tftDriver

Everyone needs a display screen. 7-pin or 8-pin TFT screen modules sold online are not cheap, but screens without a driver board are very cheap. We should save money wherever possible.
On the other hand, the pins of the screen will affect the space. Theoretically, soldering is the most space-saving method, but the soldering is really bad, so we can only use FPC connectors.
 
Before making this, I was intimidated by TFT driver boards. I had previously made a driver board for a transparent screen, but failed when boosting to 12V. Various TFT screens online, even those based on SPI communication, have numerous pin configurations: 10-pin, 12-pin, 14-pin...
I honestly couldn't understand the differences. Making this driver board was purely to verify the circuit's versatility, and I encountered countless pitfalls.
Let me talk about those pitfalls:
1. The pinout is reversed. I'm used to using a flip-flop FPC, but its pinout is reversed compared to the screen's. Therefore, it's best to prepare two types of FPC connectors: both top and bottom connectors. This way, it can still be used even with reversed pinouts.
2. This design shares power with the MCU. Consider a separate step-down power supply to avoid affecting MCU stability.
3. The screen's FPC cables have different orientations; the connection side might be reversed compared to the display side. It's recommended to buy the screen first; consider the placement of the FPC socket based on the length of the FPC cables.