阅读:857回复:0
读CF卡超时问题
我使用68013 + CF卡做成U盘模式,主机发送读命令后,老是超时,当我不用U盘模式时,读写CF卡都完全正确,这是为什么? 下面使我用BUS HOUND 捕获的部分数据:
CDB 28 00 00 00 00 00 00 00 READ 01 00 LEN 1f 00 00 00 31 DO 55 53 42 43 68 5d 17 81 USBCh].. 00 02 00 00 80 00 0a 28 .......( 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 URB 48 00 09 00 00 00 00 00 BULK/INT XFER e8 17 b4 85 01 00 00 00 7c a5 25 81 00 00 00 00 1f 00 00 00 9c 21 b8 82 URB 48 00 09 00 00 00 01 00 BULK/INT XFER e8 17 b4 85 01 00 00 00 8c a5 25 81 03 00 00 00 00 00 00 00 00 00 00 00 SSTS 09 timeout |
|