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-rwxr-xr-xcores/arduino/Arduino.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index bfec943..830c995 100755
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -20,6 +20,7 @@ extern "C"{
#define INPUT 0x0
#define OUTPUT 0x1
+#define INPUT_PULLUP 0x2
#define true 0x1
#define false 0x0