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-rw-r--r--protocol/adb.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/protocol/adb.c b/protocol/adb.c
index a4783f36e5..f57afac937 100644
--- a/protocol/adb.c
+++ b/protocol/adb.c
@@ -128,6 +128,10 @@ uint16_t adb_host_kbd_recv(void)
attention();
send_byte(0x2C); // Addr:Keyboard(0010), Cmd:Talk(11), Register0(00)
place_bit0(); // Stopbit(0)
+ if (!wait_data_hi(500)) { // Service Request(310us Adjustable Keyboard): just ignored
+ sei();
+ return -30; // something wrong
+ }
if (!wait_data_lo(500)) { // Tlt/Stop to Start(140-260us)
sei();
return 0; // No data to send