2 Replies Latest reply on Jul 18, 2013 8:53 AM by gayathriv_16

FX3 I2C-Boot with USB-Fallback

user_181975905 Aug 18, 2017 2:16 PM

I am booting from I2C with fallback to USB. I have flashed the I2C-Chips (AT24C1024B) with the "USB Control Center". After Power-On the FX3 boots my firmware from the I2C-Chips. But when I am asserting reset (the pin) after booting my firmware, the FX3 falls back to the "Cypress USB Bootloader". Somehow this behavior is very practical for development, but I do not understand it. Why does the FX3 not boot my I2C-Firmware again? Is there any documentation that describes this behavior?

1. Re: FX3 I2C-Boot with USB-Fallback

user_181975905 Jul 9, 2013 1:22 AM (in response to user_181975905)

I have solved this problem. I have a FPGA connected to the I2C that corrupts the bus under some circumstances. That is why the board did boot via I2C after Power-On (FPGA not loaded) but not after reset (FPGA loaded).
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2. Re: FX3 I2C-Boot with USB-Fallback

gayathriv_16 Jul 18, 2013 8:53 AM (in response to user_181975905)

Thank you for posting :)



Regards,

Gayathri
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