Digital Clock Using Internal RTC of STM32L476

This tutorial guides to making a digital clock at home and can run as long as it is powered by a power source. It uses internal registers of microcontrollers and does not requires external RTC.

Step 1:

Install STM32CUBEMX and Keil With Packages for STM32L476.

Step 2:

Make electronics Interfacing for Your Project. Electronics components needed for this project is:

• 16x2 alphanumeric LCD

• STM32L476 nucleo board

• Bread board

• Jumper wires

• One laptop with windows installed

Connection of LCD and STM32L476 board are mentioned below:

• STM32L476 - LCD

• GND - PIN1

• 5V - PIN2

• NA - 1K resistor connected to GND

• PB10 - RS

• PB11 - RW

• PB2 - EN

• PB12 - D4

• PB13 - D5

• PB14 - D6

• PB15 - D7

• 5V - PIN15

• GND - PIN16

Step 3: Selecting Microcontroller in STM32CUBEMX

Open cubemx and select nucleo64 board with microcontroller as STM32L476.

Step 4: Making Selections in Stm32cubemx.

Make necessary selections in STM32cubemx according to images shown in this tutorial.

Step 6: Press the RESET Button of Board and Find Time and Date Running on Your LCD.