SD卡CSD version2解析

<pre name="code" class="plain">

typedef unsigned int UINT32;

int main(int argc, char *argv[]) {
//UINT32 csd_arr[4]={0x400e0032,0x5b590001,0xd0df7f80,0xa4000f7};
UINT32 csd_arr[4]={0x400e0032,0x5b590001,0xd87d7f80,0xa40005d};

UINT32 CSD_Structure=(csd_arr[0]&0xc0000000)>>30;
UINT32 reserved=(csd_arr[0]&0x3f000000)>>24;
UINT32 time=(csd_arr[0]&0x00ff0000)>>16;
UINT32 timeclk=(csd_arr[0]&0x0000ff00)>>8;
UINT32 max_rate=csd_arr[0]&0x000000ff;
UINT32 cmd_class=(csd_arr[1]&0xfff00000)>>20;
UINT32 rdata_len=(csd_arr[1]&0x000f0000)>>16;
UINT32 pbra=(csd_arr[1]&0x00008000)>>15;
UINT32 wbm=(csd_arr[1]&0x00004000)>>14;
UINT32 rbm=(csd_arr[1]&0x00002000)>>13;
UINT32 dsr_imp=(csd_arr[1]&0x00001000)>>12;
UINT32 reserved2=(csd_arr[1]&0x00000fc0)>>4;
UINT32 device_size=(csd_arr[1]&0x0000003f)<<16|((csd_arr[2]&0xffff0000)>>16);
UINT32 reserved3=(csd_arr[2]&0x00008000)>>15;
UINT32 esbe=(csd_arr[2]&0x00004000)>>14;//erase single block enable
UINT32 ess=(csd_arr[2]&0x00003f80)>>7;//erase sector size
UINT32 write_protect_group_size=(csd_arr[2]&0x0000007f);
UINT32 write_protect_group_enable=(csd_arr[3]&0x80000000)>>31;
UINT32 reserved4=(csd_arr[3]&0x60000000)>>29;
UINT32 write_speed_factor=(csd_arr[3]&0x1c000000)>>26;
UINT32 max_write_data_block_len=(csd_arr[3]&0x03c00000)>>22;
UINT32 partial_blocks_for_write=(csd_arr[3]&0x00200000)>>21;
UINT32 reserved5=(csd_arr[3]&0x001f0000)>>16;
UINT32 file_format_group=(csd_arr[3]&0x00008000)>>15;
UINT32 copy_flag=(csd_arr[3]&0x00004000)>>14;
UINT32 permanent_write_protection=(csd_arr[3]&0x00002000)>>13;
UINT32 temporary_write_protection=(csd_arr[3]&0x00001000)>>12;
UINT32 file_format=(csd_arr[3]&0x00000c00)>>10;
UINT32 reserved6=(csd_arr[3]&0x00000300)>>8;
UINT32 crc=(csd_arr[3]&0xfe)>>1;
UINT32 nouse=csd_arr[3]&0x1;//'1'

printf("CSD_Structure:%d\r\n", CSD_Structure);
printf("reserved:%d\r\n", reserved);
printf("time:%d\r\n", time);
printf("timeclk:%d\r\n", timeclk);
printf("max_rate:%d\r\n", max_rate);
printf("cmd_class:%d\r\n", cmd_class);
printf("rdata_len:%d\r\n", rdata_len);
printf("pbra:%d\r\n", pbra);
printf("wbm:%d\r\n", wbm);
printf("rbm:%d\r\n", rbm);
printf("dsr_imp:%d\r\n", dsr_imp);
printf("reserved2:%d\r\n", reserved2);
printf("device_size:%d\r\n", device_size);
printf("reserved3:%d\r\n", reserved3);
printf("esbe:%d\r\n", esbe);
printf("ess:%d\r\n", ess);
printf("write_protect_group_size:%d\r\n", write_protect_group_size);
printf("write_protect_group_enable:%d\r\n", write_protect_group_enable);
printf("reserved4:%d\r\n", reserved4);
printf("write_speed_factor:%d\r\n", write_speed_factor);
printf("max_write_data_block_len:%d\r\n", max_write_data_block_len);
printf("partial_blocks_for_write:%d\r\n", partial_blocks_for_write);
printf("reserved5:%d\r\n", reserved5);
printf("file_format_group:%d\r\n", file_format_group);
printf("copy_flag:%d\r\n", copy_flag);
printf("permanent_write_protection:%d\r\n", permanent_write_protection);
printf("temporary_write_protection:%d\r\n", temporary_write_protection);
printf("file_format:%d\r\n", file_format);
printf("reserved6:%d\r\n", reserved6);
printf("crc:%d\r\n", crc);
printf("nouse:%d\r\n", nouse);

return 0;
}