pıc c lcd

******************************************************************
* Function Name: WriteDataXLCD *
* Return Value: void *
* Parameters: data: data byte to be written to LCD *
* Description: This routine writes a data byte to the *
* Hitachi HD44780 LCD controller. The user *
* must check to see if the LCD controller is *
* busy before calling this routine. The data *
* is written to the character generator RAM or*
* the display data RAM depending on what the *
* previous SetxxRamAddr routine was called. *
********************************************************************/
void WriteDataXLCD(unsigned char bValue)
{

unsigned char bTemp;
bTemp = bValue;

// Wait 1milsec for not busy
Wait(BUSY_DELAY);

// clear RS for Instruction
RS_PIN = 1;

// write ms nibble to port
LATD = (LATD & 0xFFF0) | (bTemp >> 4 & 0x000F);

// make PORTD output
TRISD = TRISD & 0xFFF0;

// clear R/!W for write
RW_PIN = 0;

// toggle enable for > 1 usec
E_PIN = 1;
Wait(20);
E_PIN = 0;

Wait(20);

// write ls nibble to port
LATD = (LATD & 0xFFF0) | (bValue & 0x000F);

// clear R/!W for write
RW_PIN = 0;


// toggle enable for > 1 usec
E_PIN = 1;
Wait(20);
E_PIN = 0;

//make PORTD input;
TRISD = TRISD | 0x000F;

return;

}

void Wait(unsigned int count)
{
while(count--);
}

arkadslr ben burda lcdyebldc motorda hız kontoluü yapıyorum hangi hızda oldugunu lcd de nasıl görebilirim nasıl bir komut ekleyeblrlm