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main2.c
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main2.c
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/*
* PEST REPELLENT DEVICE with 40kHZ ultrasonic transducers
* ATTINY85 fuses have to be set for 16,5 MHz internal clock
* Resistor Ladder 5-bit Digital-to-Analog converter
* (C) Adam Loboda 2021, adam.loboda@wp.pl
*/
#include <stdint.h>
#include <util/delay.h>
#include <stdbool.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
// PIN - PORT ASSIGNMENT DEFINITION FOR 5-BIT DAC DEVICE
#define OUTPUTPORT PORTB
#define OUTPUTPORTCTRL DDRB
// DEFINE 32 VALUES for ULTRASONIC WAVE SHAPE
// VIA 5-BIT Digital to Analog conversion
// sinusoidal waveform created in Excell / Libreoffice - repeated 100 times
const uint8_t waveshape[] PROGMEM =
{
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
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30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
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18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
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30, 29, 27, 26, 23, 21, 18, 15,
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0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15,
18, 21, 23, 26, 27, 29, 30, 30,
30, 29, 27, 26, 23, 21, 18, 15,
12, 9, 7, 4, 3, 1, 0, 0,
0, 1, 3, 4, 7, 9, 12, 15
};
int main(void)
{
uint16_t sequence;
uint8_t dacvalue;
uint8_t pulseset;
// SET OUTPUT PIN ON ALL OUTPUT PORTS
OUTPUTPORTCTRL = 0b00011111; //set all 5 LOWER bit pins as output
OUTPUTPORT = 0b00000000; //set all 5 LOWER bit pins to ZERO
//* neverending loop */
while (1)
{
// generating WAVE on BIT0-BIT5 DAC outputs
// with values taken from PROGMEM WAVE definition
// sending 8 sequences of 100pulses and 20 pauses with higher frequency
for(pulseset=0; pulseset<8; pulseset++)
{
// gives exact 42 kHz with 16,5 MHz clock of ATTINY85
// sending 100 sinusoidal pulses
for(sequence=0; sequence<3199; sequence++)
{
dacvalue = pgm_read_byte(waveshape + sequence) ;
OUTPUTPORT = dacvalue;
// now delay to achieve desired frequency
asm volatile (
" nop \n"
" nop \n" );
};
// send 25 cycles of pause
for(sequence=0; sequence<799; sequence++)
{
dacvalue = pgm_read_byte(waveshape + sequence) ;
// reading values from lookup table but sending 0 to output
OUTPUTPORT = 0;
// now delay to achieve desired frequency
asm volatile (" nop \n" );
}; // end of sequence loop
}; // end of pulseset loop
// now the bigger pause
// send 1000 empty cycles of pause
for(pulseset=0; pulseset<10; pulseset++)
{
for(sequence=0; sequence<3199; sequence++)
{
dacvalue = pgm_read_byte(waveshape + sequence) ;
// reading values from lookup table but sending 0 to output
OUTPUTPORT = 0;
// now delay to achieve desired frequency
asm volatile (" nop \n" );
}; // end of sequence loop
}; // end of pulseset loop
// sending 8 sequences of 100pulses and 20 pauses with lower frequency
for(pulseset=0; pulseset<8; pulseset++)
{
// gives 39 kHz with 16,5 clock of ATTINY85
// sending 100 pulses on lower frequency
for(sequence=0; sequence<3199; sequence++)
{
dacvalue = pgm_read_byte(waveshape + sequence) ;
OUTPUTPORT = dacvalue;
// now delay to achieve desired frequency
asm volatile (
" nop \n"
" nop \n"
" nop \n" );
};
// send 25 cycles of pause
for(sequence=0; sequence<799; sequence++)
{
dacvalue = pgm_read_byte(waveshape + sequence) ;
// reading values from lookup table but sending 0 to output
OUTPUTPORT = 0;
// now delay to achieve desired frequency
asm volatile (" nop \n" );
}; // end of sequence loop
}; // end of pulseset loop
// now the bigger pause
// send 1000 empty cycles of pause
for(pulseset=0; pulseset<10; pulseset++)
{
for(sequence=0; sequence<3199; sequence++)
{
dacvalue = pgm_read_byte(waveshape + sequence) ;
// reading values from lookup table but sending 0 to output
OUTPUTPORT = 0;
// now delay to achieve desired frequency
asm volatile (" nop \n" );
}; // end of sequence loop
}; // end of pulseset loop
}; // neverending loop
}; // end of MAIN