51单片机多点温度采集系统程序清单.doc

#include #include #defineDATAP1 /1602驱动端口/ROM操作命令#define READ_ROM 0x33 /读ROM #define SKIP_ROM 0xCC /跳过ROM #define MATCH_ROM 0x55 /匹配ROM #define SEARCH_ROM 0xF0 /搜索ROM #define ALARM_SEARCH 0xEC /告警搜索/存储器操作命令#define ANEW_MOVE 0xB8 /重新调出E2数据#define READ_POWER 0xB4 /读电源#define TEMP_SWITCH 0x44 /启动温度变换 #define READ_MEMORY 0xBE /读暂存存储器#define COPY_MEMORY 0x48 /复制暂存存储器#define WRITE_MEMORY 0x4E /写暂存存储器/数据存储结构typedef struct tagTempDataunsigned char btThird;/百位数据unsigned char btSecond;/十位数据unsigned char btFirst;/个位数据unsigned char btDecimal;/小数点后一位数据unsigned charbtNegative;/是否为负数TEMPDATA;TEMPDATA m_TempData;/引脚定义sbit DQ = P27;/数据线端口sbit RS=P20;sbit RW=P21;sbit E=P22;/DS18B20序列号,通过调用GetROMSequence()函数在P1口读出(读8次)const unsigned char code ROMData18 = 0x28, 0x33, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0xD7;/U1const unsigned char code ROMData28 = 0x28, 0x30, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0x8E;/U2const unsigned char code ROMData38 = 0x28, 0x31, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0xB9;/U3const unsigned char code ROMData48 = 0x28, 0x32, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0xE0;/U4const unsigned char code ROMData58 = 0x28, 0x34, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0x52;/U5const unsigned char code ROMData68 = 0x28, 0x35, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0x65;/U6const unsigned char code ROMData78 = 0x28, 0x36, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0x3C;/U7const unsigned char code ROMData88 = 0x28, 0x37, 0xC5, 0xB8, 0x00, 0x00, 0x00, 0x0B;/U8/判断忙指令void Busy()DATA = 0xff;RS = 0;RW = 1; while(DATA & 0x80) E = 0; E = 1; E = 0;/写指令程序void WriteCommand(unsigned char btCommand)Busy();RS = 0;RW = 0;E = 1;DATA = btCommand;E = 0;/写数据程序void WriteData(unsigned char btData)Busy();RS = 1;RW = 0;E = 1;DATA = btData;E = 0;/清屏显示void Clear()WriteCommand(1);/初始化void Init()WriteCommand(0x0c);/开显示,无光标显示WriteCommand(0x06);/文字不动，光标自动右移WriteCommand(0x38);/设置显示模式:8位2行5x7点阵/显示单个字符void DisplayOne(bit bRow, unsigned char btColumn, unsigned char btData, bit bIsNumber)if (bRow) WriteCommand(0xc0 + btColumn);else WriteCommand(0x80 + btColumn);if (bIsNumber) WriteData(btData + 0x30);else WriteData(btData);/显示字符串函数void DisplayString(bit bRow, unsigned char btColumn, unsigned char *pData)while (*pData != 0) if (bRow) WriteCommand(0xc0 + btColumn);/显示在第1行 else WriteCommand(0x80 + btColumn);/显示在第0行WriteData(*(pData+);/要显示的数据btColumn+;/列数加一 /延时16us子函数void Delay16us()unsigned char a;for (a = 0; a 4; a+);/延时60us子函数void Delay60us()unsigned char a;for (a = 0; a 18; a+);/延时480us子函数void Delay480us()unsigned char a;for (a = 0; a 158; a+);/延时240us子函数void Delay240us()unsigned char a;for (a = 0; a 78; a+);/延时500ms子函数void Delay500ms()unsigned char a, b, c;for (a = 0; a 250; a+)for (b = 0; b 3; b+)for (c = 0; c 220; c+);/芯片初始化void Initialization()while(1)DQ = 0;Delay480us(); /延时480usDQ = 1;Delay60us();/延时60usif(!DQ) /收到ds18b20的应答信号DQ = 1;Delay240us();/延时240usbreak;/写一个字节(从低位开始写)void WriteByte(unsigned char btData)unsigned char i, btBuffer;for (i = 0; i i;if (btBuffer & 1)DQ = 0;_nop_();_nop_();DQ = 1;Delay60us();elseDQ = 0;Delay60us();DQ = 1;/读一个字节(从低位开始读)unsigned char ReadByte()unsigned char i, btDest;for (i = 0; i = 1;DQ = 0;_nop_();_nop_();DQ = 1;Delay16us();if (DQ) btDest |= 0x80; Delay60us();return btDest;/序列号匹配void MatchROM(const unsigned char *pMatchData)unsigned char i;Initialization();WriteByte(MATCH_ROM);for (i = 0; i 8; i+) WriteByte(*(pMatchData + i);/得到64位ROM序列(在P1口显示,必须与Proteus联调且在单步调试下才能得到)/*void GetROMSequence()unsigned char i;Initialization();WriteByte(READ_ROM);for (i = 0; i 8; i+)P1 = ReadByte();*/读取温度值TEMPDATA ReadTemperature()TEMPDATA TempData;unsigned int iTempDataH;unsigned char btDot, iTempDataL;static unsigned char i = 0;TempData.btNegative = 0;/为0温度为正i+;if (i = 9) i = 1;Initialization();WriteByte(SKIP_ROM);/跳过ROM匹配WriteByte(TEMP_SWITCH);/启动转换Delay500ms(); /调用一次就行Delay500ms(); Initialization();/多个芯片的时候用MatchROM(ROMData)换掉WriteByte(SKIP_ROM)switch (i)case 1 : MatchROM(ROMData1); break;/匹配1case 2 : MatchROM(ROMData2); break;/匹配2case 3 : MatchROM(ROMData3); break;/匹配3case 4 : MatchROM(ROMData4); break;/匹配4case 5 : MatchROM(ROMData5); break;/匹配5case 6 : MatchROM(ROMData6); break;/匹配6case 7 : MatchROM(ROMData7); break;/匹配7case 8 : MatchROM(ROMData8); break;/匹配8/WriteByte(SKIP_ROM);/跳过ROM匹配(单个芯片时用这句换掉上面的switch)WriteByte(READ_MEMORY);/读数据iTempDataL = ReadByte();iTempDataH = ReadByte();iTempDataH = 4;/得到整数部分btDot *= 5; /btDot*10/16得到转换后的小数数据btDot = 3;/数据处理TempData.btThird = (unsigned char)iTempDataH / 100;TempData.btSecond = (unsigned char)iTempDataH % 100 / 10;TempData.btFirst = (unsigned char)iTempDataH % 10;TempData.btDecimal = btDot;return TempData;/数据处理子程序void DataProcess()m_TempData = ReadTemperature();if (m_TempData.btNegative) DisplayOne(1, 6, -, 0);else DisplayOne(1, 6, m_TempData.btThird, 1);D