avr: set up the ADC with bandgap as a reference
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@ -223,6 +223,18 @@ void setup_pulse_input(void)
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EIMSK = (1<<INT0) | (1<<INT1);
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EIMSK = (1<<INT0) | (1<<INT1);
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}
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}
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void setup_adc(void)
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{
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// disable digital input cicuitry on ADCx pins to reduce leakage current
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DIDR0 |= (1<<ADC5D) | (1<<ADC4D) | (1<<ADC3D) | (1<<ADC2D) | (1<<ADC1D) | (1<<ADC0D);
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// select VBG as reference for ADC
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ADMUX |= (1<<REFS1) | (1<<REFS0);
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// ADC prescaler set to 32 => 3686.4kHz / 32 = 115.2kHz (DS p.258)
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ADCSRA |= (1<<ADPS2) | (1<<ADPS0);
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// enable ADC and start a first ADC conversion
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ADCSRA |= (1<<ADEN) | (1<<ADSC);
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}
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void setup_timer1(void)
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void setup_timer1(void)
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{
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{
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@ -298,10 +310,11 @@ int main(void)
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//PORTD |= (1<<PD5);
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//PORTD |= (1<<PD5);
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setup_datastructs();
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setup_datastructs();
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setup_adc();
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setup_timer1();
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setup_timer1();
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setup_pulse_input();
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setup_pulse_input();
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setup_analog_comparator();
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setup_analog_comparator();
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// initialize the CTRL buffers
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// initialize the CTRL buffers
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ctrlInit();
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ctrlInit();
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// initialize the UART hardware and buffers
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// initialize the UART hardware and buffers
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@ -115,6 +115,9 @@ CSTANDARD = -std=gnu99
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# Place -D or -U options here
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# Place -D or -U options here
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CDEFS = -DF_CPU=$(F_CPU)UL
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CDEFS = -DF_CPU=$(F_CPU)UL
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# Enable debugging mode
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#CDEFS += -DDBG=1
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# uncomment and adapt these line if you want different UART library buffer size
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# uncomment and adapt these line if you want different UART library buffer size
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CDEFS += -DUART_RX_BUFFER_SIZE=64
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CDEFS += -DUART_RX_BUFFER_SIZE=64
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CDEFS += -DUART_TX_BUFFER_SIZE=64
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CDEFS += -DUART_TX_BUFFER_SIZE=64
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