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Firmware update (change to USB Boot Mode by software?)
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Firmware update (change to USB Boot Mode by software?)

ProHerz posted on 02 Aug 2012 5:21 AM PST
Member
8 Forum Posts

Hi,

I have configured the Boot Mode to "SPI, USB on failure". If i want to update the firmware, i have to change the configuration on the PMODE pins to "USB" boot. I'm now asking myself if there is a possibility to download the firmware without changing the PMODE pins? I mean for developemnt it's not a problem. But if we deliver the device and the customer should set some jumpers or press a button to make a firmware update, this wouldn't be very nice. Can we do something by software?

 

Best regards

Walt

Re: Firmware update (change to USB Boot Mode by software?)

RSKV posted on 02 Aug 2012 06:21 AM PST
Cypress Employee
655 Forum Posts

Yes. We can do that.

You can develop a small application in the PC to send a specific vendor command (let say Cmd_to_Erase) to FX3.

Your application firmware should be supporting this command. When FX3 gets the required vendor commad then do erase the signature of the image file that is stored in the SPI EEPROM. And when the end user hits the reset (disconnect and connect it back) then FX3 bootloader falls back to USB since there is some invalid image in the SPI EEPROM. Then user can re-program it.

Regards,

sai krishna.

Re: Firmware update (change to USB Boot Mode by software?)

ProHerz posted on 02 Aug 2012 06:42 AM PST
Member
8 Forum Posts

Hey Sai,

thanks for your reply. That's a good idea and i will try it that way.

Best regards

Walt

Re: Firmware update (change to USB Boot Mode by software?)

Chris R. posted on 02 Aug 2012 10:34 AM PST
Top Contributor
135 Forum Posts

If you implement a vendor comand to erase the first bytes of SPI flash, you can implement the whole code to erase all the flash content and write the new firmware image to the flash. I think this is only a very litte more work...

Re: Firmware update (change to USB Boot Mode by software?)

ProHerz posted on 03 Aug 2012 11:20 PM PST
Member
8 Forum Posts

Hi Chris,

Yes you are right. Thank you.

Best regards

Walt



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