Hi James,
Callouts are perfect for this type of function. I’d recommend
multiplexing this within the task context you are running out of.
Essentially the logic works like:
- Turn the LED on
- Set a callout for 1 second to turn the LED back off
If your task is waiting on an event queue, it will process that event in
one second.
More information on callouts and event queues can be found here:
- Tutorial on using these:
http://mynewt.apache.org/os/tutorials/event_queue/
- Callouts: http://mynewt.apache.org/os/core_os/callout/callout/
- Event Queues:
http://mynewt.apache.org/os/core_os/event_queue/event_queue/
You don’t need to add a specific task for the LED function, you can
just multiplex it as an event. If you want to create a separate task
(so that it has higher priority, or doesn’t block/isn’t blocked by
other functions), you can.
Sterling
On 28 May 2016, at 14:39, James Howarth wrote:
Hi,
I want to be able to flash an LED on for ~1 second when some condition
occurs. I don't want this to be flashing all the time like the blinky
example.
What's the right way to add a task that runs only once? Or should I
not be
using a task at all for this?
Cheers
James
