ColdFire/68K Microcontrollers and ProcessorsのトピックRe: interfacing sdcard using qspi

interfacing sdcard using qspi

yuvi — Thu, 08 Jan 2009 14:00:01 GMT

Hi,

I am using MCF52223EVB & trying to connect the sd card to QSPI bus.

But can't seem to get it working . I tried to search the forum but couldn't

get much help. Please can someone who has succesfully done this

before guide me in the right direction.

thanks

yuvi

Re: interfacing sdcard using qspi

stzari — Thu, 08 Jan 2009 19:47:36 GMT

Hi,

did you configure the GPIOs ?
Do you see any clock or data on the lines ?

stzari

Re: interfacing sdcard using qspi

yuvi — Thu, 08 Jan 2009 21:26:00 GMT

yes i have initialised GPIOs .

MCF_GPIO_PQSPAR = ( MCF_GPIO_PQSPAR_DOUT_GPIO
                                            | MCF_GPIO_PQSPAR_DIN_GPIO
                                            | MCF_GPIO_PQSPAR_SCK_GPIO
                                            | MCF_GPIO_PQSPAR_CS0_GPIO)

& no i can't detect any clock & data on the QSPI.

I have initialised GPIOs before setting up the QSPI registers(i believe thats the

correct ways to do it).

Re: interfacing sdcard using qspi

RichTestardi — Thu, 08 Jan 2009 23:14:44 GMT

Have you seen this?

http://www.mcu.fluxfocus.com/documents/SDSPI/sdspi.htm

Also, can you tell us what, specifically, doesn't work and how?

And what software you are using?

If it helps to see my qspi driver, it is attached (ignore the 51jm128 code -- you want the 52221/52233 code).

-- Rich

Re: interfacing sdcard using qspi

bkatt — Fri, 09 Jan 2009 03:54:26 GMT

yuvi wrote:
yes i have initialised GPIOs .

MCF_GPIO_PQSPAR = ( MCF_GPIO_PQSPAR_DOUT_GPIO
                                            | MCF_GPIO_PQSPAR_DIN_GPIO
                                            | MCF_GPIO_PQSPAR_SCK_GPIO
                                            | MCF_GPIO_PQSPAR_CS0_GPIO)

Re: interfacing sdcard using qspi

yuvi — Wed, 14 Jan 2009 15:41:20 GMT

Hi everyone,

thanks for your replies. i finally got it working. the problem was as indicated by bkatt the GPIO setting.

i was using qspi_cs3 for initialization which was already configured for USB pull down. i connected

my sd card to cs0 & got it working .

but here arises a new question that all these GPIOs are mutually exclusive . what if i wish to connect 4

peripherals to qspi & also use USB then what do i need to do??

thnks again