When I put the code of DSPI-send into the STM interrupt, the DSPI communication cannot be sent.

[Hanry]

Question description

    When I put the code of DSPI send in the While loop, the DSPI communication sends normally. But when I put the code into the STM interrupt, the DSPI communication cannot be sent.

In While loop:

In STM interrupt:

The program is stuck in this function:

The program is attached below.

Don't know what the problem is. Thank you for your help.

[PetrS]

Hi,

try to increase interrupt priority for used DSPI module.

BR, Petr

[Hanry]

Thanks for your direction. But how to increase interrupt priority for used DSPI module?

Looking forward to your specific guidance.

[PetrS]

Hi,

use

DSPI_MasterSetDelay(DSPI0_INSTANCE, 1, 1, 1);
INT_SYS_SetPriority(DSPI0_TxFifoNotfull_IRQn,5);
INT_SYS_SetPriority(DSPI0_RxFifoNotempty_IRQn,5);

BR, Petr

[Hanry]

Thanks for your direction. Best wishes for you.