Скачать или смотреть One STM32, Three LCDs — Proteus Simulation that Actually Works

For Help with any embedded system or engineering related task
Want to run multiple LCDs from a single STM32 without magic libraries or guesswork? In this video I show a practical, step‑by‑step workflow to simulate three different displays in Proteus, wire them correctly, and drive them from the same microcontroller project. You’ll see a classic 16×2 HD44780 character LCD (4‑bit parallel), a 128×64 graphic LCD (KS0108‑style), and a 2.2–2.4" TFT (ILI9341/ST7735 class) running side‑by‑side. By the end, you’ll know how to pick the right bus (Parallel vs I²C expander vs SPI), map pins in STM32CubeMX, generate HAL code, and verify everything in Proteus before you ever solder a header.

What you’ll learn
How to organize a multi‑display STM32 project with CubeMX profiles and HAL drivers.

Correct pin mapping for HD44780 (RS, EN, D4–D7) and how to free up GPIO with an I²C PCF8574 backpack.

Hooking up a 128×64 GLCD (E, RW, DI/RS, CS1/CS2) and drawing pixels, lines, and text to both halves.

Driving a color TFT over SPI (ILI9341/ST7735): init sequence, MADCTL orientation, and simple frame‑rate tips.

Timing gotchas: EN pulse width, busy‑flag vs delays, SPI clock limits, and display update scheduling to avoid flicker.

Proteus setup: adding STM32, LCD models, virtual logic analyzer, and using signal probes to debug.

Clean project structure: separate lcd_char.c, glcd.c, and tft_spi.c with shared fonts and draw calls.

Why simulate first?
Proteus lets you catch the easy‑to‑miss issues like wrong RS/EN polarity, mismatched chip selects, or SPI speed too high for your display model. You’ll see my troubleshooting checklist:

Nothing on the 16×2? Check contrast (VO), RS state, and ensure 4‑bit nibbles are sent high‑then‑low.

GLCD shows only half? CS1/CS2 mapping swapped or page/column addressing off by one.

TFT white screen? Reset pin not toggled long enough or SPI mode mismatch (CPOL/CPHA).

Project flow (chapters)
0:00 Intro & goals
1:18 Proteus project setup + libraries
3:40 CubeMX pinout for 3 displays
6:05 HD44780 4‑bit driver + Hello World
9:20 GLCD pages, fonts & drawing primitives
14:10 SPI TFT init (ILI9341/ST7735) + color test
18:25 Coordinating updates: timers & non‑blocking writes
22:10 Debugging in Proteus: logic analyzer & probes
25:00 Wrap‑up + next steps (hardware port)

Files & resources
• STM32CubeIDE project + headers (link)
• Proteus schematic (.pdsprj) with displays (link)
• Font bitmaps + example graphics (link)
• Hackster.io write‑up (link)

Call to action
If this helped, like, subscribe, and drop a comment with your exact LCD model so I can add support in the next video. Want a hardware build version with real scope captures? Type “DO THE HARDWARE BUILD” below.

Gear / software
STM32F103/STM32F401 (any STM32 with enough GPIO works), Proteus 8.x, STM32CubeIDE or Keil uVision, PCF8574 backpack (optional).

Hashtags
#STM32 #Proteus #EmbeddedSystems #LCD #TFT #SPI #I2C #Electronics

#EduEngTeam
#Embedded Systems
Arduino, PIC Microcontroller, Raspberry Pi and embedded systems microcontrollers tutorials courses and tips
Educational Engineering Team
-------------------
Educational Engineering Team Channel