avradc.txt

实现AVR的AD转换

接线说明 
PB0-DB0```PB7-DB7 
PC1-RW 
PC2-CS1 
PC3-CS2 
PC4-E 
PC5-RS 
PC0-AD输入口 


//GCC M8 
#include<avr/io.h>  
#include<avr/pgmspace.h> 
#include<avr/delay.h> 
#include<avr/interrupt.h> 
#include<avr/signal.h> 
#define setbit(sfr,bit) (sfr|=(1<<bit))  
#define clrbit(sfr,bit) (sfr&=~(1<<bit))  
#define DATA PORTB 
#define RW 1 
#define DI 5 
#define CS1 2 
#define CS2 3 
#define E 4 
#define R PORTC 
const unsigned char ling[16]PROGMEM={0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00};/*"0",0*/ 
const unsigned char yi[16]PROGMEM={0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00}; 
const unsigned char er[16]PROGMEM={0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00};/*"2",0*/ 
const unsigned char san[16]PROGMEM={0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00};/*"3",0*/ 
const unsigned char si[16]PROGMEM={0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00};/*"4",0*/ 
const unsigned char wu[16]PROGMEM={0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00};/*"5",0*/ 
const unsigned char liu[16]PROGMEM={0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00};/*"6",0*/ 
const unsigned char qi[16]PROGMEM={0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00};/*"7",0*/ 
const unsigned char ba[16]PROGMEM={0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00};/*"8",0*/ 
const unsigned char jiu[16]PROGMEM={0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00};/*"9",0*/ 
const unsigned char zhuan[32]PROGMEM={ 
0x08,0xC8,0xB8,0x8F,0xE8,0x88,0x40,0x48, 
0xC8,0x7F,0x48,0x48,0x4C,0x68,0x40,0x00, 
0x08,0x18,0x08,0x04,0xFF,0x04,0x00,0x02, 
0x13,0x22,0x62,0x9A,0x06,0x02,0x00,0x00 
}; 
const unsigned char huan[32]PROGMEM={ 
0x10,0x10,0x10,0xFF,0x90,0x90,0xE8,0x24, 
0x27,0xF4,0x2C,0x24,0xF0,0x20,0x00,0x00, 
0x02,0x42,0x81,0x7F,0x84,0x84,0x47,0x24, 
0x14,0x0F,0x14,0x24,0x47,0xC4,0x44,0x00 
}; 
const unsigned char jie[32]PROGMEM={ 
0x00,0x30,0x28,0xA4,0x63,0x10,0x08,0x48, 
0x48,0x48,0x7F,0x48,0x48,0x4C,0x08,0x00, 
0x00,0x22,0x63,0x22,0x12,0x12,0x00,0xFE, 
0x42,0x42,0x42,0x42,0x42,0xFF,0x02,0x00 
}; 
const unsigned char guo[32]PROGMEM={ 
0x00,0x00,0x00,0xFE,0x92,0x92,0x92,0xFE, 
0x92,0x92,0x92,0xFF,0x02,0x00,0x00,0x00, 
0x02,0x42,0x42,0x22,0x12,0x0A,0x06,0xFF, 
0x06,0x0A,0x12,0x22,0x62,0x23,0x02,0x00 
}; 
const prog_uchar *sr; 
volatile unsigned int Result=0; 
unsigned char DispBuf[4]; 
//初始化IO口 
void Init_IO(void) 
{ 
        DDRC|=0xfe; 
        PORTC=0xff; 
        DDRD=0xff; 
        PORTD=0xff; 
        DDRB=0xff; 
        PORTB=0xff; 
} 
//初始化ADC 
void Init_AD(void) 
{ 
        ADMUX|=(1<<REFS1)|(1<<REFS0); 
        ADCSRA|=(1<<ADIE); 
} 
//ADC中断服务程序 
SIGNAL(SIG_ADC) 
{ 
        Result=ADCL; 
        Result|=(unsigned int)(ADCH<<8); 
} 
//检查LCD是否空闲 
unsigned char getstate(void) 
{ 
    PORTB=0xff;  
    DDRB=0x00; 
        clrbit(R,CS1); 
        clrbit(R,CS2); 
    clrbit(R,DI); 
        setbit(R,RW); 
        setbit(R,E); 
        clrbit(R,E); 
        return PINB; 
} 
unsigned char lcdbusy(void) 
{ 
        unsigned char state=0; 
        state=getstate(); 
        if(state&0x80) 
                return 1; 
        else 
            return 0; 
} 
//写命令 
void lcdcommand(unsigned char command) 
{ 
        DDRB=0xff; 
        clrbit(R,CS1); 
        clrbit(R,CS2); 
        clrbit(R,RW); 
        clrbit(R,DI); 
    DATA=command; 
        setbit(R,E); 
        clrbit(R,E); 
} 
//开lcd 
void lcdopen(void) 
{         
        while(lcdbusy()); 
        lcdcommand(0x3f); 
} 
//设置开始行 
void lcdsetline(unsigned char line) 
{ 
        line|=0xc0; 
        while(lcdbusy()); 
        lcdcommand(line); 
} 
//设置开始页 
void lcdsetpage(unsigned char page) 
{ 
        page&=0xbf; 
        page|=0xb8; 
        while(lcdbusy()); 
        lcdcommand(page); 
} 
//设置列地址 
void lcdsetrow(unsigned char row) 
{ 
        row&=0x7f; 
    row|=0x40; 
        while(lcdbusy()); 
        lcdcommand(row); 
} 
//写数据 
void lcdwrite(unsigned char data,unsigned char cs) 
{ 
        while(lcdbusy()); 
    DDRB=0xff; 
        if(cs==1) 
        { 
                clrbit(R,CS1); 
                setbit(R,CS2); 
        } 
        else 
        { 
                setbit(R,CS1); 
                clrbit(R,CS2); 
        } 
        clrbit(R,RW); 
        setbit(R,DI); 
        DATA=(data); 
        setbit(R,E); 
        clrbit(R,E); 
} 
//写一个数字 
void lcd_nu(unsigned char cs,unsigned char page,unsigned char row,unsigned char line) 
{             
        unsigned char i; 
        lcdsetline(line); 
        lcdsetpage(page); 
        lcdsetrow(row); 
        for(i=0;i<8;i++) 
        { 
                lcdwrite(pgm_read_byte(sr++),cs); 
        } 
        lcdsetline(line); 
        lcdsetpage(page+1); 
        lcdsetrow(row); 
        for(i=8;i<16;i++) 
        { 
                lcdwrite(pgm_read_byte(sr++),cs); 
        } 
} 
//写一个汉字 
void lcd_cn(const prog_uchar *src,unsigned char cs,unsigned char page,unsigned char row,unsigned char line) 
{ 
        unsigned char i; 
    lcdsetline(line); 
        lcdsetpage(page); 
        lcdsetrow(row); 
        for(i=0;i<16;i++) 
        { 
                lcdwrite(pgm_read_byte(src+i),cs); 
        } 
    lcdsetline(line); 
        lcdsetpage(page+1); 
        lcdsetrow(row); 
    for(i=16;i<32;i++) 
        { 
                lcdwrite(pgm_read_byte(src+i),cs); 
        } 
} 
//结果装入显示缓冲区及显示服务程序 
void Showlcd(void) 
{ 
    unsigned char r; 
        DispBuf[3]=Result%10; 
        DispBuf[2]=(Result%100)/10; 
        DispBuf[1]=(Result/100)%10; 
        DispBuf[0]=(Result/1000); 
        for(r=0;r<4;r++) 
        { 
            if(DispBuf[r]==0) 
                        sr=ling; 
                else if(DispBuf[r]==1) 
                        sr=yi; 
                else if(DispBuf[r]==2) 
                        sr=er; 
            else if(DispBuf[r]==3) 
                        sr=san; 
                else if(DispBuf[r]==4) 
                        sr=si; 
            else if(DispBuf[r]==5) 
                        sr=wu; 
                else if(DispBuf[r]==6) 
                        sr=liu; 
            else if(DispBuf[r]==7) 
                        sr=qi; 
                else if(DispBuf[r]==8) 
                        sr=ba; 
            else if(DispBuf[r]==9) 
                        sr=jiu; 
                else  
                        sr=ling; 
                lcd_nu(2,3,r*8,0); 
        } 
} 
         
//主程序 
int main(void) 
{ 
     
        Init_IO(); 
        Init_AD(); 
        lcdopen(); 
        ADCSRA|=(1<<ADEN); 
        sei(); 
        lcd_cn(zhuan,1,3,0,0); 
        lcd_cn(huan,1,3,16,0); 
        lcd_cn(jie,1,3,32,0); 
        lcd_cn(guo,1,3,48,0); 
        while(1) 
        { 
                ADCSRA|=(1<<ADSC); 
                Showlcd(); 
                _delay_loop_2(10000); 
        } 
}