268 lines
6.2 KiB
C
268 lines
6.2 KiB
C
/*
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* Project name:
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Demo4_5 : PWM with timer 1 Fast PWM mode at PORTB.5, PB.6 en PB.7
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parallel, 3x, for RGB LED
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* Author: Avans-TI, JW
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* Revision History:
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20101230: - initial release;
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* Description:
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This program gives an interrupt on each ms
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* Test configuration:
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MCU: ATmega128
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Dev.Board: BIGAVR6
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Oscillator: External Clock 08.0000 MHz
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Ext. Modules: -
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SW: AVR-GCC
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* NOTES:
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- Turn ON the PORT LEDs at SW12.1 - SW12.8
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*/
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#define F_CPU 8000000
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#define BIT(x) (1 << (x))
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unsigned int sCount=0, minutes=0, hours=0;
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// wait(): busy waiting for 'ms' millisecond
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// Used library: util/delay.h
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void wait( int ms )
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{
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for (int tms=0; tms<ms; tms++)
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{
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_delay_ms( 1 ); // library function (max 30 ms at 8MHz)
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}
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}
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// Initialize timer 1: fast PWM at pin PORTB.6 (hundredth ms)
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void timer1Init( void )
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{
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OCR1A = 0; // RED, default, off
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OCR1B = 0; // GREEN, default, off
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OCR1C = 0; // BLUE, default, off
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TCCR1A = 0b10101001; // compare output OC1A,OC1B,OC1C
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TCCR1B = 0b00001011; // fast PWM 8 bit, prescaler=64, RUN
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}
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// Set pulse width for RED on pin PB5, 0=off, 255=max
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void setRed( unsigned char red )
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{
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OCR1A = red;
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}
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// Set pulse width for Green on pin PB5, 0=off, 255=max
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void setGreen( unsigned char green )
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{
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OCR1B = green;
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}
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// Set pulse width for Blue on pin PB5, 0=off, 255=max
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void setBlue( unsigned char blue )
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{
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OCR1C = blue;
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}
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// void setGreen( unsigned char green)
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// void setBlue( unsigned char blue)
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// Initialize ADC:
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void adcInit( void )
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{
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ADMUX = 0b11100001; // AREF=2,56 V, result left adjusted, channel1 at pin PF1
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ADCSRA = 0b10000110; // ADC-enable, no interrupt, no free running, division by 64
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}
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// Main program: Counting on T1
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int main( void )
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{
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DDRB = 0xFF;
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DDRF = 0x00; // set PORTF for input (ADC)
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DDRA = 0xFF; // set PORTA for output
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adcInit(); // initialize ADC
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timer1Init();
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while (1)
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{
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ADCSRA |= BIT(6); // Start ADC
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while ( ADCSRA & BIT(6) ) ; // Wait for completion
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setRed(ADCH); // Show MSB (bit 9:2) of ADC
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wait(100); // every 50 ms (busy waiting)
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//opgaveextra();
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alleKleuren();
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}
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}
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int alleKleuren(void)
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{
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DDRB = 0xFF; // set PORTB for compare output
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timer1Init();
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wait(100);
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while (1)
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{
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int delta = 1;
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int delta1 = 1;
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int delta2 = 1;
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setRed (0);
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setBlue(0);
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setGreen(0);
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for (int red = 0; red<=255; red+=delta)
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{
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setRed( red ); // 8-bits PWM on pin OCR1a
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delta += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int green = 0; green<=255; green+=delta1)
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{
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setGreen( green ); // 8-bits PWM on pin OCR1a
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delta1 += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int blue = 0; blue<=255; blue+=delta2)
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{
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setBlue( blue ); // 8-bits PWM on pin OCR1a
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delta2 += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int red = 255; red>=0; red-=delta)
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{
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setRed( red ); // 8-bits PWM on pin OCR1a
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delta -= 2; // progressive steps down
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int green = 255; green>=0; green-=delta1)
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{
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setGreen( green ); // 8-bits PWM on pin OCR1a
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delta1 -= 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int blue = 255; blue>=0; blue-=delta2)
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{
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setBlue( blue ); // 8-bits PWM on pin OCR1a
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delta2 -= 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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}
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}
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// Main program: Counting on T1
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int opgaveextra( void )
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{
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DDRB = 0xFF; // set PORTB for compare output
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timer1Init();
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wait(100);
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while (1)
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{
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int delta = 1;
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setRed (0);
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setBlue(0);
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setGreen(0);
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// change some colors
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// RED
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for (int red = 0; red<=255; red+=delta)
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{
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setRed( red ); // 8-bits PWM on pin OCR1a
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delta += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int red = 255; red>=0; red-=delta)
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{
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setRed( red ); // 8-bits PWM on pin OCR1a
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delta -= 2; // progressive steps down
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wait(100); // delay of 100 ms (busy waiting)
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}
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setRed( 0 );
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delta = 1;
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wait(100);
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// GREEN
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for (int green = 0; green<=255; green+=delta)
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{
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setGreen( green ); // 8-bits PWM on pin OCR1a
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delta += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int green = 255; green>=0; green-=delta)
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{
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setGreen( green ); // 8-bits PWM on pin OCR1a
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delta -= 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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setGreen( 0 );
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delta = 1;
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wait(100);
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// BLUE
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for (int blue = 0; blue<=255; blue+=delta)
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{
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setBlue( blue ); // 8-bits PWM on pin OCR1a
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delta += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int blue = 255; blue>=0; blue-=delta)
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{
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setBlue( blue ); // 8-bits PWM on pin OCR1a
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delta -= 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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setBlue( 0 );
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delta = 1;
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wait(100);
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// YELLOW
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for (int yellow = 0; yellow<=255; yellow+=delta)
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{
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setBlue( yellow );
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setGreen( yellow ); // 8-bits PWM on pin OCR1a
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delta += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int yellow = 255; yellow>=0; yellow-=delta)
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{
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setBlue( yellow );
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setGreen( yellow ); // 8-bits PWM on pin OCR1a
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delta -= 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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setBlue( 0 );
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setGreen( 0 );
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delta = 1;
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wait(100);
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// WHITE
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for (int white = 0; white<=255; white+=delta)
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{
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setBlue( white );
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setRed( white );
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setGreen( white ); // 8-bits PWM on pin OCR1a
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delta += 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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for (int white = 255; white>=0; white-=delta)
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{
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setBlue( white );
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setRed( white );
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setGreen( white ); // 8-bits PWM on pin OCR1a
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delta -= 2; // progressive steps up
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wait(100); // delay of 100 ms (busy waiting)
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}
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setBlue( 0 );
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setGreen( 0 );
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setRed( 0 );
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delta = 1;
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wait(100);
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}
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} |