CC2541 Low Power Timer

Mark Ackerson

Other Parts Discussed in Thread: CC2541

Customer has a project using the CC2541. They need to track elapsed seconds since power up. Easy enough with one of the hardware timers. Trick is that this device is battery powered, so they want to take advantage of the low power modes. Would the sleep timer running in PM2 be the best option?

Thanks,

Mark

over 10 years ago

0 Willis1 over 10 years ago

TI__Genius 17975 points

Yes. The sleep timer is abstracted through the OSAL timer, so what you can do is set an OSAL timer that triggers once every 60s and then increment a counter each time to log how many minutes have elapsed. The power management driver is built into OSAL and will automatically bring the chip in and out of PM2 sleep as required.

0 YiKai Chen over 10 years ago

Guru 735685 points

You can try those APIs in OSAL_ClockBLE.c.

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CC2541 Low Power Timer