From f263787f071f0f0e55cb3ba400262bc6aed231e9 Mon Sep 17 00:00:00 2001
From: RudolphRiedel <31180093+RudolphRiedel@users.noreply.github.com>
Date: Wed, 22 Apr 2020 23:47:29 +0200
Subject: [PATCH] Fix ExtUI 0<brightness<12 (#17644)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>
---
 .../ftdi_eve_touch_ui/screens/interface_settings_screen.cpp   | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp
index 401a1298c6..d893518275 100644
--- a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp
+++ b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp
@@ -157,9 +157,7 @@ void InterfaceSettingsScreen::onIdle() {
     CommandProcessor cmd;
     switch (cmd.track_tag(value)) {
       case 2:
-        screen_data.InterfaceSettingsScreen.brightness = float(value) * 128 / 0xFFFF;
-        if (screen_data.InterfaceSettingsScreen.brightness > 1)
-          screen_data.InterfaceSettingsScreen.brightness = 1;
+        screen_data.InterfaceSettingsScreen.brightness = constrain((value * 128UL) / 0xFFFF, 1, 11);
         CLCD::set_brightness(screen_data.InterfaceSettingsScreen.brightness);
         SaveSettingsDialogBox::settingsChanged();
         break;