37 lines
792 B
C
37 lines
792 B
C
/* main.c
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*
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*
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* Created: 9/24/2019 2:15:19 PM
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* Author: wfarmer, dlenfesty
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*/
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// CLKDIV8 was set on our processor
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#define F_CPU 1200000UL
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#define ON_TIME 9 // On time for pulses, accounting for overhead
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#define END_TIME 87.5 // Off time at the end of the pulse train (tuned for overhead + clock drift)
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#define NUM_PULSES 15
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#include <avr/io.h>
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#include <util/delay.h>
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int main(void) {
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DDRB |= (1 << DDB3);
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// Set PB5 low
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PORTB &= ~(1 << PORTB3);
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// Main loop
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while (1) {
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// Loop for all pulses, high then low, excluding 15th low pulse, which is 100us
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for (uint8_t i = 0; i < (NUM_PULSES * 2) - 1; i++) {
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// Toggle PB5
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PORTB ^= (1 << PORTB3);
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_delay_us(ON_TIME);
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}
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// Last low pulse
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PORTB &= ~(1 << PORTB3);
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_delay_us(END_TIME);
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}
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}
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