GPIO_REG_WRITE(GPIO_PIN_ADDR(GPIO_ID_PIN(pin_num[channel])),GPIO_REG_READ(GPIO_PIN_ADDR(GPIO_ID_PIN(pin_num[channel])))&(~GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE)));//disable open drain;
GPIO_REG_WRITE(GPIO_PIN_ADDR(GPIO_ID_PIN(pin_num[channel])),GPIO_REG_READ(GPIO_PIN_ADDR(GPIO_ID_PIN(pin_num[channel])))&(~GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE)));//disable open drain;