lcd._c

来自「ICCAVR Rainguage counter program」· _C 代码 · 共 59 行

//LCD DISPLAY
#include "lcd.h"

void LCD_Delay (unsigned long int d) 
{ 
    unsigned long int n; 
    for (n = 0; n < d; n++); 
} 

void LCD_IO_INIT (void) 
{ 
    DataDDR = 0xFF; // Selected PORT is the LCD DATA LINES 
    DataPort = 0x00; 
    CtrlDDR |= 0x07; // the LCD CONTROL LINES 
    CtrlPort |= 0x05; // LCD_RS = HIGH, LCD_RW = LOW, LCD_E = HIGH,
    LCD_Delay (500); // Wait for the up LCD to power up          
} 

void LCD_INIT (void) 
{ 
    LCD_PutCmd (PWR_CMD); // Power up the display 
    LCD_PutCmd (DL_CMD);  // Set to 4 lines, 8 bit, no cursor 
    LCD_PutCmd (CLR_DSP); // Clear the display 
    LCD_Delay (500); // Wait for the LCD to boot up
	
	LCD_PutCmd(LINE1);
	LCD_PutString("System Starting"); //init message displayed on line 1

} 
  
void LCD_PutCmd (char c) 
{ 
  CtrlPort &= ~(1<<LCD_RS); 
  LCD_Delay (5); // Wait for the proper setup time to respond to the RS control line  
  LCD_PutChar(c); 
  LCD_Delay (5); // Wait for the proper setup time to respond to the command being applied 
  CtrlPort |= (1<<LCD_RS); 
} 

void LCD_PutChar (char c) 
{ 
    CtrlPort |= (1<<LCD_E); 
    LCD_Delay (5); // Wait for the proper setup time to respond to the E pulse    
    PORTA = c; 
    LCD_Delay (5); // Wait for the proper setup time to respond to the character being applied 
    CtrlPort &= ~(1<<LCD_E); 
} 
  
void LCD_PutString (unsigned char *p) 
{ 

    // Keep sending data until the p pointer is end. 
        while(*p) {
		 LCD_PutChar(*p);
		 p++;
		 }

}