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

[monXii]

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?

[monXii · Accepted solution]

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..