Split calc_ADC_temp() to distinct functions

calc_ADC_temp_reduced_div(), fixed point math to reduce divisions
calc_ADC_temp_int(), normal integer math
calc_ADC_temp_float(), floating point math

They return HAL status, results are passed as arguments.

Formatted adc.c

Author: Manwlis

code/CM7/.cproject

@@ -25,6 +25,7 @@
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+							<option id="com.st.stm32cube.ide.mcu.gnu.managedbuild.option.nanoprintffloat.755208181" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.option.nanoprintffloat" value="true" valueType="boolean"/>
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code/CM7/Core/Inc/adc.h

@@ -48,7 +48,9 @@ void MX_ADC3_Init(void);
 
 /* USER CODE BEGIN Prototypes */
 void start_ADC_DMA();
-void calc_ADC_temp();
+HAL_StatusTypeDef calc_ADC_temp_reduced_div( int64_t* const result );
+HAL_StatusTypeDef calc_ADC_temp_int( int64_t* const result );
+HAL_StatusTypeDef calc_ADC_temp_float( float* const result );
 
 /* USER CODE END Prototypes */