atmega 16 adc problem

[vishu489]

can anyone tell me how to reduce 10 bit resolution of atmega 16 adc to 8 bit resolution

 

[freddyp007]

That's pretty simple. Look for ADLAR bit in the ADMUX register. When it is written a '0', 10-bit resolution is selected and the lower 8-bits are stored in the ADCL register and the remaining two bits are stored in the ADCH reg. When you write a '1' to the ADLAR bit, 8-bit resolution is selected. You can read the ADCH reg. alone to get the 8-bit value.

 

[alexan_e]

Or you can always get the 8bits using (10bit_value & 0xFF) assuming that it is a right justified value

Alex

 

[vishu489]

thank you a lot