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-rw-r--r--protocol/serial.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/protocol/serial.h b/protocol/serial.h
index bd071bec9..96913c867 100644
--- a/protocol/serial.h
+++ b/protocol/serial.h
@@ -41,6 +41,7 @@ POSSIBILITY OF SUCH DAMAGE.
/* host role */
void serial_init(void);
uint8_t serial_recv(void);
+int16_t serial_recv2(void);
void serial_send(uint8_t data);
#endif