digitalpotans.c

/*  Author: Steve Gunn, Ivan Ling
 * Licence: This work is licensed under the Creative Commons Attribution License.
 *          View this license at http://creativecommons.org/about/licenses/
 */

#include <util/delay.h>
#include "spi.h"

#define READ	0x11  //Hint: Page 45 of datasheet
#define WRITE	0x00
#define	INC		0x04
#define	DEC		0x08
#define	POT0	0x00  //Hint: Volatile wiper 0
#define	POT1	0x10 //Hint: Volatile wiper 1


void init_pot(void)
{
	init_spi_master();
}

void decXpot(void)
{
    spi_tx(POT0 | DEC); //0x08
	/* TODO: Code to decrement first pot by 1 */
}

void incXpot(void)
{
    spi_tx(POT0 | INC); //0x04
	/* TODO: Code to increment first pot by 1 */
}

void decYpot(void)
{
    spi_tx(POT1 | DEC);  //0x18
	/* TODO: Code to decrement second pot by 1 */
}

void incYpot(void)
{ 
    spi_tx(POT1 | INC);  //0x14
	/* TODO: Code to increment second pot by 1 */
}

void setXpot(uint8_t x)
{
    spi_tx(POT0 | WRITE);  //0x00
	spi_tx(x);
	/* TODO: Code to set first pot to a value between 0 and 255 */
}

void setYpot(uint8_t y)
{
    spi_tx(POT1 | WRITE);   //0x10
	spi_tx(y);
	/* TODO: Code to set second pot to a value between 0 and 255 */
}

/*
int main()
{
	init_pot();
	
	setYpot(0);
	setYpot(0);
	return 0;
}
*/