From 84b8207531f442acb9fc81fed44d875f36ef3cfc Mon Sep 17 00:00:00 2001
From: Drath <drath@drath.cc>
Date: Mon, 28 Sep 2026 21:25:21 +0200
Subject: [PATCH] peroper backlight set func

---
 include/lcd.h | 3 ++-
 src/lcd.c     | 9 ++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/lcd.h b/include/lcd.h
index 15eef14..a63911b 100644
--- a/include/lcd.h
+++ b/include/lcd.h
@@ -22,6 +22,7 @@ void lcd_close(struct lcd_t *lcd);
 void lcd_clear(struct lcd_t *lcd);
 void lcd_set_contrast(struct lcd_t *lcd, uint8_t contrast);
 void lcd_set_backlight(struct lcd_t *lcd, bool enabled);
+void lcd_set_brightness(struct lcd_t *lcd, uint8_t brightness);
 void lcd_set_cursor(struct lcd_t *lcd, uint8_t row, uint8_t col);
 void lcd_set_custom_char(struct lcd_t *lcd, uint8_t index, const lcd_glyph_t *glyph);
 void lcd_write_buf(struct lcd_t *lcd, uint8_t row, uint8_t col, const char *str);
@@ -31,4 +32,4 @@ void lcd_flush_buf(struct lcd_t *lcd);
 char lcd_bar(struct lcd_t *lcd, uint8_t char_id, double value);
 int lcd_init(struct lcd_t *lcd);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/lcd.c b/src/lcd.c
index ea924a9..ba6aabc 100644
--- a/src/lcd.c
+++ b/src/lcd.c
@@ -2,6 +2,7 @@
 #include "log.h"
 #include <fcntl.h>
 #include <stdarg.h>
+#include <stdint.h>
 #include <string.h>
 #include <termios.h>
 #include <unistd.h>
@@ -58,6 +59,12 @@ void lcd_set_backlight(struct lcd_t *lcd, const bool enabled) {
 	lcd_write(lcd, cmdbuf, enabled ? 3 : 2);
 }
 
+void lcd_set_brightness(struct lcd_t *lcd, const uint8_t brightness) {
+    applog(LOG_INF, "Set backlight brightness to %d", brightness);
+    const uint8_t cmdbuf[] = {0xFE, 152, brightness};
+    lcd_write(lcd, cmdbuf, 3);
+}
+
 void lcd_set_cursor(struct lcd_t *lcd, const uint8_t row, const uint8_t col) {
 	const uint8_t cmdbuf[] = {0xFE, 71, col + 1, row + 1};
 	lcd_write(lcd, cmdbuf, sizeof(cmdbuf));
@@ -138,4 +145,4 @@ int lcd_init(struct lcd_t *lcd) {
 
 	lcd_clear(lcd);
 	return 0;
-}
\ No newline at end of file
+}