裸机测试SD卡

进行裸机测试SD卡时打印出如下信息，我的卡是1G，卡别处用的正常
SDI Card Write and Read Test
Init. Frequency is 301204Hz
In idle
MMC check end!!
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a7f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a7f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a3f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a7f, rSDIRSP0=0xffffffff
CMD55:rSDICSTA=0x1a37, rSDIRSP0=0xffffffff
Initialize fail
No Card assertion

降低时钟试试，看能否初始化？