3.22EjemploDRM007 Co..

Source Code
/*****************************************************************************\
* void init_LCD(void): Subroutine to initialize the LCD character display for *
* 4-bit operation, blink off, display on. *
* *
* Parameters: None. *
* *
* Return: None. *
\*****************************************************************************/
void InitLCD(void)
{
/* Sequence followed for LCD initialization */
// In 8 bit operation mode
WaitMs(15);
Ctrl8LCD(0x03); // Set 8 bit operation
WaitMs(5);
Ctrl8LCD(0x03); // Set 8 bit operation
WaitMs(1);
Ctrl8LCD(0x03); // Set 8 bit operation
Ctrl8LCD(0x02); // Set 4 bit operation
}
// In 4 bit operation mode
CtrlLCD(0x28); // 4 bit operation with 2 line display
CtrlLCD(0x06); // No display shift and move right
CtrlLCD(0x01); // Clear display and return home position
CtrlLCD(0x0C); // Display on, cursor off and blink off
return;
/*****************************************************************************\
* void ctrl_LCD(void): Subroutine for sending control bytes to the LCD. This
*
* routine send the 8 bit value in two parts, since this *
* function is called in 4 bit operation mode. *
* *
* Parameters: ctrl. An 8 bit value for different control of the LCD, such as *
* number of lines, blink on or off, etc. *
* *
* Return: None. *
\*****************************************************************************/
void CtrlLCD(UBYTE ctrl)
{
// Upper Nibble
PORTA &= 0xF0;
// puting pin states of the LCD in PORTA pins
PORTA |= (ctrl >> 4) & 0x0F;
Set_E();
Clear_E();
DRM007
BLDC Motor Control Board for Industrial and Appliance Applications
146 Source Code MOTOROLA