Variante 2 - Warum berechnen, was man sich merken kann?
variante2.zip - Download des Projektes
#include <avr/io.h>
volatile unsigned char data[720] = {
125, 126, 127, 128, 129, 130, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 161, 162, 163,
164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181,
182, 183, 184, 185, 186, 187, 188, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198,
198, 199, 200, 201, 202, 203, 204, 205, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213,
213, 214, 215, 216, 216, 217, 218, 219, 219, 220, 221, 221, 222, 223, 224, 224, 225, 225,
226, 227, 227, 228, 229, 229, 230, 230, 231, 232, 232, 233, 233, 234, 234, 235, 235, 236,
236, 237, 237, 238, 238, 239, 239, 240, 240, 240, 241, 241, 242, 242, 242, 243, 243, 244,
244, 244, 245, 245, 245, 245, 246, 246, 246, 247, 247, 247, 247, 247, 248, 248, 248, 248,
248, 249, 249, 249, 249, 249, 249, 249, 250, 250, 250, 250, 250, 250, 250, 250, 250, 250,
250, 250, 250, 250, 250, 250, 250, 250, 250, 250, 250, 249, 249, 249, 249, 249, 249, 249,
248, 248, 248, 248, 248, 247, 247, 247, 247, 247, 246, 246, 246, 245, 245, 245, 245, 244,
244, 244, 243, 243, 242, 242, 242, 241, 241, 240, 240, 240, 239, 239, 238, 238, 237, 237,
236, 236, 235, 235, 234, 234, 233, 233, 232, 232, 231, 230, 230, 229, 229, 228, 227, 227,
226, 225, 225, 224, 224, 223, 222, 221, 221, 220, 219, 219, 218, 217, 216, 216, 215, 214,
213, 213, 212, 211, 210, 209, 209, 208, 207, 206, 205, 205, 204, 203, 202, 201, 200, 199,
198, 198, 197, 196, 195, 194, 193, 192, 191, 190, 189, 188, 188, 187, 186, 185, 184, 183,
182, 181, 180, 179, 178, 177, 176, 175, 174, 173, 172, 171, 170, 169, 168, 167, 166, 165,
164, 163, 162, 161, 159, 158, 157, 156, 155, 154, 153, 152, 151, 150, 149, 148, 147, 146,
145, 143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 130, 129, 128, 127, 126,
125, 124, 123, 122, 121, 120, 118, 117, 116, 115, 114, 113, 112, 111, 110, 109, 108, 107,
105, 104, 103, 102, 101, 100, 99, 98, 97, 96, 95, 94, 93, 92, 91, 89, 88, 87,
86, 85, 84, 83, 82, 81, 80, 79, 78, 77, 76, 75, 74, 73, 72, 71, 70, 69,
68, 67, 66, 65, 64, 63, 62, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52,
52, 51, 50, 49, 48, 47, 46, 45, 45, 44, 43, 42, 41, 41, 40, 39, 38, 37,
37, 36, 35, 34, 34, 33, 32, 31, 31, 30, 29, 29, 28, 27, 26, 26, 25, 25,
24, 23, 23, 22, 21, 21, 20, 20, 19, 18, 18, 17, 17, 16, 16, 15, 15, 14,
14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 7, 7, 6,
6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2,
2, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6,
6, 6, 7, 7, 8, 8, 8, 9, 9, 10, 10, 10, 11, 11, 12, 12, 13, 13,
14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 20, 20, 21, 21, 22, 23, 23,
24, 25, 25, 26, 26, 27, 28, 29, 29, 30, 31, 31, 32, 33, 34, 34, 35, 36,
37, 37, 38, 39, 40, 41, 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 50, 51,
52, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 62, 63, 64, 65, 66, 67,
68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85,
86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104,
105, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 120, 121, 122, 123, 124
};
int main(void)
{
int i;
//Für das Warten Timer2 verwenden:
//Teiler CS22 CS21 CS20
//001 1
//010 8
//011 32
//100 64
//101 128
//110 256
//111 1024
TCCR2 = (1<<FOC2) | (0<<WGM20) | (0<<COM21) | (0<<COM20) | (0<<WGM21) | (1<<CS22) | (0<<CS21) | (0<<CS20);
//Für das Senden des PWM-Signals Timer1 verwenden;
//Teiler CS12 CS11 CS10
//001 1
//010 8
//011 64
//100 256
//101 1024
TCCR1A = (1<<COM1A1) | (0<<COM1A0) | (1<<COM1B1) | (0<<COM1B0) | (0<<FOC1A) | (0<<FOC1B) | (0<<WGM11) | (0<<WGM10);
TCCR1B = (0<<ICNC1) | (0<<ICES1) | (1<<WGM13) | (0<<WGM12) | (0<<CS12) | (0<<CS11) | (1<<CS10); //Teilung 1
DDRD |= (1<<PB5) | (1<<PB4); //auf Ausgang setzen.
//PWM-Frequenz durch Setzen von TOP festlegen:
ICR1 = 250;
//fpwm = 9216000/(2*TOP*1)=18432Hz
TCNT2=0;
i=0;
while(true)
{
OCR1A = data[i]; //1Hz Schwingung
i++;
i%=720;
while(TCNT2<200); //Samplingrate mit der die PWM-Breite verstellt wird: 9216000/(64*200)=720Hz
TCNT2=0;
}
return 0;
}
Code 0-1: Programmcode