62 lines
982 B
C
62 lines
982 B
C
/*
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* ultrasonicSensor.c
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*
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* Created: 17-3-2021 09:47:12
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* Author : Sem
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ultrasoon op timer 1 want 16 bits
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timer aanzetten met tccrn1
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interrupt op falling edge van echo
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in interrupt timer op 0 zetten en tccrn1 op 0
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interrupt op rising edge in echo,
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dan timer aanzetten
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en interrupt zetten op falling edge in echo
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als falling edge interrupt geeft ->
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waarde uit timer uitlezen
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en formule gebruiken high level time * velocity (340M/S) / 2
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*/
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#define F_CPU 20e6
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#include <avr/io.h>
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#include <util/delay.h>
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#include "lcd_control.h"
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void wait_us(unsigned int us)
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{
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for(int i = 0; i < us; i++)
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{
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_delay_us(1);
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}
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}
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void wait_ms(unsigned int ms)
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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);
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}
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}
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int main(void)
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{
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DDRG = 0x01; // port g pin 0 on output, 1 on input. 0 is trig, 1 is echo
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/* Replace with your application code */
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while (1)
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{
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PORTG = 0x00; // 10 us low pulse
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wait_us(10);
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PORTG = 0x01;
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wait_ms(100);
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}
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}
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