Ibex RISC-V Core SoC Example

Please see examples for a description of this example.

Requirements

Tools

• RV32 compiler
• srecord
• fusesoc and its dependencies
• Xilinx Vivado

Build

Software

First the software must be built. Go into examples/sw/led and call:

make CC=/path/to/RISC-V-compiler

The path to the RV32 compiler /path/to/RISC-V-compiler depends on the environment. For example, it can be riscv32-unknown-elf-gcc if the binary is available through the PATH environment or /opt/riscv/bin/riscv-none-embed-gcc if a specific path is used.

This should produce a led.vmem file which is used in the synthesises to update the SRAM storage.

Hardware

Run the following command at the top level to build the hardware.

fusesoc --cores-root=. build lowrisc:ibex:top_artya7_100

This will create a directory build which contains the output files, including the bitstream.

Program

After the board is connected to the computer it can be programmed with:

fusesoc --cores-root=. pgm lowrisc:ibex:top_artya7_100

LED1/LED3 and LED0/LED2 should alternately be on after the FPGA programming is finished.