topic Re: Config for SPI interrupts in MCUXpresso Config Tools

Config for SPI interrupts

stefanlindblad — Thu, 23 May 2019 09:51:40 GMT

I’m starting out with KL17Z64 and MCUXpresso. For a quick start I decided to use the Config Tool to generate initialization code for the peripherals.

For the SPI in interrupt mode the tool generated this init function:

void SPI_1_init(void) {
/* Enable interrupts */
SPI_EnableInterrupts(SPI_1_PERIPHERAL, (kSPI_RxFifoNearFullInterruptEnable | kSPI_TxFifoNearEmptyInterruptEnable));
/* Enable interrupt SPI0_IRQn request in the NVIC */
EnableIRQ(SPI_1_IRQN);
/* Initialization function */
SPI_SlaveInit(SPI_1_PERIPHERAL, &SPI_1_config);
}

Looks like the functions are called in wrong order, SPI_EnableInterrupts() crashes as the clock for the SPI is enabled first in SPI_SlaveInit().

Regards,

Stefan

Re: Config for SPI interrupts

Alice_Yang — Tue, 28 May 2019 08:56:45 GMT

Hello Stefan Lindblad ,

Yes, the sequence is wrong, the right sequence should like below:

void SPI_1_init(void) {
/* Initialization function */
SPI_SlaveInit(SPI_1_PERIPHERAL, &SPI_1_config);

/* Enable interrupt SPI0_IRQn request in the NVIC */
EnableIRQ(SPI_1_IRQN);
/* Enable interrupts */
SPI_EnableInterrupts(SPI_1_PERIPHERAL, (kSPI_RxFullAndModfInterruptEnable | kSPI_TxEmptyInterruptEnable));
/* Initialization function */
}

I will report it to development team. And now , I recommend you refer to the SPI demo under KL27 board,

Hope it helps,

Have a great day,
TIC

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Re: Config for SPI interrupts

Lukas_Heczko — Tue, 28 May 2019 12:36:06 GMT

Hi Stefan,

this is indeed issue in SPI component in Peripherals tool. It affects also the FLEXCOMM variant of the SPI component used by LPC processors.

Attached please find patch fixing the issue in MCUXpresso Config Tools v5. Instructions how to apply the patch are included in the archive. This issue will be fixed in upcoming MCUXpresso Config Tools v6.

Thank you for reporting this issue and we apologizes for the inconvenience.

Regards,

Lukas