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Added int_frac function for configuring PWM (#768)

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ZodiusInfuser 2022-05-03 17:54:46 +01:00 committed by GitHub
parent 8d43364cfb
commit 01290c4cb3
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1 changed files with 16 additions and 0 deletions
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src/rp2_common/hardware_pwm/include/hardware/pwm.h
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@ -134,6 +134,22 @@ static inline void pwm_config_set_clkdiv_int(pwm_config *c, uint div) {
c->div = div << PWM_CH0_DIV_INT_LSB; c->div = div << PWM_CH0_DIV_INT_LSB;
} }
/** \brief Set PWM clock divider in a PWM configuration using an 8:4 fractional value
* \ingroup hardware_pwm
*
* \param c PWM configuration struct to modify
* \param integer 8 bit integer part of the clock divider. Must be greater than or equal to 1.
* \param fract 4 bit fractional part of the clock divider
*
* If the divide mode is free-running, the PWM counter runs at clk_sys / div.
* Otherwise, the divider reduces the rate of events seen on the B pin input (level or edge)
* before passing them on to the PWM counter.
*/
static inline void pwm_config_set_clkdiv_int_frac(pwm_config *c, uint8_t integer, uint8_t fract) {
valid_params_if(PWM, fract < 16);
c->div = (((uint)integer) << PWM_CH0_DIV_INT_LSB) | (((uint)fract) << PWM_CH0_DIV_FRAC_LSB);
}
/** \brief Set PWM counting mode in a PWM configuration /** \brief Set PWM counting mode in a PWM configuration
* \ingroup hardware_pwm * \ingroup hardware_pwm
* *