DS1307

STM32 Low Layer(LL) library. DS1307 serial real-time clock (RTC) is a low power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM.

Features

• Power Supply from 3.3V to 5V DC
• Completely Manages All Timekeeping FunctionsReal-Time Clock Counts:
  • Seconds
  • Minutes
  • Hours
  • Date of the Month
  • Month
  • Day of the Week
  • Year with Leap-Year Compensation Valid Up to 2100
• 56-Byte, Battery-Backed, General-Purpose RAM with Unlimited Writes
• I2C Serial Interface
• Low Power Operation Extends Battery Backup Run Time
• Consumes Less than 500nA in Battery-Backup Mode with Oscillator Running
• Automatic Power-Fail Detect and Switch Circuitry

Add as CPM project dependency

How to add CPM to the project, check the link

CPMAddPackage(
        NAME DS1307
        GITHUB_REPOSITORY ximtech/DS1307
        GIT_TAG origin/main)

Project configuration

1. Start project with STM32CubeMX:
   • I2C configuration
2. Select: Project Manager -> Advanced Settings -> I2C -> LL
3. Generate Code
4. Add sources to project:

add_subdirectory(${STM32_CORE_SOURCE_DIR}/I2C/Polling)  # add I2C dependency

include_directories(${includes} 
        ${DS1307_DIRECTORY})   # source directories

file(GLOB_RECURSE SOURCES ${sources} 
        ${DS1307_SOURCES})    # source files

3. Then Build -> Clean -> Rebuild Project

Wiring

• 

Usage

• Usage example: link