It seems to be very hard to stop the spreading of the 'urban myth' that a disk volume serial number is the same as a memory cards CID (128 bit Card identification number: individual card number for identification). I've tried many times to explain that it doesn't work that way. The CID is permanent in the memory cards internal register.
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Download Micro SD CID Reader PC for free at BrowserCam. BI3 Apps published Micro SD CID Reader for Android operating system mobile devices, but it is possible to download and install Micro SD CID Reader for PC or Computer with operating systems such as Windows 7, 8, 8.1, 10 and Mac.
Let's find out the prerequisites to install Micro SD CID Reader on Windows PC or MAC computer without much delay. Vidyo desktop mac.
Select an Android emulator: There are many free and paid Android emulators available for PC and MAC, few of the popular ones are Bluestacks, Andy OS, Nox, MeMu and there are more you can find from Google.
Compatibility: Before downloading them take a look at the minimum system requirements to install the emulator on your PC.
- This question is about a technique to get a special piece of information of a SD Secure Digital or MMC Multimedia Card. The information I need is the cards unique ID called the CID. It is easy to do this if you are programming on a PDA running Wince or Linux. The question I have is, can it be done on a PC running windows or linux.
- SD cards are used to provide expandable storage to a huge range of devices form cell phones and cameras, to gaming systems and laptop computers. Every SD card that is made must have a CID in order to interface with another device. THE CID is a special identifying code that is unique to each card, working in the same fashion as a serial number.
Puthu vasantham tamil movie mp3 songs free, download. For example, BlueStacks requires OS: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP2, Windows XP SP3 (32-bit only), Mac OS Sierra(10.12), High Sierra (10.13) and Mojave(10.14), 2-4GB of RAM, 4GB of disk space for storing Android apps/games, updated graphics drivers.
Finally, download and install the emulator which will work well with your PC's hardware/software.
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How to Download and Install Micro SD CID Reader for PC or MAC:
How To Get Sd Card Serial Cidb
- Open the emulator software from the start menu or desktop shortcut in your PC.
- Associate or set up your Google account with the emulator.
- You can either install the app from Google PlayStore inside the emulator or download Micro SD CID Reader APK file from the below link from our site and open the APK file with the emulator or drag the file into the emulator window to install Micro SD CID Reader for pc.
You can follow above instructions to install Micro SD CID Reader for pc with any of the Android emulators out there.
Sd Cid
SD and SDHC cards have a number offeatures intended to secure the data stored on the cards. I'm notcounting the write-lock switch on the side of the SDHC cardshere. That 'switch' is only a mechanical device intended toprovide a hint to the host computer that it should not write to thecard. Nothing in the SD card electronics can sense the state ofthat slider and there is no way for the card's electronics to enforceyour request that the card contents not change.
The first layer of protection enforced by the card is theTMP_WRITE_PROTECT bitin the card's CSD register. The TMP_WRITE_PROTECT bit allows youtowrite-lock or unlock the card. If the TMP_WRITE_PROTECT bit isset, thecard's electronics will refuse to modify the data contents of the card,though the data can still be read by the host computer. You canmodify the TMP_WRITE_PROTECT bit as often as you like.
The second layer of protection is the PERM_WRITE_PROTECT bit in thecard's CSDregister. As its name implies, this is a permanent write-lock,though the card's data can still be read. The bit is cleared fromthe factory and can be set one time only; once set, it cannot becleared.
The third layer of protection is the PWD (password) register in thecard. This register and its associated PWD_LEN register allow youto set a non-volatile password of up to 16 bytes for the card. Ifthe password is set, the card will deny any read or write attempt tothe card's data unless the host computer first sends a matchingpassword command to the card. This password protection appliesafter each power-up; the password must be resent after eachpower-cycle. One interesting feature of the password is that itneed not be ASCII characters. You can set a password that isentirely binary (non-printable ASCII), should that be to youradvantage. Refer to Section 4.3.7, Card Lock/Unlock Operation,for more details (Physical Layer Simplified Specification, Ver 2.00, SDGroup).
The SD Locker
The SD locker is a small electronic device that provides one-buttonlock/unlock capability for SD cards, using the TMP_WRITE_PROTECTbit. The SD locker uses an AtmelATmega328p microcontroller (MCU) to control the SD card via the SPIbus. The SD locker is small enough to build into an Altoids can,complete with a pair of AA batteries for a power supply. Operation could not be simpler. Turn on the device, plug in an SDcard, press the LOCK button to lock the card or the UNLOCK button tounlock the card; done.
You can see the schematic here (PDF).
Here you see the SD locker in its Altoids chassis. The small,green PCB taped to the top of the SD card socket is a 3.3 VDC boostregulator, available from Pololu. To the front of the picture arethree LEDs; left to right, they are power, UNLOCK, and LOCK
Here is a closeup showing the tiny pushbuttons (left and middle) andslide switch (far right) used in the design. Space is reallycramped, due to the size of the SD card socket. The LOCK buttonis on the left, next to the red LOCK LED.
Although I've been referring to SD cards, the SD locker works equallywell with SDHC and microSDHC cards.
I built my prototype SD locker on a piece of Vector perfboard withplated-through holes. The component placement isn't critical, butspace is tight if you want to fit this into an Altoids can. Ithelps to use tiny pushbuttons and a tiny slide switch (forpower). I got all of my switches from Pololu, who sells someexcellent tiny parts for the robot builder or experimenter. Besides the switches, I also added Pololu's 2563 3.3 VDC boostregulator, which turns the 3 VDC from the AA batteries into the 3.3 VDCneeded by the MCU and SD card. Note that if you use such aregulator in your device, make sure you only use alkaline batteries topower your device. If you use rechargeable batteries, such asNiMH, the regulator will run the batteries so low that they may notrecharge.
The design includes a 4-pin serial port terminal, so I can connect mySD locker to HyperTerm or another comm program. I have built alot of capability into the firmware that uses the serial port forcontrol and for feedback. Note that the SD locker works just finewithout using the serial port. In fact, you can omit the 4-pinterminal and associated wiring to save space. If you choose toadd the serial port, you will have to provide an RS-232 level-shiftercircuit, as the signals on the connector are CMOS level (0 to 3.3VDC). You can connect the SD locker to a comm port set for 38.4K,8N1.
If you are using the serial port, you can use a few one-letter commandsto read or modify the SD card. Use '?' to show several of thecard's registers, 'l' to lock the SD card, 'u' to unlock the card, and'r' to read and display the contents of the card's block 0.
How it works
When powered up, the device sits in a loop, waiting for you to pressone of the two buttons. When you press either button, the codetries to access the SD card. If it can't read the card (forexample, if no card has been plugged in yet), the code blinks the LOCKLED in an error pattern.
If the code can access the card, it sends a CMD9 to read the card's CSDregister. To lock the card, the code sets TMP_WRITE_PROTECT (bit12) of the CSDimage; to unlock, it clears bit 12. The code then uses CMD27 towrite the modified CSD data back to the card. Next, the coderereads the CSD register and verifies that the TMP_WRITE_PROTECT bitchanged asexpected. Finally, the code lights the LED corresponding to thestate of the TMP_WRITE_PROTECT bit. This means that if either LEDis lit,it reflects the state of the TMP_WRITE_PROTECT bit, even if the bitdidn'tchange state for some reason.
Using CMD27 requires the ability to calculate a CRC7 checksum of thedata block you are sending to the card. In my case, I lifted aCRC7 generator function from the Pololu website and used it with nofunctional modifications; thanks, Pololu!
The code makes no assumptions about the card staying in the SDsocket. Each time you press a button, the code restarts theinitialization ritual. This means you can change the lock on asmany cards as you want, in any order, with no fears that the SD lockerwill get mixed up by the swap.
You can get the source code and a HEX image here. Note that you will not be able to rebuild this C source, as it uses alot of my custom UART library code. If you want to rebuild thesource, either replace my UART functions with your own functions, orstrip out the UART library calls and use just the pushbuttons and LEDs.
The source code is built on code from various web sources, notably ChaN, of FatFS fame. I borrowedsome of the SD card primitives from ChaN, who did a really cool MP3 player withan ATtiny45 and an SD card; if you haven't seen this project, check itout.
Where to from here?
This code only addresses use of the TMP_WRITE_PROTECT bit to write-lockthe SDcard. This makes the SD locker a good choice for use as part of astealth PC. Since the image on the locked card cannot be modifiedby the OS, even if the card is used in an USB adapter, you can bootfrom the card, do your stuff, then shut down knowing that the imagehasn't changed. This means your boot image is free of cookies,malware, or modified files.
The obvious improvment to this project would be support for passwordprotection. The simplest method would be to use a single, fixedpassword for all SD cards. To do card-specific passwords withouthaving to open up serial port access, the code could read the card's IDregister (CID) and build a password from that information. If youadd serial port access for the user, you could allow the user to setthe password for each card (as identified by reading the CID), thenrecord the passwords in the MCU's EEPROM.
With password support, you will also need a way to remove anypassword. This can be done one of two ways. If you know theoriginal password, you can change it to be empty (PWD LEN of 0). If you don't know the original password, your code can use theappropriate SD commands to erase the entire SD card. This willremove the password, but obviously it will also remove the data. You can find details on these operations in the SD Association'sreference material.
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The first layer of protection enforced by the card is theTMP_WRITE_PROTECT bitin the card's CSD register. The TMP_WRITE_PROTECT bit allows youtowrite-lock or unlock the card. If the TMP_WRITE_PROTECT bit isset, thecard's electronics will refuse to modify the data contents of the card,though the data can still be read by the host computer. You canmodify the TMP_WRITE_PROTECT bit as often as you like.
The second layer of protection is the PERM_WRITE_PROTECT bit in thecard's CSDregister. As its name implies, this is a permanent write-lock,though the card's data can still be read. The bit is cleared fromthe factory and can be set one time only; once set, it cannot becleared.
The third layer of protection is the PWD (password) register in thecard. This register and its associated PWD_LEN register allow youto set a non-volatile password of up to 16 bytes for the card. Ifthe password is set, the card will deny any read or write attempt tothe card's data unless the host computer first sends a matchingpassword command to the card. This password protection appliesafter each power-up; the password must be resent after eachpower-cycle. One interesting feature of the password is that itneed not be ASCII characters. You can set a password that isentirely binary (non-printable ASCII), should that be to youradvantage. Refer to Section 4.3.7, Card Lock/Unlock Operation,for more details (Physical Layer Simplified Specification, Ver 2.00, SDGroup).
The SD Locker
The SD locker is a small electronic device that provides one-buttonlock/unlock capability for SD cards, using the TMP_WRITE_PROTECTbit. The SD locker uses an AtmelATmega328p microcontroller (MCU) to control the SD card via the SPIbus. The SD locker is small enough to build into an Altoids can,complete with a pair of AA batteries for a power supply. Operation could not be simpler. Turn on the device, plug in an SDcard, press the LOCK button to lock the card or the UNLOCK button tounlock the card; done.
You can see the schematic here (PDF).
Here you see the SD locker in its Altoids chassis. The small,green PCB taped to the top of the SD card socket is a 3.3 VDC boostregulator, available from Pololu. To the front of the picture arethree LEDs; left to right, they are power, UNLOCK, and LOCK
Here is a closeup showing the tiny pushbuttons (left and middle) andslide switch (far right) used in the design. Space is reallycramped, due to the size of the SD card socket. The LOCK buttonis on the left, next to the red LOCK LED.
Although I've been referring to SD cards, the SD locker works equallywell with SDHC and microSDHC cards.
I built my prototype SD locker on a piece of Vector perfboard withplated-through holes. The component placement isn't critical, butspace is tight if you want to fit this into an Altoids can. Ithelps to use tiny pushbuttons and a tiny slide switch (forpower). I got all of my switches from Pololu, who sells someexcellent tiny parts for the robot builder or experimenter. Besides the switches, I also added Pololu's 2563 3.3 VDC boostregulator, which turns the 3 VDC from the AA batteries into the 3.3 VDCneeded by the MCU and SD card. Note that if you use such aregulator in your device, make sure you only use alkaline batteries topower your device. If you use rechargeable batteries, such asNiMH, the regulator will run the batteries so low that they may notrecharge.
The design includes a 4-pin serial port terminal, so I can connect mySD locker to HyperTerm or another comm program. I have built alot of capability into the firmware that uses the serial port forcontrol and for feedback. Note that the SD locker works just finewithout using the serial port. In fact, you can omit the 4-pinterminal and associated wiring to save space. If you choose toadd the serial port, you will have to provide an RS-232 level-shiftercircuit, as the signals on the connector are CMOS level (0 to 3.3VDC). You can connect the SD locker to a comm port set for 38.4K,8N1.
If you are using the serial port, you can use a few one-letter commandsto read or modify the SD card. Use '?' to show several of thecard's registers, 'l' to lock the SD card, 'u' to unlock the card, and'r' to read and display the contents of the card's block 0.
How it works
When powered up, the device sits in a loop, waiting for you to pressone of the two buttons. When you press either button, the codetries to access the SD card. If it can't read the card (forexample, if no card has been plugged in yet), the code blinks the LOCKLED in an error pattern.
If the code can access the card, it sends a CMD9 to read the card's CSDregister. To lock the card, the code sets TMP_WRITE_PROTECT (bit12) of the CSDimage; to unlock, it clears bit 12. The code then uses CMD27 towrite the modified CSD data back to the card. Next, the coderereads the CSD register and verifies that the TMP_WRITE_PROTECT bitchanged asexpected. Finally, the code lights the LED corresponding to thestate of the TMP_WRITE_PROTECT bit. This means that if either LEDis lit,it reflects the state of the TMP_WRITE_PROTECT bit, even if the bitdidn'tchange state for some reason.
Using CMD27 requires the ability to calculate a CRC7 checksum of thedata block you are sending to the card. In my case, I lifted aCRC7 generator function from the Pololu website and used it with nofunctional modifications; thanks, Pololu!
The code makes no assumptions about the card staying in the SDsocket. Each time you press a button, the code restarts theinitialization ritual. This means you can change the lock on asmany cards as you want, in any order, with no fears that the SD lockerwill get mixed up by the swap.
You can get the source code and a HEX image here. Note that you will not be able to rebuild this C source, as it uses alot of my custom UART library code. If you want to rebuild thesource, either replace my UART functions with your own functions, orstrip out the UART library calls and use just the pushbuttons and LEDs.
The source code is built on code from various web sources, notably ChaN, of FatFS fame. I borrowedsome of the SD card primitives from ChaN, who did a really cool MP3 player withan ATtiny45 and an SD card; if you haven't seen this project, check itout.
Where to from here?
This code only addresses use of the TMP_WRITE_PROTECT bit to write-lockthe SDcard. This makes the SD locker a good choice for use as part of astealth PC. Since the image on the locked card cannot be modifiedby the OS, even if the card is used in an USB adapter, you can bootfrom the card, do your stuff, then shut down knowing that the imagehasn't changed. This means your boot image is free of cookies,malware, or modified files.
The obvious improvment to this project would be support for passwordprotection. The simplest method would be to use a single, fixedpassword for all SD cards. To do card-specific passwords withouthaving to open up serial port access, the code could read the card's IDregister (CID) and build a password from that information. If youadd serial port access for the user, you could allow the user to setthe password for each card (as identified by reading the CID), thenrecord the passwords in the MCU's EEPROM.
With password support, you will also need a way to remove anypassword. This can be done one of two ways. If you know theoriginal password, you can change it to be empty (PWD LEN of 0). If you don't know the original password, your code can use theappropriate SD commands to erase the entire SD card. This willremove the password, but obviously it will also remove the data. You can find details on these operations in the SD Association'sreference material.
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