Hello, does anyone know any examples for change the bits in CSD ? CMD27 0x5B // change the bits in CSD Change bit 12 (TMP_WRITE_PROTECT) to get SD card write protected and no. [image] [image]

You need to read the CSD, change the bit and write the CSD back. You must also update the CRC. I didn't include a writeReg/writeCSD function in SdFat since you can also permanently write protect the card. You can see how to make writeCSD() by looking at writeData().

Alex640: Hello, does anyone know any examples for change the bits in CSD ? CMD27 0x5B // change the bits in CSD Change bit 12 (TMP_WRITE_PROTECT) to get SD card write protected and no. [image] [image] Can you share sketch from your screen?

fat16lib would,you do me a favor and show how a writeCSD or writeCID WOULD look? I think one simply have to issue the command as usual, then wait for a ready to receive token from the card and send the bytes needed (16). But i really need some example code please :slight_smile:

mikrotron: fat16lib would,you do me a favor and show how a writeCSD or writeCID WOULD look? I think one simply have to issue the command as usual, then wait for a ready to receive token from the card and send the bytes needed (16). But i really need some example code please :slight_smile: Send …

Have forked the SDFS library and added the writeCSD and writeRegister function. Please use it at your own risk. Thanks fat16 aka greiman for the awesome library. [image] GitHub - digitalpbk/SdFs: Arduino FAT16/FAT32/exFAT Library Arduino FAT16/FAT32/exFAT Library. Contribute to digital…

Only a few bits of the CSD register are writable (many are read-only - see datasheet). Changing these bits is a trivial task, especially with the SdFs library. An example is attached. This sketch posibles view state and allows you to reset the tmp_write_protect bit (as example). However, keep in min…

Nice work! It is also possible to lock/unlock an SD/µSD card with a password. See link: https://www.seanet.com/~karllunt/sdlocker2.html But it could be naughty to implement the CSD PWD function, so it is as easy to use as tmp_write_protect. m_csd.v1.tmp_write_protect = 0; // SET TMP OFF m_csd.v2…

SD card CSD register change bits (CMD27)

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SD card CSD register change bits (CMD27)

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