YangZ
Newbie level 5
Hey!
Good day to all forumers! I am currently developing an SD card controller for my school project. So far I have already establish everything but im uncertain of how to specify the start address to read the txt file that i saved in my SD card. My program uses single block read. I used winhex to check where is the location of my file saved and it says its on (offset = 0003F000). i used this offset address as the argument start address of the read command and found out that the data i received is not what is shown in winhex. Am i assigning the corret start address? Please give me some advice.
The image below shows winhex specifying the start address of my test.txt file and this is how i specify the read command in vhdl:-
when stSendRDCmd => --read the offset address at cluster2 "0003F000" of SD --card
CmdByte <= "01010001"; --cmd17
DataByte1 <=(others =>'0');
DataByte2 <= "00000011";
DataByte3 <= "11110000";
DataByte4 <=(others =>'0');
CRCByte <=(others =>'1'); --i have disable the CRC feature
Good day to all forumers! I am currently developing an SD card controller for my school project. So far I have already establish everything but im uncertain of how to specify the start address to read the txt file that i saved in my SD card. My program uses single block read. I used winhex to check where is the location of my file saved and it says its on (offset = 0003F000). i used this offset address as the argument start address of the read command and found out that the data i received is not what is shown in winhex. Am i assigning the corret start address? Please give me some advice.
The image below shows winhex specifying the start address of my test.txt file and this is how i specify the read command in vhdl:-
when stSendRDCmd => --read the offset address at cluster2 "0003F000" of SD --card
CmdByte <= "01010001"; --cmd17
DataByte1 <=(others =>'0');
DataByte2 <= "00000011";
DataByte3 <= "11110000";
DataByte4 <=(others =>'0');
CRCByte <=(others =>'1'); --i have disable the CRC feature