»論壇 › 嵌入式/單片機(jī)論壇 › 24小時(shí)必答區(qū) › 51 STC系列單片機(jī)可以接74HC595同時(shí)，再接MAX1241嗎？

51 STC系列單片機(jī)可以接74HC595同時(shí)，再接MAX1241嗎？

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發(fā)布時(shí)間: 2016-6-17 12:56

正文摘要:

我現(xiàn)在用一款STC12系列單片機(jī)，用74HC595作多位數(shù)碼管的段碼與位碼控制，然后用MAX1241 高精度ADC轉(zhuǎn)換芯片作重力傳感器數(shù)據(jù)采樣處理。但時(shí)我發(fā)現(xiàn)當(dāng)MAX1241芯片的ADC轉(zhuǎn)換程序啟動(dòng)后，595就不能顯示。關(guān)閉ADC轉(zhuǎn)換，給 ...

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ID:109622 發(fā)表于 2017-5-26 21:10

樓主，我也正在搞MAX1241 AD轉(zhuǎn)換，能給我發(fā)一份你的例程嗎？感激不盡！751191958@qq.com

ID:153199 發(fā)表于 2017-1-8 18:02

沒(méi)問(wèn)題。

ID:127087 發(fā)表于 2016-6-20 10:04

u16 Disp_tg(u16 num1)    //顯示體重
{
  u16 dis_buf1[3];
  if(num1>=0&&num1<10)
  {
      //dis_buf[3]=LEDMAP[(num1/1000)%10];
      dis_buf1[2]=LEDMAP[(num1/100)%10];
      dis_buf1[1]=LEDMAP[(num1/10)%10];
      dis_buf1[0]=LEDMAP[num1%10];

   send_595_U3(dis_buf1[0]);  //顯示個(gè)位段碼
   send_595_U7(0xbf);       //開(kāi)通個(gè)位的位碼
   delay(110);
   send_595_U7(0xff);       //關(guān)閉個(gè)位消隱
}
  else if(num1>=10&&num1<=99)
{
            //dis_buf[3]=LEDMAP[(num1/1000)%10];
   dis_buf1[2]=LEDMAP[(num1/100)%10];
      dis_buf1[1]=LEDMAP[(num1/10)%10];
   dis_buf1[0]=LEDMAP[num1%10];

      send_595_U3(dis_buf1[0]); //顯示個(gè)位段碼
      send_595_U7(0xbf);    //開(kāi)通個(gè)位的位碼
      delay(110);
   send_595_U7(0xff); //關(guān)閉個(gè)位消隱

   send_595_U3(dis_buf1[1]);  //顯示十位段碼
   send_595_U7(0xdf);       //開(kāi)十位通的位碼
   delay(110);
   send_595_U7(0xff);    //關(guān)閉十位消隱
}
  else if(num1>=100&&num1<=999)
{
//dis_buf[3]=LEDMAP[(num1/1000)%10];
dis_buf1[2]=LEDMAP[(num1/100)%10];
dis_buf1[1]=LEDMAP[(num1/10)%10];
dis_buf1[0]=LEDMAP[num1%10];

send_595_U3(dis_buf1[0]);    //顯示個(gè)位段碼
send_595_U7(0xbf);          //開(kāi)通個(gè)位的位碼
delay(110);
send_595_U7(0xff);    //關(guān)閉個(gè)位消隱

send_595_U3(dis_buf1[1]&0x7f); //顯示十位段碼
send_595_U7(0xdf);       //開(kāi)通十位的位碼
delay(110);
send_595_U7(0xff);    //關(guān)閉十位消隱
send_595_U3(dis_buf1[2]); //顯示百位段碼
send_595_U7(0xef);       //開(kāi)通百位的位碼
delay(110);
send_595_U7(0xff);    //關(guān)閉百位消隱
}
return num1;
}

u16 ReadADC_data() //讀取MAX1241 重力轉(zhuǎn)換數(shù)據(jù)
{
u16 ADC_Data;
u8 i;
SCLK=0;
CS=0;
ADC_Data=0;
while(!DOUT);
SCLK=1;
SCLK=0;
for(i=0;i<12;i++)
{
  SCLK=1;
  ADC_Data<<=1;
  ADC_Data|=DOUT;
  SCLK=0;
}
CS=1;
SCLK=0;
return  ADC_Data;

}

在主程序我調(diào)用單個(gè) 顯示程序沒(méi)有任何問(wèn)題，比如我想顯示59.8。：Disp_tg(598) ; 即可立馬顯示正常，但當(dāng)我再調(diào)用1241轉(zhuǎn)換數(shù)據(jù)：
Disp_tg(ReadADC_data()) ;  這時(shí)數(shù)碼管無(wú)顯示，問(wèn)題出在哪兒？請(qǐng)大家看看，哪里有問(wèn)題？

ID:127087 發(fā)表于 2016-6-20 09:51

liuyimao485812 發(fā)表于 2016-6-19 17:57
應(yīng)該是軟件問(wèn)題。

void send_595_U3(u8 Data2) //u3 控制段
{
u8 j;
RCK2 = 0;
delay(10);
SCK2 = 0;
for(j=0;j<=7;j++)
{
  SCK2 = 0;
  if(((0x80>>j)&Data2)==0)
SER2 = 0;
  else
SER2 = 1;
  SCK2 = 1;
}
RCK2 = 1;
}

void send_595_U7(u8 Data4)  //U7控制位
{
u8 M;
RCK4 = 0;
delay(10);
SCK4 = 0;
for(M=0;M<=7;M++)
{
  SCK4 = 0;
  if(((0x80>>M)&Data4)==0)
SER4 = 0;
  else
SER4 = 1;
  SCK4 = 1;
}
RCK4 = 1;
}

u16 Disp_tg(u16 num1)    //顯示體重
{
  u16 dis_buf1[3];
  if(num1>=0&&num1<10)
  {
      //dis_buf[3]=LEDMAP[(num1/1000)%10];
      dis_buf1[2]=LEDMAP[(num1/100)%10];
      dis_buf1[1]=LEDMAP[(num1/10)%10];
      dis_buf1[0]=LEDMAP[num1%10];

   send_595_U3(dis_buf1[0]);  //顯示個(gè)位段碼
   send_595_U7(0xbf);       //開(kāi)通個(gè)位的位碼
   delay(110);
   send_595_U7(0xff);       //關(guān)閉個(gè)位消隱
}
  else if(num1>=10&&num1<=99)
{
            //dis_buf[3]=LEDMAP[(num1/1000)%10];
   dis_buf1[2]=LEDMAP[(num1/100)%10];
      dis_buf1[1]=LEDMAP[(num1/10)%10];
   dis_buf1[0]=LEDMAP[num1%10];

      send_595_U3(dis_buf1[0]); //顯示個(gè)位段碼
      send_595_U7(0xbf);    //開(kāi)通個(gè)位的位碼
      delay(110);
   send_595_U7(0xff); //關(guān)閉個(gè)位消隱

   send_595_U3(dis_buf1[1]);  //顯示十位段碼
   send_595_U7(0xdf);       //開(kāi)十位通的位碼
   delay(110);
   send_595_U7(0xff);    //關(guān)閉十位消隱
}
  else if(num1>=100&&num1<=999)
{
//dis_buf[3]=LEDMAP[(num1/1000)%10];
dis_buf1[2]=LEDMAP[(num1/100)%10];
dis_buf1[1]=LEDMAP[(num1/10)%10];
dis_buf1[0]=LEDMAP[num1%10];

send_595_U3(dis_buf1[0]);    //顯示個(gè)位段碼
send_595_U7(0xbf);          //開(kāi)通個(gè)位的位碼
delay(110);
send_595_U7(0xff);    //關(guān)閉個(gè)位消隱

send_595_U3(dis_buf1[1]&0x7f); //顯示十位段碼
send_595_U7(0xdf);       //開(kāi)通十位的位碼
delay(110);
send_595_U7(0xff);    //關(guān)閉十位消隱
send_595_U3(dis_buf1[2]); //顯示百位段碼
send_595_U7(0xef);       //開(kāi)通百位的位碼
delay(110);
send_595_U7(0xff);    //關(guān)閉百位消隱
}
return num1;
}

u16 ReadADC_data() //讀MAX1241 ADC轉(zhuǎn)換數(shù)據(jù)
{
u16 ADC_Data;
u8 i;
SCLK=0;
CS=0;
ADC_Data=0;
while(!DOUT);
SCLK=1;
SCLK=0;
for(i=0;i<12;i++)
{
  SCLK=1;
  ADC_Data<<=1;
  ADC_Data|=DOUT;
  SCLK=0;
}
CS=1;
SCLK=0;
return  ADC_Data;

}

上面的程序比如說(shuō)我要顯示一個(gè)體重?cái)?shù)：59.8 ，則我在顯示調(diào)用時(shí)用：Disp_tg(598);  即可顯示：59.8 但我調(diào)用：Disp_tg(ReadADC_data());
數(shù)碼管不顯示，是什么情況？哪里出了問(wèn)題？請(qǐng)大家?guī)臀铱纯闯绦颉！！?br />

ID:127275 發(fā)表于 2016-6-19 21:50