C-20.ADC และ Slider

การจำลองการทำงานของ ADC

-ADC

-Slider

ไฟล์โปรเจค

; ************************************************************

; PROJECT:

; AUTHOR:

; ************************************************************

; Micro + software running

; ------------------------------------------------------------

.MICRO "ATmega168"

.TOOLCHAIN "GCC"

.GCCPATH "C:\WinAVR-20100110"

.GCCMAKE AUTO

.TARGET "adc-1.hex"

.SOURCE "adc-1.c"

.TRACE ; Activate micro trace

; Following lines are optional; if not included

; exactly these values are taken by default

; ------------------------------------------------------------

.POWER VDD=5 VSS=0 ; Power nodes

.CLOCK 1meg ; Micro clock

.STORE 250m ; Trace (micro+signals) storage time

; Micro nodes: RESET, AREF, PB0-PB7, PC0-PC6, PD0-PD7, ACO, TIM1OVF, ADC6, ADC7

; Define here the hardware around the micro

; ------------------------------------------------------------

R1 VDD AREF 1 ;Set reference voltage

Rin0 PC0 node_v0 100K ; conect Slider-1 to PC0 (Analog ch0)

Vin0 node_v0 VSS SLIDER_1(0 5) ; Slider 1 in Control Panel from 0 to 5V

.plot v(pc0) v(node_v0)

ไฟล์ adc-1.c

#include <avr\io.h> // Most basic include files

#include <avr\interrupt.h> // Add the necessary ones

#include <avr\signal.h> // here

#include <util/delay.h>

unsigned int adc0;

// It is recommended to use this coding style to

// follow better the mixed C-assembly code in the

// Program Memory window

//

// ***********************************************************

// Main program

//

int main(void)

{

ADCSRA = (1<<ADEN)|(0<<ADATE); // ADC Enable & Auto Trigger Disable

ADCSRA |= (0<<ADPS2)|(0<<ADPS1)|(1<<ADPS0); // XTAL/8

while(1)

{ // Infinite loop; define here the

ADMUX = 0b0000000; //Aref,left adjust, select ADC0 (bit 2=0 bit 1 = 0 bit 0 = 0)

ADCSRA |= (1<<ADSC); // ADC Start Conversion

while (!(ADCSRA &(1<<ADIF))); // Wait Coversion completes

adc0 = ADCW; // Read ADC

_delay_ms(10);

}

}