Bit dazzed on how to stop SPI module in the middle of transaction

[AimHigh]

Hi,

Good Day!

Statement of Problem: We are using SPI to transfer data to custom LED matrix which uses HT1632C led driver. For strings more than 7 character length we used scroll effect to display the message (frames are moved from right to left at 180mSec). The problem is if user chooses to read the device status when a long message is being displayed on the screen, then user request is not displayed on the screen. 

Query: Is it possible to stop the SPI transaction  in the middle(especially for this long messages)? so that a new interrupt can be processed. If it possible, how it can be done? 

FI, app_timer is used in the application for scroll effect. Let me know if further information is needed

Thank you,

Aim High.

[Turbo J]

AimHigh said:

that a new interrupt can be processed

Interrupts on NRF5x (aka ARM Cortex-M) are preemptible.

So once you set your priorites correctly, the SPI interrupt can be preempted by the app_timer interrupt handler at any time.

We would need to look at your source code why there is no "long" message displayed.

[AimHigh]

Hi Tubro,

I can share the source code in private. Can you set this under private mode?