S32K144EVB-Q100 LPSPI communication fail in button interrupt (IRQ)

[Kavin-Sun]

LPSPI not working  in  button interrupt (IRQ) using  S32K144

Hi everyone, 

I tried SPI communication in button interrupt handler.

But, it was not working. 

Hardware :    S32K144EVB-Q100 

Software :      lpspi_transfer_s32k144  (S32DS Project Example) 

                       --> Modified SW3 button interrupt function. 

1) Firstly, I use S32DS sample example. 

2) I attached 'button PTC13 interrupt ' 

In main( ) function , it is good working.

But, after when I push button SW3 , SPI was not work interrupt function in buttonISR(void). 

I attached software source. 

Please help me!. 

Thanks very much. 

[Robin_Shen · Accepted solution]

By debug your project, I find that it stuck at OSIF_SemaWait. The OSIF_SemaWait using interrupt of Systick, but the interrupt of Systick was pending.

Would you please configure the priority of PORTC(your button isr) or Systick. So that the interrupt of Systick is able to run.
For example: 
INT_SYS_SetPriority(PORTC_IRQn,1);

By the way:
The Interrupt service routing should be a small non-blocking code, but you have a master blocking transfer function in your handler.
I would recommend to use interruption, or a flag in the handler of the interrupt to signal a new transfer.

Best Regards,
Robin
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[Kavin-Sun]

Dear Robin_Shen

Thanks a lot !!!

It was work if I add below line. 

"I would recommend to use interruption, or a flag in the handler of the interrupt to signal a new transfer."--> I understand your recommend. I will do it. 

Have good day.!