Are TWI manager implemented low power features?

RE: Are TWI manager implemented low power features?

Jørgen Holmefjord — Mon, 13 Aug 2018 08:27:14 GMT

I do not understand how your comment relates to the content of this question.

The SDK is provided without any warranty, and you as a developer is always responsible to modify, test, and make sure the SDK examples and components work as expected in your product. We do our best to provide an SDK that work as described, and which include helpful modules that customers can use to avoid rewriting every piece of software in their product.

RE: Are TWI manager implemented low power features?

Elkana — Wed, 08 Aug 2018 06:31:28 GMT

Excuse me, but this answer is just not enough.

Of course the developer can do it himself, but this is why you implemented an SDK and on top of it managers - so the developer will not have to implement stuff like enabling and disabling peripherals, debug it, maintain it and so on.

RE: Are TWI manager implemented low power features?

Jakub Rzeszutko — Mon, 15 Jan 2018 06:39:48 GMT

If there are still some transactions waiting in the queue you shall not uninit transaction manager. There are two functions indicating if there is still some data to send: nrf_twi_mngr_is_idle and nrf_spi_mngr_is_idle. If they are returning true you can uninit particular manager, but you need to initialize it again once you want to send new data.

RE: Are TWI manager implemented low power features?

aircheese — Fri, 12 Jan 2018 14:23:03 GMT

Thanks for you info. I had look at them, for these uninits in managers, yes they do turn off both. My concern is if I need to share the TWI, then I should not uninit the manager in every end of operation like reading data from one sensor. I am running a RTOS with it. Sensors are reading with different updating frequency in different task. That is why i am using managers to share the hardware resources. Am I right on here, I am not very sure.

RE: Are TWI manager implemented low power features?

Jakub Rzeszutko — Fri, 12 Jan 2018 14:04:59 GMT

Just had a brief look at functions: nrf_spi_mngr_uninit and nrf_twi_mngr_uninit they seem to disable SPI and TWI peripherals respectively.