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Код: Выделить всё

#define F_CPU 1000000UL

#include <avr/io.h>
#include <util/delay.h>

#define setHIGH(pin) PORTB |= (1 << pin)
#define setLOW(pin) PORTB &= ~(1 << pin)

#define isHIGH(pin) PINB & (1 << pin)
#define isLOW(pin) !(PINB & (1 << pin))

//aliases for pins
#define ledPin   PB0

void initADC(){
    ADMUX =
        (0 << REFS1) |  //set REFS1 to 0 to use VCC as VREF (attiny24/45/85)
        (0 << REFS0) |  //set REFS0 to 0 to use VCC as VREF (attiny13/24/45/85)
        (1 << ADLAR) |  //shift in a 1 and follow 8bit procedure
        (1 << MUX0);    //set MUX0 to 1 to use PB2 as analog input pin (ADC1)

    ADCSRA =
        (1 << ADEN) |   //enable ADC
        (0 << ADSC);    //set ADSC to 0 to sure no conversion are happening
}

void initIO(){
    DDRB =
        (1 << PB0);    //set OUTPUT
}

unsigned int analogRead(){
    unsigned int result = 0;
    ADCSRA |= (1 << ADSC);          //start ADC conversation
    while(ADCSRA & (1 << ADSC));    //wait for conversation complete
    result = ADCW;                  //get the result of conversation
    return result;                  //return the result
}

int main(void){
    initADC();  //setup ADC    
    initIO();   //setup Input/Output system
    while(1){
        if(analogRead() < 1023){
            setHIGH(ledPin);
        }else{
            setLOW(ledPin);
        }
    }
    return 0;
}

Код: Выделить всё

void setup(){
    pinMode(0, OUTPUT);
    pinMode(2, INPUT);
}
void loop(){
    if(analogRead(2) < 1023){
         digitalWrite(0, HIGH);
    }else{
         digitalWrite(0, LOW);
    }
}

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ADCSRA |= 0x07

Код: Выделить всё

while(ADCSRA & (1 << ADSC));    //wait for conversation complete

Код: Выделить всё

while(!(ADCSRA & (1 << ADIF))) ;
ADCSRA |= (1 << ADIF); 

Код: Выделить всё

void initADC(){
    ADMUX =
        (0 << REFS1) |  //set REFS1 to 0 to use VCC as VREF (attiny24/45/85)
        (0 << REFS0) |  //set REFS0 to 0 to use VCC as VREF (attiny13/24/45/85)
        (0 << ADLAR) |  //bit ADLAR remains clear to follow 10bits procedure
        (1 << MUX0);    //set MUX0 to 1 to use PB2 as analog input pin (ADC1)

    ADCSRA =
        (1 << ADEN) |   //enable ADC
        (0 << ADSC) |   //set ADSC to 0 to sure no conversion are happening
        (1 << ADPS1) |  //set ADPS1 and ADPS0 bits, which set a prescaler to 8  
        (1 << ADPS0);   //for 1MHz system clock to set ADC input clock equal 125KHz
}

Код: Выделить всё

void setup() {
  // put your setup code here, to run once:
  pinMode(0, OUTPUT);
  pinMode(4, INPUT);
  digitalWrite(4, HIGH);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(4) == LOW){
    analogWrite(0,50);
  }else{
    analogWrite(0,0);
  }
}

Код: Выделить всё

#define F_CPU 1000000UL

#include <avr/io.h>
#include <util/delay.h>

#define setHIGH(pin) PORTB |= (1 << pin)
#define setLOW(pin) PORTB &= ~(1 << pin)
#define setPWM(pin, dutycycle) pin = dutycycle

#define isHIGH(pin) PINB & (1 << pin)
#define isLOW(pin) !(PINB & (1 << pin))

//aliases for pins
#define ledPin   OCR0A    //PB0 led is using PWM
#define buttonPin    PB4  //PB4 on the button

void initIO(){
    DDRB =
        (1 << PB0) |   //set OUTPUT
    PORTB =
        (1 << PB4);    //switch ON pull-up resistor on PB4
}

void initPWM(){
    TCCR0A =
        (0 << COM0A0) | //bit COM0A0 remains clear and
        (1 << COM0A1) | //set bit COM0A1, which (in Fast PWM mode) clears OC0A on compare-match, and sets OC0A at BOTTOM
        (1 << WGM00) |  //set bits WGM00 and WGM01, which (when combined with WGM02
        (1 << WGM01);   //from TCCR0B below) enables Fast PWM mode
    TCCR0B =
        (0 << WGM02) |  //bit WGM02 remains clear, which (when combined with WGM00 and WGM01 from TCCR0A above) enables Fast PWM mode
        (1 << CS00);    //set bits CS01 (leaving CS01 and CS02 clear), which tells Timer/Counter-0 to not use a prescalar
}

int main(void){
    initIO();   //setup Input/Output system
    initPWM();  //setup PWM
    while(1){
        if(isLOW(buttonPin)){
            setPWM(ledPin, 50);
        }else{
            setPWM(ledPin, 0);
        }
    }
    return 0;
}

Код: Выделить всё

#define setPWM(pin, dutycycle) \
    if (dutycycle > 0){ \
        TCCR0A |= (1 << COM0A1); \
        pin = dutycycle; \
    }else{ \
        TCCR0A &= ~(1 << COM0A1); \
    }

void initPWM(){
    TCCR0A =
        (0 << COM0A0) | //bits COM0A0 remains clear and COM0A1 should be set as 1, which (in Fast PWM mode) clears OC0A 
        (0 << COM0A1) | //on compare-match, and sets OC0A at BOTTOM; bit COM0A1 will be set later by setPWM macro in code
        (1 << WGM00) |
        (1 << WGM01);   //set bits WGM00 and WGM01, which (when combined with WGM02 from TCCR0B below) enables Fast PWM mode
    TCCR0B =
        (0 << WGM02) |  //bit WGM02 remains clear, which (when combined with WGM00 and WGM01 from TCCR0A above) enables Fast PWM mode
        (1 << CS00);    //set bits CS01 (leaving CS01 and CS02 clear), which tells Timer/Counter-0 to not use a prescalar
}

Код: Выделить всё

#define F_CPU 1000000UL
 
#include <util/delay.h>

Код: Выделить всё

#define F_CPU 1000000UL
#include <avr/io.h>
#include <util/delay.h>

Код: Выделить всё

/opt/arduino-1.0.6/hardware/tools/avr/bin/avr-g++ -c -g -Os -Wall -fno-exceptions -ffunction-sections -fdata-sections -mmcu=attiny45 -DF_CPU=1000000L -MMD -DUSB_VID=null -DUSB_PID=null -DARDUINO=106 -I/opt/arduino-1.0.6/hardware/arduino/cores/arduino -I/home/me/sketchbook/hardware/attiny/variants/tiny8 /tmp/build6896905435354427440.tmp/TestFCPU.cpp -o /tmp/build6896905435354427440.tmp/TestFCPU.cpp.o
...
opt/arduino-1.0.6/hardware/tools/avr/bin/avr-gcc -Os -Wl,--gc-sections -mmcu=attiny45 -o /tmp/build6896905435354427440.tmp/TestFCPU.cpp.elf /tmp/build6896905435354427440.tmp/TestFCPU.cpp.o /tmp/build6896905435354427440.tmp/core.a -L/tmp/build6896905435354427440.tmp -lm 
/opt/arduino-1.0.6/hardware/tools/avr/bin/avr-objcopy -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 /tmp/build6896905435354427440.tmp/TestFCPU.cpp.elf /tmp/build6896905435354427440.tmp/TestFCPU.cpp.eep 
/opt/arduino-1.0.6/hardware/tools/avr/bin/avr-objcopy -O ihex -R .eeprom /tmp/build6896905435354427440.tmp/TestFCPU.cpp.elf /tmp/build6896905435354427440.tmp/TestFCPU.cpp.hex 
Binary sketch size: 132 bytes (of a 4,096 byte maximum)

Код: Выделить всё

avr-gcc -mmcu=attiny45 -Os -Wall -DF_CPU=1000000L -Os -I/usr/include -c main.c -o obj/Release/main.o
avr-g++ -L/usr/lib -o bin/Release/TestFCPU.elf obj/Release/main.o  -mmcu=attiny45  
Output file is bin/Release/TestFCPU.elf with size 3,66 KB
Running project post-build steps
avr-size bin/Release/TestFCPU.elf
   text       data        bss        dec        hex    filename
     82          0          0         82         52    bin/Release/TestFCPU.elf
avr-objcopy -R .eeprom -R .fuse -R .lock -R .signature -O ihex bin/Release/TestFCPU.elf bin/Release/TestFCPU.hex
avr-objcopy --no-change-warnings -j .eeprom --change-section-lma .eeprom=0 -O ihex bin/Release/TestFCPU.elf bin/Release/TestFCPU.eep