Re: How you program your sdcard / mmc

[Eric Nelson <eric.nelson@boundarydevices.com>]

Hi Andrea,

On 04/14/2015 08:39 AM, andrea@perpic.it wrote:
> Il giorno mar, 14/04/2015 alle 14.55 +0200, Andrea ha scritto:
>> Hello everybody,
>>
>> I think this is an off topic post but it's a while I'm googling for this
>> subject and I cannot find any useful information.
>>
>> This is my question:
>> I would like to use an eMMC card on the board. So it is soldered on the
>> board and directly connected to the IMX53. I think the same is for flash
>> or other non volatile memories...
>> How do you first program them with u-boot and linux/android for the
>> first boot?
>>
>> Thank you to everyone who want to share the way they operate or some
>> best practice link.
>>
>> Andrea
> 
> Thank you Otavio, Gary, Fabio for your replies,
> I'm a bit confused about the mfgtools, I'm trying to find a windows
> computer to test. My laptop comes with windows 8 preinstalled and the
> program crash when I try to select the USB port. On all the other
> computers I have linux installed.
> 
> Regarding the various solution with u-boot. The part that is not clear
> to me is: I need to have u-boot on sdcard otherwise the imx53qsb doesn't
> boot. Where do you place u-boot? On a USB drive? I saw on the datasheet
> that I can use eMMC, SD and NAND or Hard Disks via PATA/SATA. USB is not
> in there. 
> My question is: When I have a brand new board with the eMMC memory
> soldered on. How can I install there u-boot and all the rest of the
> system? I can't make u-boot install anything, because it's not there
> yet.
> Can someone explain it better?
> 

This is a separate question: "how do I load initial code onto my
machine?"

In general, you have two options:
	- JTAG
	- serial download

We generally use the latter, and on i.MX6, we use the USB OTG interface
for this, along with the 'imx_usb' program as described here:

	http://boundarydevices.com/unbricking

In essence, we use imx_usb to load U-Boot, then USB Mass Storage to
program the eMMC.

You can also use a UART for the initial load, but the process is more
complicated, and you need a different app for that (specialized terminal
emulator).

Regards,


Eric