RTOS/CC2650: RTOS/CC2650: Unexpected CPU Sleep behavior

Naveen Kumar45

Part Number: CC2650
Other Parts Discussed in Thread: TIMAC,

Tool/software: TI-RTOS

Hello Experts,

I am currently working on TIMAC - Power management module for cc2650

IAR Workbench version - 7.40.2.8570, TIMAC - 1.5.2, TIRTOS - 2.11.01.09(For SimpleLink Wireless cc 26xx MCUs this is the latest version).

I have a requirement to wake up the CPU every 5 seconds do its job and sleep, during sleep time i also want to turn off the RF.
I have used the below statements to achieve my requirement.

MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACFalse);
Task_sleep(5Seconds);

However, the call to Task_sleep(5Seconds); is not putting the CPU in sleep mode.
The current drawn during this time(5 seconds) is nearly 12mA and both 32Khz and and 24Mhz oscillators are also on.
hence, i used MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACFalse); additionally to turn off the RF.
Once MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACFalse) is called, CPU is permanently sleeping and not waking up. Both 32Khz and and 24Mhz oscillators are turned off.

Please suggest if there is something wrong with my apporach.

Best regards
--Naveen

over 7 years ago

0 Severin Suveren over 7 years ago

TI__Mastermind 23730 points

Hi Naveen,

You are saying that calling MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACFalse) does not work, but then later saying it does work. Could you please clear the confusion?

0 Naveen Kumar45 over 7 years ago in reply to Severin Suveren

Intellectual 330 points

Hello Edvard,

Calling MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACFalse) followed by Task_sleep(5Seconds) makes CPU to sleep permanently and never wakes up until restart.

If I call only Task_sleep(5Seconds), CPU is not sleeping and both 32Khz and 24Mhz are running.

Thanks

--Naveen

0 Severin Suveren over 7 years ago in reply to Naveen Kumar45

TI__Mastermind 23730 points

Do you remember to call MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACTrue) after the Task_sleep() call?

0 Naveen Kumar45 over 7 years ago in reply to Severin Suveren

Intellectual 330 points

Yes, but not immediately after waking from sleep. I am calling MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACTrue) after few other statements

0 Naveen Kumar45 over 7 years ago in reply to Severin Suveren

Intellectual 330 points

I tried by placing MAC_MlmeSetReq(MAC_RX_ON_WHEN_IDLE, &msa_MACTrue) call immediately after Task_sleep(), still the issue exists.

0 Severin Suveren over 7 years ago in reply to Naveen Kumar45

TI__Mastermind 23730 points

Are you using an FFD or an RFD device?

0 Hector_r over 7 years ago in reply to Severin Suveren

TI__Genius 12415 points

The RFD project should go automatically to sleep. If you want your device to only poll for data every 5 seconds and have the receiver off for the rest of the time then you should modify the value of MSA_WAIT_PERIOD.

If you want to trigger an event in your device every 5 seconds then you should use Clocks to set up a 5 second timer instead of task sleep because that will not guarantee that the device actually goes into low power mode. The task sleep API will just put the current task to sleep and it could cause problems depending on where you are calling this API.

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RTOS/CC2650: RTOS/CC2650: Unexpected CPU Sleep behavior