#375

firmware/Makefile

@@ -59,7 +59,7 @@ endif
 # Architecture or project specific options
 #
 
-USE_FPU = hard
+USE_FPU = softfp
 
 # Enables the use of FPU on Cortex-M4 (no, softfp, hard).
 ifeq ($(USE_FPU),)

firmware/controllers/sensors/thermistors.cpp

@@ -140,6 +140,10 @@ void ThermistorMath::prepareThermistorCurve(thermistor_conf_s *tc) {
 
 	float L1 = logf(tc->resistance_1);
 	if (L1 == tc->resistance_1) {
+		/**
+		 * See https://github.com/rusefi/rusefi/issues/375
+		 * See https://sourceforge.net/p/rusefi/tickets/149/
+		 */
 		firmwareError(CUSTOM_ERR_NATURAL_LOGARITHM_ERROR, "Natural logarithm logf() is broken: %f", tc->resistance_1);
 	}
 	float L2 = logf(tc->resistance_2);