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uc: Remove AC disabling in ANALOG_COMP ISR. Disable digital input circuitry on AINx and ADCx pins.

This commit is contained in:
Bart Van Der Meerssche 2009-10-20 12:29:32 +00:00
parent 248620b218
commit f7697b700e
1 changed files with 7 additions and 5 deletions
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12
uc/main.c
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@ -110,8 +110,6 @@ ISR(ANALOG_COMP_vect) {
UCSR0B &= ~((1<<RXEN0) | (1<<TXEN0));
//disable ADC:
ADCSRA &= ~(1<<ADEN);
// disable AC:
ACSR |= (1<<ACD);
for (i=0; i<4; i++)
eeprom_write_block((const void*)&measurements[i].value, (void*)&EEPROM_measurements[i].value, 4);
@ -123,8 +121,6 @@ ISR(ANALOG_COMP_vect) {
UCSR0B |= (1<<RXEN0) | (1<<TXEN0);
// enable ADC and start a first ADC conversion
ADCSRA |= (1<<ADEN) | (1<<ADSC);
// enable AC
ACSR &= ~(1<<ACD);
printString("msg metervalues written to EEPROM (BROWN-OUT)\n");
}
@ -202,7 +198,10 @@ void setup()
// analog comparator setup for brown-out detection
// PD7=AIN1 configured by default as input to obtain high impedance
// disable digital input cicuitry on AIN0 and AIN1 pins to reduce leakage current
DIDR1 |= (1<<AIN1D) | (1<<AIN0D);
// comparing AIN1 (Vcc/4.4) to bandgap reference (1.1V)
// bandgap select | AC interrupt enable | AC interrupt on rising edge (DS p.243)
ACSR |= (1<<ACBG) | (1<<ACIE) | (1<<ACIS1) | (1<<ACIS0);
@ -212,6 +211,9 @@ void setup()
TCCR2B |= (1<<CS21) | (1<<CS20);
TIMSK2 |= (1<<TOIE2);
// disable digital input cicuitry on ADCx pins to reduce leakage current
DIDR0 |= (1<<ADC5D) | (1<<ADC4D) | (1<<ADC3D) | (1<<ADC2D) | (1<<ADC1D) | (1<<ADC0D);
// select VBG as reference for ADC
ADMUX |= (1<<REFS1) | (1<<REFS0);
// ADC0 selected by default