From ffddf9a9b3a3dc12fcc3be4cc0faf533339519fe Mon Sep 17 00:00:00 2001
From: Armel FAUVEAU <armel.fauveau@globalis-ms.com>
Date: Sun, 8 Mar 2026 00:17:33 +0100
Subject: [PATCH] Increase PWM frequency to suppress audio interference (issue
 #195)

---
 App/driver/backlight.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/App/driver/backlight.c b/App/driver/backlight.c
index ce3f20c2..2614f550 100644
--- a/App/driver/backlight.c
+++ b/App/driver/backlight.c
@@ -31,7 +31,7 @@
     #include "misc.h"
 #endif
 
-#define PWM_FREQ 320
+#define PWM_FREQ 4000
 #define DUTY_CYCLE_LEVELS 64
 
 #define DUTY_CYCLE_ON_VALUE GPIO_PIN_MASK(GPIO_PIN_BACKLIGHT)