1 files changed, 12 insertions, 5 deletions
diff --git a/software/hhd70dongle/util.c b/software/hhd70dongle/util.c
index 2c358fa..56fe575 100644
--- a/software/hhd70dongle/util.c
+++ b/software/hhd70dongle/util.c
@@ -70,19 +70,26 @@ void reset(void)
   #endif 
 }
 
+//not switchin off adc produces slightly besser results
+void adc_on(void)
+{
+    ADCSRA = (1<<ADEN) | 0b00000111;                // enable ADC, Prescaler 1:128
+}
+
+void adc_off(void)
+{
+    ADCSRA &= ~(1<<ADEN);                           // disable ADC -> save power
+}
+
+
 uint8_t adc_read(uint8_t mux)
 {
     ADCSRB = (mux & 0x20);                          // select input 
     ADMUX = 0b11100000 | (mux & 0x1F);              // select input cont'd
                                                     // select internal 2.56V reference,
                                                     // result is left justified
-    ADCSRA = (1<<ADEN) | 0b00000111;                // enable ADC, Prescaler 1:128
-
     ADCSRA |= (1<<ADSC);                            // start the conversion
     while (ADCSRA & (1<<ADSC)) ;                    // wait for result
-
-    ADCSRA &= ~(1<<ADEN);                           // disable ADC -> save power
-
     return ADCH;
 }