So, I have my pressure transducer connected to the ADC0 port on an ATmega32 chip. I can get the ADCH value and convert it to a string using itoa(...) and it displays fine to my LCD. However, when I try to use the ADCH output and multiply it against some constants (doubles already defined) then convert it to a string using dtostrf(...), it either displays 00's, or a bunch of gibberish.
I guess my question is this:
if I wanted to use the ADCH output and multiply it by 1.1 and display that value on the LCD, what the hell do I need to do? I know exactly how to display a string to my LCD, so it has to be an intermediate step that is causing me problems. Any ideas AVR gurus?