AS3955 datasheet(96/111 Pages) AMSCO

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Page 96

ams Datasheet

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[v1-01] 2015-Apr-29

AS3955 − Application Information

s8 ndefReadFile (u8 * rxPtr, u8 hdrLen)

{

s8 err = ERR_NONE;

if (filePtr != NULL)

{

// read from file

u16 offset = (*(rxPtr + 1) << 8) | *(rxPtr + 2);

u8 length = *(rxPtr + 3);

memcpy(&txBuffer.data[hdrLen], filePtr + offset, length);

txBuffer.data[hdrLen + length] = 0x90;

txBuffer.data[hdrLen + length + 1] = 0x00;

txBuffer.size = hdrLen + length + 2;

}

else

{

txBuffer.data[hdrLen + 0] = 0x6a;

txBuffer.data[hdrLen + 1] = 0x82;

err = ERR_PARAM;

}

return err;

}

s8 ndefWriteFile (u8 * rxPtr)

{

s8 err = ERR_NONE;

if (filePtr != NULL)

{

//write to file

u16 offset = (*(rxPtr + 1) << 8) | *(rxPtr + 2);

u8 length = *(rxPtr + 3);

memcpy(filePtr + offset, rxPtr + 4, length);

}

else

{

err = ERR_PARAM;

}

return err;

}

s8 ndefSelectFile (u8 * rxPtr)

{

s8 err = ERR_NONE;

filePtr = NULL;

if (*(rxPtr + 3) == 0x02)

{

// ID size == 2 -> files

if (*(rxPtr + 4) == 0xE1)

{

switch (*(rxPtr + 5))

{

AS3955 데이터시트(PDF) 96 Page - ams AG

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