[Lichuang Development Board] Liangshan School Game Console

Game console introduction: Make a simple game console based on the Liangshan School development board. 1. Most of the hardware design IO refers to the official circuit IO port, so if there is a problem, you only need to check the hardware problem. (1) Power management circuit (4) The joystick module
uses ADC acquisition to control the direction of the joystick.
       The rest of the circuit can refer to other more excellent projects.
 
2. Summary of Problems
     Since it was my first time to do such a project, including board making, welding, etc., I encountered many problems during the process.
     Again, due to the rush of time, some things were not made, such as the motor was not purchased and the suitable speaker was not found.
Here I list the problems I encountered and how to solve them.
     1. Soldering problem:
          If you have the ability, it is best to use solder paste and a heating table. Remember to prepare tweezers.
           Because of my limited ability, I used a soldering iron to solder all the components this time,
           which caused me to have many problems with soldering. For example, it was difficult to solder small resistors, and plastic components were easy to burn out during soldering. I also burned my hands many times~
           But in the end I finally finished welding the thing. I didn’t know how to do anything. My hands were shaking when I held the tweezers at the beginning, but now my hands are not shaking so much. Haha~
           First of all, you must prepare tweezers when soldering small things. Of course, you can use a heating table, solder paste, etc. Don't use a soldering iron to solder one by one like me.
    2. To troubleshoot the problem
           , remember to prepare a multimeter and make a connection to troubleshoot the problem.
            It is also a derivative of the previous question. Due to the welding technology, I burned out the "protagonist", the Liangshan faction. I have been troubleshooting the problem for a long time and have never been able to figure out what is going on.
           When I put everything together After everything is soldered, plug it in. Even if the screen doesn't light up, a small chip on the Liangshan pie is directly burned. Okay, let’s start~
           Haha, of course not, I then checked that thing was a voltage conversion module. The reason why the screen did not light up was because this thing was burned.
           Why did it burn? It turns out that when I was soldering, I scratched the green oil on the solder mask, causing 3v3 to be directly connected to GND, causing the chip to burn. The problem was finally discovered using a multimeter.
    3. Learn to check the data sheet.
            When you are faced with many components and even need a magnifying glass to see them, some things require pin definitions. We need to know which ones are positive and negative, otherwise problems may suddenly appear. .
     The working voltage and many parameters of the components can be checked, as well as typical applications. Of course, most of them may be in English, but in fact, you only need to look at certain parameters.
 
     There are also some minor problems, such as ADC conversion, the direction of the joystick is different, and the direction of the ADC may also be different, otherwise the knob will be reversed.
   
     Finally, due to time constraints and many problems, although things were not perfect, I still learned a lot. In fact, the most important thing is the method to solve the problem. If you encounter problems, you can ask more experts who know these things. Problems can be solved faster.