MoTeC Global Forum

Hello,

I am trying to implement an odometer to measure the total distance travelled that can be reset with a switch. Has anyone done something similar or would have some ideas of how to do this?

Thank you in advance

I would look at the code for total engine run time for how to do a preserved channel. But calculate distance from integrating vehicle speed over time.

You do realize that MoTeC dash products already have this feature.

Wonderful I’ll have a look at that, thank you!

Unfortunately we only use/have a D153 dash which I believe doesn’t have the ability to do this(correct me if I am wrong).
We are also looking at using this for an EV platform which is controlled mainly by the ECU, hence the reason to use the ECU for accomplishing this.

Just remember that you need a scheduled function that calls System.Preserve() periodically to write the value to Flash, and set the channel type to "Flash Backed" rather than volatile. If you're not using a GP package as a baseline then you'll need to add System.Preserve() into your package somewhere - most likely in your odometer function. Ideally you don't want to be writing it multiple times a second for the sake of the flash memory, so best to use a condition in the function so it will only be written to flash once every 10-30s.