![]() I wonder if anyone has a better way to deal with all replies than my current solution, which is to calculate the checksum from each of a few start offsets, until it’s correct. For correction to change the CID of the SD card yourself, you must have a special card that has this option, formerly it was samsungi evo, kingstony, etc. So there can be no hard rule to simply wait for 0xFE before reading in the reply (because it may never arrive, or may be part of the actual reply data). Nexcopy provides such equipment for SD card and microSD card duplication, as well as software solutions to control the descriptor fields values (CID). So an issue arises where the correct reply has to be aligned to calculate the reply checksum. Mazda,Mercedes,AUDI,BMW sd card 8gb,16gb,32gb for GPS Navigation, changeable sd card cid Class 10 SD 8GB,6.26/PC MOQ:30PCS The CID number can only be set at the factory, please send us the CID number before placing your order. One way to read the CID is to use a laptop. change cid sd card ,custom sd card cid 16GB. So I guess all the Thinkpad laptops with built-in SD card reader should work. update 1: Ive tried three more SD cards from different brand, all works update 2: I tried the app on my neighbors IBM X60, also worked. ![]() (According to SD card specification the information is only to be written once, however if a card does not conform to the specification this information could be changed) How to read the CID from an SD card. FYI the laptop is IBMs T61 with built-in SD card reader, product id is 7663MC2, the OS is Windows 7 32Bit Home Premium. Something I’ve found interesting is that some cards send no 0xFE token before their reply, and some cards that do send the 0xFE token, also send an 0xFF byte before the token. The CID register is set when the card is manufactured and cannot be changed after it is set. it’s easy to simply duplicate the CSD request routine, and change that to issue CMD10 instead of CMD9. Buy HikginsMemory Card SD Card Support Navigation, Code Writing, High Speed Change CID Navigation GPS Map Only. However, the only instance of the Sd2Card class is in SD.h, in the SDClass, where it is private. I’ve since become interested in the SD card’s CID register, which is never accessed by MDDFS library at all, probably because the info contained it it is not vital to the card’s operation in the way the CSD register is. Free delivery and returns on eligible orders. The readCID () method is a public member of the Sd2Card class. Hi Guys, When I was using Microchip’s MDDFS library in a project implementing an SD card, I filled in a few gaps such as retrieving the name of the partition, and card capacity, etc.
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