miniSpartan6-plus_usb_communication

A project to communicate a FPGA board (miniSpartan6+) and a PC via USB in 12Mbit/s. One byte takes 12 bits (2 start bits, 8 data bit and 2 stop bits), so It may goes 1.0MByte/s.

Programs

ISE

This FPGA program waits signal from serial port. If it received some data, it returns same data.

# After you create bit file by ISE
cd ./ise/work
sudo xc3sprog -c ftdi mojo_top.bit

Original: https://github.com/roman3017/miniSpartan6-plus/tree/master/projects/mojo-uart

Python

You can communicate with Spartan6 by the following command.

python ./python/serial_communication.py

CPP

You can communicate with Spartan6 with using libftdi or ioctl.

libftdi

libftdi ver1 or more is needed. Ubuntu apg-get supports ver 0.2 so installing latest libftdi from source is needed.

https://www.intra2net.com/en/developer/libftdi/download.php

cd ./cpp
make
sudo ./bin/serial_with_libftdi

ioctl

cd ./cpp
make
sudo ./bin/serial_with_ioctl

libusb

I also wrote program with using libusb but it does not run correctry only that. Libusb can't set baudrate so this program needs to run another program to set baudrate.

cd ./cpp
make
sudo ./bin/serial_with_ioctl # run to set baudrate
sudo ./bin/serial_with_libusb

License

MIT

References

• ubuntuでlibftdiを使って12Mbit/sのシリアル通信をする方法
• Connecting USB FT2232 to an Microblaze UART
• How to reach (close to?) 480Mbps over USB?