Diff: MS5803.cpp

Revision:

5:7d839d3899f8

Parent:

4:ff505486c804

--- a/MS5803.cpp	Sun Mar 20 03:05:18 2016 +0000
+++ b/MS5803.cpp	Wed Sep 22 16:14:24 2021 +0000
@@ -60,7 +60,7 @@
         ms5803_tx_data[0] = ms5803_PROMread + (j<<1);
         if ( i2c.write( device_address,  ms5803_tx_data, 1 ) );
         if ( i2c.read( device_address,  ms5803_rx_data, 2 ) );
-        C[i]   = ms5803_rx_data[1] + (ms5803_rx_data[0]<<8);
+        C[i]   = (unsigned short) ((unsigned int)ms5803_rx_data[1] + (((unsigned int)ms5803_rx_data[0])<<8));
     }
 }
 
@@ -86,7 +86,7 @@
     ms5803_tx_data[0] = ms5803_ADCread;
     if ( i2c.write( device_address,  ms5803_tx_data, 1 ) );
     if ( i2c.read( device_address,  ms5803_rx_data, 3 ) );
-    adc = ms5803_rx_data[2] + (ms5803_rx_data[1]<<8) + (ms5803_rx_data[0]<<16);
+    adc = (unsigned int)ms5803_rx_data[2] + (((unsigned int)ms5803_rx_data[1])<<8) + (((unsigned int)ms5803_rx_data[0])<<16);
     return (adc);
 }
 
@@ -118,13 +118,13 @@
 
     /* calculation according MS5803-01BA data sheet DA5803-01BA_006 */
     dT       = D2 - (C[5]* 256);
-    OFF      = (int64_t)C[2] * (1<<18) + ((int64_t)dT * (int64_t)C[4]) / (1<<5);
-    SENS     = (int64_t)C[1] * (1<<17) + ((int64_t)dT * (int64_t)C[3]) / (1<<6);
-    //OFF      = (int64_t)C[2] * (1<<16) + ((int64_t)dT * (int64_t)C[4]) / (1<<7);
-    //SENS     = (int64_t)C[1] * (1<<15) + ((int64_t)dT * (int64_t)C[3]) / (1<<8);
+ //   OFF      = (int64_t)C[2] * (1<<18) + ((int64_t)dT * (int64_t)C[4]) / (1<<5);
+ //   SENS     = (int64_t)C[1] * (1<<17) + ((int64_t)dT * (int64_t)C[3]) / (1<<6);
+    OFF      = (int64_t)C[2] * (1<<16) + ((int64_t)dT * (int64_t)C[4]) / (1<<7);
+    SENS     = (int64_t)C[1] * (1<<15) + ((int64_t)dT * (int64_t)C[3]) / (1<<8);
 
-    temp     = 2000 + (dT * C[6]) / (1<<23);
+    temp     = 2000 + ((int64_t)dT * C[6]) / (1<<23);
     T_MS5803 = (float) temp / 100.0f;                 // result of temperature in deg C in this var
-    press    = (((int64_t)D1 * SENS) / (1<<21) - OFF) / (1<<15);
-    P_MS5803 = (float) press / 100.0f;                 // result of pressure in mBar in this var
+    press    = ((( (((int64_t)D1)&0xFFFFFFFF) * SENS) / (1<<21) - OFF)) / (1<<15);
+    P_MS5803 = (float)press / 10.;                 // result of pressure in mBar in this var
 }