Design of multi display terminal driver for embedded system based on FSMC bus

In order to integrate the advantages of digital display and TFT-LCD, and further enrich the teaching cases of embedded system, a multi display terminal experimental device of embedded system based on FMSC bus is designed. The hardware design uses Bank1. Sector4 of FSMC bus to connect to LCD, FSMC interface is directly connected to LCD data, control signal, and the 8080 timing of LCD is generated by FSMC controller. The digital display multiplexes the data line with LCD through the latch, and the reverse phase of FSMC bus Bank1. Sector3 chip selection signal is used as the gating signal of the digital display. The software design completes FSMC initialization with the help of STM32CubeMX, realizes the digital display and LCD bottom driver, and transplants LCD basic display and high-level application. The running test shows that the system runs stably and reliably, the display effect is clear and smooth, and the software and hardware design is greatly simplified. It provides a classic case for the parallel expansion of multi display terminals in embedded system.