Development of ARINC 825 protocol on Pixhawk

1

Hello I am supposed to build a triplex redundant model using 3 Pixhawks communicating with each other over the CAN BUS they are supposed to use the ARINC 825 protocol for a first task I must receive a message over the CAN BUS which make the led on the Pixhawk Blink so any suggestions where can I start ?

Thanks in advance.

2

What flight stack is the target: ArduPilot or PX4?
Makes a huge difference to how this would need to be approached.

3

I am targeting the PX4… But why would it matter ?

4

Different way that canbus is implemented.
ArduPilot has a can layer, with hooks to implement whatever protocol you want underneath: their implementation was designed to support multiple protocols (and does).
With PX4 it’s just uavcan. You’ll have to either replace uavcan with arinc 825, or design a way to enable px4 to support more than one can protocol, which would be quite a bit more work. If you need arinc 825, replacing uavcan would be easier.

5

Ok if i need to replace the UAVCAN on the PX4 With the ARINC825 is there is a good way to say maybe a way to replace the code used for decoding the serial message and replace it with my own code

Thanks in advance

6

All the dsdl source is auto generated based on the definition files.
You can look at how it’s implemented here: https://github.com/PX4/Firmware/tree/master/src/drivers/uavcan

7

ok I will take a look at it thank you :smile: