fmn-toolchain/example/README.md

Example

This directory shows how to flash a system verilog program (A full-adder) on a Zybo xc7z010clg400-1 card.

Build

Firstly, the system verilog file needs to be converted to verilog in order to use it with yosys :

podman run --mount=type=bind,source=.,target=/root/code fmn_alpine sv2v adder.sv -w adder.v

The mount parameter is used to provide to podman the current directory.

Then, yosys can achieve the RTL synthesis of the program :

podman run --mount=type=bind,source=.,target=/root/code fmn_alpine yosys adder.v -p "synth_xilinx; write_json synthesis.json"

Nextpnr can now place and route each components using the xdc constraints file :

podman run --mount=type=bind,source=.,target=/root/code fmn_alpine nextpnr-himbaechel --json synthesis.json -o xdc=adder.xdc -o fasm=out.fasm --device xc7z010clg400-1

Now the fasm file can be converted in a frames file and then in a bitstream :

podman run --mount=type=bind,source=.,target=/root/code fmn_alpine fasm2frames --part xc7z010clg400-1 --db-root /usr/share/xray/database/zynq7 out.fasm out.frames
podman run --mount=type=bind,source=.,target=/root/code fmn_alpine xc7frames2bit -frm_file out.frames -part_file /usr/share/xray/database/zynq7/xc7z010clg400-1/part.yaml --output_file out.bin

Flashing the FPGA

Finally, we can flash the bitstream on the card with openFPGALoader.

Podman requires a device argument to allow openFPGALoader to access the usb interface. You can find this path with lsusb :

Bus 003 Device 005: ID 0403:6010 Future Technology Devices International, Ltd FT2232C/D/H Dual UART/FIFO IC

Here the usb device path is /dev/bus/usb/003/005

podman run --device=/dev/bus/usb/003/005 --mount=type=bind,source=.,target=/root/code fmn_alpine openFPGALoader -b zybo_z7_10 out.bin