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embedsky_lhh 发表于 2012-8-8 18:08
写保护没连接的话挂载的时候应该是只读的,与这个没关系,这个脸通信都有问题,估计时钟线没走好,有干扰
您好,我测了一下clk信号,信号蛮好的,我试了一下把上拉电阻改小,插入SD卡(256MB)出现以下打印信息:
mmc0: new high speed SD card at address b368
mmcblk0: mmc0:b368 SD 244 MiB
mmcblk0: retrying using single block read
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 0
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 1
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 2
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 3
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 4
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 5
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 6
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 7
Buffer I/O error on device mmcblk0, logical block 0
mmcblk0: retrying using single block read
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 0
mmc0: ADMA error
mmc0: Got data interrupt 0x00400000 even though no data operation was in progress.
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
mmcblk0: error -5 transferring data, sector 1, nr 7, card status 0x0
end_request: I/O error, dev mmcblk0, sector 1
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 2
mmc0: Got data interrupt 0x02000000 even though no data operation was in progress.
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 3
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 4
mmc0: Got data interrupt 0x02000000 even though no data operation was in progress.
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 5
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
end_request: I/O error, dev mmcblk0, sector 6
mmc0: ADMA error
mmc0: Got data interrupt 0x00400000 even though no data operation was in progress.
mmcblk0: error -110 sending status command
mmcblk0: error -110 sending read/write command, response 0x0, card status 0x0
mmcblk0: error -5 transferring data, sector 7, nr 1, card status 0x0
end_request: I/O error, dev mmcblk0, sector 7
Buffer I/O error on device mmcblk0, logical block 0
mmcblk0: unable to read partition table
拔出SD卡
mmc0: card b368 removed
上面还有错误,不知道是什么原因,请指点 |
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