mhu/microscope-ring-light
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Increase PWM Frequency to ~17 kHz to prevent annoying sound

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This commit is contained in:
Mario Hüttel 2021-05-10 19:23:43 +02:00
parent 93d15fc549
commit 677bf2c9b5
1 changed files with 2 additions and 2 deletions
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4
firmware/main.c
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@ -69,8 +69,8 @@ int main(void)
TIM14->ARR = 0x00FFu; TIM14->ARR = 0x00FFu;
TIM14->CNT = 0u; TIM14->CNT = 0u;
TIM14->CCR1 = 0u; TIM14->CCR1 = 0u;
/*! -# Set prescaler to 16 ==> ca. 11 KHz */ /*! -# Set prescaler to 11 ==> ca. 17 KHz */
TIM14->PSC = 15u; TIM14->PSC = 11u - 1u;
/*! -# PWM Mode 1 + prefetch */ /*! -# PWM Mode 1 + prefetch */
TIM14->CCMR1 = TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1PE; TIM14->CCMR1 = TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1PE;
/*! -# Enable Output compare 1 */ /*! -# Enable Output compare 1 */