FPGACode-ide -> IceSugar-riscv -> IceSugar-tv80 -> IceSugar-6502

This repository contains a simple project for Icebreaker fpga built on Makefile and open Toolchain, which allows us to use code as a full -fledged development environment.

As an editor of the code can be absolutely anything from vim to vscode, there is no binding to the editor. I am using uncoded. It is *code* that editor makes it possible to conveniently visualize the development process, due to extensions.

For example, consider installation on Ubuntu

sudo apt install openjdk-8-jdk openjdk-8-jre #It is necessary for impulse and verilog-format
sudo apt install curl jq #It is necessary for installation toolchain
sudo apt install code #Any variety of VSCODE

The first thing to do is to install toolchain. Installation to the Directory /opt/fpga. The directory can be configured in Makefile. The list of established components is configured in ./toolchain.txt

make toolchain

Next, you can establish the necessary expansion.

Basic extensions:

Additional extensions:

Analogue extensions:

The commands can be executed manually in the terminal as well as through the Task menu in Code

make all        #Project assembly
make synthesis  #Synthesis RTL
make sim        #Perform Testbench
make flash      #Flash ROM
make prog       #Flash SRAM
make clean      #Cleaning the assembly of the project
make formatter  #Perform code formatting
make toolchain  #Install assembly tools

• .vscode - Directory сonfiguration for vscode
  • settings.json - Contains Linter settings
  • tasks.json - Contains instructions for launching Makefile
• build - Directory of assembly artifacts
  • *.vcd - The file contains temporary diagrams (result of modeling)
  • *.bin - The final firmware file
• src - Directory of source files
  • *.v - Source code
  • *_tb.v - Test Bench
  • top.v - Initial file
• toolchain - Directory of scripts for the assembly of Toolchain
• .verilog-format - Code style configuration file
• *.pcf - Pin planner
• Makefile - Assembly system
• toolchain.txt - List of tools used

There was no simple way to reassign the keys for the working area. For this reason, a change in the global configuration will be required. This can be done by adding to the file keybindings.json

{
    "key": "alt+shift+a",
    "command": "workbench.action.tasks.runTask",
    "args": "PRJ: make"
},

First you need to find out the VendorID and ProductID of our adapter. This can be done with the following command:

lsusb | grep UART

Example:

 Bus 003 Device 011: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC

Remember the values after the ID abbreviation, they will be useful to us later.

Create a file in /etc/udev/rules.d/

sudo nano /etc/udev/rules.d/10-ft232.rules

As a name, it is convenient to indicate the name of the chip installed in the adapter. In my case it is FT232.

Now we add content in the window that opens (we change idVendor and idProduct, we got these values in the previous paragraph):

SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", \
    MODE:="0666", GROUP:="users",\
    SYMLINK+="ft232_%n"

With this entry, we set write and read rights to the USB device 0403:6001 for ordinary users. We also tell udev to create a symbolic link to it called ft232_xxx.

Restart udev.

sudo udevadm control --reload-rules

We check the rights to our device.

$ ls -l /dev/ | grep USB
lrwxrwxrwx. 1 root root             7 янв 25 15:09 ft232_0 -> ttyUSB0
crw-rw-rw-. 1 root users     188,   0 янв 25 15:09 ttyUSB0

TODO:

• Make IceSugar-6502
• Improve the testbench system