0.1.8 Fix #109 incorrect constants

libraries/MS5611/MS5611.cpp

@@ -2,11 +2,12 @@
 //    FILE: MS5611.cpp
 //  AUTHOR: Rob Tillaart
 //          Erni - testing/fixes
-// VERSION: 0.1.7
+// VERSION: 0.1.8
 // PURPOSE: MS5611 Temperature & Humidity library for Arduino
 //     URL:
 //
 // HISTORY:
+// 0.1.8  fix #109 incorrect constants (thanks to flauth)
 // 0.1.7  revert double to float (issue 33)
 // 0.1.6  2015-07-12 refactor
 // 0.1.05 moved 6 float multiplies to init  [adds ~70 bytes !!!]
@@ -92,15 +93,16 @@ int MS5611::read(uint8_t bits)
   float sens = C[1] + dT * C[3];
 
   // SECOND ORDER COMPENSATION - PAGE 8/20
-  // COMMENT OUT < 20 CORRECTION IF NOT NEEDED
-  if (_temperature < 20)
+  // COMMENT OUT < 2000 CORRECTION IF NOT NEEDED
+  // NOTE TEMPERATURE IS IN 0.01 C
+  if (_temperature < 2000)
   {
     float T2 = dT * dT * 4.6566128731E-10;
     float t = _temperature - 2000;
     float offset2 = 2.5 * t * t;
     float sens2 = 1.25 * t * t * t;
-    // COMMENT OUT < -15 CORRECTION IF NOT NEEDED
-    if (_temperature < -15)
+    // COMMENT OUT < -1500 CORRECTION IF NOT NEEDED
+    if (_temperature < -1500)
     {
       t = _temperature + 1500;
       t = t * t;

libraries/MS5611/MS5611.h

@@ -2,7 +2,7 @@
 //    FILE: MS5611.h
 //  AUTHOR: Rob Tillaart
 //          Erni - testing/fixes
-// VERSION: 0.1.7
+// VERSION: 0.1.8
 // PURPOSE: MS5611 Temperature & Pressure library for Arduino
 //     URL:
 //
@@ -19,7 +19,7 @@
 #include <Arduino.h>
 #endif
 
-#define MS5611_LIB_VERSION (F("0.1.7"))
+#define MS5611_LIB_VERSION (F("0.1.8"))
 
 #define MS5611_READ_OK  0
 

libraries/MS5611/library.json

@@ -18,7 +18,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/Arduino.git"
   },
-  "version":"0.1.7",
+  "version":"0.1.8",
   "frameworks": "arduino",
   "platforms": "*",
   "export": {

libraries/MS5611/library.properties

@@ -1,5 +1,5 @@
 name=MS5611
-version=0.1.7
+version=0.1.8
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Experimental library for MS5611 Temperature & Pressure for Arduino.

libraries/MS5611/todo.txt

@@ -0,0 +1,77 @@
+
+http://forum.arduino.cc/index.php?topic=272402.msg1923962#new
+
+TODO's
+- none
+DHT11 blauwe testen ....
+
+DONE
+======================
+- there are many delay()'s still in the library and these should be removed if possible or at least minimized.
+- the PRE1.0 Arduino support needs still to be implemented. Or removed completely.
+- test test test test test and ....
+
+Remark Erni
+============
+int64_t offset = (unsigned long)C[2] * 65536L + (C[4] * dT ) / 128L;
+
+
+OPtimiize
+============
+  uint16_t C[8] = { 80, 53513, 56427, 32594, 31335, 31612, 27894, 45785};
+  uint32_t D1 = 7909856L;
+  uint32_t D2 = 8246240L;
+  
+  
+  int32_t dT = D2 - C[5] * 256L;
+  int32_t temp = 2000 + (dT * C[6])/8388608L;
+
+  int64_t offset = C[2] * 65536L+ (C[4] * dT ) / 128L;
+  int64_t sens = C[1] * 32768L + (C[3] * dT ) / 256L;
+  int32_t P = ((D1 * sens)/2097152L - offset) / 32768L;
+  
+  
+  Port open
+MS5611 test version: 0.0.00
+reset:	0
+0	50	80
+0	D109	53513
+0	DC6B	56427
+0	7F52	32594
+0	7A67	31335
+0	7B7C	31612
+0	6CF6	27894
+0	B2D9	45785
+convD1:	0
+7909856
+convD2:	0
+8246240
+
+
+float is 40% faster 168 versus 296 == 130 uSec.
+test sketch size, RAM
+int64 => 7220, 476
+float => 6522, 476
+
+==> scheelt 700 bytes.
+
+
+  dT = D2 - C[5] * 256L;
+  int16_t T2 = 2000 + (dT * C[6]) /8388608L;
+
+  float offset2 = C[2] * 65536.0 + (C[4] * dT ) / 128.0;
+  float sens2 = C[1] * 32768.0 + (C[3] * dT ) / 256.0;
+  uint32_t P2 = ((D1 * sens2)/2097152.0 - offset2) / 32768.0;
+  
+
+Start 
+296
+153568
+1999
+89177
+
+168
+153568
+1999
+89177
+