SPC582B SPI synchronous behaviour during ISR

[FPros.1]

Hi all,

I am using SPC582B mcu.

The system timer is based on PIT0 CH0 (default choice) at frequency 1kHz.

In the timer IRQ handler, I need to invoke SPI spi_lld_exchange API.

Problem is this API doesn't complete, remaining stuck on the while

SPC5_SPI_WAIT_FOR_TXRX_COMPLETION(spip); 

SPI APIs are configured synchronous:

I already activated the preemptable ISR option in the configuration:

Since I don't know if the priority level is ascending or not, I tried both priority situations, that is: 

System timer (PIT0 CH0) priority: 4                    DSPI0 priority: 10

System timer (PIT0 CH0) priority: 10                  DSPI0 priority:4 

Is these some configuration flag or API to call in order to make this SPI API working?

Thank you all for any help or indication,

FP

[FPros.1 · Accepted solution]

My routine was called inside in a critical section so I just needed to exit temporarily such region (as it was performed in the AutoDevKit SPSB081 example) in order to make the SPI synchronous APIs work.

Regards,

FP