Power LPDS/Idle mode Entry and Exit

Table of Contents

• Introduction
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

This example demonstrates usage of Radar Power Management Framework for getting into Low Power Deep Sleep(LPDS) or Idle3 states.

Supported Combinations

Parameter	Value
CPU + OS	m4fss0-0 freertos
Toolchain	ti-arm-clang
Boards	xWRL1432-evm
Example folder	examples/drivers/power/power_modes

Steps to Run the Example

• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run
• Open serial terminal (like Tera Term etc.). Example allows the user to either enter LPDS or Idle3 state via command line options.
  
• LPDS: Entering '1', will make the chip to get to LPDS state for 50 seconds (time can be configured by changing the macro in example file).
• Idle: Entering '2', will make the chip to get to Idle3 state for 25 seconds (time can be configured by changing the macro in example file).
• LPDS wakeup:
  • LPDS wakeup after 50 seconds using Sleep Counter.
  • LPDS wakeup using SYNC_IO is supported. To use this, switch 1.6 has to be configured off. Pressing USER_SW switch (S3) will cause LDPS exit.
  • LPDS wakeup using SPI CS is supported. To use this, switch 1.6 has to be configured on. connecting SPI CS to ground will cause LPDS exit.
  • Example doesn't support wakeup using UART and RTC.
• Idle3 wakeup: exit after 25 seconds using RTI timer interrupt mapped to WIC.

See Also

POWER

Sample Output

Shown below is a sample output when the application is run,