標(biāo)題: ATtiny13-RGB-LED-Colormixer源程序 [打印本頁(yè)]
作者: pannygg    時(shí)間: 2018-8-6 22:29
標(biāo)題: ATtiny13-RGB-LED-Colormixer源程序
RGB LED MIXER- In this project we used the attiny 13 microcntroller for operating the RGB LED AND COLOR MIXING.


單片機(jī)源程序如下:

  2. /*
  3. Chapter - 2
  4. Project - 3 RGB Colormixer

  6. */

  8. #include<avr/io.h>
  9. #include<avr/interrupt.h>
  10. #define F_CPU 9600000UL
  11. #include<util/delay.h>

  13. //Prototypes

  15. //This function is called to switch on the LED at the
  16. //Required stage of PWM cycle
  17. void abc(unsigned char a,unsigned char b,unsigned char c,unsigned char status);

  19. //This function read the value of ADC from selected channel
  20. unsigned char read_adc(unsigned char channel);


  23. //Global variables
  24. volatile unsigned char e;
  25. volatile unsigned char pwm[3]={255,255,255};


  28. int main(void)
  29. {


  32.         DDRB  &= ~((1<<3)|(1<<4)|(1<<5));//ADC inputs
  33.        
  34.         //Initially LEDs should be off
  35.         DDRB |=  (1<<0|1<<1|1<<2);
  36.         PORTB |= (1<<0)|(1<<1)|(1<<2);
  37.        
  38.         //ADC init
  39.        
  40.         ADMUX =  0b00100000; //ADC0 (default),ADLAR,VCc
  41.         ADCSRA = 0b10000010; //prescaled by 4
  42.        
  43.         //Timer Initialisation
  44.         TCCR0A = 0x00;
  45.         TCCR0B = 0x01;//No Prescaling
  46.         TIMSK0 = 1<<TOIE0;//Overflow Interrupt Enabled
  47.         sei();//Global Interrupts Enabled

  49.         while(1)
  50.         {       
  51.        
  52.                 pwm[0]=read_adc(0);
  53.                 pwm[1]=read_adc(2);
  54.                 pwm[2]=read_adc(3);
  55.                
  56.                 _delay_ms(2);//Just a small delay       
  57.        
  58.         }

  60.        

  62. }


  65. //Overflow routine for Timer 0
  66. ISR(TIM0_OVF_vect)
  67. {
  68.        
  69.         //Value of e decides the no of levels of PWM.
  70.         //This has 256 levels for e - 0 to 255
  71.         //0 - complete on and 255 is complete off
  72.        
  73.         if(e==255)
  74.         {
  75.                 e=0;
  76.                 PORTB |= (1<<0)|(1<<1)|(1<<2);
  77.         }

  79.         abc(pwm[0],pwm[1],pwm[2],e);
  80.        
  81.         e++;
  82.        
  83. }


  86. //This function is called to switch on the LED at the
  87. //Required stage of PWM cycle
  88. void abc(unsigned char a,unsigned char b,unsigned char c,unsigned char status)
  89. {

  91.         if((status==a))
  92.         {
  93.                 PORTB&= ~(1<<0);
  94.         }
  95.         if((status==b))
  96.         {
  97.                 PORTB&= ~(1<<1);
  98.         }
  99.         if((status==c))
  100.         {
  101.                 PORTB&= ~(1<<2);
  102.         }
  103.        
  104. }

  106. //This function read the value of ADC from selected channel
  107. unsigned char read_adc(unsigned char channel)
  108. {
  109.        
  110.         unsigned char k;
  111.         unsigned int adcvalue=0;
  112.         ADMUX = ADMUX&(0b11111100); //clear channel select bits
  113.         ADMUX |= channel;        
  114.        
  115.         //neglect first reading after changing channel
  116.         ADCSRA |= 1<<ADSC;
  117.         while(ADCSRA&(1<<ADSC));//Wait
  118.         adcvalue=ADCH;
  119.         adcvalue=0;//neglectreading
  120.         for(k=0;k<=7;k++)
  121.         {
  122.                 ADCSRA |= 1<<ADSC;
  123.                 while(ADCSRA&(1<<ADSC));//Wait
  124.                 adcvalue += ADCH;
  125.         }
  126.         return (adcvalue>>3); //divide by 8
  127.        
  128. }

復(fù)制代碼

所有資料51hei提供下載:
Project-3-RGB-LED-Colormixer.rar (116.49 KB, 下載次數(shù): 21)


作者: 1106998808    時(shí)間: 2019-10-30 16:40
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