RTOS/MSP432-RTOS: power manager

Zhuhua Wu

Part Number: MSP432-RTOS
Other Parts Discussed in Thread: ENERGYTRACE

Tool/software: TI-RTOS

Hi guys

I am new to msp432 and TI-RTOS (but have designed stuff with msp430 and non-rtos firmware).

So I am playing with this MSP432P401R LaunchPad - Red 2.0 and learning TI-RTOS for a new wifi application. I can't seem to put the device into low power/sleep mode.

Here are what I have done:

In CCS 7 -> Resource Explorer -> Software -> TI-RTOS for MSP430 - v:2.20.00.06 -> MSP432P401R LaunchPad - Red 2.0 -> Driver Examples -> Empty Examples -> Empty Project -> Import to CCS

So I have removed the heartBeatFxn() in the demo.

Here is my power setting:

const PowerMSP432_ConfigV1 PowerMSP432_config = {
    .policyInitFxn = &PowerMSP432_initPolicy,
    .policyFxn = &PowerMSP432_sleepPolicy,
    //.policyFxn = &PowerMSP432_deepSleepPolicy,
    .initialPerfLevel = 1,
    .enablePolicy = true,
    .enablePerf = true,
    .enableParking = true
};

From energy trace and measurement from my meter, I get about 1mA, that's too much current.

So what I am missing here?

Thanks

over 8 years ago

0 Chris Sterzik over 8 years ago

TI__Guru 72971 points

Please check out this post.

e2e.ti.com/.../2096864

Regards,
Chris

0 Zhuhua Wu over 8 years ago in reply to Chris Sterzik

Intellectual 530 points

Hi Chris

I followed the wiki in the post, it doesn't seem to work for me. I have tried with a new typical project and minimal project form the resource explorer, both no luck.

I can see from the GUI config interface, a new HWI is created. And I also test it with a simple led blinking task, every tick is about 250ms, so I believe the WDT is clocking the Clock_tick(). In EnergyTrace, the min current is about 1.6mA.

Anything else I can try?

PS:

TI-RTOS version: 2.20.0.06

XDtools version: 3.32.0.06

CCS v7

0 Chris Sterzik over 8 years ago in reply to Zhuhua Wu

TI__Guru 72971 points

Can you try a different example?

dev.ti.com/.../

Regards,
Chris

0 Zhuhua Wu over 8 years ago in reply to Chris Sterzik

Intellectual 530 points

Hi Chris

As it turned out, it was the debug session of the CCS7 causing the exceed current draw. As I was measuring the current during the debug session with energy trace. It seams the when the debug session is on, it draws about ~1.7mA.

If I measured the current with a meter, no debug session, it measured ~10uA with a regular DDM, which is more reasonable.

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RTOS/MSP432-RTOS: power manager