250K-T8S
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189
temperature.C
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189
temperature.C
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#include "temperature.H"
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#include <stdio.h>
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#include <math.h>
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UnSwSample UnSwSample_1 = {0};
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#define Measure_Period 11000
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////////////////////////////////////////////////////////////////////
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// <20><><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD>е<EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD>
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unsigned char CRC8MY(unsigned char *serial, unsigned char length)
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{
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unsigned char result = 0x00;
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unsigned char pDataBuf;
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unsigned char i;
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while (length--) {
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pDataBuf = *serial++;
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for (i = 0; i < 8; i++) {
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if ((result ^ pDataBuf) & 0x01) {
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result ^= 0x18;
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result >>= 1;
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result |= 0x80;
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}
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else {
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result >>= 1;
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}
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pDataBuf >>= 1;
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}
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}
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return result; //<2F><><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD>
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}
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//<2F>Ǿ<EFBFBD>ȷ<EFBFBD><C8B7>ʱ10*X us<75><73><EFBFBD>̶<EFBFBD><CCB6><EFBFBD><EFBFBD><EFBFBD>10us
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//@12.000MHz 12Tģʽ
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void Delay_us(uword x)
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{
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for (; x > 0; x--)
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{
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_nop_();
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_nop_();
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}
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}
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////////////////////////////////////////////////////////////////////
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><>λ<EFBFBD><CEBB><EFBFBD>壨 <20><><EFBFBD><EFBFBD> 480 us <20>͵<EFBFBD>ƽ<EFBFBD><C6BD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>
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unsigned char ow_resetpresence(void)
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{
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unsigned char presence; int count=0;
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P3_DIR = P3_DIR | 0x20; // load direction register P3.5<EFBFBD>л<EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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DQ = 0; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD>
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Delay_us(240); // <20><><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD> 480us
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DQ = 1; // <20><><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD>ߣ<EFBFBD><DFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P3_DIR = P3_DIR & 0xDF;// load direction register
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Delay_us(40); // <20>ȴ<EFBFBD> 80us <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> presence
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presence = DQ; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>
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while( presence && (count< 17) )
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{
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Delay_us(2);
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presence = DQ;
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count++;
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}
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Delay_us(200); // ʱ<><CAB1>ĩβ <20>ȴ<EFBFBD>
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return(presence);
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} // presence =0 ʱ<><CAB1> M6 01 <20><><EFBFBD><EFBFBD> , presence =1 ʱ<><CAB1> M601 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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////////////////////////////////////////////////////////////////////
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//// READ_BIT <20>C <20><> M601 <20><>ȡ һλ<D2BB><CEBB>
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unsigned char read_bit(void)
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{
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unsigned char res;
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P3_DIR = P3_DIR | 0x20; // load direction register <20>л<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>״̬
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DQ = 0; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD>
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Delay_us(2); // <20><><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD> 3us
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DQ = 1; // <20><><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD> DQ <20><><EFBFBD>ߣ<EFBFBD><DFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Delay_us(5); // <20>ȴ<EFBFBD> 10us ȷ<><C8B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȶ<EFBFBD>
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P3_DIR = P3_DIR & 0xDF;// load direction register
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res = DQ;
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Delay_us(28); // ʱ<><CAB1>ĩβ <20>ȴ<EFBFBD>
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return(res); // <20><><EFBFBD>ض<EFBFBD>ȡ <20><>ֵ
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}
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////////////////////////////////////////////////////////////////////
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//// WRITE_BIT <20>C <20><><EFBFBD><EFBFBD> дһλ<D2BB><CEBB><EFBFBD><EFBFBD> <20><> M601
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void write_bit(char bitval)
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{
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P3_DIR = P3_DIR | 0x20; // load direction register <20>л<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>״̬
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DQ = 0; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD>
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Delay_us(2); // <20><><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD> 5us
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if(bitval == 1) DQ =1; // <20><><EFBFBD><EFBFBD> д 1<><31><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD>
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Delay_us(25); // <20><><EFBFBD><EFBFBD> д 0<><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DQ <20><><EFBFBD><EFBFBD> 60 us
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DQ = 1; // <20>ͷ<EFBFBD> DQ <20><><EFBFBD><EFBFBD>
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Delay_us(5); // <20><>д 0<><30><EFBFBD>ָ<EFBFBD> ʱ<><CAB1> 10us
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}
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/////////////////////////////////////////////////////////////////////
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//// READ_BYTE - <20><> M601 <20><>ȡ һ<>ֽ<EFBFBD> <20><><EFBFBD><EFBFBD>
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unsigned char read_byte(void)
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{
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unsigned char i, j;
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unsigned char value = 0;
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for (i = 0;i < 8;i++) {
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j = read_bit();
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value = (value) | (j<<i); // ÿ<>ζ<EFBFBD><CEB6><EFBFBD> 1 λ(<28><>λ <20><><EFBFBD><EFBFBD> ), Ȼ<><C8BB> <20><><EFBFBD><EFBFBD>
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}
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return(value);
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}
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/////////////////////////////////////////////////////////////////////
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//// WRITE_BYTE - <20><><EFBFBD><EFBFBD> дһ<D0B4>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD><EFBFBD> <20><> M601
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void write_byte(char val)
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{
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unsigned char i;
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unsigned char temp;
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for (i = 0; i < 8; i++) { // д<>ֽ<EFBFBD> ,ÿ<><C3BF> һλ
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temp = val >> i;
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temp &= 0x01; // <20><>λ <20><><EFBFBD><EFBFBD>
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write_bit(temp);
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}
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}
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//<2F><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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void Single_point_Read_Temperature(void)
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{
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unsigned char get[9];
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unsigned char tpmsb, tplsb, i;
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int signedInt_f_tem;
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short s_tem;
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short wtem;
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float f_tem;
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UnSwSample_1.bit_data.reserve = 0;
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if (ow_resetpresence())
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{
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// <20><><EFBFBD>鱣<EFBFBD><E9B1A3><EFBFBD><EFBFBD><EFBFBD>жϣ<D0B6><CFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Ų<EFBFBD>Ӳ<EFBFBD><D3B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣡
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// printf("\nPresence Error\n");
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UnSwSample_1.bit_data.reserve = 0x01;
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}
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write_byte(0xCC); //Skip ROM <20><><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9> ƥ<><C6A5> ROM <20><><EFBFBD>к<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD>
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write_byte(0x44); // ת<><D7AA> <20>¶<EFBFBD>
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Delay_us(Measure_Period / 2);
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// <20>¶<EFBFBD> ת<><D7AA>ʱ<EFBFBD>䣬 Ӧ<><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>üĴ<C3BC><C4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD><D8B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><D1A1> 4ms <20><>5.5ms <20><> 10.5m
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if (ow_resetpresence())
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{
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// <20><><EFBFBD>鱣<EFBFBD><E9B1A3><EFBFBD><EFBFBD><EFBFBD>жϣ<D0B6><CFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Ų<EFBFBD>Ӳ<EFBFBD><D3B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣡
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// printf("\nPresence Error\n");
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UnSwSample_1.bit_data.reserve = 0x02;
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}
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write_byte(0xCC); // Skip ROM <20><><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9> ƥ<><C6A5> ROM <20><><EFBFBD>к<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD>
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write_byte(0xBE); // <20><>ȡ Scratch Pad <20><><EFBFBD><EFBFBD>ֵ
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for (i = 0; i < 9; i++) get[i]=read_byte();
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if(get[8] != CRC8MY(get,8))
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{
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// <20><><EFBFBD>鱣<EFBFBD><E9B1A3><EFBFBD><EFBFBD><EFBFBD>жϣ<D0B6><CFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Ų<EFBFBD><C5B2><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣡
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// printf("\nCRC Error\n");
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UnSwSample_1.bit_data.reserve = 0x03;
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}
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else
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{
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tpmsb = get[1]; // <20>¶ȸ<C2B6><C8B8>ֽ<EFBFBD>
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tplsb = get[0]; // <20>¶<EFBFBD> <20><><EFBFBD>ֽ<EFBFBD>
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wtem= (tpmsb << 8 | tplsb);
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s_tem =(short) wtem;
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f_tem=(s_tem * 1.0)/256 + 40.0;
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>Ϊ<EFBFBD>з<EFBFBD><D0B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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signedInt_f_tem = (int)f_tem;
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// <20>¶<EFBFBD> <20>з<EFBFBD><D0B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA><EFBFBD><EFBFBD><DEB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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UnSwSample_1.bit_data.temperature = (unsigned int)signedInt_f_tem;
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// printf( "\nTemp= %f degrees C\n", f_tem); // <20><>ӡ<EFBFBD><D3A1><EFBFBD><EFBFBD><EFBFBD>¶<EFBFBD>
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}
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}
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