CTL_STATUS_t pca9532_set_led_mode(PCA9532_DRIVER_t *self, int index, PCA9532_OUTPUT_MODE_t mode);
pca9532_set_led_mode writes the mode of LED index to mode which can be used to set the LED to blink.
pca9532_set_led_mode returns a standard status code.
pca9532_set_led_mode is thread-safe if a mutex is associated with the I2C bus bus.