[ADD] reading echo in oscilloscope

Microcontrollers/ultrasonicSensor/main.c

@@ -0,0 +1,54 @@
+/*
+ * ultrasonicSensor.c
+ *
+ * Created: 17-3-2021 09:47:12
+ * Author : Sem
+ 
+ timer aanzetten met tccrn2
+ interrupt op falling edge van echo
+ in interrupt timer op 0 zetten en tccrn2 op 0
+ 
+ */ 
+#define F_CPU 20e6
+
+#include <avr/io.h>
+#include <util/delay.h>
+
+#include "lcd_control.h"
+
+void wait_us(unsigned int us)
+{
+	for(int i = 0; i < us; i++)
+	{
+		_delay_us(1);
+	}
+}
+
+void wait_ms(unsigned int ms)
+{
+	
+	for(int i = 0; i < ms; i++)
+	{
+		_delay_ms(1);
+	}
+}
+
+
+int main(void)
+{
+	DDRG = 0x01; // port g pin 0 on output, 1 on input. 0 is trig, 1 is echo
+	
+	
+    /* Replace with your application code */
+    while (1) 
+    {
+		PORTG = 0x00; // 10 us low pulse
+		wait_us(10);
+		PORTG = 0x01;
+		
+		wait_ms(100);
+    }
+}
+
+
+