Magic Screen Machine

Description:

The Magic Screen Machine.

Schematic:

I used my generic ATMega8 development board

Source:

Source for ATMega8 running at 12mhz.

/* Playing with getting the small stepper motors driven. */

/* Standard Includes */
#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
//#define F_CPU 1000000UL
#define F_CPU 12000000
#include <util/delay.h>

/* Clockwise order */
#define POSX1	_BV(PC0)
#define POSX2	_BV(PC1)
#define POSX3	_BV(PC2)
#define POSX4	_BV(PC3)

#define POSY1	0b00000001;
#define POSY2	0b00000010;
#define POSY3	0b00000100;
#define POSY4	0b00001000;

static int xAxis(int direction)
{
	static int step=0;
	if (direction==1) { step=step+1; }
	if (step>4) { step=1; }
	if (direction==0) { step=step-1; }
	if (step<1) { step=4;}
	switch (step)
	{
		case 1: PORTC = POSX1; break;
		case 2: PORTC = POSX2; break;
		case 3: PORTC = POSX3; break;
		case 4: PORTC = POSX4; break;
	}

}
static int yAxis(int direction)
{
	static int step=0;
	if (direction==1) { step=step+1; }
	if (step>4) { step=1; }
	if (direction==0) { step=step-1; }
	if (step<1) { step=4;}
	switch (step)
	{
		case 1: PORTB = POSY1; break;
		case 2: PORTB = POSY2; break;
		case 3: PORTB = POSY3; break;
		case 4: PORTB = POSY4; break;
	}

}

int main(void)
{
	
	const uint8_t delay = 500;
	int td=delay;
	int x=0,y=0;
	int h=0,v=0;
	int ys=0,xs=0;
	DDRC = 0xff;                  /* Enable output on all of the B pins */
	PORTC = 0x00;                 /* Set them all to 0v */
	DDRB = 0xff;                  /* Enable output on all of the B pins */
	PORTB = 0x00;                 /* Set them all to 0v */
	
	while(1)
	{                     /* main loop here */
		td=25;
		v=500;
		ys=10;
		for (h=0; h<v; h++)
		{
			for (x=0; x<h; x++)
			{
				for (y=0; y<ys; y++) { xAxis(1); _delay_ms(td); }
			}
			h++;
			for (x=0; x<(h); x++)
			{
				for (y=0; y<ys; y++) { yAxis(1); _delay_ms(td); }
			}
			h++;
			for (x=0; x<(h); x++)
			{
				for (y=0; y<ys; y++) { xAxis(0); _delay_ms(td); }
			}
			h++;
			for (x=0; x<(h); x++)
			{
				for (y=0; y<ys; y++) { yAxis(0); _delay_ms(td); }
			}
		}

}
}

Notes:

Inspired by etch-cnc

License:

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.