RW_NDEF_T4T.c

/*
*         Copyright (c), NXP Semiconductors Caen / France
*
*                     (C)NXP Semiconductors
*       All rights are reserved. Reproduction in whole or in part is
*      prohibited without the written consent of the copyright owner.
*  NXP reserves the right to make changes without notice at any time.
* NXP makes no warranty, expressed, implied or statutory, including but
* not limited to any implied warranty of merchantability or fitness for any
*particular purpose, or that the use will not infringe any third party patent,
* copyright or trademark. NXP must not be liable for any loss or damage
*                          arising from its use.
*/

#ifdef RW_SUPPORT
#ifndef NO_NDEF_SUPPORT
#include <TML/inc/tool.h>
#include <NfcLibrary/NdefLibrary/inc/RW_NDEF.h>

const unsigned char RW_NDEF_T4T_APP_Select20[] = {0x00,0xA4,0x04,0x00,0x07,0xD2,0x76,0x00,0x00,0x85,0x01,0x01,0x00};
const unsigned char RW_NDEF_T4T_APP_Select10[] = {0x00,0xA4,0x04,0x00,0x07,0xD2,0x76,0x00,0x00,0x85,0x01,0x00};
const unsigned char RW_NDEF_T4T_CC_Select[] = {0x00,0xA4,0x00,0x0C,0x02,0xE1,0x03};
const unsigned char RW_NDEF_T4T_NDEF_Select[] = {0x00,0xA4,0x00,0x0C,0x02,0xE1,0x04};
const unsigned char RW_NDEF_T4T_Read[] = {0x00,0xB0,0x00,0x00,0x0F};
const unsigned char RW_NDEF_T4T_Write[] = {0x00,0xD6,0x00,0x00,0x00};

const unsigned char RW_NDEF_T4T_OK[] = {0x90, 0x00};

#define WRITE_SZ    54

typedef enum
{
    Initial,
    Selecting_NDEF_Application20,
    Selecting_NDEF_Application10,
    Selecting_CC,
    Reading_CC,
    Selecting_NDEF,
    Reading_NDEF_Size,
    Reading_NDEF,
    Writing_NDEF,
    Writing_NDEFsize,
    Write_NDEFcomplete
} RW_NDEF_T4T_state_t;

typedef struct
{
    unsigned char MappingVersion;
    unsigned short MLe;
    unsigned short MLc;
    unsigned char FileID[2];
    unsigned short MaxNdefFileSize;
    unsigned char RdAccess;
    unsigned char WrAccess;
    unsigned short MessagePtr;
    unsigned short MessageSize;
    unsigned char *pMessage;
} RW_NDEF_T4T_Ndef_t;

static RW_NDEF_T4T_state_t eRW_NDEF_T4T_State = Initial;
static RW_NDEF_T4T_Ndef_t RW_NDEF_T4T_Ndef;

void RW_NDEF_T4T_Reset(void)
{
    eRW_NDEF_T4T_State = Initial;
    RW_NDEF_T4T_Ndef.pMessage = NdefBuffer;
}

void RW_NDEF_T4T_Read_Next(unsigned char *pRsp, unsigned short Rsp_size, unsigned char *pCmd, unsigned short *pCmd_size)
{
    /* By default no further command to be sent */
    *pCmd_size = 0;

    switch(eRW_NDEF_T4T_State)
    {
    case Initial:
        /* Select NDEF Application in version 2.0 */
        memcpy(pCmd, RW_NDEF_T4T_APP_Select20, sizeof(RW_NDEF_T4T_APP_Select20));
        *pCmd_size = sizeof(RW_NDEF_T4T_APP_Select20);
        eRW_NDEF_T4T_State = Selecting_NDEF_Application20;
        break;

    case Selecting_NDEF_Application20:
        /* Is NDEF Application Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Select CC */
            memcpy(pCmd, RW_NDEF_T4T_CC_Select, sizeof(RW_NDEF_T4T_CC_Select));
            *pCmd_size = sizeof(RW_NDEF_T4T_CC_Select);
            eRW_NDEF_T4T_State = Selecting_CC;
        }
        else
        {
            /* Select NDEF Application in version 1.0 */
            memcpy(pCmd, RW_NDEF_T4T_APP_Select10, sizeof(RW_NDEF_T4T_APP_Select10));
            *pCmd_size = sizeof(RW_NDEF_T4T_APP_Select10);
            eRW_NDEF_T4T_State = Selecting_NDEF_Application10;
        }
        break;

    case Selecting_NDEF_Application10:
        /* Is NDEF Application Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Select CC */
            memcpy(pCmd, RW_NDEF_T4T_CC_Select, sizeof(RW_NDEF_T4T_CC_Select));
            pCmd[3] = 0x00;
            *pCmd_size = sizeof(RW_NDEF_T4T_CC_Select);
            eRW_NDEF_T4T_State = Selecting_CC;
        }
        break;

    case Selecting_CC:
        /* Is CC Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Read CC */
            memcpy(pCmd, RW_NDEF_T4T_Read, sizeof(RW_NDEF_T4T_Read));
            *pCmd_size = sizeof(RW_NDEF_T4T_Read);
            eRW_NDEF_T4T_State = Reading_CC;
        }
        break;

    case Reading_CC:
        /* Is CC Read ?*/
        if ((!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK))) && (Rsp_size == 15 + 2))
        {
            /* Fill CC structure */
            RW_NDEF_T4T_Ndef.MappingVersion = pRsp[2];
            RW_NDEF_T4T_Ndef.MLe = (pRsp[3] << 8) + pRsp[4];
            RW_NDEF_T4T_Ndef.MLc = (pRsp[5] << 8) + pRsp[6];
            RW_NDEF_T4T_Ndef.FileID[0] = pRsp[9];
            RW_NDEF_T4T_Ndef.FileID[1] = pRsp[10];
            RW_NDEF_T4T_Ndef.MaxNdefFileSize = (pRsp[11] << 8) + pRsp[12];
            RW_NDEF_T4T_Ndef.RdAccess = pRsp[13];
            RW_NDEF_T4T_Ndef.WrAccess = pRsp[14];
            
            /* Select NDEF */
            memcpy(pCmd, RW_NDEF_T4T_NDEF_Select, sizeof(RW_NDEF_T4T_NDEF_Select));
            if (RW_NDEF_T4T_Ndef.MappingVersion == 0x10) pCmd[3] = 0x00;
            pCmd[5] = RW_NDEF_T4T_Ndef.FileID[0];
            pCmd[6] = RW_NDEF_T4T_Ndef.FileID[1];
            *pCmd_size = sizeof(RW_NDEF_T4T_NDEF_Select);
            eRW_NDEF_T4T_State = Selecting_NDEF;
        }
        break;

    case Selecting_NDEF:
        /* Is NDEF Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Get NDEF file size */
            memcpy(pCmd, RW_NDEF_T4T_Read, sizeof(RW_NDEF_T4T_Read));
            *pCmd_size = sizeof(RW_NDEF_T4T_Read);
            pCmd[4] = 2;
            eRW_NDEF_T4T_State = Reading_NDEF_Size;
        }
        break;

    case Reading_NDEF_Size:
        /* Is Read Success ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            RW_NDEF_T4T_Ndef.MessageSize = (pRsp[0] << 8) + pRsp[1];

            /* If provisioned buffer is not large enough, notify the application and stop reading */
            if (RW_NDEF_T4T_Ndef.MessageSize > RW_MAX_NDEF_FILE_SIZE)
            {
                if(pRW_NDEF_PullCb != NULL) pRW_NDEF_PullCb(NULL, 0);
                break;
            }

            RW_NDEF_T4T_Ndef.MessagePtr = 0;

            /* Read NDEF data */
            memcpy(pCmd, RW_NDEF_T4T_Read, sizeof(RW_NDEF_T4T_Read));
            pCmd[3] =  2;
            pCmd[4] = (RW_NDEF_T4T_Ndef.MessageSize > RW_NDEF_T4T_Ndef.MLe-1) ? RW_NDEF_T4T_Ndef.MLe-1 : (unsigned char) RW_NDEF_T4T_Ndef.MessageSize;
            *pCmd_size = sizeof(RW_NDEF_T4T_Read);
            eRW_NDEF_T4T_State = Reading_NDEF;
        }
        break;

    case Reading_NDEF:
        /* Is Read Success ?*/
        //if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            memcpy(&RW_NDEF_T4T_Ndef.pMessage[RW_NDEF_T4T_Ndef.MessagePtr], pRsp, Rsp_size - 2);
            RW_NDEF_T4T_Ndef.MessagePtr += Rsp_size - 2;
            
            /* Is NDEF message read completed ?*/
            if (RW_NDEF_T4T_Ndef.MessagePtr == RW_NDEF_T4T_Ndef.MessageSize)
            {
                /* Notify application of the NDEF reception */
                if(pRW_NDEF_PullCb != NULL) pRW_NDEF_PullCb(RW_NDEF_T4T_Ndef.pMessage, RW_NDEF_T4T_Ndef.MessageSize);
            }
            else
            {
                /* Read NDEF data */
                memcpy(pCmd, RW_NDEF_T4T_Read, sizeof(RW_NDEF_T4T_Read));
                pCmd[3] =  RW_NDEF_T4T_Ndef.MessagePtr + 2;
                pCmd[4] = ((RW_NDEF_T4T_Ndef.MessageSize - RW_NDEF_T4T_Ndef.MessagePtr) > RW_NDEF_T4T_Ndef.MLe-1) ? RW_NDEF_T4T_Ndef.MLe-1 : (unsigned char) (RW_NDEF_T4T_Ndef.MessageSize - RW_NDEF_T4T_Ndef.MessagePtr);
                *pCmd_size = sizeof(RW_NDEF_T4T_Read);
            }
        }
        break;

    default:
        break;
    }
}

void RW_NDEF_T4T_Write_Next(unsigned char *pRsp, unsigned short Rsp_size, unsigned char *pCmd, unsigned short *pCmd_size)
{
    /* By default no further command to be sent */
    *pCmd_size = 0;

    switch(eRW_NDEF_T4T_State)
    {
    case Initial:
        /* Select NDEF Application in version 2.0 */
        memcpy(pCmd, RW_NDEF_T4T_APP_Select20, sizeof(RW_NDEF_T4T_APP_Select20));
        *pCmd_size = sizeof(RW_NDEF_T4T_APP_Select20);
        eRW_NDEF_T4T_State = Selecting_NDEF_Application20;
        break;

    case Selecting_NDEF_Application20:
        /* Is NDEF Application Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Select CC */
            memcpy(pCmd, RW_NDEF_T4T_CC_Select, sizeof(RW_NDEF_T4T_CC_Select));
            *pCmd_size = sizeof(RW_NDEF_T4T_CC_Select);
            eRW_NDEF_T4T_State = Selecting_CC;
        }
        else
        {
            /* Select NDEF Application in version 1.0 */
            memcpy(pCmd, RW_NDEF_T4T_APP_Select10, sizeof(RW_NDEF_T4T_APP_Select10));
            *pCmd_size = sizeof(RW_NDEF_T4T_APP_Select10);
            eRW_NDEF_T4T_State = Selecting_NDEF_Application10;
        }
        break;

    case Selecting_NDEF_Application10:
        /* Is NDEF Application Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Select CC */
            memcpy(pCmd, RW_NDEF_T4T_CC_Select, sizeof(RW_NDEF_T4T_CC_Select));
            pCmd[3] = 0x00;
            *pCmd_size = sizeof(RW_NDEF_T4T_CC_Select);
            eRW_NDEF_T4T_State = Selecting_CC;
        }
        break;

    case Selecting_CC:
        /* Is CC Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Read CC */
            memcpy(pCmd, RW_NDEF_T4T_Read, sizeof(RW_NDEF_T4T_Read));
            *pCmd_size = sizeof(RW_NDEF_T4T_Read);
            eRW_NDEF_T4T_State = Reading_CC;
        }
        break;

    case Reading_CC:
        /* Is CC Read ?*/
        if ((!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK))) && (Rsp_size == 15 + 2))
        {
            /* Fill CC structure */
            RW_NDEF_T4T_Ndef.MappingVersion = pRsp[2];
            RW_NDEF_T4T_Ndef.MLe = (pRsp[3] << 8) + pRsp[4];
            RW_NDEF_T4T_Ndef.MLc = (pRsp[5] << 8) + pRsp[6];
            RW_NDEF_T4T_Ndef.FileID[0] = pRsp[9];
            RW_NDEF_T4T_Ndef.FileID[1] = pRsp[10];
            RW_NDEF_T4T_Ndef.MaxNdefFileSize = (pRsp[11] << 8) + pRsp[12];
            RW_NDEF_T4T_Ndef.RdAccess = pRsp[13];
            RW_NDEF_T4T_Ndef.WrAccess = pRsp[14];

            /* Select NDEF */
            memcpy(pCmd, RW_NDEF_T4T_NDEF_Select, sizeof(RW_NDEF_T4T_NDEF_Select));
            if (RW_NDEF_T4T_Ndef.MappingVersion == 0x10) pCmd[3] = 0x00;
            pCmd[5] = RW_NDEF_T4T_Ndef.FileID[0];
            pCmd[6] = RW_NDEF_T4T_Ndef.FileID[1];
            *pCmd_size = sizeof(RW_NDEF_T4T_NDEF_Select);
            eRW_NDEF_T4T_State = Selecting_NDEF;
        }
        break;

    case Selecting_NDEF:
        /* Is NDEF Selected ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Clearing NDEF message size*/
            memcpy(pCmd, RW_NDEF_T4T_Write, sizeof(RW_NDEF_T4T_Write));
            pCmd[4] = 2;
            pCmd[5] = 0;
            pCmd[6] = 0;
            *pCmd_size = sizeof(RW_NDEF_T4T_Write) + 2;
            RW_NDEF_T4T_Ndef.MessagePtr = 0;
            eRW_NDEF_T4T_State = Writing_NDEF;
        }
        break;

    case Writing_NDEF:
        /* Is Write Success ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Writing NDEF message */
            memcpy(pCmd, RW_NDEF_T4T_Write, sizeof(RW_NDEF_T4T_Write));
            pCmd[2] = (RW_NDEF_T4T_Ndef.MessagePtr + 2) >> 8;
            pCmd[3] = (RW_NDEF_T4T_Ndef.MessagePtr + 2) & 0xFF;
            if((RW_NdefMessage_size - RW_NDEF_T4T_Ndef.MessagePtr) < WRITE_SZ)
            {
                pCmd[4] = (RW_NdefMessage_size - RW_NDEF_T4T_Ndef.MessagePtr);
                memcpy(&pCmd[5], pRW_NdefMessage + RW_NDEF_T4T_Ndef.MessagePtr, (RW_NdefMessage_size - RW_NDEF_T4T_Ndef.MessagePtr));
                *pCmd_size = sizeof(RW_NDEF_T4T_Write) + (RW_NdefMessage_size - RW_NDEF_T4T_Ndef.MessagePtr);
                eRW_NDEF_T4T_State = Writing_NDEFsize;
            }
            else
            {
                pCmd[4] = WRITE_SZ;
                memcpy(&pCmd[5], pRW_NdefMessage + RW_NDEF_T4T_Ndef.MessagePtr, WRITE_SZ);
                *pCmd_size = sizeof(RW_NDEF_T4T_Write) + WRITE_SZ;
                RW_NDEF_T4T_Ndef.MessagePtr += WRITE_SZ;
                eRW_NDEF_T4T_State = Writing_NDEF;
            }
        }
        break;

    case Writing_NDEFsize:
        /* Is Write Success ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            memcpy(pCmd, RW_NDEF_T4T_Write, sizeof(RW_NDEF_T4T_Write));
            pCmd[4] = 2;
            pCmd[5] = RW_NdefMessage_size >> 8;
            pCmd[6] = RW_NdefMessage_size & 0xFF;
            *pCmd_size = sizeof(RW_NDEF_T4T_Write) + 2;
            eRW_NDEF_T4T_State = Write_NDEFcomplete;
        }
        break;

    case Write_NDEFcomplete:
        /* Is Write Success ?*/
        if (!memcmp(&pRsp[Rsp_size - 2], RW_NDEF_T4T_OK, sizeof(RW_NDEF_T4T_OK)))
        {
            /* Notify application of the NDEF reception */
            if(pRW_NDEF_PushCb != NULL) pRW_NDEF_PushCb(pRW_NdefMessage, RW_NdefMessage_size);
        }
        break;

    default:
        break;
    }
}

#endif
#endif