61 lines
1008 B
C
61 lines
1008 B
C
/*
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* main.c
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*
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* Created: 10-Feb-21 9:13:02 AM
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* Author: lemms
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*/
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# define F_CPU 10000000UL
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#include <util/delay.h>
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#include <avr/io.h>
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typedef enum {
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false = 0,
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true = 1
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} bool;
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/******************************************************************/
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void wait( int ms )
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/*
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short: Busy wait number of milliseconds
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inputs: int ms (Number of milliseconds to busy wait)
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outputs:
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notes: Busy wait, not very accurate. Make sure (external)
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clock value is set. This is used by _delay_ms inside
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util/delay.h
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Version : DMK, Initial code
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*******************************************************************/
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{
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for (int i=0; i<ms; i++)
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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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int main(void)
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{
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bool dir = false;
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DDRD = 0b11111111;
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PORTD = 0b00000001;
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while(1)
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{
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if(PORTD == 0b10000000){
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dir = true;
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}
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if(PORTD == 0b00000001){
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dir = false;
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}
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if(!dir){
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PORTD <<= 1;
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} else {
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PORTD >>= 1;
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}
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wait(80);
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}
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}
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