Smart terminals based on the Taishan School

The expansion board, as analyzed in the project principle analysis,

mainly consists of an interface conversion circuit, a backlight circuit, and an audio circuit. 1.


3.1-inch screen MIPI interface;


2. Taishanpai MIPI screen interface;
 
 


3. Touch interface
; 4. Backlight


circuit: The backlight circuit is divided into two paths: the first path is output from Taishanpai, and the second path is the onboard backlight driver output, selected by four 0-ohm resistors. If (R103 and R104) are attached but (R105 and R106) are not, the Taishanpai backlight circuit provides power; otherwise, (R105 and R106) are attached but (R103 and R104) are not, and the onboard backlight driver circuit provides power.
The 3.1-inch screen used can only support a maximum backlight current of 25mA. Directly connecting it to the screen risks burning it or causing it to overheat. Therefore, we default to not attaching (R103 and R104) and attaching (R105 and R106) to use the onboard backlight driver for power.


5. Other



 
video demonstrations:
The expansion board has been verified to function completely normally.
 
 
 
 
See the attached demonstration video.