I have a chinease cards that allows me to send cmd26, i send it , then get respond then send 16 byte cid thourgh data pin, card answers success, but cid didnt change. I doing it by CD MODE. So i think im missing some commands. According to the guys who changed cid in SAMSUNG EVOS cards, they do: cmd62 0xEFAC62EC (enter vendor mode)cmd62 0xEF50 (unlock the backdoor)cmd17 0x00 (confirm Smart Report after reading Sector 1 at Address 0)cmd26 0x00 0xFE [16bytes NEW CID] (WRITE_CID+single block write start TOKEN+16byte NEW CID)cmd62 0x00DECCEE (exit vendor mode)But i dont know, my card doesnt answer on cmd62 also the message seems strange, all cmds in SD card should be 6 bytes, and here its 5 or 2 bytes send.
Hello folks, I'm working hard to make this work:cmd62 0xEFAC62EC (enter vendor mode)cmd62 0xEF50 (unlock the backdoor)cmd17 0x00 (confirm Smart Report after reading Sector 1 at Address 0)cmd26 0x00 0xFE [16bytes NEW CID] (WRITE_CID+single block write start TOKEN+16byte NEW CID)cmd62 0x00DECCEE (exit vendor mode)but no joy, it doesn't work for me. I have the right cards, I'm sure because with this https://github.com/raburton/evoplus_cid I'm able to change the cid on them all, where am I wrong?Maybe there is a some sort of typo somewhere in the commands' sequence written by JeezyWonder.Is there anyone who tried those commands with Arduino, mine is a MEGA 2560, and can confirm that it works?Cards I own allows answer on cmd62 but then the thing abort with error 04hex (illegal command) while performing cmd26.
but in my opinion the back door is only usable via sd mode, not spi, and the sd mode protocol in addition to not being documented requires the payment of royalties for its use, it isn't free and documented as the well-known protocol spi.
If you're talking about sdio mode, it is supported by the sdfat library and it works on Teensy.
I'm not talking about sdio, I'm talking about sd mode.sdio isn't sd mode at all, sdio requires special cards: https://tinyurl.com/ybh9vqv6Moreover the sd mode protocol requires the payment of royalties to be used, it isn't free.
According to thishttps://electronics.stackexchange.com/questions/124234/difference-between-1-bit-4-bit-and-8-bit-sdiothey are the same.
Have you a web page or document that explain this sd mode?