demo_6_8.i

CVAVR完整程序

/*********************************************
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
*********************************************/
// CodeVisionAVR C Compiler
// (C) 1998-2001 Pavel Haiduc, HP InfoTech S.R.L.

// I/O registers definitions for the ATmega16


#pragma used+
#pragma used+
sfrb TWBR=0;
sfrb TWSR=1;
sfrb TWAR=2;
sfrb TWDR=3;
sfrb ADCL=4;
sfrb ADCH=5;
sfrw ADCW=4;      // 16 bit access
sfrb ADCSRA=6;
sfrb ADMUX=7;
sfrb ACSR=8;
sfrb UBRRL=9;
sfrb UCSRB=0xa;
sfrb UCSRA=0xb;
sfrb UDR=0xc;
sfrb SPCR=0xd;
sfrb SPSR=0xe;
sfrb SPDR=0xf;
sfrb PIND=0x10;
sfrb DDRD=0x11;
sfrb PORTD=0x12;
sfrb PINC=0x13;
sfrb DDRC=0x14;
sfrb PORTC=0x15;
sfrb PINB=0x16;
sfrb DDRB=0x17;
sfrb PORTB=0x18;
sfrb PINA=0x19;
sfrb DDRA=0x1a;
sfrb PORTA=0x1b;
sfrb EECR=0x1c;
sfrb EEDR=0x1d;
sfrb EEARL=0x1e;
sfrb EEARH=0x1f;
sfrw EEAR=0x1e;   // 16 bit access
sfrb UBRRH=0x20;
sfrb UCSRC=0X20;
sfrb WDTCR=0x21;
sfrb ASSR=0x22;
sfrb OCR2=0x23;
sfrb TCNT2=0x24;
sfrb TCCR2=0x25;
sfrb ICR1L=0x26;
sfrb ICR1H=0x27;
sfrb OCR1BL=0x28;
sfrb OCR1BH=0x29;
sfrw OCR1B=0x28;  // 16 bit access
sfrb OCR1AL=0x2a;
sfrb OCR1AH=0x2b;
sfrw OCR1A=0x2a;  // 16 bit access
sfrb TCNT1L=0x2c;
sfrb TCNT1H=0x2d;
sfrw TCNT1=0x2c;  // 16 bit access
sfrb TCCR1B=0x2e;
sfrb TCCR1A=0x2f;
sfrb SFIOR=0x30;
sfrb OSCCAL=0x31;
sfrb OCDR=0x31;
sfrb TCNT0=0x32;
sfrb TCCR0=0x33;
sfrb MCUCSR=0x34;
sfrb MCUCR=0x35;
sfrb TWCR=0x36;
sfrb SPMCR=0x37;
sfrb TIFR=0x38;
sfrb TIMSK=0x39;
sfrb GIFR=0x3a;
sfrb GICR=0x3b;
sfrb OCR0=0X3c;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-

// Interrupt vectors definitions


// Needed by the power management functions (sleep.h)
#asm
	#ifndef __SLEEP_DEFINED__
	#define __SLEEP_DEFINED__
	.EQU __se_bit=0x40
	.EQU __sm_mask=0xB0
	.EQU __sm_powerdown=0x20
	.EQU __sm_powersave=0x30
	.EQU __sm_standby=0xA0
	.EQU __sm_ext_standby=0xB0
	.EQU __sm_adc_noise_red=0x10
	.SET power_ctrl_reg=mcucr
	#endif
#endasm


// CodeVisionAVR C Compiler
// (C) 1998-2000 Pavel Haiduc, HP InfoTech S.R.L.


#pragma used+
#pragma used+

void delay_us(unsigned int n);
void delay_ms(unsigned int n);

#pragma used-


#asm
.equ __lcd_port=0x1B 	; PORTA数据寄存器地址    //lcd由A口控制
#endasm
/*  [LCD]     
    1 GND- 9  GND
    2 +5V- 10 VCC  
    3 VLC- LCD HEADER Vo
    4 RS - 1  PA0 (M16)
    5 RD - 2  PA1 (M16)
    6 EN - 3  PA2 (M16)
   11 D4 - 5  PA4 (M16)
   12 D5 - 6  PA5 (M16)
   13 D6 - 7  PA6 (M16)
   14 D7 - 8  PA7 (M16) */
/* LCD driver routines

  CodeVisionAVR C Compiler
  (C) 1998-2003 Pavel Haiduc, HP InfoTech S.R.L.

  BEFORE #include -ING THIS FILE YOU
  MUST DECLARE THE I/O ADDRESS OF THE
  DATA REGISTER OF THE PORT AT WHICH
  THE LCD IS CONNECTED!

  EXAMPLE FOR PORTB:

    #asm
        .equ __lcd_port=0x18
    #endasm
    #include <lcd.h>

*/


#pragma used+
#pragma used+

void _lcd_ready(void);
void _lcd_write_data(unsigned char data);
// write a byte to the LCD character generator or display RAM
void lcd_write_byte(unsigned char addr, unsigned char data);
// read a byte from the LCD character generator or display RAM
unsigned char lcd_read_byte(unsigned char addr);
// set the LCD display position  x=0..39 y=0..3
void lcd_gotoxy(unsigned char x, unsigned char y);
// clear the LCD
void lcd_clear(void);
void lcd_putchar(char c);
// write the string str located in SRAM to the LCD
void lcd_puts(char *str);
// write the string str located in FLASH to the LCD
void lcd_putsf(char flash *str);
// initialize the LCD controller
unsigned char lcd_init(unsigned char lcd_columns);

#pragma used-
#pragma library lcd.lib


flash unsigned char dis_str[]=               //字符串数组dis_str
            "Hello WangHui! This is a LCD display demo.";
void main(void)
{
	unsigned char flash *str;          
	str = dis_str;      //指针str指向dis_str的第一个字母（H）
	lcd_init(16);		//初始化LCD为2×16的液晶屏
	
	lcd_clear();					// 清空LCD
	lcd_gotoxy(4,0);                //光标定位到第一行第五列
	lcd_putchar('a');               //在第一行第五列输出字符a
	delay_ms(1000);                 //延时1秒
	while(1)
	{
		lcd_clear();					//清空LCD
		lcd_putsf("HoHai University");	//从第一行第一列开始输出字符串(HoHai University)
        lcd_gotoxy(0,1);				//光标定位到第二行第一列
		lcd_putsf(str);				// 显示字符串，并随while循环左移
		if (*str++ == 0) str = dis_str;  //判断字符串是否结束，结束则从头开始
    	        delay_ms(1000);         //延时1秒
    }	
}