False interrupt on SPI

[Shreya J B]

Hi,

I am using nrf52840 and SDK 16.0. I have already used SPI 1 and SPI 2 instances.

Now I am using SPI3 instance. Initially SPI 3 is initialized in non-DMA. and it worked. after some time, I am un-initializing the SPI3 and initializing it with DMA. while initializing, handler is executing.
why Is this so? How to solve this issue?!

Please help me to solve this issue as soon as possible.

Thank you,

Shreya

[Sigurd]

Hi!

It's only the deprecated SPI0,SPI1,SPI2 that are without EasyDMA.

SPIM3 must be used with EasyDMA.

[Shreya J B]

Hi,

we tried using SPI1 instance. even for SPI1 we are getting false interrupt.

currently we are using SPI-DMA with PPI. I have mentioned steps of how we are using SPI3, below

1. SPI initialize in non-DMA

2. PPI initialize

3. SPI un-initialize

4. SPI initialize in DMA 

5. SPI un-initialize

please help us how to solve this issue.

[Sigurd]

Could you show the code you used for uninitializing ?

EDIT: Please try with nRF5 SDK v17.1.0 as well. This might be a the bug mentioned here:

 What are SDK 17.x.0 known issues 

Snippet:

Fixed in SDK 17.0.0:

1. NRF_SPIM_EVENT_END not cleared on uninit in nrfx SPIM driver

[Shreya J B]

Hi Sigurd,

Thanks for the information. It is because of the above mentioned bug. Issue got solved.

Thank you