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tillitis / tillitis-key1

Board designs, FPGA verilog, firmware for TKey, the flexible and open USB security key 🔑
https://www.tillitis.se
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possible compatible hardware: FOMU #144

Closed coelner closed 1 year ago

coelner commented 1 year ago

Maybe this is also a capable device to use:

https://tomu.im/fomu.html https://www.crowdsupply.com/sutajio-kosagi/fomu#products https://workshop.fomu.im/en/latest/background.html

FPGA: Lattice ICE40UP5K
Speed: 48 MHz external oscillator
RAM: 128 kB RAM for a soft CPU¹
Storage: 2 MB SPI flash
Connectivity: USB 2.0 FS (12 Mbps)
Buttons: Four
LEDs: One RGB

rel: https://github.com/tillitis/tillitis-key1/issues/141

The CH552 is missing, but AFAIK it is integrated into the FPGA via tinyUSB (https://github.com/hathach/tinyusb)

secworks commented 1 year ago

Hi!

Yes, the FOMU is close to the TKey1 in terms of functionality. Unfortunately, you will not be able to fit the TKey1 FPGA design and the TinyUSB core in the same device. We looked at using TinyUSB or another open FPGA based USB solution on the TKey1. (One can still see this in the name "application_fpga" for the FPGA design in TKey1, there would have been an "interface_fpga" in front of it. Due to reliabilty issues and time constraints, we had to change to the CH552.)

coelner commented 1 year ago

Well, too bad. But thanks for the explanation.