81  * Apply the Callendar-Van Dusen equation to convert the RTD resistance
87  * @param resistance measured resistance
88  * @param resistance_0 constant resistance at 0oC
91 static double calculate_temperature(double resistance, double resistance_0)  in calculate_temperature()  argument
94 	double delta = (RTD_A * RTD_A) - 4 * RTD_B * (1.0 - resistance / resistance_0);  in calculate_temperature()
100 	resistance /= resistance_0;  in calculate_temperature()
101 	resistance *= 100.0;  in calculate_temperature()
102 	temperature = RTD_C[0] + RTD_C[1] * resistance + RTD_C[2] * pow(resistance, 2) -  in calculate_temperature()
103 		      RTD_C[3] * pow(resistance, 3) - RTD_C[4] * pow(resistance, 4) +  in calculate_temperature()
104 		      RTD_C[5] * pow(resistance, 5);  in calculate_temperature()
112  * resistance to temperature:
113  * @param resistance measured resistance
114  * @param resistance_0 constant resistance at 0oC
117 static double calculate_temperature(double resistance, double resistance_0)  in calculate_temperature()  argument
121 	temperature = (resistance - resistance_0) / (resistance_0 * RTD_A);  in calculate_temperature()
215 	/* Read resistance measured value */  in max31865_get_temperature()
236 	double resistance = (double)read_reg.u16;  in max31865_get_temperature()  local
238 	resistance /= 32768;  in max31865_get_temperature()
239 	resistance *= config->resistance_reference;  in max31865_get_temperature()
240 	data->temperature = calculate_temperature(resistance, config->resistance_at_zero);  in max31865_get_temperature()