delete duplicate arm_math.h and fix doxygen docu for adc_meas

stm-firmware/include/adc-meas.h

@@ -3,11 +3,29 @@
 
 #include <stdbool.h>
 #include <stdint.h>
-
+/**
+ * @brief Moving average filter coefficient for PT1000 measurement
+ */
 #define ADC_PT1000_FILTER_WEIGHT 0.005f
 
+/**
+ * @brief ADC channel number of PT1000 sensor input
+ */
+#define ADC_PT1000_CHANNEL 2
+
+/**
+ * @brief Lower value for valid input range for PT1000 measurement
+ *
+ * If the input of the PT1000 sensor is below this value, an error is thrown. This is used to disable the temperature control loop
+ */
 #define ADC_PT1000_LOWER_WATCHDOG 100
-#define ADC_PT1000_HIGHER_WATCHDOG 4000
+
+/**
+ * @brief Upper value for valid input range for PT1000 measurement
+ *
+ * If the input of the PT1000 sensor is above this value, an error is thrown. This is used to disable the temperature control loop
+ */
+#define ADC_PT1000_UPPER_WATCHDOG 4000
 
 enum adc_p1000_error {ADC_PT1000_NO_ERR= 0, ADC_PT1000_WATCHDOG_ERROR=-1, ADC_PT1000_OVERFLOW=2};
 
@@ -39,7 +57,7 @@ void adc_pt1000_set_moving_average_filter_param(float alpha);
  * @brief Set the calibration data for the PT1000 measurement
  *
  * The resulting resistance reading is
- * \f$R_{corrected} = \sigma R_{raw} + O\f$
+ * \f$R_{corrected} = (1 + \sigma) R_{raw} + O\f$
  *
  * @param offset Offset \f$O\f$
  * @param sensitivity_deviation Sensitivity Deviation \f$\sigma\f$ after offset correction