55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#define F_CPU 1000000UL
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#include <stdint.h>
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#include <avr/io.h>
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#include <util/delay.h>
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/*
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// f=20MHz -> T=0,05 µs
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uint8_t T0H = 6; // == 0.3 µs ~ 0.4 µs (+- 150ns) == [0.25, 0.55] µs
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uint8_t T1H = 14; // == 0.7 µs ~ 0.8 µs (+- 150ns) == [0.65, 0.95] µs
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uint8_t T0L = 15; // == 0.75 µs ~ 0.85µs (+- 150ns) == [0.70, 1.00] µs
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uint8_t T1L = 8; // == 0.35 µs ~ 0.45µs (+- 150ns) == [0.30, 0.60] µs
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uint8_t RES = 51; // > 50 µs
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*/
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#define wait6 __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t")
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#define wait8 __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t")
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#define wait14 __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t")
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#define wait15 __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t")
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inline void writeZero() {
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PORTB = 1;
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wait6;
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PORTB = 0;
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wait15;
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}
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inline void writeOne() {
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PORTB = 1;
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wait14;
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PORTB = 0;
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wait8;
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}
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int main2() {
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DDRB = 1; // PORT C0 output
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do{
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writeZero();writeZero();writeZero();writeZero();writeZero();writeZero();writeZero();writeZero();
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writeZero();writeZero();writeZero();writeZero();writeZero();writeZero();writeZero();writeZero();
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writeOne();writeOne();writeOne();writeOne();writeOne();writeOne();writeOne();writeOne();
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_delay_ms(1);
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}while(1);
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}
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int main( void )
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{
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DDRC |= (1 << PC0);
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while(1) {
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PORTC ^= (1 << PC0);
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_delay_ms(1000);
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}
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return 0;
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}
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