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Merge pull request #4454 from haukepetersen/fix_stm32f4_pwmfreq

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cpu/stm32f4discovery: fixed freq return in pwm_init
This commit is contained in:
Andreas "Paul" Pauli 2015-12-10 23:40:00 +01:00
commit 26eeb9f544
1 changed files with 2 additions and 0 deletions
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cpu/stm32f4/periph/pwm.c
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@ -120,6 +120,8 @@ int pwm_init(pwm_t dev, pwm_mode_t mode, unsigned int frequency, unsigned int re
} }
tim->PSC = (pwm_clk / (resolution * frequency)) - 1; tim->PSC = (pwm_clk / (resolution * frequency)) - 1;
tim->ARR = resolution - 1; tim->ARR = resolution - 1;
/* calculate the actual PWM frequency */
frequency = (pwm_clk / (resolution * (tim->PSC + 1)));
/* set PWM mode */ /* set PWM mode */
switch (mode) { switch (mode) {