 27 Oct 2015 05:43:54 GMT

HI,

I use imx6sololite, and I have tested that my board can boot from SD card and SPI Flash, also I can read and write parallel nor flash(use EIM bus) when boot from SD card correctly.

But when I use MFG Tool to download the uboot and kernal to nor flash, it failed. I know that because the official EVK of imx6sololite has no paralled nor flash, and the MFG Tool

can't support ubooting from nor flash. And I found that IMX6Q-AUTO has paralled nor flash support. So the question is:

How to config a MFG Tool that can support parallel nor flash on IMX6Sololite？Or is anyone has tools already?

Also, a emergent way to solve the problem temporarily is to boot from SD card, then write the boot code to nor flash. I try that way, but when I wirte the boot code to flash,

switch the boot mode to flash boot. it failed too.Because the boot doesn't start, it can't get any information from UART, so I don't know where it stops.

Thanks!

Re: How to boot from parallel nor flash on IMX6SoloLite

igorpadykov — Tue, 27 Oct 2015 10:48:27 GMT

Hi Fisher

regarding non-booting, one can check boot connections in

Table 8-10. EIM IOMUX Pin Configuration i.MX6SL Reference Manual (rev.2 6/2015)

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6SLRM.pdf

For example non-muxed mode uses LCD_DAT pins and bus isolation buffers

should be used as shown on attached i.MX6SL EVK spf-27452 p.13 (U21-24).

It is recommended to check with oscilloscope nor signals.

Regarding mfg tools support one can reuse nor profile from sabre auto

configuration, rebuilding mfg tools firmware with specific board modifications:

ddr settings, nor support, e.t.c. For flashing nor one can look at attached Linux Guide

sect.4.4.1.4 Flashing U-Boot on Parallel NOR from U-Boot, for rebuilding mfg tools:

Yocto Guide sect.6.2 Manufacturing Tool, MFGTool.

Best regards

igor

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Re: How to boot from parallel nor flash on IMX6SoloLite

fisherhe — Tue, 27 Oct 2015 23:55:54 GMT

Hi,Igo,

Thank you for your reply!!

Because it is a emergent case, I use another way temporarily. Because I have boot SD card sucessfully, so first I boot from SD card,

and then download the boot image to nor flash, switch the boot mode to nor flash boot, restart the board. It fail to boot. And I found that

when the board power on, the CS0 signal was not be pulled low.I think the imx6sl doesn't find the correct boot device. But I have check

the pins to config the boot mode,that is, BOOT_MODE[1:0]--01, BOOT_CFG1[7:4]--0000, BOOT_CFG1[3]---0, BOOT_CFG2[7:6]---01.

I don't know what to do now. By the way,I can write and reda from nor flash(SST39VF3201C) correctly when boot from SD Card, but I have not added bus isolation buffers for nor flash. I find that CS0 doesn't need a isolation buffer.

Re: How to boot from parallel nor flash on IMX6SoloLite

igorpadykov — Wed, 28 Oct 2015 01:41:59 GMT

Hi Fisher

one can connect jtag and check boot settings in SRC_SBMR1,2

~igor

Re: How to boot from parallel nor flash on IMX6SoloLite

fisherhe — Wed, 11 Nov 2015 06:02:38 GMT

Hi,Igor,

Problem has been solved.

First, there is some hardware problem which cause the signal of EIM stop working.

Then, the software tool for downloading is not right.

Thank you very much!