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-rw-r--r--src/common/tusb_types.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/common/tusb_types.h b/src/common/tusb_types.h
index 5ab15aa3c..2b4ceb69c 100644
--- a/src/common/tusb_types.h
+++ b/src/common/tusb_types.h
@@ -48,7 +48,8 @@ typedef enum
{
TUSB_SPEED_FULL = 0,
TUSB_SPEED_LOW ,
- TUSB_SPEED_HIGH
+ TUSB_SPEED_HIGH,
+ TUSB_SPEED_INVALID = 0xff,
}tusb_speed_t;
/// defined base on USB Specs Endpoint's bmAttributes