CC2640 Battery level monitoring

Chongchun Moon

Intellectual 630 points

Other Parts Discussed in Thread: CC2640

Hi,

CC2640 is used in project currently.

CR1216 coin cell battery is used in my board.

I like to measure battery level by using AONBatMonBatteryVoltageGet().

I expected that it will have some issue with battery level monitoring.

Because, CR1216 has 25 mAh or 34 mAh and it happens voltage drop whenever tx/rx happens.

Images below show voltage drop on my board.

I like to avoid voltage drop timing when i measure battery level monitoring.

So, my idea is that it might be avoided that timing when measuring battery level by using rx_done or tx_done interrupt.

Do you think it is possible? If so, where can i get example for handling rf related interrupt.

If not, How can i resolve this situation? please let me know.

Thanks,

Chongchun Moon

over 9 years ago

0 Sean2 over 9 years ago

TI__Mastermind 33460 points

Hello,

Since you are calling a command from the always on power domain of the processor, you should be able to read when the rest of the processor is sleeping (current consumption is minimum).

0 Chongchun Moon over 9 years ago in reply to Sean2

Intellectual 630 points

Hi Sean2,

Thank you for answering.

That means that calling a command for measuring battery level is not affected by the rest of the processor includes RF core.

Is that correct?

Thanks,

Chongchun Moon.

0 Sean2 over 9 years ago in reply to Chongchun Moon

TI__Mastermind 33460 points

hello Chongchun,

If the processor is sleeping, the AON event fabric is still awake and able to measure the battery level. This would be a good time to measure the level as a connection event is not in progress when the main core is asleep.

0 Chongchun Moon over 9 years ago in reply to Sean2

Intellectual 630 points

Hello Sean2,

I agree with a way what you suggested.

But, I don't know how can i setup AON event fabric, and how can i read a value while process is sleeping.

Can i get any example for doing that?

It will be very helpful.

Thanks,

Chongchun Moon

Bluetooth®︎

Bluetooth forum

CC2640 Battery level monitoring