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用于arduino的MS5837-30BAR和02BAR的官方测试源程序与资料

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楼主
ID:413939发表于 2018-10-23 11:56|只看该作者|只看大图回帖奖励
用于arduino的MS5837-30BAR和02BAR的官方测试程序可以在代码里面自由对MS5837的种类进行切换，非常的方便
MS5837是高精度的压力传感器，形状微小
在很多地方都有应用，比如潜水仪器等等
另上传关于MS5837的芯片手册，供大家使用



BlueRobotics_MS5837_Library-master

源程序如下:

  2. #include "MS5837.h"
  3. #include< Wire.h>

  5. #define MS5837_ADDR           0x76  
  6. #define MS5837_RESET           0x1E
  7. #define MS5837_ADC_READ         0x00
  8. #define MS5837_PROM_READ       0xA0
  9. #define MS5837_CONVERT_D1_8192   0x4A
  10. #define MS5837_CONVERT_D2_8192   0x5A

  12. const float MS5837::Pa = 100.0f;
  13. const float MS5837::bar = 0.001f;
  14. const float MS5837::mbar = 1.0f;

  16. const uint8_t MS5837::MS5837_30BA = 0;
  17. const uint8_t MS5837::MS5837_02BA = 1;

  19. MS5837::MS5837() {
  20.        fluidDensity = 1029;
  21. }

  23. bool MS5837::init() {
  24.        // Reset the MS5837, per datasheet
  25.        Wire.beginTransmission(MS5837_ADDR);
  26.        Wire.write(MS5837_RESET);
  27.        Wire.endTransmission();

  29.        // Wait for reset to complete
  30.        delay(10);

  32.        // Read calibration values and CRC
  33.        for ( uint8_t i = 0 ; i< 7 ; i++ ) {
  34.            Wire.beginTransmission(MS5837_ADDR);
  35.            Wire.write(MS5837_PROM_READ+i*2);
  36.            Wire.endTransmission();

  38.            Wire.requestFrom(MS5837_ADDR,2);
  39.            C[i] = (Wire.read()<< 8) | Wire.read();
  40.        }

  42.        // Verify that data is correct with CRC
  43.        uint8_t crcRead = C[0] >> 12;
  44.        uint8_t crcCalculated = crc4(C);

  46.        if ( crcCalculated == crcRead ) {
  47.            return true; // Initialization success
  48.        }

  50.        return false; // CRC fail
  51. }

  53. void MS5837::setModel(uint8_t model) {
  54.        _model = model;
  55. }

  57. void MS5837::setFluidDensity(float density) {
  58.        fluidDensity = density;
  59. }

  61. void MS5837::read() {
  62.        // Request D1 conversion
  63.        Wire.beginTransmission(MS5837_ADDR);
  64.        Wire.write(MS5837_CONVERT_D1_8192);
  65.        Wire.endTransmission();

  67.        delay(20); // Max conversion time per datasheet
  68.       
  69.        Wire.beginTransmission(MS5837_ADDR);
  70.        Wire.write(MS5837_ADC_READ);
  71.        Wire.endTransmission();

  73.        Wire.requestFrom(MS5837_ADDR,3);
  74.        D1 = 0;
  75.        D1 = Wire.read();
  76.        D1 = (D1<< 8) | Wire.read();
  77.        D1 = (D1<< 8) | Wire.read();
  78.       
  79.        // Request D2 conversion
  80.        Wire.beginTransmission(MS5837_ADDR);
  81.        Wire.write(MS5837_CONVERT_D2_8192);
  82.        Wire.endTransmission();

  84.        delay(20); // Max conversion time per datasheet
  85.       
  86.        Wire.beginTransmission(MS5837_ADDR);
  87.        Wire.write(MS5837_ADC_READ);
  88.        Wire.endTransmission();

  90.        Wire.requestFrom(MS5837_ADDR,3);
  91.        D2 = 0;
  92.        D2 = Wire.read();
  93.        D2 = (D2<< 8) | Wire.read();
  94.        D2 = (D2<< 8) | Wire.read();

  96.        calculate();
  97. }

  99. void MS5837::calculate() {
  100.        // Given C1-C6 and D1, D2, calculated TEMP and P
  101.        // Do conversion first and then second order temp compensation
  102.       
  103.        int32_t dT = 0;
  104.        int64_t SENS = 0;
  105.        int64_t OFF = 0;
  106.        int32_t SENSi = 0;
  107.        int32_t OFFi = 0;  
  108.        int32_t Ti = 0;  
  109.        int64_t OFF2 = 0;
  110.        int64_t SENS2 = 0;
  111.       
  112.        // Terms called
  113.        dT = D2-uint32_t(C[5])*256l;
  114.        if ( _model == MS5837_02BA ) {
  115.            SENS = int64_t(C[1])*65536l+(int64_t(C[3])*dT)/128l;
  116.            OFF = int64_t(C[2])*131072l+(int64_t(C[4])*dT)/64l;
  117.            P = (D1*SENS/(2097152l)-OFF)/(32768l);
  118.        } else {
  119.            SENS = int64_t(C[1])*32768l+(int64_t(C[3])*dT)/256l;
  120.            OFF = int64_t(C[2])*65536l+(int64_t(C[4])*dT)/128l;
  121.            P = (D1*SENS/(2097152l)-OFF)/(8192l);
  122.        }
  123.       
  124.        // Temp conversion
  125.        TEMP = 2000l+int64_t(dT)*C[6]/8388608LL;
  126.       
  127.        //Second order compensation
  128.        if ( _model == MS5837_02BA ) {
  129.            if((TEMP/100)<20){       //Low temp
  130.                  Serial.println("here");
  131.                  Ti = (11*int64_t(dT)*int64_t(dT))/(34359738368LL);
  132.                  OFFi = (31*(TEMP-2000)*(TEMP-2000))/8;
  133.                  SENSi = (63*(TEMP-2000)*(TEMP-2000))/32;
  134.            }
  135.        } else {
  136.            if((TEMP/100)<20){       //Low temp
  137.                  Ti = (3*int64_t(dT)*int64_t(dT))/(8589934592LL);
  138.                  OFFi = (3*(TEMP-2000)*(TEMP-2000))/2;
  139.                  SENSi = (5*(TEMP-2000)*(TEMP-2000))/8;
  140.                  if((TEMP/100)<-15){   //Very low temp
  141.                        OFFi = OFFi+7*(TEMP+1500l)*(TEMP+1500l);
  142.                        SENSi = SENSi+4*(TEMP+1500l)*(TEMP+1500l);
  143.                  }
  144.            }
  145.            else if((TEMP/100)>=20){   //High temp
  146.                  Ti = 2*(dT*dT)/(137438953472LL);
  147.                  OFFi = (1*(TEMP-2000)*(TEMP-2000))/16;
  148.                  SENSi = 0;
  149.            }
  150.        }
  151.       
  152.        OFF2 = OFF-OFFi;         //Calculate pressure and temp second order
  153.        SENS2 = SENS-SENSi;
  154.       
  155.        if ( _model == MS5837_02BA ) {
  156.            TEMP = (TEMP-Ti);
  157.            P = (((D1*SENS2)/2097152l-OFF2)/32768l)/100;
  158.        } else {
  159.            TEMP = (TEMP-Ti);
  160.            P = (((D1*SENS2)/2097152l-OFF2)/8192l)/10;
  161.        }
  162. }

  164. float MS5837::pressure(float conversion) {
  165.        return P*conversion;
  166. }

  168. float MS5837::temperature() {
  169.        return TEMP/100.0f;
  170. }

  172. float MS5837::depth() {
  173.        return (pressure(MS5837::Pa)-101300)/(fluidDensity*9.80665);
  174. }

  176. float MS5837::altitude() {
  177.        return (1-pow((pressure()/1013.25),.190284))*145366.45*.3048;
  178. }


  181. uint8_t MS5837::crc4(uint16_t n_prom[]) {
  182.        uint16_t n_rem = 0;

  184.        n_prom[0] = ((n_prom[0])& 0x0FFF);
  185.        n_prom[7] = 0;

  187.        for ( uint8_t i = 0 ; i< 16; i++ ) {
  188.            if ( i%2 == 1 ) {
  189.                  n_rem ^= (uint16_t)((n_prom[i>>1])& 0x00FF);
  190.            } else {
  191.                  n_rem ^= (uint16_t)(n_prom[i>>1] >> 8);
  192.            }
  193.            for ( uint8_t n_bit = 8 ; n_bit > 0 ; n_bit-- ) {
  194.                  if ( n_rem& 0x8000 ) {
  195.                        n_rem = (n_rem<< 1) ^ 0x3000;
  196.                  } else {
  197.                        n_rem = (n_rem<< 1);
  198.                  }
  199.            }
  200.        }
  201.       
  202.        n_rem = ((n_rem >> 12)& 0x000F);

  204.        return n_rem ^ 0x00;
  205. }

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所有资料51hei提供下载:
BlueRobotics_MS5837_Library-master.zip(8.31 KB, 下载次数: 51)
MS5837-30BA芯片手册.pdf(1.21 MB, 下载次数: 22)

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沙发
ID:565602发表于 2019-10-25 19:20|只看该作者
有个客户在用，今天开始调试，先顶再读
板凳
ID:683452发表于 2020-1-8 11:30|只看该作者
蠻厲害的選擇
地板
ID:318415发表于 2020-4-4 10:57|只看该作者
感谢楼主 ！

我自己写了个ms5837 一直没找到问题 对着例子 改了改可以用  

再次感谢！！

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