Difference between revisions of "RISC-V & FreeRTOS"

Revision as of 14:10, 6 May 2019

Installing VectorBlox ORCA Core and RISC-V Tools

• Download the source from https://github.com/VectorBlox/orca using git.

  In this guide the install locations /opt/orca/ and /opt/riscv/ were chosen.

• Open a terminal window and run:

  $ git clone https://github.com/VectorBlox/orca.git /opt/orca

  $ cd /opt/orca/tools/riscv-toolchain/

  $ export RISCV_INSTALL="/opt/riscv"

  $ ./build-toolchain.sh

  Info: This may take a while.

• Finally add the RISC-V tools to your path:

  $ nano ~/.profile

export PATH=/opt/riscv/bin:$PATH

Compiling Firmware

• Download the RISC-V & FreeRTOS Example and unpack.
• Open a terminal window, change directory to either riscv_freertos_example/riscv or riscv_freertos_example/riscv_freertos and run:

  $ make

• The folder out now contains the bootrom.mif (Memory Initalization File).
• Copy the bootrom.mif to riscv_freertos_example/quartus

Quartus Prime Project

• Open Quartus Prime and load the project under riscv_freertos_example/quartus.

  INFO: This Quartus project is specific to the SpiderSoM - for the MX10 the pin assignment has to be changed.

• Open Assignments -> Settings -> IP Settings -> IP Catalog Search Locations and add the search path to ORCA.

  If ORCA was installed under /opt/orca/ then use as search path: /opt/orca/**/*

• (Optional) Open the Platform Designer with the Qsys file
  • (Optional) Under System Contents, double-click onchip_memory2_0 and under memory initialization provide your bootrom.mif file. (The default is to use the bootrom.mif in the quartus folder)
  • (Optional) Save and Generate the Qsys system.
• Compile the project and program it onto the FPGA using either OpenOCD or USB-Blaster.

After programming:

• If the red LED on the module starts blinking once per second, the FPGA was programmed successfully.
• If the green LED on the module starts blinking once every two seconds, the RISC-V Core and its firmware is working.
• PMod J2 will output a binary counter.
• You can use the UART of the FPGA by using standard tools such as picocom:

  $ sudo picocom -b 115200 /dev/ttyACM0

  • Every character written is looped back and should be displayed on the terminal.

Downloads

• VectorBlox ORCA
• RISC-V & FreeRTOS Example