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

gohai · gohai · commit 0bb5b77328d7 · 2018-07-01T10:05:03.000-07:00
Note this currently does not include the compiled binary for linux-arm64
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;

Original file line number	Diff line number	Diff line change
`@@ -323,6 +323,9 @@ JNIEXPORT jint JNICALL Java_processing_io_NativeInterface_transferI2c`
`323`	`323`	`packets.nmsgs++;`
`324`	`324`	`}`
`325`	`325`
	`326`	`+ // set the timeout to 100ms - this helps slow devices such as the`
	`327`	`+ // Arduino Uno to keep up`
	`328`	`+ ioctl(handle, I2C_TIMEOUT, 10);`
`326`	`329`	`int ret = ioctl(handle, I2C_RDWR, &packets);`
`327`	`330`	`if (ret < 0) {`
`328`	`331`	`ret = -errno;`