We built a RISC-V computer running the X Window System (X11) and using the SaxonSoc on an Arty A7-35T FPGA board from Digilent.
We used a USB keyboard and a USB mouse, as shown in the xterm at the top left of the featured image.
This computer is based on github.com/SpinalHDL/SaxonSoc and github.com/SpinalHDL/buildroot-spinal-saxon.
The SaxonSoc is an SoC being developed by Charles Papon, the developer of the VexRiscv, and contributors.
Of course, the Soft CPU used in the SaxonSoc is the VexRiscv, a 32-bit RISC-V.
dev-0.3 branch currently under development, the supported FPGA boards are Radiona ULX3S, Digilent’s Arty A7 and Nexys A7.
We built a RISC-V computer with the following configuration.
- RISC-V single board computer
- Digilent Arty A7-35T
- Alternative to Pmod usb_host_x4
- USB connector to DIP adapter x 2
- Breadboard, jumper wires
- Digilent Pmod VGA
- Digilent Pmod MicroSD
- USB keyboard & mouse
- VGA display
- USB cable (power supply & USB-UART)
The main specifications of the RISC-V computer based on the Arty A7-35T are as follows.
- CPU: Dual-core 32-bit RISC-V
- ISA: RV32IMAFDC & AES custom extension
- Operating frequency: 100 MHz
- DRAM: 256 MB
- Ethernet: 100 Mbps
- USB: 2 ports
- Display resolution: 1024 x 768
- Onboard Flash: for OpenSBI & U-Boot
- MicroSD: for Linux & rootfs
We built a RISC-V computer running the X Window System (X11) on an Arty A7-35T with the SaxonSoc.
The feature of this computer is that we can use a USB keyboard and a USB mouse.
Also, We think it’s good to be able to use the Window Maker as a window manager.