topic Re: how to change USB SD-MSD SDHC to SPI mode in MQX Software Solutions

how to change USB SD-MSD SDHC to SPI mode

sudhakarp — Fri, 11 Mar 2016 09:33:34 GMT

Hi,

i am using FRDMK64 controller and KDS3.0 and KSDK1.3.0 example. i got USB SD-card mass storage device from KSDK example.straight way its working with SDHC protocol. but i want to implement with SPI pins.so how to modify code to USB SD-MSD with SPI mode. i saw configuration setting in example code

#if SD_CARD_APP

#define USE_SDHC_PROTOCOL (0)

#define USE_SPI_PROTOCOL (1)

#endif

i changed to SPI_PROTOCOL but its not working. i changed SD card pins connection to SPI pins also. i am sure with hardware connection. can you give some idea..?

regards,

sudhakar p

Re: how to change USB SD-MSD SDHC to SPI mode

Carlos_Musich — Fri, 11 Mar 2016 20:28:20 GMT

Hi Sudhakar,

The example you are using is prepared to add SPI support but it is not implemented yet.

As you can see in disc.c there macro USE_SPI_PROTOCOL is defined but not used. You need to implement each function of the driver and you may use this macro to build SPI functions of DSHC functions.

E.g.

#if USE_SPI_PROTOCOL

void spi_detect_io_init(void)

{

//this must be defined in disc.c by user

}

#else

void sdhc_detect_io_init(void)

{

//this code is already defined in disc.c...

}

#endif

Regards,

Carlos

Re: how to change USB SD-MSD SDHC to SPI mode

sudhakarp — Mon, 14 Mar 2016 04:11:36 GMT

hi,

and also i modified SD_Init() function related to SPI. i attached that code also.but its not working its hanging inside

SDSPI_DRV_Init(); function

if (kStatus_SDSPI_NoError != SDSPI_DRV_GoIdle(spi, card))

{

return kStatus_SDSPI_Failed;

}

please can u find problem where i am doing mistake

thanks and regards,

sudhakar p !

Re: how to change USB SD-MSD SDHC to SPI mode

Carlos_Musich — Mon, 28 Mar 2016 18:46:15 GMT

Hi Sudhakar,

I checked your disc.c file and I did not find the SPI initialization and I saw your edits in USB_App_Class_Callback to read and write using SPI but I did not see the SPI initialization.

Regards,

Carlos