HGKeeper

4cbb8e61e4b9

Added description for backlight dimmer and buzzer function blocks.

rt_task_delete(&UART_task);

rt_task_join(&UART_task);

closeserial(UART_fd);

gpio_close(RS485_GPIO_dev);

rt_mutex_delete(&UART_WriteMutex);

rt_mutex_delete(&UART_ReadMutex);