IO: Add a 100ms timeout to I2C to allow communication with Arduino

Note this currently does not include the compiled binary for linux-arm64
processing · ethaniel0 · Mar 16, 2018 · Mar 16, 2018 · Apr 18, 2018 · Apr 18, 2018
commit 657ce8542c6f5dbe5a39d961d6b19aa73e8ef9c5
diff --git a/java/libraries/io/library/linux-armv6hf/libprocessing-io.so b/java/libraries/io/library/linux-armv6hf/libprocessing-io.so
diff --git a/java/libraries/io/library/linux32/libprocessing-io.so b/java/libraries/io/library/linux32/libprocessing-io.so
diff --git a/java/libraries/io/library/linux64/libprocessing-io.so b/java/libraries/io/library/linux64/libprocessing-io.so
diff --git a/java/libraries/io/src/native/impl.c b/java/libraries/io/src/native/impl.c
@@ -323,6 +323,9 @@ JNIEXPORT jint JNICALL Java_processing_io_NativeInterface_transferI2c
 		packets.nmsgs++;
 	}
 
+	// set the timeout to 100ms - this helps slow devices such as the
+	// Arduino Uno to keep up
+	ioctl(handle, I2C_TIMEOUT, 10);
 	int ret = ioctl(handle, I2C_RDWR, &packets);
 	if (ret < 0) {
 		ret = -errno;