[转帖]DS18B20测温传感器C51源程序！

cpubbs 发表于 2005-11-5 20:22:44

转贴自精诚电子：
/************************************************************
*18B20驱动程序，DQ为数据口，接于P2.1
*11.0592M晶振，上拉4.7k电阻
*Author:fyb
*2005-3-25 11:23，OK!
*************************************************************/
#include<reg51.h>
#include<intrins.h>

#define uchar unsigned char
#define uintunsigned int

sbit dq = P1^7;
bitflag;
uint Temperature;
uchar temp_buff; //存储读取的字节，read scratchpad为9字节，read rom ID为8字节
uchar id_buff;
uchar *p;
uchar crc_data;
uchar code CrcTable ={
0,94, 188,226,97,63,221,131,194,156,126,32,163,253,31,65,
157,195,33,127,252,162,64,30,95,1,227,189,62,96,130,220,
35,125,159,193,66,28,254,160,225,191,93,3,128,222,60,98,
190,224,2,92,223,129,99,61,124,34,192,158,29,67,161,255,
70,24,250,164,39,121,155,197,132,218,56,102,229,187,89,7,
219,133, 103,57,186,228,6,88,25,71,165,251,120,38,196,154,
101,59, 217,135,4,90,184,230,167,249,27,69,198,152,122,36,
248,166, 68,26,153,199,37,123,58,100,134,216,91,5,231,185,
140,210, 48,110,237,179,81,15,78,16,242,172,47,113,147,205,
17,79,173,243,112,46,204,146,211,141,111,49,178,236,14,80,
175,241, 19,77,206,144,114,44,109,51,209,143,12,82,176,238,
50,108,142,208,83,13,239,177,240,174,76,18,145,207,45,115,
202,148, 118,40,171,245,23,73,8,86,180,234,105,55,213, 139,
87,9,235,181,54,104,138,212,149,203,41,119,244,170,72,22,
233,183,85,11,136,214,52,106,43,117,151,201,74,20,246,168,
116,42,200,150,21,75,169,247,182,232,10,84,215,137,107,53};
//
/************************************************************
*Function:延时处理
*parameter:
*Return:
*Modify:
*************************************************************/
void TempDelay (uchar us)
{
while(us--);
}
/************************************************************
*Function:18B20初始化
*parameter:
*Return:
*Modify:
*************************************************************/
void Init18b20 (void)
{
dq=1;
_nop_();
dq=0;
TempDelay(86); //delay 530 uS//80
_nop_();
dq=1;
TempDelay(14); //delay 100 uS//14
_nop_();
_nop_();
_nop_();

if(dq==0)
flag = 1; //detect 1820 success!
else
flag = 0; //detect 1820 fail!
TempDelay(20); //20
_nop_();
_nop_();
dq = 1;
}
/************************************************************
*Function:向18B20写入一个字节
*parameter:
*Return:
*Modify:
*************************************************************/
void WriteByte (uchar wr)//单字节写入
{
uchar i;
for (i=0;i<8;i++)
{
dq = 0;
_nop_();
dq=wr&0x01;
TempDelay(5); //delay 45 uS //5
_nop_();
_nop_();
dq=1;
wr >>= 1;
}
}
/************************************************************
*Function:读18B20的一个字节
*parameter:
*Return:
*Modify:
*************************************************************/
uchar ReadByte (void) //读取单字节
{
uchar i,u=0;
for(i=0;i<8;i++)
{
dq = 0;
u >>= 1;
dq = 1;
if(dq==1)
u |= 0x80;
TempDelay (4);
_nop_();
}
return(u);
}
/************************************************************
*Function:读18B20
*parameter:
*Return:
*Modify:
*************************************************************/
void read_bytes (uchar j)
{
uchar i;
for(i=0;i<j;i++)
[此贴子已经被作者于2005-11-7 10:16:24编辑过]

cpubbs 发表于 2005-11-7 20:24:44

再贴一个汇编的：转自C51BBS：
;12位分辨率DS18B20程序 ;====================================================================== ;由于公司代理服务器的限制，不能ftp到laogu.com,如果您 ;需更多的DS18B20(C51/PIC/DSP)资料,QQ:432656 ;12G最新版本的各种软件，操作系统/编程/代码/资料 ;哪位好心人帮我上传一些软件，谢谢！ ;====================================================================== ;下面代码是本人在前人的基础上，吸收优化，适合本人实际应用。 ;;特点： ;1.防止定时器打断时序; ;2.考虑了DS18B20损坏或者断线,单片机不会死循环; ;3.具备补码=〉原码; ;4.复位不正常时给出温度-55度,提醒用户检查; ;5.稳定性:冰水 0度->用电吹风 120度->冰水 0度正常//测试时请不要把引脚弄湿短路 ;6.破坏性：加热到150度以上，再降温到120度，软件正常显示实际温度； ;注意： ;在调试中,发现时序与DS18B20的批次有关，不同批次需要微调时序; ;如果发现结果错误,请先调整debug 1,不行再依次调整debug 2,debug 3…… ;或许全部都要调整，看你运气 ^_^； ;CPU AT89C52 11.0592MHz ;DQ BIT P1.7 ;********************************************************************** ;//12位分辨率 ;检测DS18B20的温度,最多检测3次;如果失败,给出-55度 ;出口:DS1820_L,DS1820_H ;使用资源:A,C,R0,R6,R7,TH0 ;Edited by hello 2002/08/19/22 ;Changed by hello 2002/08/20/16/06||禁止修改|| ;---------------------------------------------------------------------- DS1820: MOV DS1820_L,#70H MOV DS1820_H,#83H MOV TH0,#00 ;防止中断打乱时序 MOV R1,#03 DS1820_1: LCALL RE1820 ;RESET DS1820 JNZ DS1820_9 ;RESET FAIL MOV TH0,#00 ;防止中断打乱时序 MOV A,#0CCH ;SKIP ROM LCALL WR1820 MOV A,#44H ;CONVER T LCALL WR1820 MOV A,#8 ;/debug 4 LCALL DL100M ;100ms MOV TH0,#00 LCALL RE1820 ;RESET DS1820 JNZ DS1820_9 ;RESET FAIL MOV A,#0CCH ;SKIP ROM LCALL WR1820 MOV TH0,#00 ;防止中断打乱时序 MOV A,#0BEH ;Read scratchpad LCALL WR1820 MOV TH0,#00 ;防止中断打乱时序 LCALL RD1820 MOV DS1820_L,A LCALL RD1820 MOV DS1820_H,A ;采样完成 ;SJMP DS1820_EXIT CJNE A,#80H,$+3 ;以下给同事提供方便,将补码还原成原码 JC DS1820_EXIT CPL A SETB ACC.7 MOV DS1820_H,A MOV A,DS1820_L CPL A INC A MOV DS1820_L,A SJMP DS1820_EXIT DS1820_9: DJNZ R1,DS1820_1 DS1820_EXIT: RET ;------------------------------------------------------------------------- ; ;出口:A ;复位成功:A=#0,复位失败:A=#0FFH ;使用资源:A,R7 ;Edited by hello 2002/08/20 ;------------------------------------------------------------------------- RE1820: MOV A,#00H ;RESET DS1820 OK CLR DQ MOV R7,#100 DJNZ R7,$ DJNZ R7,$ ;DQ=#0,DELAY=255*2+100*2=710us/debug 3 SETB DQ MOV R7,#35 DJNZ R7,$ ;DQ=#1,DELAY=35*2=70us /debug 3 JNB DQ,RE1820_1 ;RESET OK,GOTO RE1820_1 MOV A,#0FFH ;FAIL,A=#0FFH RE1820_1: MOV R7,#240 DJNZ R7,$ ;DELAY=160*2=320us /debug 3 RET ;------------------------------------------------------------------------ ; ;入口:A ;使用资源:A,C,R6,R7 ;Edited by hello 2002/08/20 ;------------------------------------------------------------------------ WR1820: MOV R6,#08 ;1B=8bit WR1820_1: CLR DQ MOV R7,#6 DJNZ R7,$ ;DQ=#0,DELAY=7*2=15us //debug 2 RRC A ;1us MOV DQ,C ;1us MOV R7,#25 DJNZ R7,$ ;DQ=#1,20*2=60us //debug 2 SETB DQ NOP NOP DJNZ R6,WR1820_1 SETB DQ RET ;---------------------------------------------------------------------- ; ;出口 :A ;使用资源:A,C,R6,R7 ;Edited by hello 2002/08/20 ;---------------------------------------------------------------------- RD1820: MOV R6,#08 RD1820_1: SETB DQ NOP NOP NOP CLR DQ NOP NOP NOP SETB DQ MOV R7,#7 DJNZ R7,$ ;DQ=1,9*2=18us //debug 1 MOV C,DQ RRC A MOV R7,#7 DJNZ R7,$ ;DQ=1,9*2=18us //debug 1 NOP DJNZ R6,RD1820_1 RET ;---------------------------------------------------------------------- ;**********************************************************************

cpubbs 发表于 2005-11-7 20:25:41

DS18B20testcode：
//******************************************* //DS18B20 with 51 core driver //use 6MHZ osc //Create Time: 2005 08 18 //Modify Time: //******************************************** #include"REG51.h" #include"Uart.h" #include "INTRINS.h" sbit DS18B20Pin = P3^5; unsigned char TempBuffer; //#define SYSTEMDELAY(unsigned int wDelayIndex) {for(wDelayIndex = 100; wDelayIndex > 0; wDelayIndex-- );} //******************************************** // Function declare //******************************************** void SystemDelay( int t); unsigned char BusWireReset(void); unsigned char DS18B20ReadSingleByte(); void DS18B20WireSingleByte( unsigned char); void Read_Temperature(void); //======================================================== void SystemDelay(int t ) { while(t--); } //======================================================== void InitMCUSet(void) { P0 = 0xff; DS18B20Pin = 1; TMOD = 0x21; //TIME1 use mode 2 reload count ; Time0 use mode 1 TCON = 0x40; SCON = 0x50; PCON = 0x80;//SMOD = 1; TL1= 0xf3;//BaudRate is 2400bps TH1= 0xf3; TH0 = 0; TL0 = 0; IE = 0x90; //EA = 1; ET0 = 0; // ET0 = 1; // EX0 = 1; } //======================================================== unsigned char BusWireReset() { unsigned char ucFlag = 0; DS18B20Pin = 0; SystemDelay(23); DS18B20Pin = 1; SystemDelay(2); //_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_(); ucFlag =DS18B20Pin ;// if DS18B20PIN == 0 then find device SystemDelay(18); return ucFlag; } //======================================================== unsigned char DS18B20ReadSingleByte() { unsigned char ucData ; unsigned char i; for( i = 0; i < 8; i++) { DS18B20Pin = 0; _nop_(); DS18B20Pin = 1; _nop_();_nop_(); _nop_();_nop_(); _nop_();_nop_(); ucData >>= 1; ucData |= (DS18B20Pin == 1)? 0x80:0x00; SystemDelay(3); } // SystemDelay(3); return ucData; } //======================================================== void DS18B20WireSingleByte( unsigned char ucData) { unsigned char i; for( i = 0; i < 8; i++) { DS18B20Pin = 0; DS18B20Pin =((ucData & 0x01) == 0x01); ucData >>=1; SystemDelay(3); DS18B20Pin = 1; } // SystemDelay(3); } //======================================================== void Read_Temperature(void) { unsigned char i; if(BusWireReset() == 0) UART_SendMultiByte(SucessTable,3 ); DS18B20WireSingleByte(0xCC); //Skip ROM DS18B20WireSingleByte(0x44); // Start Conversion //SYSTEMDELAY(2); SystemDelay(2); if(BusWireReset()==0) UART_SendMultiByte(SucessTable,3 ); DS18B20WireSingleByte(0xcc); // Skip ROM DS18B20WireSingleByte(0xBE);// Read Scratch Pad for( i = 0; i < 8; i++) { TempBuffer = DS18B20ReadSingleByte(); } UART_SendMultiByte(TempBuffer,2); } //======================================================== void main(void) { InitMCUSet(); UART_SendMultiByte(HexTable,16); while(1) { Read_Temperature(); SystemDelay(30000); } } #ifndef __UART_H__ #define __UART_H__ //#include"Definetype.h" //#define SYSCLK 11059200 #define SYSCLK 20000000 #define BAUDRATE0 9600 #define DB_SENDMAXSIZE 0x10 #define DB_RECMAXSIZE0x10 #define UART_LENGTH_R 1 #define UART_COMMEND_R2 #define UART_DATA_R 3 #define UART_VERIFY_R 4 #define UART_LENGTH_SEND 1 #define UART_COMMEND_SEND2 #define UART_DATA_SEND 3 #define UART_VERIFY_SEND 4 bitg_bReceiveSuccess= 0; unsigned char g_ucReceiveIndex = 0; unsigned char g_ucRecvStyle = UART_LENGTH_R; unsigned char g_ucSendIndex = 0; unsigned char g_ucSendStyle ; unsigned charg_ucVerifySum; #define UART_BUFFERSIZE0x0f // Length + Commend + Datas + SumVerify #define COMMEND 0x0A char code HexTable[]={"0123456789ABCDEF"}; unsigned char code SucessTable[]= {0x00,0x01,0x02}; struct UartPackage { unsigned char ucLength; unsigned char ucCommend; unsigned char ucDataBuffers; unsigned char ucVerifySum; }; struct UartPackageUartRX,UartTX; //void UART_SendMultiByte( unsigned char*Buffer ,unsigned ucLenth); void UART_SendMultiByte( unsigned char*Buffer ,unsigned ucLenth) { unsigned char i; ES = 0; for(i = 0; i < ucLenth; i++) { SBUF = Buffer; while(!TI); TI = 0; } ES = 1; } #endif

页: [1]

cpubbs论坛's Archiver

[转帖]DS18B20测温传感器C51源程序！