Configuration register 1 for channel 4
| DUTY_SCALE | This register is used to configure the changing step scale of duty on channel %s. |
| DUTY_CYCLE | The duty will change every LEDC_DUTY_CYCLE_CH%s on channel %s. |
| DUTY_NUM | This register is used to control the number of times the duty cycle will be changed. |
| DUTY_INC | This register is used to increase or decrease the duty of output signal on channel %s. 1: Increase; 0: Decrease. |
| DUTY_START | Other configured fields in LEDC_CH%s_CONF1_REG will start to take effect when this bit is set to 1. |