how use spi set for using polling and interrupt?

rlaxortn — Thu, 19 Jun 2025 01:13:36 GMT

i am trying to use spi communication with BNO080 chip.

and i am using s32ds version 3.6, RTS is 4.0.0.

mcu is s32k314.

and i already watched spi examples, so you don't give examples please.

also, i have a s32k344 evb board(172 Pins)

1. would you check spi setting is right for using polling spi?

a)this is BNO spi Communication Spec.

b) second picture is my spi configure. i am using spi2. cs pin is pcs0.

2. when i am using spi polling, if Lpspi_Ip_SyncTransmit is use, automatically rxbuffer, txbuffer is done? after Lpspi_Ip_SyncTransmit use, i don't need to call other function?

3. i read spi user manual, i find Lpspi_Ip_ManageBuffers() functions.

after i call Lpspi_Ip_SyncTransmit() function, do i have to use Lpspi_Ip_ManageBuffers() function? how this function use?

4. if i use interrupt spi function, how i set spi configure?

it is possible, would you show me pics for setting interrupt spi configure?

5. example has only polling and dma interrupt. if i use spi interrupt, i have to use dma?

also, it is possible, would you show me pics for setting interrupt spi configure?

I've thought about it a lot and done a lot of testing before asking

and i attach BNO080 Datasheet.

thanks to help.

Re: how use spi set for using polling and interrupt?

PetrS — Fri, 20 Jun 2025 08:32:56 GMT

Hi,

1) SPI mode option (CPHA,CPOL) looks right, you should have SpiDataWidth = 8
2) Lpspi_Ip_SyncTransmit return after transfer is done or timeout happens. You need not to call other function
3) When Sync function is used there is no need to call Lpspi_Ip_ManageBuffers. This should be called periodically when Async function is used in polling mode (default)
4) After Lpspi_Ip_Init function is called, LPSPI_IP_POLLING mode is set as default. To change the default mode Lpspi_Ip_UpdateTransferMode should be called. INTC need to be set as well to enable SPI interrupt.
5) DMA is not needed for interrupt mode. You can refer to below example
https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K312-SPI-Transmit-amp-Receive-Using-Interrupt-DS3-5/ta-p/2011866

BR, Petr

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how use spi set for using polling and interrupt?

Re: how use spi set for using polling and interrupt?