Greetings all,
I'm just starting to fiddle with 1-wire sensors, and I'm planning on using a Rabbit Semiconductor processor to run it all. I'll be writing some of the software, and I prefer to know how to go about interrogating the various devices. Even if I can count on just using pre-canned software, I'd like to know how to do the basic tasks.
I've started working with a DS18S20 temperature sensor, and it seems straight-forward. But I have no experience with the more complicated sensors.
So, my question: how do you read the barometer?
Do you get a raw A/D conversion output from the DS2438 and scale it to the specified pressure limits? If that's the case, what's the pressure-voltage transfer function? Do you assume it's linear or do you need to obtain or create a function or a look-up table?
Cheers,
Tim Cole
Ottawa ON
I'm just starting to fiddle with 1-wire sensors, and I'm planning on using a Rabbit Semiconductor processor to run it all. I'll be writing some of the software, and I prefer to know how to go about interrogating the various devices. Even if I can count on just using pre-canned software, I'd like to know how to do the basic tasks.
I've started working with a DS18S20 temperature sensor, and it seems straight-forward. But I have no experience with the more complicated sensors.
So, my question: how do you read the barometer?
Do you get a raw A/D conversion output from the DS2438 and scale it to the specified pressure limits? If that's the case, what's the pressure-voltage transfer function? Do you assume it's linear or do you need to obtain or create a function or a look-up table?
Cheers,
Tim Cole
Ottawa ON