Week 2 t/m opg 3

MIC-Week2/main.c

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+/* ---------------------------------------------------------------------------
+** This software is in the public domain, furnished "as is", without technical
+** support, and with no warranty, express or implied, as to its usefulness for
+** any purpose.
+**
+** ioisr.c
+**
+** Beschrijving:	ISR on PORTD demonstrattion  
+** Target:			AVR mcu
+** Build:			avr-gcc -std=c99 -Wall -O3 -mmcu=atmega128 -D F_CPU=8000000UL -c ioisr.c
+**					avr-gcc -g -mmcu=atmega128 -o ioisr.elf ioisr.o
+**					avr-objcopy -O ihex ioisr.elf ioisr.hex 
+**					or type 'make'
+** Author: 			dkroeske@gmail.com
+** -------------------------------------------------------------------------*/
+
+#define F_CPU 8000000UL //CPU op 8MHz
+#include <avr/io.h>
+#include <util/delay.h>
+#include <avr/interrupt.h>
+
+int opdr;
+/******************************************************************/
+void wait( int ms )
+/* 
+short:			Busy wait number of millisecs
+inputs:			int ms (Number of millisecs 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)
+	}
+}
+
+char data[16] = {		//segment display
+	0b00111111, // 0
+	0b00000110, // 1
+	0b01011011, // 2
+	0b01001111, // 3
+	0b01100110, // 4
+	0b01101101, // 5
+	0b01111101, // 6
+	0b00000111, // 7
+	0b01111111, // 8
+	0b01101111, // 9
+	0b01110111, // A
+	0b01111100, // B
+	0b00111001, // C
+	0b01011110, // D
+	0b01111001, // E
+	0b01110001 // F
+};
+
+/******************************************************************/
+ISR( INT0_vect ) //powerpointopg
+/* 
+short:			ISR INT0
+inputs:			
+outputs:	
+notes:			Set PORTD.5
+Version :    	DMK, Initial code
+*******************************************************************/
+{
+    PORTD |= (1<<5);		
+}
+
+/******************************************************************/
+ISR( INT1_vect )
+{ 
+/* 
+short:			ISR INT1
+inputs:			
+outputs:	
+notes:			Clear PORTD.5
+Version :    	DMK, Initial code
+*******************************************************************/
+	if(opdr==0)
+	{
+		PORTD &= ~(1<<5);		
+	}
+	else if(opdr==1)
+	{
+		shift(1);
+	}
+}
+
+ISR( INT2_vect ) //powerpointopg
+/*
+short:			ISR INT4
+inputs:
+outputs:
+notes:			Clear PORTD.3
+Version :    	DMK, Initial code
+*******************************************************************/
+{
+	shift(0);
+}
+
+ISR( INT4_vect ) //powerpointopg
+/*
+short:			ISR INT4
+inputs:
+outputs:
+notes:			Clear PORTD.3
+Version :    	DMK, Initial code
+*******************************************************************/
+{
+	PORTE ^= 0x01; //PE0
+}
+
+/******************************************************************/
+int main( void )
+/*
+short:			main() loop, entry point of executable
+inputs:			
+outputs:	
+notes:			Slow background task after init ISR
+Version :    	DMK, Initial code
+*******************************************************************/
+{
+	//powerpointOpg();
+	//opgave2();
+	opgave3();
+
+	return 1;
+}
+
+void powerpointOpg(void)
+{
+	// Init I/O
+	DDRD = 0xF0;			// PORTD(7:4) output, PORTD(3:0) input
+	DDRE = 0x0F;			// PORTE(7:4) input, PORTE(3:0) output
+
+	// Init Interrupt hardware
+	EICRA |= 0x0B;			// INT1 falling edge, INT0 rising edge
+	EICRB |= 0x02;			// INT4 falling edge
+	EIMSK |= 0x13;			// Enable INT1 & INT0 & INT4
+
+
+	// Enable global interrupt system
+	//SREG = 0x80;			// Of direct via SREG of via wrapper
+	opdr=0;
+	sei();
+	
+
+	while (1)
+	{
+		PORTD ^= (1<<7);	// Toggle PORTD.7
+		wait( 500 );
+	}
+}
+
+void opgave2(void)
+{
+	DDRD = 0xF0;	//PORTD(7:4) output, PORTD(3:0) input
+	DDRC = 0xFF;	//PORTC(7:0) output;
+	PORTC= 0x1;
+
+	EICRA |= 0x28;		//INT1 en INT2 falling edge 
+	EIMSK |= 0x06;
+	opdr=1;
+	sei();
+
+	while(1)
+	{
+		wait(500);
+	}
+}
+
+void shift(int i)
+{
+
+	if(i)
+		PORTC = (PORTC>>1);
+	else
+		PORTC = (PORTC<<1);
+		
+	//Als het looplicht aan het einde is
+	if (PORTC >= 0x80)
+	{
+		PORTC= 0x01;
+	}
+	//Als het looplicht aan het begin is
+	else if (PORTC < 0x1)
+	{
+		PORTC= 0x80;
+	}
+}
+
+void opgave3()
+{
+	DDRC = 0x00;
+	DDRD = 0xFF;
+
+	int count = 0;
+
+	while(1)
+	{
+		if(0b00000001 & PINC == 0b00000001)
+		{
+			count++;
+		}
+		else if(0b00000010 & PINC == 0b00000010)
+		{
+			count--;
+		}
+
+		if(count > 15)
+			display(14);
+		else if(count < 0)
+			display(14);
+		else
+			display(count);
+	}
+}
+void display(int d)
+{
+	PORTD = data[d];
+}