8/2/2019 Serial Mouse Program

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SERIAL MOUSE PROGRAM

#include //Header File

void default(); //function declarations

void mov1(int m);

void mov2(int m);

void mov3(int m);

void mov4(int m);

void mov5(int m);

void mov6(int m);

void mov7(int m);

void mov8(int m);

void divide1(int p);

void divide2(int q);

void click();

void interrupt ext()

void usartinit()

void ExternalInt()

void adc();

int x,y,u,m,c,p,q;/

***********************************************************************/

/*MainFunction */

/

***********************************************************************/

void main()

{

uartinit(); //call UART transmission

intializing function

ExternalInt(); //call External Interrupt

intializing function

default(); //call Default Condition function

while(1) //infinite loop

{

RB3=1; //Pin 3 of port B is made

high(5v) & Pin 2 is made low

RB2=0; //for making left side 0v and right 5v.

x=adc(); //adc function initialized

for finding x coordinate digital

//value

if(x>90)

{

RB3=0; //Top side is made 0v and bottom 5v

RB2=1;

y=adc(); //adc function initialized

finding y coordinate digital

//valuedivide1(x); //divide function called to find

how much movements

//to the right

divide2(y); //divide function called to find

how much movements

//to the bottom

click(); // mouse click function

default(); // function for mouse default

position and check for

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//touch

}

}

}

/

***********************************************************************/

/*Interrupt*/

/

***********************************************************************/

void interrupt ext()

{

INTF=0; //interrupt enable

TXREG='M'; //to make the PC detect the

touchscreen as mouse

while(TRMT==0) //check whether transmission over

{

}

}

/

***********************************************************************/

/*Default*//

***********************************************************************/

void default()

{

TXREG=0x43; // move mouse to default position

while(TRMT==0);

TXREG=0x43;

while(TRMT==0);

TXREG=0x43;

while(TRMT==0);

}

/

***********************************************************************/

/*ADC*/

/

***********************************************************************/

void adc()

{

TRISA=0XFF; //PORTA initialization ADCON1=0X80;

while(1)

{

ADCON0=0XA1; /*for ADC controlling process*/

ADGO=1; /*A/D convertet

module enable*/

while(ADGO==1)c=ADRESH; /*loading MSB of ADC

value*/

c=c

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/

***********************************************************************/

/*Division for x coordinate. The Adc value is first

divided by set values inorder to obtain mouse commands in Microsoft

format. */

/

***********************************************************************/

void divide1(p)

{

if(p>=400)

{

m=p%400; // adc value divided with set value 400 and

remainder is found out

p=p/400; //quotient is taken as p

mov1(p); //the quotient is sent to move function

}

if(m>=180)

{

p=m;m=p%180;

p=p/180;

mov2(p);

}

if(m>=50)

{

p=m;

m=p%50;

p=p/50;

mov3(p);

}

if(m>=10)

{p=m;

m=p%10;

p=p/10;

mov4(p);

}

}

/

***********************************************************************/

/*Division for y coordinate. The Adc value is first

divided by set values inorder to obtain mouse commands in Microsoft

format. */

/***********************************************************************/

void divide2(q)

{

if(q>=400)

{

m=q%400; //adc value divided with set value 400 and

remainder is found out

q=q/400; //quotient is taken as q

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mov5(q); //the quotient is sent to move function

}

if(m>=180)

{

q=m;

m=q%180;

q=q/180;

mov6(q);

}

if(m>=50)

{

q=m;

m=q%50;

q=q/50;

mov7(q);

}

if(m>=10)

{

q=m;

m=q%10;q=q/10;

mov8(q);

}

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to move 400 pixels

to the right */

/

***********************************************************************/

void mov1(m)

{

while(m>0)

{

TXREG=0X41;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

TXREG=0X3F;

while(TRMT==0);

m=m-1;

}

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to move 180 pixelsto the right */

/

***********************************************************************/

void mov2(m)

{

while(m>0)

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{

TXREG=0X40;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

TXREG=0X3F;

while(TRMT==0);

m=m-1;

}

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to move 50 pixels

to the right

*//********************************************************************

***/

void mov3(m)

{

while(m>0)

{

TXREG=0X40;while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

TXREG=0X3F;

while(TRMT==0);

m=m-1;

}

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to move 10 pixels to the right

*/

/

***********************************************************************/

void mov4(m)

{

while(m>0)

{

TXREG=0X40;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);TXREG=0X3F;

while(TRMT==0);

m=m-1;

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to move 400 pixels to the bottom */

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/

***********************************************************************/

void mov5(m)

{

while(m>0)

{

TXREG=0X44;

while(TRMT==0);

TXREG=0X3F;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

m=m-1;

}

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to move 180 pixels to the bottom */

/

***********************************************************************/

void mov6(m){

while(m>0)

{

TXREG=0X40;

while(TRMT==0);

TXREG=0X3F;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

m=m-1;

}

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to move 50 pixels to the bottom */

/

***********************************************************************/

void mov7(m)

{

while(m>0)

{

TXREG=0X40;

while(TRMT==0);

TXREG=0X17;

while(TRMT==0);TXREG=0X00;

while(TRMT==0);

m=m-1;

}

}

/

***********************************************************************/

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/*Mouse commands in Microsoft format to move 10 pixels to the bottom */

/

***********************************************************************/

void mov8(m)

{

while(m>0)

{TXREG=0x40;

while(TRMT==0);

TXREG=0x08;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

m=m-1;

}

}

/

***********************************************************************/

/*Mouse commands in Microsoft format to click the point of touch */

/

***********************************************************************/

void click(){

TXREG=0X6f;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

TXREG=0X00;

while(TRMT==0);

}

/

***********************************************************************/

/*UART Transmission */

/

***********************************************************************/

void usartinit()

{

TXEN=1; /*transmission enable*/

BRGH=0; /*low baud rate*/

SYNC=0; /*asynchronous mode*/

SPBRG=255; /* Baude rate set to 1200*/

SPEN=1; /*serial port enable*/

}

/***********************************************************************/

/*Interrupt Initialization*/

/

***********************************************************************/

void ExternalInt()

{

PEIE=1; //peripheral interrupt enable bit: Enabled

GIE=1; //Global interrupt enable bit: Enabled

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INTE=1; //External Interrupt Enable bit: Enabled

RBPU=0; //PORTB Pull up enable bit: Enabled

INTEDG=1; // Interrupt edge select: Interrupt on rising

edge

TRISB=0X01; // external interrupt set

}