From c48e4a31ab4a5976156a447b3c59776a8005d8cc Mon Sep 17 00:00:00 2001
From: finga <finga@onders.org>
Date: Sun, 19 Sep 2021 22:14:00 +0200
Subject: [PATCH] Use NULL instead of `strlen` for printing strings

This makes more sense and also removes the dependency for `string.h`.
---
 firmware/src/main.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/firmware/src/main.c b/firmware/src/main.c
index 311f91e..d76bf27 100644
--- a/firmware/src/main.c
+++ b/firmware/src/main.c
@@ -4,7 +4,6 @@
 #include <util/delay.h>
 #include <assert.h>
 #include <stdbool.h>
-#include <string.h>
 
 #define SPI_PORT PORTB
 #define SPI_DDR DDRB
@@ -255,7 +254,7 @@ static void lcd_write_character_page(const char character,
 static void lcd_write_string_page(const char* string,
                                   const uint8_t page,
                                   const bool invert) {
-    for (uint8_t i = 0; i < strlen(string); i++) {
+    for (uint8_t i = 0; string[i] != 0; i++) {
         lcd_write_kerning(2, invert);
         lcd_write_character_page(string[i], page, invert);
     }