Diff: ntc_10k_44031.cpp

Revision:

1:f65f6fadda5d

Child:

2:bcfa5a2f21c9

diff -r 0a70b5780991 -r f65f6fadda5d ntc_10k_44031.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ntc_10k_44031.cpp	Mon Feb 22 05:08:54 2021 +0000
@@ -0,0 +1,86 @@
+/*!
+ *****************************************************************************
+  @file:  ntc_10k_44031.cpp
+
+  @brief: This file contains functionality for 10K NTC 44021 model
+
+  @details:
+ -----------------------------------------------------------------------------
+ Copyright (c) 2021 Analog Devices, Inc.  All rights reserved.
+
+ This software is proprietary to Analog Devices, Inc. and its licensors.
+ By using this software you agree to the terms of the associated
+ Analog Devices Software License Agreement.
+
+*****************************************************************************/
+
+#include <math.h>
+#include "thermistor.h"
+#include "ntc_10k_44031.h"
+
+#ifdef DEFINE_LOOKUP_TABLES
+/* 10K NTC look-up table. Values are resistance in ohm for temperature
+ * range from -10 to 80C with +/-1C tolerance.
+ * @note This function uses Steinhart-Hart equation for deriving look-up table.
+**/
+const uint32_t ntc_10k_44031rc::lut[] = {
+	47561,	45285,	43131,	41091,	39158,	37327,	35591,	33946,	32385,
+	30905,	29500,	28166,	26900,	25697,	24555,	23470,	22438,	21457,
+	20524,	19637,	18792,	17989,	17224,	16495,	15801,	15140,	14510,
+	13910,	13337,	12791,	12271,	11774,	11299,	10847,	10414,	10002,
+	9607,	9231,	8870,	8526,	8197,	7882,	7581,	7293,	7018,
+	6754,	6501,	6259,	6028,	5806,	5593,	5389,	5194,	5006,
+	4827,	4654,	4489,	4331,	4178,	4032,	3892,	3757,	3628,
+	3503,	3384,	3269,	3159,	3053,	2951,	2852,	2758,	2667,
+	2580,	2496,	2415,	2337,	2262,	2189,	2120,	2053,	1988,
+	1926,	1866,	1808,	1752,	1698,	1646,	1596,	1548,	1501,
+	1456
+};
+#endif
+
+
+/*!
+ * @brief	This is a constructor for ntc_10k_44031rc class
+ * @return	none
+ */
+ntc_10k_44031rc::ntc_10k_44031rc()
+{
+	/* Coefficients of Steinhart-Hart equation for 10K NTC to convert
+	 * NTC resistance into equivalent temperature */
+	ntc_10k_44031rc::coeff_A = 1.032*pow(10, -3);
+	ntc_10k_44031rc::coeff_B = 2.387*pow(10, -4);
+	ntc_10k_44031rc::coeff_C = 1.580*pow(10, -7);
+
+#ifdef DEFINE_LOOKUP_TABLES
+	ntc_10k_44031rc::lut_offset = -10;	/* Min temperature obtained through LUT */
+	ntc_10k_44031rc::lut_size = 90;		/* Temperature range defined in LUT
+										   [lut_offset : lut_size - lut_offset] */
+#endif
+}
+
+
+/*!
+ * @brief	Convert the thermistor resistance into equivalent temperature using
+ *			Steinhart-Hart equation for 10K 44031 NTC
+ * @param	resistance[in] - thermistor resistance
+ * @return	Thermistor temperature value
+ */
+float ntc_10k_44031rc::convert(const float resistance)
+{
+	return thermistor::convert(resistance, coeff_A, coeff_B, coeff_C);
+}
+
+
+#ifdef DEFINE_LOOKUP_TABLES
+/*!
+ * @brief	Convert the thermistor resistance into equivalent temperature using
+ *			lookup table for 10K 44031 NTC
+ * @param	resistance[in] - thermistor resistance
+ * @return	Thermistor temperature value
+ */
+float ntc_10k_44031rc::lookup(const float resistance)
+{
+	return thermistor::lookup(lut, resistance, lut_size, lut_offset);
+}
+#endif
+