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-rw-r--r--libmaple/usb/usb.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libmaple/usb/usb.h b/libmaple/usb/usb.h
index 92f606c..c724c54 100644
--- a/libmaple/usb/usb.h
+++ b/libmaple/usb/usb.h
@@ -74,7 +74,7 @@ void usbWaitReset(void);
/* blocking functions for send/receive */
void usbBlockingSendByte(char ch);
-uint32 usbSendBytes(uint8* sendBuf,uint32 len);
+uint32 usbSendBytes(const uint8* sendBuf,uint32 len);
uint32 usbBytesAvailable(void);
uint32 usbReceiveBytes(uint8* recvBuf, uint32 len);
uint8 usbGetDTR(void);