#include <mega328p.h> #include <stdio.h> #include <delay.h> // Alphanumeric LCD functions #include <alcd.h> // Declare your global variables here char lcd[5]; char lcd2[5]; unsigned int Result; unsigned int Result2; float x; float b; // Timer1 overflow interrupt service routine // Voltage Reference: AREF pin #define ADC_VREF_TYPE ((0<<REFS1) | (0<<REFS0) | (0<<ADLAR)) // Read the AD conversion result unsigned int read_adc(unsigned char adc_input) { ADMUX=adc_input | ADC_VREF_TYPE; // Delay needed for the stabilization of the ADC input voltage delay_us(10); // Start the AD conversion ADCSRA|=(1<<ADSC); // Wait for the AD conversion to complete while ((ADCSRA & (1<<ADIF))==0); ADCSRA|=(1<<ADIF); return ADCW; } interrupt [TIM1_OVF] void timer1_ovf_isr(void) { TCNT1H=0xBDC >> 8; TCNT1L=0xBDC & 0xff; lcd_gotoxy(0,1); lcd_puts("Pot2="); lcd_gotoxy(5,1); Result2=read_adc(1); x=Result2*5.0/1023; sprintf(lcd2,"%.2f",x); lcd_puts(lcd2); lcd_gotoxy(10,1); lcd_puts("Volt"); // Place your code here // Reinitialize Timer1 value } void main(void) { // Declare your local variables here // Crystal Oscillator division factor: 1 #pragma optsize- CLKPR=(1<<CLKPCE); CLKPR=(0<<CLKPCE) | (0<<CLKPS3) | (0<<CLKPS2) | (0<<CLKPS1) | (0<<CLKPS0); #ifdef _OPTIMIZE_SIZE_ #pragma optsize+ #endif // Input/Output Ports initialization // Port B initialization // Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In DDRB=(0<<DDB7) | (0<<DDB6) | (0<<DDB5) | (0<<DDB4) | (0<<DDB3) | (0<<DDB2) | (0<<DDB1) | (0<<DDB0); // State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T PORTB=(0<<PORTB7) | (0<<PORTB6) | (0<<PORTB5) | (0<<PORTB4) | (0<<PORTB3) | (0<<PORTB2) | (0<<PORTB1) | (0<<PORTB0); // Port C initialization // Function: Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In DDRC=(0<<DDC6) | (0<<DDC5) | (0<<DDC4) | (0<<DDC3) | (0<<DDC2) | (0<<DDC1) | (0<<DDC0); // State: Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T PORTC=(0<<PORTC6) | (0<<PORTC5) | (0<<PORTC4) | (0<<PORTC3) | (0<<PORTC2) | (0<<PORTC1) | (0<<PORTC0); // Port D initialization // Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In DDRD=(0<<DDD7) | (0<<DDD6) | (0<<DDD5) | (0<<DDD4) | (0<<DDD3) | (0<<DDD2) | (0<<DDD1) | (0<<DDD0); // State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=P Bit1=T Bit0=T PORTD=(0<<PORTD7) | (0<<PORTD6) | (0<<PORTD5) | (0<<PORTD4) | (0<<PORTD3) | (1<<PORTD2) | (0<<PORTD1) | (0<<PORTD0); // Timer/Counter 0 initialization // Clock source: System Clock // Clock value: Timer 0 Stopped // Mode: Normal top=0xFF // OC0A output: Disconnected // OC0B output: Disconnected TCCR0A=(0<<COM0A1) | (0<<COM0A0) | (0<<COM0B1) | (0<<COM0B0) | (0<<WGM01) | (0<<WGM00); TCCR0B=(0<<WGM02) | (0<<CS02) | (0<<CS01) | (0<<CS00); TCNT0=0x00; OCR0A=0x00; OCR0B=0x00; // Timer/Counter 1 initialization // Clock source: System Clock // Clock value: 62.500 kHz // Mode: Normal top=0xFFFF // OC1A output: Disconnected // OC1B output: Disconnected // Noise Canceler: Off // Input Capture on Falling Edge // Timer Period: 1 s // Timer1 Overflow Interrupt: On // Input Capture Interrupt: Off // Compare A Match Interrupt: Off // Compare B Match Interrupt: Off TCCR1A=(0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (0<<COM1B0) | (0<<WGM11) | (0<<WGM10); TCCR1B=(0<<ICNC1) | (0<<ICES1) | (0<<WGM13) | (0<<WGM12) | (1<<CS12) | (0<<CS11) | (0<<CS10); TCNT1H=0x0B; TCNT1L=0xDC; ICR1H=0x00; ICR1L=0x00; OCR1AH=0x00; OCR1AL=0x00; OCR1BH=0x00; OCR1BL=0x00; // Timer/Counter 2 initialization // Clock source: System Clock // Clock value: Timer2 Stopped // Mode: Normal top=0xFF // OC2A output: Disconnected // OC2B output: Disconnected ASSR=(0<<EXCLK) | (0<<AS2); TCCR2A=(0<<COM2A1) | (0<<COM2A0) | (0<<COM2B1) | (0<<COM2B0) | (0<<WGM21) | (0<<WGM20); TCCR2B=(0<<WGM22) | (0<<CS22) | (0<<CS21) | (0<<CS20); TCNT2=0x00; OCR2A=0x00; OCR2B=0x00; // Timer/Counter 0 Interrupt(s) initialization TIMSK0=(0<<OCIE0B) | (0<<OCIE0A) | (0<<TOIE0); // Timer/Counter 1 Interrupt(s) initialization TIMSK1=(0<<ICIE1) | (0<<OCIE1B) | (0<<OCIE1A) | (1<<TOIE1); // Timer/Counter 2 Interrupt(s) initialization TIMSK2=(0<<OCIE2B) | (0<<OCIE2A) | (0<<TOIE2); // External Interrupt(s) initialization // INT0: Off // INT1: Off // Interrupt on any change on pins PCINT0-7: Off // Interrupt on any change on pins PCINT8-14: Off // Interrupt on any change on pins PCINT16-23: Off EICRA=(0<<ISC11) | (0<<ISC10) | (0<<ISC01) | (0<<ISC00); EIMSK=(0<<INT1) | (0<<INT0); PCICR=(0<<PCIE2) | (0<<PCIE1) | (0<<PCIE0); // USART initialization // USART disabled UCSR0B=(0<<RXCIE0) | (0<<TXCIE0) | (0<<UDRIE0) | (0<<RXEN0) | (0<<TXEN0) | (0<<UCSZ02) | (0<<RXB80) | (0<<TXB80); // Analog Comparator initialization // Analog Comparator: Off // The Analog Comparator's positive input is // connected to the AIN0 pin // The Analog Comparator's negative input is // connected to the AIN1 pin ACSR=(1<<ACD) | (0<<ACBG) | (0<<ACO) | (0<<ACI) | (0<<ACIE) | (0<<ACIC) | (0<<ACIS1) | (0<<ACIS0); // Digital input buffer on AIN0: On // Digital input buffer on AIN1: On DIDR1=(0<<AIN0D) | (0<<AIN1D); // ADC initialization // ADC Clock frequency: 125.000 kHz // ADC Voltage Reference: AREF pin // ADC Auto Trigger Source: Free Running // Digital input buffers on ADC0: On, ADC1: On, ADC2: On, ADC3: On // ADC4: On, ADC5: On DIDR0=(0<<ADC5D) | (0<<ADC4D) | (0<<ADC3D) | (0<<ADC2D) | (0<<ADC1D) | (0<<ADC0D); ADMUX=ADC_VREF_TYPE; ADCSRA=(1<<ADEN) | (0<<ADSC) | (1<<ADATE) | (0<<ADIF) | (0<<ADIE) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0); ADCSRB=(0<<ADTS2) | (0<<ADTS1) | (0<<ADTS0); // SPI initialization // SPI disabled SPCR=(0<<SPIE) | (0<<SPE) | (0<<DORD) | (0<<MSTR) | (0<<CPOL) | (0<<CPHA) | (0<<SPR1) | (0<<SPR0); // TWI initialization // TWI disabled TWCR=(0<<TWEA) | (0<<TWSTA) | (0<<TWSTO) | (0<<TWEN) | (0<<TWIE); // Alphanumeric LCD initialization // Connections are specified in the // Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu: // RS - PORTD Bit 0 // RD - PORTD Bit 1 // EN - PORTD Bit 3 // D4 - PORTD Bit 4 // D5 - PORTD Bit 5 // D6 - PORTD Bit 6 // D7 - PORTD Bit 7 // Characters/line: 16 // Global enable interrupts #asm("sei") lcd_init(16); while (1) { while( (PIND & ( 1 << PIND2)) == 0){ lcd_gotoxy(0,0); lcd_puts("Pot1="); lcd_gotoxy(5,0); Result=read_adc(0); b=Result*5.0/1023; sprintf(lcd,"%.2f",b); lcd_puts(lcd); lcd_gotoxy(10,0); lcd_puts("Volt"); delay_ms(250); } } }
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