nxp mifare

1). Introduction MQX is a real-time operating system provided by NXP, with the following diagram showing the kernel, file system and protocol stack, as well as good support for NXP's arm processor, which can be easily developed and deployed. This article demonstrates compiling and deploying MQX applications based on the Toradex Colibri VF61 (NXP VF61 SoC) Arm computer module paired with the Colibri Eva Boa

The previous example describes the general steps for detecting and reading and writing NFC tags. This example describes the common Mifare tags. The Mifare Tag can be 1 K, 2 K, and 4 K. The memory partition is similar, and the memory distribution of the 1 K-byte Tag is given: Data is divided into 16 segments, each with 4 blocks. Each Block can store 16 bytes of data. The size is 16X4X16 = 1024 bytes. The la

. Let's talk about the common solutions for RF cards: Phillips's Mifare, Sony's felica, and PBOC of the Chinese name bank. Mifare card has many versions (see http://en.wikipedia.org/wiki/MIFARE for details), common versions include Mifare classic and Mifare desfire, which a

followed, b4-b0 must have and only 1 bit is 1. Generally, the atqa of Mifare S50 is 0004 H, and that of Mifare s70 is 0002 H. 2. anticollision Loop) When multiple cards enter the reader operation range, the anti-conflict mechanism selects one of them for the operation. If not selected, the system is in idle mode and waits for the next card selection, this process returns the serial number of the selected

In the Mifare card, energy and data are transmitted through an antenna. The antenna in the card contains several turns of coils and is directly connected to the chip without additional components. The coil is embedded in plastic to form a passive non-contact card. The card reader sends a set of Fixed-frequency electromagnetic waves to the IC. The card contains an IC series resonance circuit, which is the same as the frequency of the reader. In this w

Phillips's Mifare card is widely used in the market due to its high security. For example, we use bus cards, meal cards for schools and corporate canteens, etc. each slice has an independent key (six-byte password). During communication, the key must be verified before data can be read and written. its key technology is to use the triple-encryption DES algorithm for key verification (that is, the keys transmitted between the reader and the card are en

0x00 Preface I have always wanted to play wireless security, but wangcai said that the threshold is low (where is it low? =. = Web dog: I am stupid, Wang). I started ACR122u and wanted to get into trouble from NFC. Now I have read this article to popularize basic knowledge. Mifare Classic card provides 1-4 k capacity. We often see the Mifare Classic 1 k (S50), the so-called M1 card. The M1 card has 16 secto

The Mifare IC chip contains the EEPROM, rfinterface, and digital control unit. 1. rfrf Interface Rfrf interface circuits mainly include waveform conversion modules. It can receive the 13.56mhz radio modulation frequency on the card reader. On the one hand, it sends the modulation/Demodulation module, and on the other hand it converts the waveform, converts the sine wave into a square wave, and then rectifies and filters it, the voltage control modul

　　 text/Shing original reprint please indicate the source http://blog.csdn.net/yxstars/article/details/38080175 In the Mifare card, the energy and data are transmitted through the antenna, the antenna in the card is a few turns of the coil, directly connected to the chip, no longer require additional components. The coil is embedded in the plastic and forms a passive contactless card.Card reader to the IC to send a set of fixed frequency of electromag

speed up!4)The anti-conflict of typea requires a relatively high and accurate timing sequence on the card. Therefore, you need to add hardware to the card and reader separately, while the anti-conflict of typeB can be implemented by software. From the comparison above, we can see that the two technologies are difficult to say that they are superior or inferior, which is one of the reasons why the international ISO organization has determined the two standards. However, for public transit syste

text/Shing original Reprint Please specify the source http://blog.csdn.net/yxstars/article/details/38081241The Mifare IC chip contains EEPROM, RF interface and digital control unit.1. RF RF InterfaceIn the RF RF interface circuit, mainly includes the waveform conversion module. It can receive the 13.56MHZ radio modulation frequency on the card reader, on the one hand the modulation/demodulation module, on the other hand, the waveform conversion, t

==================================== At the beginning, the program was successfully received by referring to the examples of ouravr netizens. Because the Hex file generated by the program is too large to be 2051 loaded, it was just published on the

This article transfers from the text/ Shing original reprint please indicate the source http://blog.csdn.net/yxstars/article/details/ 380799 Depending on the way the signal is sent and received, Iso/iec14443-3 defines the TypeA, typeb two