This directory contains the FX2 firmware for the HDMI2USB project. It uses the Open Source fx2lib, a free reimplementation of the Cypress support library.
The firmware is responsible for transporting the video data off of the FPGA. It does this by enumerating as a USB Video Class device; a standard way of interfacing devices such as webcams to a host. Linux, Windows and OS X all include support out of the box for reading taking to such devices.
The firmware is also used for control and debugging of the system, through a USB Communications Class Device. This is a common way of attaching serial ports to the system, and under Linux it can be accessed at /dev/ttyUSBX.
The firmware uses the Open Source fx2lib, which will be downloaded as part of the build process.
The build process requires git, make and SDCC. SDCC, the Small Device C Compiler, is packaged in Debian and derivatives such as Ubuntu, as well as Fedora:
sudo apt-get install sdcc
sudo yum install sdcc
make
Firmware is generally compiled with SDDC 3.6 and the sdas8051 assembler. Older versions might work but have been known to generate incorrect firmware.
+----------------+------+------+------+ | Board | VID | PID | DID | +----------------+------+------+------+ | Digilent Atlys | 1D50 | 60B7 | 0002 | | Numato Opsis | 2A19 | 5442 | 0002 | +----------------+------+------+------+
sudo /sbin/fxload -D /dev/bus/usb/$dev -t fx2lp -I $1`This firmware is designed to be compatible with loading using microload. This means that it can't put loaded segments at locations XXXX.
FIXME: Check this is correct!!!
| Endpoint | Direction | Transfer type | Used? | Comments |
|---|---|---|---|---|
| 0 | - | CONTROL | No | USB Reserved |
| 1 | IN | INT | Yes | CDC Polling/Int? |
| 2 | OUT | BULK | Yes | Used for UART TX |
| 4 | IN | BULK | Yes | Used for UART RX |
| 6 | IN | BULK | Yes | Used for sending UVC camera data |
| 8 | - | - | No | Unused, can be freed |
| Endpoint | Direction | Transfer type | Comments |
|---|---|---|---|
| 0 | - | Control | Reserved |
| 1 | IN and OUT | INT/BULK | 64-byte buffers for smaller payloads |
| 2 | IN or OUT | BULK/ISO/INT | 512 or 1024 byte buffers for larger payloads |
| 4 | IN or OUT | BULK/ISO/INT | |
| 6 | IN or OUT | BULK/ISO/INT | |
| 8 | IN or OUT | BULK/ISO/INT |
Create a USB Virtual COM Port: http://janaxelson.com/usb_virtual_com_port.htm
USBCDC1.2 Spec PSTN120.pdf Page