CV184x RTC operationGuide

Revision History

Revision	Date	Description
1.0.0	2025/03/21	Initial version
1.0.1	2026/04/28	Update and optimize the RTC operation guide

Contents

• 1. Disclaimer
• 2. Cvitek RTC Operation Guide
  • 2.1. Module Introduction
    • 2.1.1. Counter Clock Frequency
  • 2.2. Preparation
    • 2.2.1. Using the RTC (Default)
    • 2.2.2. Removing the RTC
  • 2.3. Application-layer Usage
    • 2.3.1. Device Node and Header Files
    • 2.3.2. Common ioctl Commands
    • 2.3.3. rtc_time Structure
  • 2.4. Example Code
    • 2.4.1. User-space Operation Example (rtc_example.c)
  • 2.5. Summary
  • 2.6. Timed Reboot by RTC Interrupt (Soft Reboot)
    • 2.6.1. Procedure
    • 2.6.2. Flow from the RTC Alarm to SoC Reset
    • 2.6.3. Key Points
• 3. RTC Test Commands in Linux
  • 3.1. date and hwclock