There is an opensource alternative available for the B-Series boards called [Project IceStorm](http://www.clifford.at/icestorm/) however this has not yet been tested with the TinyFPGA boards.

To jumpstart development a simple [iCEcube2 project template](https://github.com/tinyfpga/TinyFPGA-B-Series/tree/master/template) is provided with a top-level verilog file that represents the pins on the B-Series boards. This project contains a timing constraint for the 16MHz clock and pin constraints for each of the pins. You can download the template as part of the [TinyFPGA B-Series Repository ZIP](https://github.com/tinyfpga/TinyFPGA-B-Series/archive/master.zip).

The A-Series boards are programmed via JTAG. You will need [JTAG Programmer Hardware](https://www.ebay.com/sch/i.html?_productid=533163279) and the [Lattice Programmer Software](http://www.latticesemi.com/programmer). In the future there may be a dedicated programmer device for the A-Series boards.

The B-Series boards have a built-in USB bootloader. To program a bitstream use the [TinyFPGA B-Series Programmer](TinyFPGA_Programmer_1.0.exe) and select the serial port of the device and bitstream file. If you are using Linux or OSX you can run the programmer application as a Python script. It is available in the [TinyFPGA B-Series GitHub Repo](https://github.com/tinyfpga/TinyFPGA-B-Series/tree/master/programmer). You can download the programmer python scripts as part of the [TinyFPGA B-Series Repository ZIP](https://github.com/tinyfpga/TinyFPGA-B-Series/archive/master.zip).