Note

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PM Demo

Overview

This sample validates the user-space power-management (PM) interfaces. It supports querying and configuring items such as the governor, profile, thermal-protection threshold, clocks, and power switches.

Source Location

• src/rtsmart/examples/mpp/sample_pm

Build Method

Enable the following options in make menuconfig:

• RT-Smart UserSpace Examples Configuration

• Enable MPP examples

• Enable Build sample_pm

Then rebuild the firmware.

Run Example

cd /sdcard/app/examples/mpp
./sample_pm.elf

The program prints help text:

Usage: sample_pm func_index [opt]

Common Examples

# Query the governor of domain 0
./sample_pm.elf 5 0

# Set domain 0 governor to 1 (PERFORMANCE)
./sample_pm.elf 4 0 1

# Query the profile of domain 0
./sample_pm.elf 7 0

Expected Result

The program prints the current PM configuration or applies the requested setting and then returns the execution result.