1 Piksi Multi with ARINC 429 interface (architecture) - Art-ut-Kia/A429_Piksi GitHub Wiki

Architecture

Main components included in an A429_piksi:

• The Piksi-Multi is powered by the 28V/5V DC converter installed on the NAVEOL-NAV429 arduino shield. It's RF input (an MMCX socket on the PCB) is routed, via a short (15cm) MMCX-TNC adapter, to the front face of the enclosure. It communicates with the arduino uno via an UART full duplex link without any flow control (RX and TX signals only). Some other signals link the Piksi-Multi and the Arduino-Uno (marked "GPIO" in the diagram). They are described later. Last, the other Piksi's UART is routed to a small connector that can be connected to a PC via an USB<=>UART adapter. With the PC running the "Swift Console" software, such arrangement permits handy troubleshooting.
• The arduino uno is also powered by its shield. Take care with USB interface powering mode: the Piksi-Multi drains about 600mA from a 5V power supply that a usual PC USB port cannot provide. Hence reprogramming the arduino will require first to power the unit from the 28V network and then to connect the USB cable (or to open the unit enclosure and disconnect the Piksi-Multi connector). If this procedure is not followed, programming shall not work and, at worst, something might be damaged.
• The NAVEOL-NAV429 shield exchanges with the Arduino-Uno via a SPI link. It is interconnected with the front panel SUB-D25 connector with a 25-conductor ribbon cable.

Interconnection of components: