购买了一个ADC0831程序，正确读取电压值。NTC(3950 10K)显示温度，但在转换电阻值和检查表时无法编写正确的程序。经过多次实验，程序仍然无法编写。我别无选择，只能请大神给我一些建议。我非常感谢你给文献作为参考！！！单片机使用；STC89C52;
#include
#include
#define uint unsigned int
#define uchar unsigned char
sbit SCK = P1^0; //11脚数据时钟
sbit RCK = P1^1; //12脚输出时钟
sbit SI= P1^2; //14脚数据
sbit CS=P1^3; //ADC片选信号
sbit CLK=P1^4; //ADC时钟信号
sbit DO=P1^5; //ADC数据接口
unsigned int NTC_R;///定义热敏电阻值变量
unsigned char code segmcode[]={
0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90//共阴极数码管段码0-9
};
unsigned int code Ttable[106][2]={///温度与电阻值对应
0，3274，/0度对应阻值32.74k
1.3111//1度对应的阻值31.11k
2.2957，/2度对应阻值29.57k
3,2812,//
4,2674,//
5,2545,
6,2422,
7,2306,
8,2196,
9,2092,
10,1993,
11,1900,
12,1811,
13,1728,
14,1648,
15,1573,
16,1501,
17,1433,
18,1369,
19,1308,
20,1250,
21,1194,
22,1142,
23,1092,
24,1045,
25.1000，/25度对应阻值100k
26、957、/26度对应电阻9.57k
27,916,
28,877,
29,840,
30,805,
31,771,
32,739,
33,709,
34,679,
35,652,
36,625,
37,600,
38,576,
39,553,
40,531,
41,510,
42,490,
43,471,
44,453,
45,435,
46,418,
47,402,
48,387,
49,372,
50,358,
51,345,
52,332,
53,320,
54,308,
55,297,
56,286,
57,276,
58,266,
59,256,
60,247,
61,238,
62,230,
63,222,
64,214,
65,207,
66,199,
67,193,
68,186,
69,180,
70,174,
71,168,
72,162,
73,157,
74, 152,
75, 147,
76, 142,
77, 137,
78, 133,
79, 128,
80, 124,
81, 120,
82, 116,
83, 113,
84, 109,
85, 106,
86, 102/86度对应的阻值.02k
87, 99/87度对应的阻值0.99k
88, 96,
89, 93,
90, 90,
91, 88,
92, 85,
93, 82,
94, 80,
95, 78,
96, 75,
97, 73,
98, 71,
99, 69,
100,67,
101,65,
102,63,
103,61,
104,59,
58/105度对应的阻值0.58k
};
unsigned char data bitcode[4]={0，0，0，0，0，0}；//数码管显示位置 1-4
unsigned int date,i;
void hc595(uchar num)
{
uchar i;
for(i=0;i<8;i )
{
SI=(num<
SCK=0;
_nop_();
SCK=1;
SCK=0;
}
RCK=0;
_nop_();
RCK=1;
RCK=0;
}
unsigned char ad_conv(void){
unsigned char i,com;
CS=1;
CLK=0; _nop_(); _nop_();
CS=0; _nop_(); _nop_();//CS低，启动转换
CLK=1; _nop_(); _nop_();
CLK=0; _nop_(); _nop_()//准备输出数据
CLK=1; _nop_(); _nop_();
for(i=8;i>0;i--){
CLK=1; //第二至九个下降沿
_nop_();
_nop_();
com<<=1;//左移，先采最高位
if(DO)com++;//采当前数据
CLK=0;
_nop_();
_nop_();
}
CS=1;
_nop_();
_nop_();
return com;
}
//数码管显：
void display()
{
static uchar i=0;
bitcode[0]=segmcode[date/100] ;
bitcode[1]=segmcode[date%100/10];
bitcode[2]=segmcode[date%10];
P0=0xFF;
hc595(0x01<
P0=bitcode[i];
i++;
i%=3;
}
void main(void)
{
uchar i = 0;
while(1)
{
i++;
if(i==100)
{
i=0;
date=ad_conv()*100;
date=date/51;
}
display(); //显示
}
}