PN7462 updating EEPROM on linux

[roque]

Hi everyone,

I'm trying to update the PN7462 EEPROM by USB Mass Storage Mode on linux, but it is not working.

I'm using mount command to mount it as flash driver, erasing DRP_<nn>.dat file, loading my user_ee.bin file into it, umounting the partition and pressing RST_N button. After that I upload my application (on linux as well) and it's not working.

If I update the EEPROM using Windows it works, even loading my application on linux.

[thiago_machado]

 I was able to see the PN7412 as a mass storage device in UBUNTU 20. We are using a i.MX 8M Nano in our project, and the main goal is to update the PN7412 thru the i.MX USB bus. I couldn't manage to make it work on i.MX with the same steps listed here. I'm sending the dmesg output in the attachments. You guys have any idea what might be missing?

[jimmychan · Accepted solution]

Share the feedback from a customer who met the same issue on linux.

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The solution was change some configs in the computer, and use the “dd” cmd in the sector programmed instead of “cp” and “unmount” to copy files.

Following those steps:

1 – unload the module usb-storage, and cmd “modprobe usb-storage quirks=1fc9:0117:r,n,m”

2 – “dd if=pn/user_ee.bin of=/dev/sdc seek=03 (to copy the  EEPROM)

There are several programmers with the same issue in the community, please, share with them

[CharlieTech]

Great!

This solution worked for me. I'm using a LPC11U37F on Linux, my solution was change the seek=3 to seek=4. 

– “dd if=pn/user_ee.bin of=/dev/sdc seek=04

[Manolo23]

 Great!,

This solution worked for me. I'm using a LCP11U37F on Linux, my solution was change the seek==3 to seek==4. 

– “dd if=pn/user_ee.bin of=/dev/sdc seek=04

[thiago_machado]

Hi Jimmy. In order to update the flash memory with a new firmware, what would be the steps to make so? I'm devoloping a SAM Card interface, that will be connected to a iMX8M Nano thru USB bus. It's firmware must be updated remotly, so in order to avoid devoloping a secondary bootloader, I'm trying to make it work using the primary. Is it possible? If so, I believe that the seek option must be different that the one you posted before. To develop the firmware, I'm using the MCUXpresso.