1 files changed, 6 insertions, 0 deletions
diff --git a/src/testapp1/morse.h b/src/testapp1/morse.h
index 68cebb1..b2c78db 100644
--- a/src/testapp1/morse.h
+++ b/src/testapp1/morse.h
@@ -3,7 +3,13 @@
 
 #define DIT_DURATION 100 // ms
 
+// Transmit a string or a single char in morse code.
+//
+// Supported range:
+// All ASCII between '+' and '\', which includes
+// numerals and capital letters.
 void morse(char* text);
+void morse_char(char letter);
 
 void dah(void);
 void dit(void);