fix missing prototype warnings

1 files changed, 12 insertions, 5 deletions

diff --git a/watch-library/watch/watch_private.h b/watch-library/watch/watch_private.h
index 8045e438..7bb91d1f 100644
--- a/watch-library/watch/watch_private.h
+++ b/watch-library/watch/watch_private.h
@@ -27,17 +27,24 @@
 #include "watch.h"
 
 /// Called by main.c while setting up the app. You should not call this from your app.
-void _watch_init();
+void _watch_init(void);
 
 /// Initializes the real-time clock peripheral.
-void _watch_rtc_init();
+void _watch_rtc_init(void);
 
 /// Called by buzzer and LED setup functions. You should not call this from your app.
-void _watch_enable_tcc();
+void _watch_enable_tcc(void);
 
 /// Called by buzzer and LED teardown functions. You should not call this from your app.
-void _watch_disable_tcc();
+void _watch_disable_tcc(void);
 
 /// Called by main.c if plugged in to USB. You should not call this from your app.
-void _watch_enable_usb();
+void _watch_enable_usb(void);
+
+// this function ends up getting called by printf to log stuff to the USB console.
+int _write(int file, char *ptr, int len);
+
+// this method could be overridden to read stuff from the USB console? but no need rn.
+int _read(void);
+
 #endif