CC2640 UART With Power Saving

Ming Leung50

Other Parts Discussed in Thread: CC2640

I followed the CC2640 NPI UART echo example in this wiki. It works when power saving is disabled, but not when power saving is enabled. In the wiki, there is a note said: "You should disable POWER_SAVINGS in the preprocessor if the host does not support the MRDY and SRDY signaling protocol for low power UART operation within the BLE stack running on top of TI-RTOS." Where is MRDY/SDRY signalling protocol defined and how to make it work under power saving mode?

over 10 years ago

0 YiKai Chen over 10 years ago

Guru 735695 points

CC26XX UART cannot work under power saving mode. However, you can try to use sensor controller in CC26xx to serve your purpose. You can install Sensor Controller Studio from www.ti.com/.../cc2650dk and have a look at the UART Emulator example in it.

0 Ming Leung50 over 10 years ago in reply to YiKai Chen

Intellectual 720 points

Just found this new post in the wiki. It said power management can be done with UART (and SPI) but need to follow the MRDY/SRDY handshake protocol. It has a logic capture section to describe the protocol but the one for UART with PM is yet to be post.

0 YiKai Chen over 10 years ago in reply to Ming Leung50

Guru 735695 points

MRDY and SRDY pins comprises a “handshake” process to guarantee both devices are awake and ready to send and/or receive data.

0 Tim C over 10 years ago in reply to YiKai Chen

TI__Mastermind 34660 points

Hello Ming. You're correct! UART with PM is possible using the MRDY / SRDY handshaking. We will try to have that wiki page updated for UART with PM by the end of next week.

0 Ming Leung50 over 10 years ago in reply to Tim C

Intellectual 720 points

Tim,

Thanks for the confirmation. I look forward to the update of the post

../ming

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CC2640 UART With Power Saving