From 677bf2c9b5a3e4fba4b0b4e2f5d3c4d1492dd29b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mario=20H=C3=BCttel?= <mario.huettel@gmx.net>
Date: Mon, 10 May 2021 19:23:43 +0200
Subject: [PATCH] Increase PWM Frequency to ~17 kHz to prevent annoying sound

---
 firmware/main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/firmware/main.c b/firmware/main.c
index 1acd80d..5583453 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -69,8 +69,8 @@ int main(void)
 	TIM14->ARR = 0x00FFu;
 	TIM14->CNT = 0u;
 	TIM14->CCR1 = 0u;
-	/*! -# Set prescaler to 16 ==> ca. 11 KHz */
-	TIM14->PSC = 15u;
+	/*! -# Set prescaler to 11 ==> ca. 17 KHz */
+	TIM14->PSC = 11u - 1u;
 	/*! -# PWM Mode 1 + prefetch */
 	TIM14->CCMR1 = TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1PE;
 	/*! -# Enable Output compare 1 */