ColdFire/68K Microcontrollers and ProcessorsのトピックRe: SD card I/O error

ColdFire/68K Microcontrollers and ProcessorsのトピックRe: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155682#M4482 <HTML><HEAD></HEAD><BODY><P>Ok, so it looks like the error is being caused by a multi block read on the final block when the card is first inserted. It looks like the solution is to do a single block read for the last block. Is there a patch out there that fixes this, or does anyone know how best to add this to the SD driver for linux kernel 2.6.29?</P></BODY></HTML> Tue, 02 Aug 2011 03:09:20 GMT mendelbullex 2011-08-02T03:09:20Z SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155681#M4481 <HTML><HEAD></HEAD><BODY><P>We have successfully used our SD card to output an audio file on our M54451EVb. WE started working on other things and eventually came back to it without changing the BSp installed. We no longer can use the SD card and get the following message:</P><P> </P><P>mmc0: host does not support reading read-only switch. assuming write-enable.</P><P>mmc0: new SD card on SPI</P><P>mmcblk0: mmc0:0000 SD02G 1.83 GiB</P><P>mmcblk0: p1</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041 Buffer I/O error on device mmcblk0p1, logical block 3841904</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042 Buffer I/O error on device mmcblk0p1, logical block 3841905</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043 Buffer I/O error on device mmcblk0p1, logical block 3841906</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044 Buffer I/O error on device mmcblk0p1, logical block 3841907</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045 Buffer I/O error on device mmcblk0p1, logical block 3841908</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046 Buffer I/O error on device mmcblk0p1, logical block 3841909</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047 Buffer I/O error on device mmcblk0p1, logical block 3841910</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041 Buffer I/O error on device mmcblk0p1, logical block 3841904</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042 Buffer I/O error on device mmcblk0p1, logical block 3841905</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043 Buffer I/O error on device mmcblk0p1, logical block 3841906</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841977</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841978</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841979</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841980</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841981</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841982</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841983</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841984</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841985</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841986</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841987</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841988</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841989</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841990</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841991</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3841992</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842041</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842042</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842043</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842044</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842045</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842046</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 3842047</P><P>mmcblk0: retrying using single block read</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7673</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7674</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7675</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7676</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7677</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7678</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7679</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7680</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7681</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7682</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7683</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7684</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7685</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7686</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7687</P><P>mmcblk0: error -38 sending status comand<3>mmcblk0: error -38 sending read/write command, response 0x4, card status 0xff04</P><P>end_request: I/O error, dev mmcblk0, sector 7688</P><P> </P><P> </P><P> </P><P>Does anyone know what the problem is?</P></BODY></HTML> Tue, 02 Aug 2011 00:04:03 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155681#M4481 mendelbullex 2011-08-02T00:04:03Z Re: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155682#M4482 <HTML><HEAD></HEAD><BODY><P>Ok, so it looks like the error is being caused by a multi block read on the final block when the card is first inserted. It looks like the solution is to do a single block read for the last block. Is there a patch out there that fixes this, or does anyone know how best to add this to the SD driver for linux kernel 2.6.29?</P></BODY></HTML> Tue, 02 Aug 2011 03:09:20 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155682#M4482 mendelbullex 2011-08-02T03:09:20Z Re: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155683#M4483 <HTML><HEAD></HEAD><BODY><P>Ok, I take it back, the single block read after error is already implemented in the kerenel, therefore, I have no idea what is causing this problema dn would love any feedback that anyone can give me.</P><P> </P><P>Thanks</P></BODY></HTML> Tue, 02 Aug 2011 22:54:01 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155683#M4483 mendelbullex 2011-08-02T22:54:01Z Re: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155684#M4484 <HTML><HEAD></HEAD><BODY><P>Turned out we just needed to reformat the card, completely rebuilding the patitions</P></BODY></HTML> Fri, 12 Aug 2011 02:32:11 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155684#M4484 mendelbullex 2011-08-12T02:32:11Z Re: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155685#M4485 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>what speeds do you get when reading from the SD card?</P><P> </P><P>We also tested it, however the speed was only about 100KByte/s which made it unusable for us.</P><P> </P><P>An USB stick in comparison is rather fast with around 10MByte/s.</P><P> </P><P>Marcus</P></BODY></HTML> Fri, 12 Aug 2011 07:55:53 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155685#M4485 IRTrans 2011-08-12T07:55:53Z Re: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155686#M4486 <HTML><HEAD></HEAD><BODY><P>That development board runs the SD cards from the DSPI.</P><P> </P><P>The "lowest common demonimator" speed is 400kHz for "low speed SDIO cards". Other ones should be able to run at up to 25MHz. Check Wikipedia for details on the different speed ratings.</P><P> </P><P>The software you're using may not be switching to a higher clock rate when it could be. It may also not be using the DMA as well as it might.</P><P> </P><P>Tom (A Random Poster)</P><P> </P></BODY></HTML> Fri, 12 Aug 2011 09:16:20 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155686#M4486 TomE 2011-08-12T09:16:20Z Re: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155687#M4487 <HTML><HEAD></HEAD><BODY><P>Thank you for the info.</P><P> </P><P>We are using LINUX - no idea if the LINUX device driver uses the correct clock frequencies.</P><P> </P><P>Marcus</P></BODY></HTML> Fri, 12 Aug 2011 19:06:17 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155687#M4487 IRTrans 2011-08-12T19:06:17Z Re: SD card I/O error https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155688#M4488 <HTML><HEAD></HEAD><BODY><P>Linux code is most likely to be "lowest common denominator" code.</P><P> </P><P>There's a huge amount of code in the Linux driver stack but you're looking for the "low level platform setup" and the DSPI driver code. You don't have to understand all of it, just "pattern match" with the code that writes the relevant DSPI control registers and find what it is doing. Then try increasing the speed and see what happens.</P><P> </P><P>Tom (A Random Poster)</P><P> </P><P> </P><P> </P></BODY></HTML> Sun, 14 Aug 2011 09:22:50 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/SD-card-I-O-error/m-p/155688#M4488 TomE 2011-08-14T09:22:50Z