S32KのトピックRe: S32K3xx SpiBaudrateConfigRef set

S32K3xx SpiBaudrateConfigRef set

karmegancjk — Fri, 16 May 2025 08:04:14 GMT

Hi,

Configuration Components for SDK Peripheral Drivers— LPSPI:

1. Lpspi → SpiExternalDevice → SpiUseBaudrateConfig → SpiBaudrateConfigRef? What is the purpose of this setting, and how do you configure it?

2. What is the difference between SpiUseBaudrateConfig and SpiCalculatedBaudRate for SPI baud rate selection?

3. I need a user-friendly way to configure the SPI baud rate. How can I do that?

Regards,

Karmegan C

Re: S32K3xx SpiBaudrateConfigRef set

Julián_AragónM — Fri, 16 May 2025 15:39:08 GMT

Hi @karmegancjk,

All of the configuration parameters are described inside the respective driver user manual. Under "C:\NXP\S32DS.3.6.1\S32DS\software\PlatformSDK_S32K3\RTD\Spi_TS_T40D34M50I0R0\doc" you can find RTD_SPI_UM.pdf.

1. SpiBuadrateConfigRef is the reference node used in order to calculate the Spi baud rate.

2. SpiUseBaudrateConfig uses the reference node, SpiCalculatedBaudRate uses the following formula:

SpiCalculatedBaudrate = Function clock / (SpiPrescalerValue * (SpiScaler + 2))

3. You can use the existing example "Spi_Transfer_S32K344" to use as base. Also, chapter 3.6.13 of the previously mentioned file shows how to configure baud rate:

Best regards,
Julián

Re: S32K3xx SpiBaudrateConfigRef set

karmegancjk — Mon, 19 May 2025 05:51:20 GMT

Hi,

I am not able to assign SpiBaudrateConfig_0 to SpiBaudrateConfigRef in Lpspi Driver.

IDE : S32DS 3.5.13.

RTD : R22_11 V4.0.0.

How do I set the path of SpiBaudrateConfig_0 in SpiBaudrateConfigRef?

Re: S32K3xx SpiBaudrateConfigRef set

Julián_AragónM — Tue, 20 May 2025 21:55:26 GMT

Hi @karmegancjk,

Apparently, only the MCAL Spi component generates a valid SpiBaudRateConfigRef value. I did not notice this since I was basing the project in MCAL and not IP:

I think this is not intended, so for now, either configure the SPI component without the "UseBaudrateConfig" parameter or with the MCAL component to generate the reference. I will ask internally to see if this is expected behavior.

Best regards,
Julián

Re: S32K3xx SpiBaudrateConfigRef set

Julián_AragónM — Thu, 24 Jul 2025 15:42:49 GMT

Hi @karmegancjk

I've confirmed with the internal team, and this is a bug. It is planned to be fixed in the next RTD release.

Best regards,
Julián

Re: S32K3xx SpiBaudrateConfigRef set

daniel_ll — Thu, 24 Jul 2025 14:16:04 GMT

Hi Julián,

Do you have a link to the Jira bug? And/or more info about in what RTD release this will be fixed? Facing the same issue with RTD 5.0.0

Re: S32K3xx SpiBaudrateConfigRef set

Julián_AragónM — Thu, 24 Jul 2025 15:43:26 GMT

Hi @daniel_ll,

I've sent you a private message regarding this issue.