Hi Rob, Thanks for the reply.
The ISR in the example is never called...and would not take that form if I ever get it working

I would do some clever bit manipulation and let the main() do the donkey work, especially as the AS1130 can run pretty much independently once it's got it's data.
The problem I am having is that the IRQ line on pin 11 should be pulled to VCC by a 4k7 resistor (datasheet fig 1) but is always around 0.05V whatever I do with the Interrupt bits.
I have 2 of these chips in working condition and both show the same characteristic - hence it must be me that's not doing something I should be (or doing something I shoudn't

)
If you've got one of these working I would appreciate your measurements etc. or any other input you have of course...
Cheers, Roy
PS Love your Nomad Vehicle.
