fix(temperature)!:wrong return type & fix temperature calculate formula

-change return type from uint8_t to float
-improve calculation formula

temperature/temperature.c

@@ -27,33 +27,44 @@
 
  @return  The temperature, in celsius format
 */
-static inline uint8_t _TEMPERATURE_Calculate_Celsius(uint16_t ui16ADC_voltage) {
+static float TEMPERATURE_Calculate(uint16_t ui16ADC_voltage) {
 
     // T = 27 - (ADC_voltage - 0.706)/0.001721
     // The given above formula according to the RP2040 datasheet
 
-    return 27 - (ui16ADC_voltage - 0.706) / 0.001721;
+    const float fConversionFactor = 3.3f / (1 << 12);
+
+    float fADC = (float)(ui16ADC_voltage) * fConversionFactor;
+    float fTemperatureC = 27.0f - (fADC - 0.706f) / 0.001721f;
+
+    return fTemperatureC;
 
 }
 
 
 void TEMPERATURE_Init(void) {
 
-    // Initialize onboard temperature sensor
-    adc_gpio_init(TEMPERATURE_GPIO_PIN);
+    // Initialize gpio
+    gpio_init(TEMPERATURE_GPIO_PIN);
+
+    // Initialize hardware AD converter
+    adc_init();
+
+    // Enable onboard temperature sensor
+    adc_set_temp_sensor_enabled(true);
 
     // Set onboard temperature sensor as ADC
     adc_select_input(TEMPERATURE_ADC_PIN);
 
 }
 
-uint8_t TEMPERATURE_Read(void) {
+float TEMPERATURE_Read(void) {
 
-    uint8_t ui8TemperatureCelsius;
+    float ui8TemperatureCelsius;
 
     uint16_t ui16ADC_voltage = adc_read();
 
-    ui8TemperatureCelsius = _TEMPERATURE_Calculate_Celsius(ui16ADC_voltage);
+    ui8TemperatureCelsius = TEMPERATURE_Calculate(ui16ADC_voltage);
 
     return ui8TemperatureCelsius;
 }

temperature/temperature.h

@@ -45,4 +45,4 @@ void TEMPERATURE_Init(void);
 
  @return  The data, read from sensor
 */
-uint8_t TEMPERATURE_Read(void);
+float TEMPERATURE_Read(void);