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Julien THILLARD
2025-10-07 18:12:50 +02:00
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example/README.md
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# Example
This directory shows how to flash a system verilog program (A full-adder) on a Zybo `xc7z010clg400-1` card.
This directory shows how to flash a SystemVerilog program (a full-adder) on a Zybo `xc7z010clg400-1` board.
## Build
Firstly, the system verilog file needs to be converted to verilog in order to use it with yosys :
Firstly, the SystemVerilog file needs to be converted to verilog to use it with Yosys :
```bash
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.
The mount parameter is used to provide the current directory to podman.
Then, yosys can achieve the RTL synthesis of the program :
Then, Yosys can perform the RTL synthesis of the program :
```bash
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 :
Nextpnr can now place and route each component using the XDC constraints file :
```bash
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 :
Now the FASM file can be converted to a frames file and then to a bitstream :
```bash
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
@@ -33,9 +33,9 @@ podman run --mount=type=bind,source=.,target=/root/code fmn_alpine xc7frames2bit
## Flashing the FPGA
Finally, we can flash the bitstream on the card with `openFPGALoader`.
Finally, we can flash the bitstream on the board with `openFPGALoader`.
Podman requires a device argument to allow openFPGALoader to access the usb interface. You can find this path with `lsusb` :
Podman requires a device argument to allow `openFPGALoader` to access the USB interface. You can find this path with `lsusb` :
```txt
Bus 003 Device 005: ID 0403:6010 Future Technology Devices International, Ltd FT2232C/D/H Dual UART/FIFO IC