湖南大學STC-B單片機學習板光照溫度測量程序(AD轉換)

ID:427912 · 發表于 2018-11-16 21:07

可以將光照值和溫度值顯示在數碼管上(AD轉換)

單片機源程序如下:

#include <reg52.h>
#include <intrins.h>
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr CLK_DIV = 0x97;
//sfr AUXR = 0x8E;
sfr ADC_CONTR = 0xBC; //ADC控制寄存器
sfr ADC_RES = 0xBD; //ADC高8位結果
sfr ADC_LOW2 = 0xBE; //ADC低2位結果
sfr P1ASF = 0x9D; //P1口模擬功能控制寄存器
#define ADC_POWER 0x80 //ADC電源控制位
#define ADC_FLAG 0x10 //ADC完成標志
#define ADC_START 0x08 //ADC起始控制位
#define ADC_SPEEDLL 0x00 //540個時鐘
#define ADC_SPEEDL 0x20 //360個時鐘
#define ADC_SPEEDH 0x40 //180個時鐘
#define ADC_SPEEDHH 0x60 //90個時鐘
sbit LED_SEL = P2^3;
sbit BEEP = P3^4;
unsigned char code LedChar[] = { //數碼管顯示字符轉換表 0-F
0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07,
0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71
};
unsigned char LedBuff[9] = { //數碼管顯示緩沖區 + 獨立LED緩沖區
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
int code TempData[]={
239,197,175,160,150,142,135,129,124,120,116,113,109,107,104,101, //溫度值對應表
99, 97, 95, 93, 91, 90, 88, 86, 85, 84, 82, 81, 80, 78, 77, 76,
75, 74, 73, 72, 71, 70, 69, 68, 67, 67, 66, 65, 64, 63, 63, 62,
61, 61, 60, 59, 58, 58, 57, 57, 56, 55, 55, 54, 54, 53, 52, 52,
51, 51, 50, 50, 49, 49, 48, 48, 47, 47, 46, 46, 45, 45, 44, 44,
43, 43, 42, 42, 41, 41, 41, 40, 40, 39, 39, 38, 38, 38, 37, 37,
36, 36, 36, 35, 35, 34, 34, 34, 33, 33, 32, 32, 32, 31, 31, 31,
30, 30, 29, 29, 29, 28, 28, 28, 27, 27, 27, 26, 26, 26, 25, 25,
24, 24, 24, 23, 23, 23, 22, 22, 22, 21, 21, 21, 20, 20, 20, 19,
19, 19, 18, 18, 18, 17, 17, 16, 16, 16, 15, 15, 15, 14, 14, 14,
13, 13, 13, 12, 12, 12, 11, 11, 11, 10, 10, 9, 9, 9, 8, 8, 8, 7,
7, 7, 6, 6,5, 5, 54,4, 3, 3,3, 2, 2, 1, 1, 1, 0, 0, -1, -1, -1,
-2, -2, -3, -3, -4, -4, -5, -5, -6, -6, -7, -7, -8, -8, -9, -9,
-10, -10, -11, -11, -12, -13, -13, -14, -14, -15, -16, -16, -17,
-18, -19, -19, -20, -21, -22, -23, -24, -25, -26, -27, -28, -29,
30, -32, -33, -35, -36, -38, -40, -43, -46, -50, -55, -63, 361
};
unsigned char ch = 3; //ADC通道號
int temp = 0;
unsigned int light = 0;
unsigned char T0RH = 0; //T0重載值的高字節
unsigned char T0RL = 0; //T0重載值的低字節
bit beep_flag = 0; //蜂鳴器運行控制位
void InitADC();
void Delay2ms();
void ConfigTimer0(unsigned int ms);
void main()
{
P0M0 = 0xFF;
P0M1 = 0x00;
P2M0 = 0x08;
P2M1 = 0x00;
LED_SEL = 0;
InitADC(); //初始化ADC
IE = 0xA0; //使能ADC中斷
//開始AD轉換
ConfigTimer0(1); //配置T0定時1ms
while(1)
{
if (temp < 0)
{
LedBuff[0] = 0x40;
LedBuff[1] = LedChar[-temp/10%10];
LedBuff[2] = LedChar[-temp%10];
}
else
{
LedBuff[0] = LedChar[temp/100%10];
LedBuff[1] = LedChar[temp/10%10];
LedBuff[2] = LedChar[temp%10];
}
LedBuff[5] = LedChar[light/100%10];
LedBuff[6] = LedChar[light/10%10];
LedBuff[7] = LedChar[light%10];
if (temp >= 28)
{
beep_flag = 1;
LedBuff[8] = 0xFF;
}
else
{
LedBuff[8] = 0x01;
}
}
}
/* ADC中斷服務程序 */
void adc_isr() interrupt 5 using 1
{
static unsigned int cnt = 0; //記錄ADC中斷次數
static unsigned long temp_sum = 0; //溫度AD值累加和
static unsigned long light_sum = 0; //光照AD值累加和
cnt++; //中斷次數+1
ADC_CONTR &= !ADC_FLAG; //清除ADC中斷標志
if (ch == 3)
{
temp_sum += (ADC_RES*256+ADC_LOW2)/4;
}
if (ch == 4)
{
light_sum += ADC_RES*256+ADC_LOW2;
}
if (cnt > 2000)
{
cnt = 0;
temp = TempData[(temp_sum+1000/2)/1000-1];
light = (light_sum+1000/2)/1000;
temp_sum = 0;
light_sum = 0;
}
ADC_RES = 0;
ADC_LOW2 = 0; //清除結果寄存器
if (++ch == 5) ch=3; //切換到下一個通道
ADC_CONTR = ADC_POWER|ADC_SPEEDLL|ADC_START|ch;
CLK_DIV = 0x20;
}
/* 初始化ADC */
void InitADC()
{
P1ASF = 0xFF; //設置P1口為AD口
ADC_RES = 0;
ADC_LOW2 = 0; //清除結果寄存器
ADC_CONTR = ADC_POWER|ADC_SPEEDLL|ADC_START|ch;
CLK_DIV = 0x20; //ADC_RES[1:0]存放高2位ADC結果,ADC_RESL[7:0]存放低8位ADC結果
Delay2ms(); //ADC上電并延時
}
void Delay2ms() //@11.0592MHz
{
unsigned char i, j;
_nop_();
_nop_();
i = 22;
j = 128;
do
{
while (--j);
} while (--i);
}
/* 配置并啟動T0,ms為T0定時時間 */
void ConfigTimer0(unsigned int ms)
{
unsigned long tmp; //臨時變量
tmp = 11059200 / 12; //定時器計數頻率
tmp = (tmp * ms) / 1000; //計算所需的計數值
tmp = 65536 - tmp; //計算定時器重載值
tmp = tmp + 13; //補償中斷響應延時造成的誤差
T0RH = (unsigned char)(tmp>>8); //定時器重載值拆分為高低字節
T0RL = (unsigned char)tmp;
TMOD &= 0xF0; //清零T0的控制位
TMOD |= 0x01; //配置T0為模式1
TH0 = T0RH; //加載T0重載值
TL0 = T0RL;
ET0 = 1; //使能T0中斷
TR0 = 1; //啟動T0
}
/* LED動態掃描函數,需在定時中斷中調用 */
void LedScan()
{
static unsigned char i = 0; //動態掃描索引
P0 = 0x00; //關閉所有段選位,顯示消隱
P2 = (P2 & 0xF0) | i; //位選索引值賦值到P2口低3位
P0 = LedBuff[i]; //緩沖區中索引位置的數據送到P0口
if (i < sizeof(LedBuff)-1) //索引遞增循環,遍歷整個緩沖區
i++;
else
i = 0;
}
/* T0中斷服務函數,完成數碼管掃描 */
void InterruptTimer0() interrupt 1
{
static unsigned int cnt = 0;
TH0 = T0RH; //重新加載重載值
TL0 = T0RL;
LedScan(); //LED掃描顯示
if (beep_flag)
{
BEEP = ~BEEP; //反轉蜂鳴器控制電平
cnt++;
if (cnt > 5000) { //中斷5000次后,即定時5ms
cnt = 0;
beep_flag = 0;
}
}
}

復制代碼

所有資料51hei提供下載:

lesson5.zip (39.54 KB, 下載次數: 11)

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湖南大學STC-B單片機學習板光照溫度測量程序(AD轉換)