add comment for pinout

2023-09-08 10:49:26 +02:00 · 2023-09-08 10:49:26 +02:00 · d304b2bc93
parent 7ac3c0db18
commit d304b2bc93
1 changed files with 11 additions and 0 deletions
--- a/main.c
+++ b/main.c
@ -9,6 +9,17 @@
 #include "lib/7segment.h"
 #include "lib/7segment_4digits.h"

+/**
+ *       O O O O O O O O
+ * DDRF  x x x x x x x x
+ *       \-\-\-\-\-\-\-\--- 7 segment output
+ * 
+ *      I I O O O O O O
+ * DDRK x x x x x x x x
+ *      | |     \-\-\-\--- digit selection output
+ *      \-\--------------- Button input
+*/
+
 void main() {
    DDRF  = 0b11111111;
    DDRK  = 0b00001111;