void OpenXLCD(unsigned char lcdtype)
{
// 4-bit mode
#ifdef UPPER // Upper 4-bits of the port
DATA_PORT &= 0x0f;
TRIS_DATA_PORT &= 0x0F;
#else // Lower 4-bits of the port
DATA_PORT &= 0xf0;
TRIS_DATA_PORT &= 0xF0;
#endif
TRIS_RW = 0; // All control signals made outputs
TRIS_RS = 0;
TRIS_E = 0;
RW_PIN = 0; // R/W pin made low
RS_PIN = 0; // Register select pin made low
E_PIN = 0; // Clock pin made low
// Delay for 15ms to allow for LCD Power on reset
DelayPORXLCD();
//-------------------reset procedure through software----------------------
WriteCmdXLCD(0x30);
Delay1KTCYx(33);
WriteCmdXLCD(0x30);
Delay1KTCYx(0x01);
WriteCmdXLCD(0x32);
while( BusyXLCD() );
//------------------------------------------------------------------------------------------
// Set data interface width, # lines, font
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(lcdtype); // Function set cmd
// Turn the display on then off
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(DOFF&CURSOR_OFF&BLINK_OFF); // Display OFF/Blink OFF
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(DON&CURSOR_ON&BLINK_ON); // Display ON/Blink ON
// Clear display
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(0x01); // Clear display
// Set entry mode inc, no shift
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(SHIFT_CUR_LEFT); // Entry Mode
// Set DD Ram address to 0
while(BusyXLCD()); // Wait if LCD busy
SetDDRamAddr(0x80); // Set Display data ram address to 0
return;
}
/*******************************************************************
Function Name: OpenXLCD
Description: This function configure the IO pins
and initializes the LCD controller
the lcdtype should contain data on the type
of interface and number of lines of display.
Input parameters: char lcdtype
Return value: none
********************************************************************/
void OpenXLCD(char lcdType)
{
/* Allow a delay for POR.(minimum of 15ms) */
DelayPORXLCD();
/*Initialize the data port/control pins to zero */
DATA_PIN_7 = 0;
DATA_PIN_6 = 0;
DATA_PIN_5 = 0;
DATA_PIN_4 = 0;
# ifdef EIGHT_BIT_INTERFACE
DATA_PIN_3 = 0;
DATA_PIN_2 = 0;
DATA_PIN_1 = 0;
DATA_PIN_0 = 0;
#endif
RW_PIN = 0;
RS_PIN = 0;
E_PIN = 0;
/* Configure the data pins as outputs */
TRIS_DATA_PIN_7 = 0;
TRIS_DATA_PIN_6 = 0;
TRIS_DATA_PIN_5 = 0;
TRIS_DATA_PIN_4 = 0;
#ifdef EIGHT_BIT_INTERFACE
TRIS_DATA_PIN_3 = 0;
TRIS_DATA_PIN_2 = 0;
TRIS_DATA_PIN_1 = 0;
TRIS_DATA_PIN_0 = 0;
#endif
/* Make all control pins as outputs */
TRIS_RW = 0;
TRIS_RS = 0;
TRIS_E = 0;
/* First Step - Function Set as specified by lcdType*/
WriteCmdXLCD(lcdType);
/* wait for command completion */
while(BusyXLCD());
/* Second Step - Display ON/OFF CONTROL*/
WriteCmdXLCD(DON & BLINK_OFF & CURSOR_ON);
/* wait for command completion */
while(BusyXLCD());
/* Third Step - LCD Clear */
WriteCmdXLCD(CLEAR_XLCD);
/* wait for command completion */
while(BusyXLCD());
/*Fourth Step - Entry Mode Set */
WriteCmdXLCD(ENTIRE_SHIFT_OFF & INCR_MODE);
/* wait for command completion */
while(BusyXLCD());
} /* end of function */
/********************************************************************
* Function Name: lcd_init() *
* Return Value: void *
* Parameters: void *
* Description: Basée sur le coontroleur d'afficheur Hitachi*
* HD44780 LCD, cette fonction initialise *
* l'écran LCD *
********************************************************************/
void lcd_init()
{
PORTD = 0; // tous les signaux à 0
TRISD = 0xF0; // signaux de contrôle en sortie et signaux de données en entrées
DelayPORXLCD(); // Delay for 15ms to allow for LCD Power on reset
// Setup interface to LCD
TRIS_DATA_PORT &= 0x0f; // Port données en écriture
DATA_PORT &= 0x0f; // Masque pour effacer le port de données
DATA_PORT |= 0b00110000; // Masque pour écrire 0011 (cmd) sur le port de données
E_PIN = 1; // Clock the cmd in - Validation de l'écriture de cmd
DelayxxTCY();
E_PIN = 0;
// Delay for at least 4.1ms
DelayXLCD();
// Setup interface to LCD
DATA_PORT &= 0x0f; // On recommence à écrire cmd
DATA_PORT |= 0b00110000; //
E_PIN = 1; // Clock the cmd in
DelayxxTCY();
E_PIN = 0;
// Delay for at least 100us
DelayXLCD();
// Setup interface to LCD
DATA_PORT &= 0x0f; // Function set cmd
DATA_PORT |= 0b00110000;
E_PIN = 1; // Clock cmd in
DelayxxTCY();
E_PIN = 0;
DelayXLCD();
// Setup interface to LCD
DATA_PORT &= 0x0f; // Function set cmd(4-bit interface)
DATA_PORT |= 0b00100000;
E_PIN = 1; // Clock cmd in
DelayxxTCY();
E_PIN = 0;
TRIS_DATA_PORT |= 0xf0; // Port de données en entrée
// Set data interface width, # lines, font
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(LCD_TYPE); // Function set cmd
// Turn the display on then off
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(DOFF&CURSOR_OFF&BLINK_OFF); // Display OFF/Blink OFF
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(DON&CURSOR_ON&BLINK_ON); // Display ON/Blink ON
// Clear display
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(0x01); // Clear display
// Set entry mode inc, no shift
while(BusyXLCD()); // Wait if LCD busy
WriteCmdXLCD(SHIFT_CUR_LEFT); // Entry Mode
// Set DD Ram address to 0
while(BusyXLCD()); // Wait if LCD busy
lcd_gotoyx(1,1); // Set Display data ram address to 0
return;
}
