Half Second Timer needed - read GPIO for every Half second

[TVNAIDU]

Need to add smal pioece of code to read GPIO for every Half second code, any timer I can invoke from task to read fro every Half-second?.

appreciated.

[admin]

For interval of half a second, 32-bit timer needs to be used.

Alternatively, you can count the OS ticks (the default is 50 ms).

[TVNAIDU]

Thanks, can I crwate a separate task for this, in main function in for loop, can I use tk_sleep for Half second, that way, task collects data for every Half second.

task_main_fn()

{

      for(; {

       collect GPIO data and do process....

      tk_sleep(half-second);

      }

}

[admin]

Yes, it is the simplest solution: the dedicated task, which reads and processes GPIO and then sleeps for half a second.

[TVNAIDU · Accepted solution]

Thanks Yevgeni. appreciated.

[TVNAIDU]

Hi Yevgeni:

I have to take 840 samples per second, if I keep for loop for 840 then if I keep tk_sleep, not sure when it finishes, for example I have to measure 24 receptacles instantaneous current and voltage for 840 samples per second, is there any way I can measure makesure 840 samples can take within one second, can I use times to happen 840 samples per second exactly without putting task in sleep using tk_sleep?

[admin]

TVNAIDU,

let discuss sampling the analog values in the separate thread.

Coukd you, please, open the new thread with the descriptive name?

[TVNAIDU]

Yes yevgenit, I opened another thread "Sampling of Analog values". Please take a look.

thanks.