Stm32 Study Notes 2--rc522

Rc522 has been studying for four or five days. Today, I am barely aware of what is going on. The results are summarized as follows:

I. Operation Procedure of rc522:

650) This. width = 650; "style =" float: none; "Title =" IMG 11111111.png "src =" http://s3.51cto.com/wyfs02/M00/45/CE/wKiom1PrgQ_zvLjvAABR3-c3050394.jpg "alt =" wKiom1PrgQ_zvLjvAABR3-c3050394.jpg "/> 650) This. width = 650; "style =" float: none; "Title =" image 1231213.jpg "src =" http://s3.51cto.com/wyfs02/M01/45/CF/wKioL1PrgieTd5FYAACeXmmrHlo736.jpg "alt =" wkiol1prgietd5fyaacexmmrhlo736.jpg "/>

Ii. M1 card introduction:

1.16 sectors, each of which is divided into four

2. Blocks 0, 1 and 2 for each sector are data blocks, and block 3 is the control block.

3. 0th slice Block 0 is fixed by the manufacturer and cannot be changed

 

Iii. M1 card read/write:

Reading and writing are the same. First, define the storage array for reading and writing. Read writes data in the block to an empty array, read writes the value of the pre-assigned array to the block.

Unsigned char RFID [16]; // read

Unsigned charrfid1 [16] = {0, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0}; // write

Status = pcdread (S, RFID); // read, S is a block

Status = pcdwrite (S, rfid1); // write