AN2284 datasheet(37/40 Pages) STMICROELECTRONICS

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AN2284

10 SC Reader Example

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SC_Handler (SC_SELECT_FILE, (u8 *) PrivateFile, NULL_PARAM,

NULL_PARAM,NULL_PARAM, &SC_state, &u16_status, response);

Once the selected path is accessed, the user has to define the 16bit offset where he wants to

read and the number of bytes he wants to read:

offset_low=1;

offset_high=0;

byte_number=3;

SC_Handler (SC_READ_BINARY, (u8 *) PrivateFile, byte_number, offset_high, offset_low,

&SC_state, &u16_status, response);

10.2.3 Writing a File at a Specified Path

Suppose the user wants to write the

PublicFile in the MasterRoot. He has to define the 16bits

offset where he wants to read and the number of bytes he wants to read.

In the example,

FileParamST array will store the sequence the user wants to write.

offset_low=1;

offset_high=0;

byte_number=18;

FileParamST[40]="SmartCardDemo";

SC_Handler (SC_UPDATE_BINARY, (u8 *) FileParamST, byte_number,

offset_high,offset_low, &SC_state, &u16_status, response);

10.2.4 Creating a File at a Specified Path

Suppose the user wants to create a file in the

MasterRoot.

SC_Handler (SC_SELECT_FILE, (u8 *) MasterRoot, NULL_PARAM, NULL_PARAM,

NULL_PARAM, &SC_state, &u16_status, card);

SC_Handler (SC_CREATE_FILE, (u8 *) PublicFile, 20,NULL_PARAM, NULL_PARAM,

&SC_state, &u16_status, response);

Where

20 is the size (in byte) of PublicFile.

10.2.5 Creating a File at a Specified Path With Pin Protection

Suppose the user wants to create a file in the

MasterRoot/PublicDir directory.

SC_Handler (SC_SELECT_FILE, (u8 *) MasterRoot, NULL_PARAM, NULL_PARAM,

NULL_PARAM, &SC_state, &u16_status, card);

SC_Handler (SC_CREATE_FILE, (u8 *) PublicDir, NULL_PARAM,

NULL_PARAM,NULL_PARAM, &SC_state, &u16_status, response);

SC_Handler (SC_SELECT_FILE, (u8 *) PublicDir, NULL_PARAM,

NULL_PARAM,NULL_PARAM, &SC_state, &u16_status, response);

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