The TinyFPGA Programmer is a very simple USB-JTAG bridge designed to program bitstreams onto the JTAG pins of the TinyFPGA A1 and A2 boards.
It uses a PIC16F1455 USB microcontroller allowing the programmer hardware to be cheap.
Using the TinyFPGA Programmer Application you can program .jed files generated by Lattice Diamond.
The programmer firmware appears as a generic USB serial port when you connect it to a computer. GPIO pins on the programmer are controlled through this simple serial interface, encoded as 8-bit bytes with a command type field and data payload. The payload is typically a 6-bit bitmap representing the GPIO pins of the programmer.
| 7:6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Command Type | TMS | TCK | TDI | TDO | RC1 | RC0 |
| Opcode | Command |
| 0 | Configure Input (1)/Output (0) |
| 1 | Extended Command (Unused) |
| 2 | Set Outputs to the given values |
| 3 | Set Outputs and Sample Inputs (byte) |
| SKU | 18285 |
|---|---|
| Manufacturer | TinyFPGA |
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