Merge tx debug branch into main

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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Merge tx debug branch into main #155

Open dehanj opened 8 months ago

dehanj commented 8 months ago

In the branch uart_tx_debug_pin is a proof of concept of a tx debug pin using GPIO4. The idea is to have a way of sending serial data that does not interfere with the common serial data of the USB. A bit as the qemu_* output, but on the actual target.