Atmega128的ADC转换实现不了，请帮个忙，看看有什么问题

zhegongda · 发表于 2010-8-23 09:23:28

这是在Atmega128上，用ICCAVR做ADC转换的程序。发现ADC不转换，数码管上显示的永远是0514，不知道哪里出错了，望各位帮忙看看错在哪里，其他地方应该没有错，估计就在ADC初始化adc_init()、ADC转换adc_zhuanhuan()两个程序里面错，或者在main()函数出错，显示的程序display_adc()肯定没错的，因为在其他地方用过的

//A、D口都是用来数码管显示的
#include<iom128v.h>
#include<macros.h>
#include<stdio.h>
#include<delay.h>

#define  Data_IO    PORTA
#define  Data_DDR DDRA
#define  D_LE0    PORTD&=~(1<<PD4)
#define  D_LE1    PORTD|=(1<<PD4)
#define  W_LE0    PORTD&=~(1<<PD5)
#define  W_LE1    PORTD|=(1<<PD5)
#define  uchar    unsigned char
#define  uint       unsigned int

uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
uchar A1,A2,A3,A4;

void system_init()          //系统初始化
{
  DDRA=0xff;
  PORTA=0xff;
  DDRB=0xff;
  PORTB=0xff;             //关闭LED灯
  DDRD=0xff;
  PORTD=0xff;
}

void adc_init()             //ADC初始化
{
  ADCSRA=0x00;             //关ADC
  ADMUX=0xc0;                //2.56V基准电压，右对齐
  ACSR=0x80;
  ADCSRA=0x86;             //转换使能，64分频,单次转换
}

uint adc_zhuanhuan()       //ADC转换开始
{
  uint adc_value;
  ADMUX=0xc0;
  ADCSRA|=(1<<ADSC);       //启动转换
  delay_nms(3);
  while(!(ADCSRA&(1<<ADIF)));
  ADCSRA|=(1<<ADIF);
  adc_value=ADCL;
  adc_value+=ADCH*256;
  return adc_value;
}

void data_do(uint adc_value)
{
  A1=adc_value/1000;
  A2=adc_value%1000/100;
  A3=adc_value%1000%100/10;
  A4=adc_value%1000%100%10;
}

void display_adc()
{
  uchar i,j;
  system_init();
  j=0x01;
  for(i=0;i<4;i++)
  {
D_LE1;
W_LE1;
Data_IO=~j;
W_LE0;
j=(j<<1);
Data_IO=0x00;
D_LE0;
delay_nms(1);
  }
  D_LE1;
  W_LE1;
  Data_IO=~j;
  W_LE0;
  j=(j<<1);
  Data_IO=table[A1];
  D_LE0;
  delay_nms(1);
  D_LE1;
  W_LE1;
  Data_IO=~j;
  W_LE0;
  j=(j<<1);
  Data_IO=table[A2];
  D_LE0;
  delay_nms(1);
  D_LE1;
  W_LE1;
  Data_IO=~j;
  W_LE0;
  j=(j<<1);
  Data_IO=table[A3];
  D_LE0;
  delay_nms(1);
  D_LE1;
  W_LE1;
  Data_IO=~j;
  W_LE0;
  j=(j<<1);
  Data_IO=table[A4];
  D_LE0;
  delay_nms(1);
}

void main()
{
  uint adc_value;
  system_init();
  adc_init();
  SREG=0x80;
  while(1)
  {
adc_zhuanhuan();
data_do(adc_value);
display_adc();
  }
}

zhegongda · 发表于 2010-8-23 16:25:53

自己顶！

xxsc118 · 发表于 2010-8-24 11:35:04

这是我自己编的，经过试验是好用的。功能为：温度表。你参考一下。
#include<iom128v.h>
#include"1602.h"
#define uchar unsigned char
#define uint unsigned int
uchar tem[]={"tempreture:"};
#pragma data:code
const uchar table_ad[]={
/*0  ,1  ,2  ,3  ,4  ,5  ,6  ,7  ,8  ,9  ,10 ,11 ,12 ,13 ,14 ,15 ,16 ,17 ,18 ,19 */
      //0  ,0  ,0  ,
      0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,

      /*20 ,21 ,22 ,23 ,24 ,25 ,26 ,27 ,28 ,29 ,30 ,31 ,32 ,33 ,34 ,35 ,36 ,37 ,38 ,39 */
   0  ,0  ,0  ,0  ,0  ,0  ,0  ,0  ,1  ,2  ,4  ,6  ,7  ,8  ,9  ,10 ,12 ,14 ,15 ,16 ,

      /*40 ,41 ,42 ,43 ,44 ,45 ,46 ,47 ,48 ,49 ,50 ,51 ,52 ,53 ,54 ,55 ,56 ,57 ,58 ,59 */
      17 ,18 ,20 ,21 ,22 ,24 ,25 ,26 ,27 ,28 ,29 ,30 ,31 ,32 ,33 ,34 ,35 ,36 ,37 ,38 ,

      /*60 ,61 ,62 ,63 ,64 ,65 ,66 ,67 ,68 ,69 ,70 ,71 ,72 ,73 ,74 ,75 ,76 ,77 ,78 ,79 */
      39 ,40 ,41 ,42 ,43 ,44 ,45 ,46 ,47 ,48 ,49 ,50 ,51 ,51 ,52 ,53 ,54 ,55 ,56 ,57 ,

      /*80 ,81 ,82 ,83 ,84 ,85 ,86 ,87 ,88 ,89 ,90 ,91 ,92 ,93 ,94 ,95 ,96 ,97 ,98 ,99 */
      58 ,59 ,59 ,60 ,61 ,62 ,63 ,63 ,64 ,65 ,66 ,67 ,68 ,69 ,69 ,70 ,71 ,72 ,73 ,73 ,

      /*100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119*/
      74 ,75 ,76 ,77 ,77 ,78 ,79 ,80 ,81 ,82 ,83 ,83 ,84 ,85 ,86 ,87 ,87 ,88 ,89 ,90 ,

      /*120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139*/
      91 ,91 ,92 ,93 ,94 ,95 ,95 ,96 ,97 ,98 ,99 ,100,101,101,102,103,104,105,106,107,

      /*140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159*/
      107,108,109,110,111,112,113,114,115,115,116,117,118,119,120,121,122,123,124,125,

      /*160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179*/
      126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,

      /*180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199*/
      146,148,149,150,151,153,154,155,157,158,159,160,161,163,164,165,167,168,170,171,

      /*200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219*/
      173,175,176,177,179,181,183,185,186,187,189,191,193,195,197,199,200,201,202,204

};

//ADC测试,使用1602显示ADC0和ADC1的值
//主函数
main()
{
uchar ten_1,ten_2,ten_3,ten_4,i,temp;
uint adc_data0,adc_l0,adc_h0,adc_data1,adc_l1,adc_h1;

//初始化端口
DDRA=0xff;
DDRC=0XFF;
PORTC=0XFF;
PORTA=0x00;
DDRB=0xff;
DDRD=0xff;
PORTD=0x00;
DDRF=0x00;
PORTF=0x00;
DDRG=0xff;
PORTG=0x00;

//1602初始化
LcdInit();
WriteChar(1,2,11,tem);

PORTC|=(1<<6);
while(1)
   {
   //取ADC_0
   ADCSRA=0x00;
   ADMUX=0x40;
   ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADFR)|0x07; //128分频，连续转换
   s_ms(500);                                  //延时很重要，给出转换的时间
   adc_l0=ADCL;
   adc_h0=ADCH;
   adc_data0=adc_h0<<8|adc_l0;
   adc_data0=adc_data0>>2;             //放弃2位精度
   //adc_data0=adc_h0;
   temp=(table_ad[adc_data0]-40)/2;//温度计算

   //显示ADC0
   ten_3=(temp)/100;
   ten_2=(temp-(ten_3*100))/10;
   ten_1=temp-(ten_3*100)-ten_2*10;
   ten_1+=0x30;//转换成ASCII
   ten_2+=0x30;;//转换成ASCII
   ten_3+=0x30;;//转换成ASCII
   WriteNum(1,13,(ten_3));
   WriteNum(1,14,(ten_2));
   WriteNum(1,15,(ten_1));


   for(i=0;i<18;i++)
      {
      s_ms(60000);
      }
   }
}

#define uchar unsigned char
#define uint unsigned int

#define RS 0
#define RW 1
#define EN 2

void s_ms(uint ms)
{
for(;ms>1;ms--);
}

//查忙
void busy(void)
{
uchar temp;
s_ms(500);
PORTC&=~(1<<RS); //RS=0
s_ms(500);
PORTC|=(1<<RW);    //RW=1
s_ms(500);
while(temp)
{
PORTC|=(1<<EN); //EN=1
s_ms(500);
DDRA=0x00;    //A口变输入
PORTA=0xff;    //上拉使能
s_ms(500);
temp = PINA&0x80; //读取A口
s_ms(500);
DDRA=0xff;
PORTA=0xff;       //A口变输出
s_ms(500);
PORTC&=~(1<<EN); //EN=0
s_ms(500);
}
}

//写指令
void writecom(uchar com)
{
busy();
s_ms(500);
PORTC&=~(1<<RS); //RS=0
s_ms(500);
PORTC&=~(1<<RW); //RW=0
s_ms(500);
PORTC|=(1<<EN); //EN=1
s_ms(500);
PORTA = com;    //输出指令
s_ms(500);
PORTC&=~(1<<EN); //EN=0
s_ms(500);
}

//1602初始化
void LcdInit(void)
{
writecom(0x38);
s_ms(1000);
writecom(0x01);
s_ms(10000);
s_ms(1000);
s_ms(1000);
s_ms(1000);
s_ms(1000);
s_ms(1000);
s_ms(1000);
writecom(0x02);
s_ms(1000);
writecom(0x06);
s_ms(1000);
writecom(0x0c);
s_ms(1000);
writecom(0x38);
s_ms(1000);
}

//写数据
void writedata(uchar data)
{
busy();
s_ms(500);
PORTC|=(1<<RS); //RS=1
s_ms(500);
PORTC&=~(1<<RW); //RW=0
s_ms(500);
PORTC|=(1<<EN); //EN=1
s_ms(500);
PORTA = data;    //输出数据
s_ms(500);
PORTC&=~(1<<EN); //EN=0
s_ms(500);
}

//读数据
uchar readdata(void)
{
uchar temp;
busy();
s_ms(500);
PORTC|=(1<<RS);  //RS=1
s_ms(500);
PORTC|=(1<<RW);  //RW=1
s_ms(500);
PORTC|=(1<<EN);  //EN=1
s_ms(500);
DDRA=0x00;    //A端口变输入
s_ms(500);
temp = PINA;    //读A端口
s_ms(500);
DDRA=0xff;    //A端口变输出
s_ms(500);
PORTC&=~(1<<EN); //EN=0
s_ms(500);
return temp;
}

//=================================================
// 描述：写LCD内部CGRAM函数
// 入口： ‘num’要写的数据个数
//       ‘pbuffer’要写的数据的首地址
// 出口：无
//================================================
void WriteCGRAM(uint num, const uint *pBuffer)
{
uint i,t;
writecom(0x40);
PORTC|=(1<<RS);
PORTC&=~(1<<RW);
for(i=num;i!=0;i--)
{
t = *pBuffer;
PORTC|=(1<<EN);
PORTA = t;
PORTC&=~(1<<EN);
pBuffer++;
}

}

//=================================================
//描述：写菜单函数，本程序使用的LCD规格为 16 * 2
//入口：菜单数组首地址
//出口：无
//=================================================
void WriteMenu(const uchar *pBuffer)
{
uchar i,t;
writecom(0x80); //数据地址

PORTC|=(1<<RS);
PORTC&=~(1<<RW);
s_ms(50);
for(i=0;i<16;i++)
{
t = *pBuffer;
PORTA = t;
PORTC|=(1<<EN);
s_ms(50);
PORTC&=~(1<<EN);
pBuffer++;
}
writecom(0xC0);

PORTC|=(1<<RS);
PORTC&=~(1<<RW);
s_ms(50);
for(i=0;i<16;i++)
{
t = *pBuffer;
PORTA = t;
PORTC|=(1<<EN);
s_ms(50);
PORTC&=~(1<<EN);
pBuffer++;
}
}
//====================================================
// 描述：在任意位置写数字函数
// 入口：’row‘表示要写数字所在的行地址，只能为1或2
//    ’col‘表示要写数字所在的列地址，只能为0--15
//    ‘num’表示要写的数字，只能为0--9
// 出口：无
//===================================================
void WriteNum(uchar row,uchar col,uchar num)
{
if (row == 1) row = 0x80 + col;
else row = 0xC0 + col;
writecom(row);

PORTC|=(1<<RS);
s_ms(500);
PORTC&=~(1<<RW);
s_ms(500);
PORTA = num;
s_ms(500);
PORTC|=(1<<EN);
s_ms(500);
PORTC&=~(1<<EN);
s_ms(500);
}
//================================================================
// 描述：在任意位置写任意多个字符
// 入口：’row‘要写的字符所在的行，只能为1或2；
//    ‘col’要写的字符所在的列，只能为0---15
//    ‘num’要写字符的个数
//    ‘pbuffer’要写字符的首地址
//==================================================================
void WriteChar(uchar row,uchar col,uint num,uchar *pBuffer)
{
uchar i,t;
if (row == 1) row = 0x80 + col;
else row = 0xC0 + col;
writecom(row);

PORTC|=(1<<RS);
s_ms(500);
PORTC&=~(1<<RW);
s_ms(500);
for(i=num;i!=0;i--)
{
t = *pBuffer;
s_ms(500);
PORTA = t;
s_ms(500);
PORTC|=(1<<EN);
s_ms(500);
PORTC&=~(1<<EN);
s_ms(500);
pBuffer++;
}

}

lkwslk1 · 发表于 2013-2-22 12:56:55

m

jz701209李 · 发表于 2013-2-23 21:26:55

路过,学习一下....

Atmega128的ADC转换实现不了，请帮个忙，看看有什么问题

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