add calculating code

prosjekt.X/main.c

@@ -12,6 +12,42 @@
 #include "uart.h"
 #include <util/delay.h>
 
+#define R_t0 10000
+#define T_0 298.15
+#define B 3950
+#define R_1 1000
+
+float R_therm;
+float V_1;
+float ln; 
+float T_therm;
+float V_therm;
+
+// Takes inn messured value 
+// Calculates the temperature in celcius
+// Returns the themperature
+float calculate_thermistor_temp(float readValue){
+    uint8_t V_tot = 5;
+    // Calculate Voltage over thermistor
+    V_therm = (V_tot/1024)*readValue;
+    
+    // Voltage accross R_1
+    V_1 = V_tot - V_therm; 
+    
+    // Calculate Thermistor resistanse
+    R_therm = (V_therm)/ (V_1 / R_1);
+    
+    // Steinhart-Harts formula
+    ln = log(R_therm/R_t0);
+    T_therm = (1/ ((ln/B) + (1/T_0)));
+    
+    // Temperatur in celcius
+    T_therm -= 273.15;
+    
+    return T_therm;
+}
+
+
 int main() {
     init_uart((uint16_t)9600);
     stdout = &USART_stream;

prosjekt.X/nbproject/configurations.xml

@@ -15,6 +15,7 @@
                    projectFiles="true">
       <itemPath>main.c</itemPath>
       <itemPath>uart.c</itemPath>
+      <itemPath>thermistor-temp.c</itemPath>
     </logicalFolder>
     <logicalFolder name="ExternalFiles"
                    displayName="Important Files"

prosjekt.X/themistor-temp.h

@@ -0,0 +1,23 @@
+/* 
+ * File:   themistor-temp.h
+ * Author: athamantis
+ *
+ * Created on 08 March 2024, 11:46
+ */
+
+#ifndef THEMISTOR_TEMP_H
+#define	THEMISTOR_TEMP_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* THEMISTOR_TEMP_H */
+

prosjekt.X/thermistor-temp.c

@@ -0,0 +1 @@
+