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riscv_usb
Sylvain Munaut c5c853b4b2 projects: Cleanup some common code between projects %!s(int64=2) %!d(string=hai) anos
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data 903ae87b18 projects/riscv_usb: Set clock to their real frequency %!s(int64=4) %!d(string=hai) anos
fw c5c853b4b2 projects: Cleanup some common code between projects %!s(int64=2) %!d(string=hai) anos
rtl c5c853b4b2 projects: Cleanup some common code between projects %!s(int64=2) %!d(string=hai) anos
sim f560755b26 projects/riscv_usb: Add support for the user button %!s(int64=5) %!d(string=hai) anos
Makefile fc12f0de48 projects/riscv_usb: Move the USB stuff to a separate module %!s(int64=4) %!d(string=hai) anos
README.md 9cf400b9ad projects/riscv_usb: Import RISCV + USB prototype %!s(int64=5) %!d(string=hai) anos

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