Revision 1:608e890e88e7, committed 2016-08-28

Comitter:

Wosser1sProductions

Date:

Sun Aug 28 23:28:03 2016 +0000

Parent:

0:373de0f4d5cd

Commit message:

Fixed calibration values not being stored correctly.

Changed in this revision

--- a/BMP180.cpp	Fri Aug 26 00:19:21 2016 +0000
+++ b/BMP180.cpp	Sun Aug 28 23:28:03 2016 +0000
@@ -38,12 +38,12 @@
 
     // Pre-calc
     ac1 = ac1 << 2;
-    mc  = mc  << 11;
+    mc  = (0xFFFF0000 | mc) << 11; // D1F6 << 11 == 0xFE8FB000 niet 0X68FB000
 
     return errors == 0; // 0 = ACK = success
 }
 
-int BMP180::ReadData(float& pTemperature, float& pPressure) {
+int BMP180::readData(float& pTemperature, float& pPressure) {
     long t, p;
 
     if (!ReadRawTemperature(&t) || !ReadRawPressure(&p))
@@ -104,12 +104,12 @@
 
 float BMP180::TrueTemperature(long ut) {
     // straight out from the documentation
+
     x1 = ((ut - ac6) * ac5) >> 15;
-    x2 = mc / (x1 + md);
-    b5 = x1 + x2;
+    b5 = x1 + (mc / (x1 + md));
 
     // convert to Celsius
-    return (long)((b5 + 8) >> 4) / 10.F;
+    return ((b5 + 8) >> 4) / 10.F;
 }
 
 float BMP180::TruePressure(long up) {

--- a/BMP180.h	Fri Aug 26 00:19:21 2016 +0000
+++ b/BMP180.h	Sun Aug 28 23:28:03 2016 +0000
@@ -8,8 +8,10 @@
 
 #include "mbed.h"
 
-///  default address is 0xEF => (0x77<<1) ?
+///  default address is 0xEF => (0x77<<1 + 1)
 #define BMP180_I2C_ADDRESS  0xEF
+#define DEGREES             '\u00B0'
+#define DEGREES_CELCIUS     "\u00B0C"
 
 // Oversampling settings
 typedef enum {
@@ -65,7 +67,7 @@
          *   1 on success,
          *   0 on error
          */
-        int ReadData(float& pTemperature, float& pPressure);
+        int readData(float& pTemperature, float& pPressure);
 
     protected:
         /** Perform temperature measurement
@@ -96,10 +98,10 @@
         I2C m_i2c;
         char m_data[2];
 
-        short ac1, ac2, ac3, b1, b2, md;
         //short mb; // Not used?
-        unsigned short ac4, ac5, ac6;
-        long x1, x2, x3, b3, b5, b6, mc;
+        uint16_t ac4, ac5, ac6;
+        int16_t ac1, ac2, ac3, b1, b2, b5, md;
+        long x1, x2, x3, b3, b6, mc;
         unsigned long b4, b7;
 };