Pause and resume PPI

Hello,

I don't know what API you are currently using to set up the PPI. I guess you are either writing to some bare metal registers manually, or you are using some PPI API. 

If you are using the registers directly, then you are probably enabling the PPI using the CHENSET register to enable the PPI channel. Then you can use the CHENCLR register to disable that same channel(s).

If you are using some API, then you are probably using something like: nrf_drv_ppi_channel_enable() (or an equivalent using the softdevice API). In that case, look for a function called nrf_drv_ppi_channel_disable() (or the equivalent softdevice API version). 

Then, when you are done with the custom SPI operations, you can enable the PPI channel like you did when you first set it up. The configuration will probably still be the same, so you just need to enable the channel(s).

Best regards,

Edvin

Thanks for the reply.

I am using the API to set up the PPI. A part of the programme is shown below.

(Program overview)

Triggered by the reception of an ESB, the GPI outputs a total of 10 pulses, 9 PWM and 1 'GPIOE' via the PPI.
I input those 10 pulses to another GPIO port and trigger that GPIOE input to run the SPI via PPI.

What I want to do is to stop the sequence of these pulses when a certain condition is met, and run the SPI at an arbitrary timing, and when that condition is lifted, restart the above sequence again.
When the condition is lifted, the above sequence is restarted again.

(Pause)
Question (1).
I am aware that the API includes xxx_event_enable, xxx_task_enable, xxx_channel_enable, etc.
To stop the system at once, do I need to disable all events, tasks and channels using the API?

Question (2).
Are there any other APIs to be executed other than disable?

(Resume)
Question (3).
To restart PPI, is it sufficient to enable event, task and channel using the API?
If so, should the order in which they are enabled be as in the above programe?

Hi
By executing 'nrf_drv_ppi_channel_disable()' for each configured PPI channel, PPI could be stopped and SPI could be controlled at any time PPI

PPI operation could also be restarted by reconfiguring PPI with the above programme.

Thank you very much for your advice.

Hi
By executing 'nrf_drv_ppi_channel_disable()' for each configured PPI channel, PPI could be stopped and SPI could be controlled at any time PPI

PPI operation could also be restarted by reconfiguring PPI with the above programme.

Thank you very much for your advice.