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Diffstat (limited to 'components/drivers/include/rtdevice.h')
-rw-r--r--components/drivers/include/rtdevice.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/components/drivers/include/rtdevice.h b/components/drivers/include/rtdevice.h
index 60d4dc1e8a..8ed9f34ca4 100644
--- a/components/drivers/include/rtdevice.h
+++ b/components/drivers/include/rtdevice.h
@@ -114,6 +114,8 @@ struct rt_pipe_device
struct rt_portal_device *read_portal;
};
+#define PIPE_CTRL_GET_SPACE 0x14 /**< get the remaining size of a pipe device */
+
#define RT_DATAQUEUE_EVENT_UNKNOWN 0x00
#define RT_DATAQUEUE_EVENT_POP 0x01
#define RT_DATAQUEUE_EVENT_PUSH 0x02