CCS/CC1350: CC1350 Power management

- Have you tried to run the empty example from the SDK as is? 

- Please post a picture of your setup to avoid any misunderstandings about the setup. 

Hi,

I reply to you

1. I have just run now the example as it is (as I downloaded from the SDK).

2. You see the pictures in the annex

Best regards

Mario

Did you disconnect the LED when you did the measurement since the LED will be on 50 % of the time in this example. 

Hi,

the LEDs are not connected in the condition I showed you in my pictures I sent on Friday.

I removed the jumpers.

Power supply is 3.3V

The running code is

void *mainThread(void *arg0)
{
PIN_State pinState;
PIN_Handle hPin;
uint32_t currentOutputVal;
uint32_t standbyDuration = 5;

/* Shut down external flash on LaunchPads. It is powered on by default
* but can be shut down through SPI
*/
#ifdef Board_shutDownExtFlash
Board_shutDownExtFlash();
#endif

/* Allocate LED pins */
hPin = PIN_open(&pinState, LedPinTable);

/*
* Repeatedly sleeps for a duration, to allow repeated entry/exit
* from standby. The LED states are toggled on each iteration
*/
while(1) {
/* Sleep, to let the power policy transition the device to standby */
sleep(standbyDuration);

/* Read current output value for all pins */
currentOutputVal = PIN_getPortOutputValue(hPin);

/* Toggle the LEDs, configuring all LEDs at once */
PIN_setPortOutputValue(hPin, ~currentOutputVal);
}
}

Best Regards,

Mario Sandri

The code you show is not from the "empty" example (http://dev.ti.com/tirex/explore/node?node=AA144sanlSFU2AxOkTvJbw__eCfARaV__LATEST) which I asked if you had run without changes.

When I ask about a picture it's to see if the measurement setup is correct. If the measurement was done with the jumpers to the LEDs removed it would have been helpful if the picture reflected that. This to ensure that the relevant details are highlighted. 

Hi Mario,

I would also recommend that you read this application note on how to measure the current consumption: www.ti.com/.../swra478

Regards,
Fredrik

The GPTimer requires that the chip is not in standby to run and hence can't be used in this case.

You can try to use the clock module as one potential solution:

#include <ti/sysbios/knl/Clock.h>

.

#define WAKEUPFREQUENCY 10 // 10 Hz

.

   while(1){
        <task code>
        Task_sleep((1000000/WAKEUPFREQUENCY) / Clock_tickPeriod);
    }

Hi Fredrik,

thank you, good to know.

Regards

Mario

Hi MARIO SANDRI,

Could you mention what is the magnitude of low current you were able to observe? I too I am trying to observe the same on LAUNCHXL-CC1310

Thanks in advance

-Chandrasekhar DVS

Hi TER,

Does using Task_sleep() or sleep() puts the device in standby mode? I am currently doing the following in processConfigRequest() (sensor.c)

-> I am using ApiMac_mlmeSetReqBool(ApiMac_attribute_RxOnWhenIdle, false) followed by 

Ssf_setReadingClock(reportingInterval); so that until an event is triggered. So instead of using these one after another, can I simply use

sleep(sleepinterval);

Ssf_setReadingClock(reportingInterval - sleepinterval); //To account for the time slept. assuming this function does not work if the device is sleeping during it's call. I think this is what you were implying in the post I am replying to.

Or simply

sleep(sleepinterval);

Ssf_setReadingClock(reportingInterval); //This is assuming that the timeout would trigger event that would bring device out of sleep

Can you help me here?

Thanks in advance

-Chandrasekhar DVS

Yes TER.

Then we will follow up on on the other E2E post. Please don't double post.

Ok thanks