You need to connect to USB1 (US1) connector to the host computer in order to program the board.

Download and install openFPGALoader for your OS

https://trabucayre.github.io/openFPGALoader/guide/install.html

To upload blink led bitstream, hold BTN1 or turn on DIP SW1 and plug USB.

cd blink
openFPGALoader --dfu --vid 0x1d50 --pid 0x614b --altsetting 0 blink_85f.bit

On linux you may need to add udev rule

https://github.com/emard/ulx3s/blob/master/doc/MANUAL.md#programming-over-usb-port-us1

This blinky is based on the ULX3S-Blinky project from @Doctorwkt. This example blinks an LED using FPGA code.

It is assumed the yosys, nextpnr toolchain has been already installed. If not, see instructions here

First you will need to install verilator

sudo apt-get install verilator

Default size in Makefile is 85F - you can change it here:

https://github.com/ulx4m/blink/blob/main/Makefile#L69

Depending on your version make ls or ld bitstream

make clean
make ulx4m-ls.bit
make prog

make clean
make ulx4m-ld.bit
make prog

Now, you're ready for the next steps, we suggest following:

• https://github.com/lawrie/ulx4m_examples
• https://github.com/lawrie/ulx4m_amaranth_examples
• https://github.com/emard/ulx3s-misc
• https://github.com/emard/had2019-playground/tree/master/projects/bootloader
• https://github.com/goran-mahovlic/mipi-csi-2
• https://github.com/hdl4fpga/hdl4fpga

Or explore different projects available at: https://ulx4m.github.io/

Discord chanel

• https://discord.gg/qwMUk6W (problems/question/general chat)