avr-programmierung

/* pwm_1khz_02.c ATmega88 @ 1MHz */
#include <avr/io.h>
 
int main(void)
{
    DDRB |= (1<<PB1); // OC1A = output
    ICR1 = 1000;        // Top Value = 1000
    OCR1A = 700;        // Compare Match bei 700
     
    // Clear OC1A on Compare Match

avr-programmierung

/* pwm_1khz_01.c ATmega88 @ 1MHz */
#include <avr/io.h>
 
int main(void)
{
    DDRB |= (1<<PB2); // OC1B = output
    OCR1A = 999;        // Top value = 999
    OCR1B = 300;        // Compare Match bei 300
     
    // Clear OC1B on Compare Match

avr-programmierung

/* fast_pwm_02.c ATmega88 @ 1MHz */
#include <avr/io.h>
 
int main(void)
{
    DDRB |= (1<<PB1); // OC1A = output
    DDRB |= (1<<PB2); // OC1B = output
    OCR1A = 307;        // Compare match bei 307 = 30% Duty Cycle
    OCR1B = 716;        // Compare match bei 716 = 70% Duty Cycle
     

avr-programmierung

/* fast_pwm_01.c ATmega88 @ 8MHz */
#include <avr/io.h>
 
int main(void)
{
    DDRB |= (1<<PB1);                                     // OC1A = output
    OCR1A = 307;                                            // Compare match bei 307 = 30% Duty Cycle
    TCCR1A = (1 << COM1A1) + (1 << WGM11) + (1 << WGM10); // Lösche OC1A @ Compare Match
    TCCR1B = (1 << WGM12) + (1 << CS11);                    // Mode 7, Fast PWM 10-bit, Prescaler = 8
     

avr-programmierung

/* rectangle_01.c
* Ein 100Hz Rechtecksignal am OC1A (Pin 15) erzeugen
* Controller: ATmega88 @ 1MHz */
 
#include <avr/io.h>
 
int main(void)
{
    DDRB |= (1<<PB1);                     // OC1A = output
    OCR1A = 39999;                          // Compare match auf 39999 setzen

avr-programmierung

/* timer_ctc_mode_01.c ATmega88 @ 8MHz */
#include <avr/io.h>
#include <avr/interrupt.h>
 
#define LED (1<<PB3)          // LED auf Portpin B3
 
int main(void)
{
    DDRB |= (1<<PB3);         // Portpin B3 = output
    TCCR1B |= (1 << CS12);        // Vorteiler auf 256 und Timer start

avr-programmierung

/* timer_normal_mode_01.c ATmega88 @ 8MHz */
#include <avr/io.h>
#include <avr/interrupt.h>
 
#define preload_value 64536     // Timer1 Vorladewert
 
void init_timer_1 (void)
{
    TCCR1A = 0x00;              // Timer1 Normal Mode (Mode 0)
    TCCR1B = (1<<CS11);           // Prescaler = 8 -> 8Mhz/8 = 1MHz

avr-programmierung

/* lauflicht_sr_02.c ATmega88 @ 8MHz */
 
int main(void)
{
    DDRD = 0xFF;            // Richtungsregister PORTD = Ausgang
    PORTD = 0x04;           // PD2 (RCK) = High, 0x04 = 0000 0100
     
    uint8_t k, data = 0x01; // data = 0000 0001
     
    while(1)

avr-programmierung

/* lauflicht_sr_01.c ATmega88 @ 8MHz */
#include <avr/io.h>
#include <util/delay.h>
 
void soft_serial (uint8_t data)     // Funktion soft_serial
{
    for (uint8_t i=0; i<=7; i++)
    {
        if (data & 1)               // Wenn data an Stelle 0 = 1
            PORTD |= (1<<PD0);        // Data serial = 1

avr-programmierung

/* soft_serial_01.c ATmega88 @ 8MHz */
#include <avr/io.h>
 
void soft_serial (uint8_t data)         // Funktion soft_serial
{
    for (uint8_t i=0; i<=7; i++)     // for-Schleife 8 mal ausführen
    {
        if (data & 1)                   // Wenn data an Stelle 0 = 1
            PORTD |= (1<<PD0);            // Data serial = 1
        else