Hello everyone,

i'm trying to find a way how i can force the FX3 on the DVK to do a cold reset and reboot from an i2c eeprom.

I'd like to do this via a ep0 control transfer. I'd basically want to know what commands the 'DownloadFx' function is using to reset the FX3 after downloading new firmware into RAM.

I'm trying to optimize eeprom programming for production:

1. fresh FX3 with blank eeprom boots into USB bootmode

2. I'm loading the example USBFlashPlog image into the FX3 using the .NET library's DownloadFw function

3. The FX3 reboots into the FlashProgrammer. I'm programming my USB VID/PID into the FX3

Now i want the FX3 to reboot and re-enumerate with my VID/PID pair into USB bootmode.

The .NET calls 'ReConnect' and 'Reset' only seem to do a warm reset, since the FX3 keeps the IDs from the FlashProg.

If i hit the reset button on the DVK, the FX3 boots with my ID pair.

Anyone got any ideas?

Regards

Booting from contents in the EEPROM happens only on hardware reset. I don't think you would be able to achieve it through firmware.

By the way please let me know what is the reason behind this requirement?

Regards,

Anand

Hi,

did you try CyU3PDeviceReset(false) ?

Regards!

 My reason behind this is that i'd like to make initial programming of our new modules more automated.

I'm starting with an empty eeprom and the FX3 in USB bootmode and would like to end with a programmed eeprom with my ID pair and the FX3 with those IDs in USB bootmode.

I'd like to do that without replugging/cutting power the FX3 and only 1 application.

So far, all of the above works except the hard reset after i programmed the eeprom with my IDs.

I have expanded the USBFlashProg example with a vendor request which calls CyU3PDeviceReset(CyFalse); but that doesnt seem to do a hard reset either. 

Hm ... according to API-guide it should work with CyU3PDeviceReset(false): "If the warm boot option is selected, the
firmware in the FX3 RAM shall be maintained otherwise it shall be discarded and freshly loaded."

2nd option would be to wire a GPIO to #Reset-pin of FX3 and pull the GPIO to LOW to execute a hard reset.

 I must have done something wrong expanding the example with CyU3PDeviceReset.

It does work now and it also causes the FX3 to fetch the new IDs from the eeprom, so that's good.

Going to give the .NET functions another try.

Hello,

I have added CyU3PDeviceReset function to my firmware and I have next results:

cold reset - resets and renumerate device, but device doesn't start up from SPI and appeers in "Device Manager" as BootLoader.

warm reset - device disappears from Device Manager.

Please comment. Thank you in advance.

Regards

Hello,

I have found problem, it was in connected pereiphery.

Regards