MCUXpresso GeneralのトピックRe: How to use MCUXpresso SDK API (SDSPI)

How to use MCUXpresso SDK API (SDSPI)

stephenfzhou — Mon, 11 May 2020 04:13:41 GMT

Hi All,

I'm a new user of NXP's MCU. I want to use the SDSPI in MCUXpresso SDK API, but I don't know how to do the initial. The typical use case is written as below:

/* SPI_Init(). */

/* Register the SDSPI driver callback. */

/* Initializes card. */

if (kStatus_Success != SDSPI_Init(card))

and I also check the definition of struct "sdspi_host_t" and "sdspi_card_t".

But I'm confused about how to initialize them, how to use the SPI1 port to use the API.

ps: I'm using FRDM-KL46Z and Xpresso IDE + SDK 2.4.1.

Thank you for your kindly reply!

Re: How to use MCUXpresso SDK API (SDSPI)

jingpan — Mon, 11 May 2020 08:17:16 GMT

Hi Fei,

Please read the following documents in order to implement FatFs using SPI.

Porting FatFs file system to KL26 SPI SD card code

https://www.nxp.com/docs/en/application-note/AN10406.pdf

Regards,

Jing

Re: How to use MCUXpresso SDK API (SDSPI)

stephenfzhou — Tue, 12 May 2020 01:08:54 GMT

Hi Jing,

Thank you for your kindly reply!

The tutorial you gave is really useful to implement FatFs using SPI. But my project developed on SDK 2.4.1, actually I don't need FatFs.

And the problem I met is when I used the SDSPI, I found in the function SDSPI_Init(card), the structure "card" is defined by struct "sdspi_host_t" and "sdspi_card_t". And I don't know how to connect to the SPI port: SPI1. I didn't find any information about it in Reference Manual.

I'm a new developer, appreciate any specific tips!

Thank you!

Best,

Fei

Re: How to use MCUXpresso SDK API (SDSPI)

jingpan — Wed, 13 May 2020 08:52:06 GMT

Hi,

You should initialize sdspi_card_t base on your card. The "sdspi_host_t" is initialize in fsl_sdspi_disk.c.

BOARD_SDSPI_SPI_BASE should point to the SPI peripheral you used. Define BOARD_SDSPI_SPI_BASE in board.h.

Regards,

Jing

Re: How to use MCUXpresso SDK API (SDSPI)

stephenfzhou — Wed, 13 May 2020 13:57:16 GMT

Hi Jing,

Thanks! I'll have a try.

Best,

Fei