demo_6_8.c~

AVR单片机嵌入式系统原理与应用实践例码

/*********************************************
File name           : demo_6_8.c
Chip type           : ATmega16
Program type        : Application
Clock frequency     : 4.000000 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 256
*********************************************/
#include <mega16.h>
#include <delay.h>

#asm
.equ __lcd_port=0x15 	; PORTC数据寄存器地址
#endasm
/*  [LCD]     
    1 GND- 9  GND
    2 +5V- 10 VCC  
    3 VLC- LCD HEADER Vo
    4 RS - 1  PC0 (M16)
    5 RD - 2  PC1 (M16)
    6 EN - 3  PC2 (M16)
   11 D4 - 5  PC4 (M16)
   12 D5 - 6  PC5 (M16)
   13 D6 - 7  PC6 (M16)
   14 D7 - 8  PC7 (M16) */
#include <lcd.h>
flash char dis_str[]="Hello World! This is a LCD display demo.";
void main(void)
{
	char flash *str;
	str = dis_str;
	lcd_init(16);				// initialize the LCD for 2 lines & 16 columns
	while(1)
	{
		lcd_clear();					// clere the LCD
		lcd_putsf("It's demo_6_8.c");	// display the message
    	lcd_gotoxy(0,1);				// go on the second LCD line
		lcd_putsf(str);				// display the message
		if (*str++ == 0) str = dis_str;
    	delay_ms(500);
    }	
}