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riscv_usb
Sylvain Munaut c1483f3018 projects/riscv_usb: Update BOARD define for C source to match verilog one 4 years ago
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data 315d7d170e projects/riscv_usb: Add support for the icebreaker-bitsy 5 years ago
fw c1483f3018 projects/riscv_usb: Update BOARD define for C source to match verilog one 4 years ago
rtl c9a5068c7d projects/riscv_usb: Cleanup some unused wires 5 years ago
sim f560755b26 projects/riscv_usb: Add support for the user button 5 years ago
Makefile f560755b26 projects/riscv_usb: Add support for the user button 5 years ago
README.md 9cf400b9ad projects/riscv_usb: Import RISCV + USB prototype 6 years ago

README.md

RISC-V + USB core demo

For the icebreaker, the hardware connections are :

  • P1B4: USB DP
  • P1B3: USB DN
  • P1B2: Pull up. Resistor of 1.5 kOhm to USB DP

To run :

  • Build and flash the bitstream

    • This will build fw/boot.hex and include it as the BRAM initial data

  • Flash the main application code in SPI at offset 1M

    • make -C fw prog_fw

  • Connect to the iCEBreaker uart console (ttyUSB1) with a 1M baudrate

    • and then at the Command> prompt, press r for 'run'. This will start the USB detection and device should enumerate