riscv.blink

It blinks the LED

Dependencies

Assuming you are using Ubuntu or Debian Linux, you will need:

1. riscv-unknown-elf cross compiler (see ../../README.md)

2. udev rule allowing read and write permissions for your OrangeCrab 25F or 85F (see ../../README.md)

3. dfu-util (you can install with sudo apt install dfu-util)

Building & Loading for OrangeCrab 85F with gcc 13

1. Generate a riscv binary and create a dfu update image:

   $ make blink_85F.dfu

2. Make sure the OrangeCrab 85F is in DFU mode by plugging in the USB cable while holding down the button. You can check for a DFU device with lsusb or dmseg. You may need to add a udev rule to give the plugdev group permissions for 1209:5af0 if you have not already done so. You also need to have dfu-util installed (e.g. sudo apt install dfu-util).

3. Load the new firmware into the -d 1209:5af0 --alt 0 DFU device with

   $ make dfu_85F

Building & Loading for OrangeCrab 25F

1. Generate a riscv binary and create a dfu update image.

$ make all

2. Enter the DFU bootloader by holding the button while connecting OrangeCrab to your USB port

3. You can validate that the OrangeCrab is in DFU mode using dmesg

    usb 1-1: new full-speed USB device number 63 using xhci_hcd
    usb 1-1: New USB device found, idVendor=1209, idProduct=5bf0
    usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    usb 1-1: Product: OrangeCrab r0.2 DFU Bootloader v2.0.3-13-g84c820a
    usb 1-1: Manufacturer: GsD

4. Load the RISCV firmware we've just built using

$ make dfu