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riscv_usb
Jakub Duchniewicz 30e995fcc2 Add timer expiring in SW. hai 4 días
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data 773483ddac faster clocks for synthesis (not changing actual freq) hai 1 semana
fw 30e995fcc2 Add timer expiring in SW. hai 4 días
rtl 30e995fcc2 Add timer expiring in SW. hai 4 días
sim f560755b26 projects/riscv_usb: Add support for the user button %!s(int64=4) %!d(string=hai) anos
Makefile a310b26df0 add initial version of button logic + dummy usage hai 6 días
README.md fd6a09e0c2 projects/riscv_usb: Fixup the README hai 1 ano

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

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

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