CTL_STATUS_t pca9532_set_pwm_frequency(PCA9532_DRIVER_t *self, int channel, float frequency);
pca9532_set_pwm_frequency sets the PWM frequency of channel channel of the LED driver self to frequency hertz. channel is 0 or 1 to select between the two channels.
pca9532_set_pwm_frequency returns a standard status code.
pca9532_set_pwm_frequency is thread-safe if a mutex is associated with the I2C bus bus.