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kingyoPiyo / Tang-Nano_I2C_Monitor

I2C Bus monitor on Tang-Nano FPGA
MIT License
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Is there a way to restore the CH552T firmware to the original? #2

Closed charkster closed 2 years ago

charkster commented 2 years ago

I could not dump the original CH552T firmware which mimics the FTDI F2232H. I am worried about changing the firmware and not being able to reconfigure the tang nano FPGA in the future. Do you have the original firmware, or is there a method to program the tang nano FPGA with the new serial port firmware? Thank you for any assistance.

charkster commented 2 years ago

I was able to build the new firmware with both serial port and ft2232 emulation. https://github.com/diodep/ch55x_jtag

charkster commented 2 years ago

I needed to connect a 22k Ohm resistor from the Tang Nano's 3.3V pin to the USB D+ line when using the WCHISPTool. No need to use the FTDI software as the CH552 is already in DFU mode.

kingyoPiyo commented 2 years ago

Sorry for the late reply. I am glad to hear that you have resolved the issue.