simple_S_watch.rar_watch

#include <p18f452.h> #include <delays.h> #include "P18F_LCD.h" // // Defines for I/O ports that provide LCD data & control // PORTD[0:3]-->DB[4:7]: Higher order 4 lines data bus with bidirectional // : DB7 can be used as a BUSY flag // PORTA,2 --> [E] : LCD operation start signal control // PORTD,5 --> [RW]: LCD Read/Write control // PORTD,4 --> [RS]: LCD Register Select control // : "0" for Instrunction register (Write), Busy Flag (Read) // : "1" for data register (Read/Write) // #define CPU_SPEED 16 // CPU speed is 16 Mhz !! #define LCD_RS PORTDbits.RD4 // The definition of control pins #define LCD_RW PORTDbits.RD5 #define LCD_E PORTAbits.RA2 #define LCD_DATA LATD // PORTD[0:3] as LCD DB[4:7] //#define LCD_CTRL LATA #define DIR_LCD_DATA TRISD // LCD Module commands #define DISP_2Line_8Bit 0b00111000 #define DISP_2Line_4Bit 0b00101000 #define DISP_ON 0x00C // Display on #define DISP_ON_C 0x00E // Display on, Cursor on #define DISP_ON_B 0x00F // Display on, Cursor on, Blink cursor #define DISP_OFF 0x008 // Display off #define CLR_DISP 0x001 // Clear the Display #define ENTRY_INC 0x006 // #define ENTRY_INC_S 0x007 // #define ENTRY_DEC 0x004 // #define ENTRY_DEC_S 0x005 // #define DD_RAM_ADDR 0x080 // Least Significant 7-bit are for address #define DD_RAM_UL 0x080 // Upper Left coner of the Display #pragma udata unsigned char Temp_CMD ; unsigned char Str_Temp ; unsigned char Out_Mask ; #pragma code void OpenLCD(void) { ADCON1=(ADCON1 & 0xF0)|0b00001110; // Set AN0 for analog input LCD_E=0; LCD_DATA = 0x00; // LCD DB[4:7] & RS & R/W --> Low DIR_LCD_DATA = 0x00; // LCD DB[4:7} & RS & R/W are output function TRISAbits.TRISA2=0; // Set E pin as output LCD_DATA = 0b00000011 ; LCD_CMD_W_Timing() ; LCD_L_Delay() ; LCD_DATA = 0b00000011 ; LCD_CMD_W_Timing() ; LCD_L_Delay() ; LCD_DATA = 0b00000011 ; LCD_CMD_W_Timing() ; LCD_L_Delay() ; LCD_DATA = 0b00000010 ; LCD_CMD_W_Timing() ; LCD_L_Delay() ; WriteCmdLCD(DISP_2Line_4Bit) ; LCD_S_Delay() ; WriteCmdLCD(DISP_ON) ; LCD_S_Delay() ; WriteCmdLCD(ENTRY_INC) ; LCD_S_Delay() ; WriteCmdLCD(CLR_DISP) ; LCD_L_Delay() ; } //********************************************* // _ ______________________________ // RS _>--<______________________________ // _____ // RW \_____________________________ // __________________ // E ____________/ \___ // _____________ ______ // DB _____________>--------------<______ //*********************************************** // Write Command to LCD module // void WriteCmdLCD( unsigned char LCD_CMD) { Temp_CMD = (LCD_CMD & 0xF0)>>4 ; // Send high nibble to LCD bus LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ; LCD_CMD_W_Timing () ; Temp_CMD = LCD_CMD & 0x0F ; // Send low nibble to LCD bus LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ; LCD_CMD_W_Timing () ; LCD_S_Delay() ; // Delay 100uS for execution } //*********************************************** // Write Data to LCD module // void WriteDataLCD( unsigned char LCD_CMD) { Temp_CMD = (LCD_CMD & 0xF0)>>4 ; // Send high nibble to LCD bus LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ; LCD_DAT_W_Timing () ; Temp_CMD = LCD_CMD & 0x0F ; // Send low nibble to LCD bus LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ; LCD_DAT_W_Timing () ; LCD_S_Delay() ; // Delay 100uS for execution } void putcLCD(unsigned char LCD_Char) { WriteDataLCD(LCD_Char) ; } void LCD_CMD_W_Timing( void ) { LCD_RS = 0 ; // Set for Command Input Nop(); // LCD_RW = 0 ; Nop(); LCD_E = 1 ; Nop(); Nop(); LCD_E = 0 ; } void LCD_DAT_W_Timing( void ) { LCD_RS = 1 ; // Set for Data Input Nop(); // LCD_RW = 0 ; Nop(); LCD_E = 1 ; Nop(); Nop(); LCD_E = 0 ; } //*********************************************** // Set Cursor position on LCD module // CurY = Line (0 or 1) // CurX = Position ( 0 to 15) // void LCD_Set_Cursor(unsigned char CurY, unsigned char CurX) { WriteCmdLCD( 0x80 + CurY * 0x40 + CurX) ; LCD_S_Delay() ; } void SetDDRamAddr (unsigned char DDRamAddr) { WriteCmdLCD(DDRamAddr); LCD_S_Delay(); } //*********************************************** // Put a ROM string to LCD Module // void putrsLCD( const rom char *Str ) { while (1) { Str_Temp = *Str ; if (Str_Temp != 0x00 ) { WriteDataLCD(Str_Temp) ; Str ++ ; } else return ; } } //*********************************************** // Put a RAM string to LCD Module // void putsLCD( char *Str) { while (1) { Str_Temp = *Str ; if (Str_Temp != 0x00 ) { WriteDataLCD(Str_Temp) ; Str ++ ; } else return ; } } void puthexLCD(unsigned char HEX_Val) { unsigned char Temp_HEX ; Temp_HEX = (HEX_Val >> 4) & 0x0f ; if ( Temp_HEX > 9 )Temp_HEX += 0x37 ; else Temp_HEX += 0x30 ; WriteDataLCD(Temp_HEX) ; Temp_HEX = HEX_Val & 0x0f ; if ( Temp_HEX > 9 )Temp_HEX += 0x37 ; else Temp_HEX += 0x30 ; WriteDataLCD(Temp_HEX) ; } // ********************************************************************************* // Delay for atleast 10 ms // ********************************************************************************* void LCD_L_Delay(void) { Delay10KTCYx(CPU_SPEED / 2) ; } // ********************************************************************************* // Delay for 100 us // ********************************************************************************* void LCD_S_Delay(void) { Delay100TCYx(CPU_SPEED) ; }