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-rw-r--r--[-rwxr-xr-x]cores/arduino/Arduino.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index 3b9ccca..de1886d 100755..100644
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -15,6 +15,8 @@
extern "C"{
#endif
+void yield(void);
+
#define HIGH 0x1
#define LOW 0x0
@@ -149,6 +151,8 @@ extern const uint8_t PROGMEM digital_pin_to_timer_PGM[];
#define NOT_A_PIN 0
#define NOT_A_PORT 0
+#define NOT_AN_INTERRUPT -1
+
#ifdef ARDUINO_MAIN
#define PA 1
#define PB 2