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-rw-r--r--cores/arduino/Arduino.h8
-rw-r--r--cores/arduino/wiring_analog.c6
2 files changed, 9 insertions, 5 deletions
diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index e71c9c3..09c1448 100644
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -68,11 +68,11 @@ void yield(void);
#define INTERNAL INTERNAL1V1
#elif defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
#define DEFAULT 0
- #define EXTERNAL 1
- #define INTERNAL1V1 2
+ #define EXTERNAL 4
+ #define INTERNAL1V1 8
#define INTERNAL INTERNAL1V1
- #define INTERNAL2V56 6
- #define INTERNAL2V56_EXTCAP 7
+ #define INTERNAL2V56 9
+ #define INTERNAL2V56_EXTCAP 13
#else
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1284__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644__) || defined(__AVR_ATmega644A__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__)
#define INTERNAL1V1 2
diff --git a/cores/arduino/wiring_analog.c b/cores/arduino/wiring_analog.c
index c545e6d..967c2b9 100644
--- a/cores/arduino/wiring_analog.c
+++ b/cores/arduino/wiring_analog.c
@@ -64,7 +64,11 @@ int analogRead(uint8_t pin)
// channel (low 4 bits). this also sets ADLAR (left-adjust result)
// to 0 (the default).
#if defined(ADMUX)
- ADMUX = ((analog_reference & 0x3) << 6) | ((analog_reference & 0x4) ? 0x10 : 0) | (pin & 0x07);
+#if defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
+ ADMUX = (analog_reference << 4) | (pin & 0x07);
+#else
+ ADMUX = (analog_reference << 6) | (pin & 0x07);
+#endif
#endif
// without a delay, we seem to read from the wrong channel