Lgt8fx - ADC analogRead() is wrong - it only returns back 10bit - need to load manually ADCH + ADCL to get 12bit value

[jlsilicon]

I used analogRead() for Lgt8fx , but it only gave me values from 0 to 1023 (10bits). -- which is wrong for Lgt8f chips. I needed to manually read ADCH + ADCL to get the values from 0 to 4095 (12bits)

See below :

// - wait for ADC Ready 
// - tests wrong - only 10 bits , input of potentiometer varies between 0 .. 1023
A_R = analogRead( A0 );  

// - get true 12bit value - tests correctly - returns 12 bits , input of potentiometer varies between 0 .. 4095
A_R = ( (ADCH << 8) | (ADCL << 0) );  

[jayzakk]

10 bits is the Arduino default for compatibility reasons. If you need better (and know your board supports it) you can change with analogReadResolution().

This works as intended, so closing.

Regards, Oliver

[jlsilicon]

oh well