clean

Microcontrollers/opdracht 1.4/main.c

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+/*
+ * main.c
+ *
+ * Created: 10-Feb-21 9:13:02 AM
+ *  Author: lemms
+ */ 
+
+# define F_CPU 10000000UL
+
+#include <util/delay.h>
+#include <avr/io.h>
+
+typedef enum {
+	false = 0,
+	true = 1
+} bool;
+
+/******************************************************************/
+void wait( int ms )
+/* 
+short:			Busy wait number of milliseconds
+inputs:			int ms (Number of milliseconds to busy wait)
+outputs:	
+notes:			Busy wait, not very accurate. Make sure (external)
+				clock value is set. This is used by _delay_ms inside
+				util/delay.h
+Version :    	DMK, Initial code
+*******************************************************************/
+{
+	for (int i=0; i<ms; i++)
+	{
+		_delay_ms( 1 );		// library function (max 30 ms at 8MHz)
+	}
+}
+
+int main(void)
+{
+	bool dir = false;
+	DDRD = 0b11111111;
+	PORTD = 0b00000001;
+	
+    while(1)
+    {
+        if(PORTD == 0b10000000){
+			dir = true;
+		}
+		
+		if(PORTD == 0b00000001){
+			dir = false;
+		}
+		
+		if(!dir){
+			PORTD <<= 1;
+		} else {
+			PORTD >>= 1;	
+		}
+		
+		wait(80);
+    }
+}