STM32F407vet6 uses FSMC to drive LCD screen

My method is also very simple. Experts please don't criticize me.

     First of all, you need to understand the basic principle of FSMC, that is, how to use it, how to configure it, and why it can be used in this way. You can refer to the reference manual of STM32F4 for this. I won't go into details here. (Actually, I don't understand it very well .)

      I used the screen of the Wildfire development board because I wanted to directly transplant the program provided by the development board. (This is the only thing a novice can do) Because the smallest system board I bought is a 100-pin package, there are some minor problems in using it. I searched a lot on the Internet about how to drive LCD with FSMC on a 100-pin board, but I didn't find a suitable answer. Since I have better luck and have adjusted it, I will share it. Even if it can't help others who see it, at least it can give some comfort to those who encounter the same problem as me! Adjust it slowly, it can be adjusted!

The FSMC data lines D0-D15 are also available in the 100 package. Just connect them directly. (Refer to the definition of the IO port in the data manual) The power ground and other things are also available. The backlight pin can be defined by yourself. This depends on personal preference. At the end of LCD initialization, the backlight is turned on. Mine is low level effective. The reset signal is the same as the backlight. The CS signal is defined as PG12 in the FSMC. Obviously, there is no CS, but CS is the chip select signal. Since I am using this screen, there is no need to control which one is selected. Just make it always selected. Of course, it is theoretically possible to control it yourself with a pin. (I haven't tried it) The most critical thing is the LCD-DC signal. The method of use is to connect it to the address line of the FSMC. The 100 package also has several address lines. Calculate the RAM address according to the selected address line.

Just provide a small idea. Because I don't have a good grasp of it, let's learn together.