Internal Temperature calculation using TS_CAL2 and reference temperature stored in User Data Option Byte.

adcmain.c

@@ -6,6 +6,9 @@
 
 #define RAW
 
+#define TS_CAL2 ((const short *) 0x1FFFF7C2)
+#define USER0   ((const unsigned char *) 0x1FFFF804)
+
 int main( void) {
     unsigned last = 0 ;
     short calV, calC ;
@@ -14,6 +17,12 @@ int main( void) {
     adc_vnt( VNT_INIT, &calV, &calC) ;
 #ifdef RAW
     printf( "%u, %u\n", calV, calC) ;
+
+    int baseC = 300 ;
+# ifdef USER0
+    if( 0xFF == (USER0[ 0] ^ USER0[ 1]))
+        baseC = USER0[ 0] * 10 ;
+# endif
 #endif
 
     for( ;;)
@@ -26,8 +35,12 @@ int main( void) {
 #ifdef RAW
             adc_vnt( VNT_RAW, &Vsample, &Csample) ;
             printf( "%i, %i, %i, %i, ", calV, Vsample, calC, Csample) ;
-			Csample = 300 + (calC - (int) Csample * calV / Vsample)
-																* 10000 / 5336 ;
+            Csample = baseC + (calC - (int) Csample * calV / Vsample)
+# ifdef TS_CAL2
+                                                    * 800 / (calC - *TS_CAL2) ;
+# else
+                                                                * 10000 / 5336 ;
+# endif
             Vsample = 330 * calV / Vsample ;
 #else
             adc_vnt( VNT_VNC, &Vsample, &Csample) ;