xinnianchang：
樓主可以請(qǐng)教一下問題嗎就是這個(gè)單片機(jī)的ADC的編程問題和外圍連接問題我弄了一個(gè)這樣的程序不過好像有誤差挺大的，還有那個(gè)外部的連接問題怎樣改加入我要測(cè)量超過5v的電壓#include"Text2.h" //stc12c5a60s2頭文件#defineucharunsignedchar#defineuintunsignedintunsignedchardata adc_dat=0x30;ucharge,shi,shifen,baifen,qianfen;floatvin,R;int vins;sbitdula=P3^6;ucharcodetable[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10}; //有小數(shù)點(diǎn)的ucharcodetable1[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; //沒小數(shù)點(diǎn)的voiddisplay(ucharshi,ucharge,ucharshifen,ucharbaifen,ucharqianfen);voiddelay(uintz) //延時(shí)子函數(shù){ uintx,y; for(x=z;x>0;x--) for(y=110;y>0;y--);}voidmain(void){ unsignedlongi; unsignedcharstatus; ADC_CONTR|=0x80; //打開AD轉(zhuǎn)換電源 for(i=0;i