Embedded C Programming for STM32 PART – 7

Welcome to another exciting tutorial on embedded systems! 🎉

In this video, I demonstrate how to interface a 4×4 Keypad Matrix and a 16×2 LCD with the STM32F401RETx microcontroller using KEIL µVision for Embedded C programming (without HAL). You’ll learn how to connect the peripherals, configure GPIO pins, write efficient Embedded C code, and simulate the project in Proteus to verify its functionality before implementing it on hardware.

🔧 What You’ll Learn:

Keypad Matrix Interfacing: How to scan a 4×4 keypad for keypresses efficiently.
16×2 LCD Interfacing: Displaying real-time keypress data on the LCD.
GPIO Configuration: Setting up STM32 GPIO pins for both keypad and LCD control.
Embedded C Programming: Writing code to integrate multiple peripherals seamlessly.
Proteus Simulation: Verifying the project setup and functionality virtually.

🛠️ Tools Used:

Microcontroller: STM32F401RETx
IDE: KEIL µVision (without HAL)
Simulation Software: Proteus Design Suite

📁 Resources:

Download the complete project files and Proteus simulation setup here:
https://github.com/shivakayan/Embedded-C-Programming-for-STM32
Find STM32F401RE reference manual here:
https://www.st.com/resource/en/reference_manual/rm0368-stm32f401xbc-and-stm32f401xde-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
LCD Datasheet:
https://bitsavers.trailing-edge.com/components/hitachi/_dataBooks/CE-E573Q_Hitachi_Dot_Matrix_Liquid_Crystal_Display.pdf

📌 Key Features of This Tutorial:

Comprehensive step-by-step guide with clear visuals and detailed explanations.
Live coding demonstration in KEIL µVision (without HAL).
Troubleshooting tips to handle common interfacing issues.
Complete driver development for keypad and LCD integration.

🕒 Timestamps:
00:00 – Introduction
00:24 – Steps for programming STM32
01:28 – Enabling clock to GPIO ports
02:24 – Configuring GPIO pins
05:20 – KeyScan algorithm explanation
06:58 – LCD driver code development
11:07 – Keyscan, final code display
12:46 – Code for LCD driver functions
14:14 – explaining main function
17:30 – Complete code recap
18:16 – Hex File Generation in KEIL µVision
19:15 – Proteus Simulation

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Happy learning and keep innovating! 🚀

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