Lower CPU speed if screen is off

CYD-Klipper/src/core/screen_driver.cpp

@@ -100,12 +100,20 @@ void screen_timer_wake()
     lv_timer_reset(screenSleepTimer);
     isScreenInSleep = false;
     set_screen_brightness();
+
+    // Reset cpu freq
+    setCpuFrequencyMhz(CPU_FREQ_HIGH);
+    Serial.printf("CPU Speed: %d MHz\n", ESP.getCpuFreqMHz());
 }
 
 void screen_timer_sleep(lv_timer_t *timer)
 {
     screen_setBrightness(0);
     isScreenInSleep = true;
+
+    // Screen is off, no need to make the cpu run fast, the user won't notice ;)
+    setCpuFrequencyMhz(CPU_FREQ_LOW);
+    Serial.printf("CPU Speed: %d MHz\n", ESP.getCpuFreqMHz());
 }
 
 void screen_timer_setup()

CYD-Klipper/src/core/screen_driver.h

@@ -4,6 +4,9 @@
 #ifndef _SCREEN_DRIVER_INIT
 #define _SCREEN_DRIVER_INIT
 
+#define CPU_FREQ_HIGH 240
+#define CPU_FREQ_LOW 80
+
 #include <XPT2046_Touchscreen.h>
 #include <TFT_eSPI.h>
 

CYD-Klipper/src/main.cpp

@@ -25,7 +25,7 @@ void setup() {
     Serial.println("Screen init done");
     
     wifi_init();
-    ip_setup();
+    ip_init();
     data_setup();
 
     nav_style_setup();

CYD-Klipper/src/ui/ip_setup.cpp

@@ -95,7 +95,7 @@ void ip_setup_inner(){
     lv_keyboard_set_textarea(keyboard, ipEntry);
 }
 
-void ip_setup(){
+void ip_init(){
     connect_ok = false;
 
     if (global_config.ipConfigured && retry_ip_verify()){

CYD-Klipper/src/ui/ip_setup.h

@@ -1 +1 @@
-void ip_setup();
+void ip_init();