Difference between revisions of "Reading Temperature with AVR ADC"
| Line 10: | Line 10: | ||
|- | |- | ||
|1||0||0||0||0||0||0||1 | |1||0||0||0||0||0||0||1 | ||
| + | |} | ||
| + | |||
| + | '''ADC Multiplexer Select (ADMUX)''' <br/> | ||
| + | |||
| + | {| class = "table table-responsive table-striped " | ||
| + | |- | ||
| + | |7||6||5||4||3||2||1||0 | ||
| + | |- | ||
| + | |REFS1||REFS0||ADLAR||MUX4||MUX3||MUX2||MUX1||MUX0 | ||
| + | |- | ||
| + | |0||0||0||0||0||0||0||0 | ||
|} | |} | ||
=Hook up= | =Hook up= | ||
Revision as of 17:56, 25 March 2016
The Atmega32 comes with a 10-bit, 8 channel inbuilt Ananlog to Digital Convertor (ADC). We will set it up and read temperature from LM35 and light with a simple (light dependent Resistor)LDR. So let's get started!
Basics
ADC Control and Status Register A (ACSRA):
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| ADEN | ADSC | ADATE | ADIF | ADIE | ADPS2 | ADPS1 | ADPS0 |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
ADC Multiplexer Select (ADMUX)
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| REFS1 | REFS0 | ADLAR | MUX4 | MUX3 | MUX2 | MUX1 | MUX0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |