IR frame like serial mouse driver

myrmidon · 09-20-2007, 02:58 PM

Hi to all,

i have a big problem,

I have a IR frame with which i communicate via serial port with AT commands.Its work's very well in my application.

Now i want to use it like mouse under X.

I realized that under console gpm is responsible as mouse server.

Now in which format or protocol should i send data-s to gpm ?
I do understand that my code should be a module driver. That's not a big trouble,
but how can i send and in which format should format the data from my driver to gpm ???

And is that protocol ok for my X in XFree46 conf file ?

I communicate to my frame like (serial port 9600 8n1):

me> AT
frame< OK

me> AT,POS
frame< 234,345

Thank you for youre help...

OS:Redhat 9

myrmidon · 10-29-2007, 04:57 PM

Ok i managed to read the data from the hardware, to setup irq driven reads :

setting the serial parameters:

Quote:

int ret;

ret = request_irq(4, handler, SA_INTERRUPT, "serialport", handler);
if (ret){ printk ("##### error requesting irq 4: returned %d\n", ret); } enable_irq(4);

outb_p(0, SERPORT + 3);
outb_p(0x00, SERPORT + 2);
outb_p(0x0B, SERPORT + 4);

outb_p(0x00, SERPORT + 1); // Disable IER
outb_p(0x83, SERPORT + 3); // Switch to DLAB =1

outb_p(0x00, SERPORT + 1); // Set DLM divisor = 0 (9600)
outb_p(0x0C, SERPORT ); // Set DLL divisor = 6 (9600)

outb_p(0x03, SERPORT + 3);
// Switch to DLAB = 0, 8 data bits, one stop bit, no parity, no break

// Bit 0 Enable Received DATA Interrupt
outb_p(0x01, SERPORT + 1);

handle the irq :

Quote:

static int handler(void)
{
// do stuff
int tmp=0,c,x=0,y=0;

do
{
c=inb_p(SERPORT+5);
if(c&1)
{
tmp=inb_p(SERPORT);
k[i]=tmp;
i++;

}

}while(c&1);

if(tmp==';')
{

for(j=0;j<i;j++)
printk("%c",k[j]);

if(k[1]=='G')
{
x=k[2]-48;
if(k[3]!=',')
{
x*=10;
x+=k[3]-48;
y=k[5]-48;
if(k[6]!=';')
{
y*=10;
y+=k[6]-48;
}
}
else
{
y=k[4]-48;
if(k[5]!=';')
{
y*=10;
y+=k[5]-48;
}
}

}// 'G'

i=0;
printk("\n");
printk("X:%d Y:%d\n",x,y);
}

// read Line Status Register & Modem Status Register to ACK IRQ
//tmp = inb_p( SERPORT + 5);
//tmp = inb_p( SERPORT + 6);
return IRQ_HANDLED;
}

Now i have the koordinates in X and Y (integer values)in the KERNEL SPACE

The BIG QUESTION is :

HOW TO SEND THESE KOORDINATES TO X server or GPM ?????

Many Thanks ...