Communication between the fixture and the Vision Controller is done through the SPI interface. Therefore the fixtures Main Controller acts as Master and the Vision Controller as Slave.

The interface consists of five 3.3V digital signals:

• IRQ – Interrupt signal. Active low, configurable through the interrupt mask register
• CS – SPI Chip select, active low
• SCK – SPI clock input
• MOSI – SPI data input
• MISO – SPI data output

For SPI interface exists a C library which can be used. You can find it in the chapter Vision SPI Library. The chapter also describes how to implement it. Otherwise use the detailed SPI Specification and build your own SPI Interface.