LCD

[中文]

1. Function Overview

To facilitate the verification of the LCD display function, a series of CLI commands have been designed, mainly including the on/off control of the JPEG pipeline decoding and the LCD display.

2. Code Path

Path: ap/components/multimedia/cli/media_cli.c

3. Introduction to CLI Commands

The supported commands are as follows:

1. lcd open

   • Function Description

     Used to test opening the selected LCD and decoding the camera images for display on the screen.

   • Command Format

     lcd open param1 [param2] [param3] [param4]

   Param	value
   param1	fb/line, indicate decode jpeg frame by complete frame or by 16 lines
   param2	lcd device name, optional param, default “st7792”
   param3	lcd device resolution, optional param, default “PPI_480X272”
   param4	rotate degree, optional param, default 0

   • Test Case

     Test decoding the JPEG images output by the UVC line - by - line, rotating them by 90°, and displaying them on the ST7701SN screen: lcd open fb st7701sn 90

2. lcd close

   • Function Description

     Used to test turning off the decoding and display functions.

   • Command Format

     lcd close

   • No parameters

   • Test Case

     Turn off decoding and display: lcd close