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-rw-r--r--digital/io-hub/src/guybrush/main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/digital/io-hub/src/guybrush/main.c b/digital/io-hub/src/guybrush/main.c
index 63305103..187585e5 100644
--- a/digital/io-hub/src/guybrush/main.c
+++ b/digital/io-hub/src/guybrush/main.c
@@ -102,6 +102,10 @@ main_init (void)
/* Main timer */
timer_init ();
timer_wait ();
+ /* Send some debug aid in case of TWI synchronisation failure.
+ * If !Z is sent, but not !z, this means that a slave is missing or is not
+ * functioning. */
+ proto_send0 ('Z');
/* TWI communications */
asserv_init ();
mimot_init ();