K60 SDHC Module CINS Bit in PRSSTAT Register is always 1 !?

monXii — Tue, 10 Jan 2012 23:58:40 GMT

Hello all..

I'm using a micro sd card and my card holder has no card detect ..

so i want to use the software bit CINS (card inserted) in SDHC->PRSSTAT ..

but this bit is always 1?

did someone used this bit successful?

how this bit works internally? how do they "detect" the card?

Re: K60 SDHC Module CINS Bit in PRSSTAT Register is always 1 !?

monXii — Wed, 11 Jan 2012 18:05:24 GMT

hey all.

i found 2 mistakes..

one on my side .. one on mqx side

first of all the GPIO init of the SDHC pins was "wrong" ..

for card detection over the pin levels, pin 1 (DAT3) of the sdcard must have an pull-down on the host side.

            pctl = (PORT_MemMapPtr)PORTE_BASE_PTR;

            pctl->PCR[0] = value & (PORT_PCR_MUX(4) | PORT_PCR_PS_MASK | PORT_PCR_PE_MASK | PORT_PCR_DSE_MASK);    /* ESDHC.D1 */
            pctl->PCR[1] = value & (PORT_PCR_MUX(4) | PORT_PCR_PS_MASK | PORT_PCR_PE_MASK | PORT_PCR_DSE_MASK);    /* ESDHC.D0 */
            pctl->PCR[2] = value & (PORT_PCR_MUX(4) | PORT_PCR_DSE_MASK);                                          /* ESDHC.CLK */
            pctl->PCR[3] = value & (PORT_PCR_MUX(4) | PORT_PCR_PS_MASK | PORT_PCR_PE_MASK | PORT_PCR_DSE_MASK);    /* ESDHC.CMD */
            pctl->PCR[4] = value & (PORT_PCR_MUX(4) |                                               PORT_PCR_PE_MASK | PORT_PCR_DSE_MASK);    /* ESDHC.D3 */
            pctl->PCR[5] = value & (PORT_PCR_MUX(4) | PORT_PCR_PS_MASK | PORT_PCR_PE_MASK | PORT_PCR_DSE_MASK);    /* ESDHC.D2 */

and my mistake:

i have to set the INITA bit in SDHC_SYSCTL to refresh the PRSSTAT information..

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K60 SDHC Module CINS Bit in PRSSTAT Register is always 1 !?

Re: K60 SDHC Module CINS Bit in PRSSTAT Register is always 1 !?