mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-03-10 06:57:19 +08:00
minor changes to iso15693.c to get rid off all the compile warnings
This commit is contained in:
parent
ad2a97824d
commit
f7c64b570c
1 changed files with 82 additions and 118 deletions
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@ -21,12 +21,9 @@
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// to the FPGA, to transmit that command to the tag.
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//-----------------------------------------------------------------------------
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// The sampling rate is 106.353 ksps/s, for T = 18.8 us
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// SOF defined as
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// SOF defined as
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// 1) Unmodulated time of 56.64us
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// 2) 24 pulses of 423.75khz
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// 3) logic '1' (unmodulated for 18.88us followed by 8 pulses of 423.75khz)
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@ -54,7 +51,7 @@
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1, 1, 1, 1
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};
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// EOF defined as
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// EOF defined as
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// 1) logic '0' (8 pulses of 423.75khz followed by unmodulated for 18.88us)
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// 2) 24 pulses of 423.75khz
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// 3) Unmodulated time of 56.64us
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@ -70,9 +67,6 @@
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
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};
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static void CodeIso15693AsReader(BYTE *cmd, int n)
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{
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int i, j;
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@ -173,9 +167,19 @@ static WORD Crc(BYTE *v, int n)
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return ~reg;
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}
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////////////////////////////////////////// code to do 'itoa'
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char *strcat(char *dest, const char *src)
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{
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size_t dest_len = strlen(dest);
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size_t i;
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for (i = 0 ; src[i] != '\0' ; i++)
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dest[dest_len + i] = src[i];
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dest[dest_len + i] = '\0';
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return dest;
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}
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////////////////////////////////////////// code to do 'itoa'
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/* reverse: reverse string s in place */
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void reverse(char s[])
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@ -204,11 +208,10 @@ void itoa(int n, char s[])
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s[i++] = '-';
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s[i] = '\0';
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reverse(s);
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}
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}
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//////////////////////////////////////// END 'itoa' CODE
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//-----------------------------------------------------------------------------
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// Encode (into the ToSend buffers) an identify request, which is the first
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// thing that you must send to a tag to get a response.
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@ -220,7 +223,7 @@ static void BuildIdentifyRequest(void)
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WORD crc;
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// one sub-carrier, inventory, 1 slot, fast rate
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// AFI is at bit 5 (1<<4) when doing an INVENTORY
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cmd[0] = (1 << 2) | (1 << 5) | (1 << 1);
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cmd[0] = (1 << 2) | (1 << 5) | (1 << 1);
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// inventory command code
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cmd[1] = 0x01;
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// no mask
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@ -252,10 +255,10 @@ static void BuildSysInfoRequest(BYTE *uid)
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cmd[5] = 0x01;
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cmd[6] = 0x00;
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cmd[7] = 0x10;
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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//Now the CRC
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crc = Crc(cmd, 10); // the crc needs to be calculated over 2 bytes
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crc = Crc(cmd, 10); // the crc needs to be calculated over 2 bytes
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cmd[10] = crc & 0xff;
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cmd[11] = crc >> 8;
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@ -264,7 +267,7 @@ static void BuildSysInfoRequest(BYTE *uid)
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static void BuildSelectRequest( BYTE uid[])
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{
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// uid[6]=0x31; // this is getting ignored - the uid array is not happening...
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BYTE cmd[12];
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@ -281,20 +284,20 @@ static void BuildSelectRequest( BYTE uid[])
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// cmd[5] = uid[3];//0x01;
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// cmd[6] = uid[4];//0x00;
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// cmd[7] = uid[5];//0x10;
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// cmd[8] = uid[6];//0x05;
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// cmd[8] = uid[6];//0x05;
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cmd[2] = 0x32;//
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cmd[3]= 0x4b;
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cmd[3] = 0x4b;
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cmd[4] = 0x03;
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cmd[5] = 0x01;
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cmd[6] = 0x00;
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cmd[7] = 0x10;
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cmd[8] = 0x05; // infineon?
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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// DbpIntegers(cmd[8],cmd[7],cmd[6]);
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// Now the CRC
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crc = Crc(cmd, 10); // the crc needs to be calculated over 10 bytes
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crc = Crc(cmd, 10); // the crc needs to be calculated over 10 bytes
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cmd[10] = crc & 0xff;
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cmd[11] = crc >> 8;
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@ -320,19 +323,18 @@ static void BuildReadBlockRequest(BYTE *uid, BYTE blockNumber )
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cmd[5] = 0x01;
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cmd[6] = 0x00;
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cmd[7] = 0x10;
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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// Block number to read
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cmd[10] = blockNumber;//0x00;
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//Now the CRC
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crc = Crc(cmd, 11); // the crc needs to be calculated over 2 bytes
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crc = Crc(cmd, 11); // the crc needs to be calculated over 2 bytes
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cmd[11] = crc & 0xff;
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cmd[12] = crc >> 8;
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CodeIso15693AsReader(cmd, sizeof(cmd));
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}
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static void BuildReadMultiBlockRequest(BYTE *uid)
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{
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BYTE cmd[14];
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@ -352,14 +354,14 @@ static void BuildReadMultiBlockRequest(BYTE *uid)
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cmd[5] = 0x01;
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cmd[6] = 0x00;
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cmd[7] = 0x10;
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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// First Block number to read
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cmd[10] = 0x00;
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// Number of Blocks to read
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cmd[11] = 0x2f; // read quite a few
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//Now the CRC
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crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
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crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
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cmd[12] = crc & 0xff;
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cmd[13] = crc >> 8;
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@ -385,22 +387,22 @@ static void BuildArbitraryRequest(BYTE *uid,BYTE CmdCode)
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cmd[5] = 0x01;
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cmd[6] = 0x00;
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cmd[7] = 0x10;
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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// Parameter
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cmd[10] = 0x00;
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cmd[11] = 0x0a;
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// cmd[12] = 0x00;
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// cmd[13] = 0x00; //Now the CRC
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crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
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crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
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cmd[12] = crc & 0xff;
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cmd[13] = crc >> 8;
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CodeIso15693AsReader(cmd, sizeof(cmd));
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}
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static void BuildArbitraryCustomRequest(BYTE *uid,BYTE CmdCode)
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static void BuildArbitraryCustomRequest(BYTE uid[], BYTE CmdCode)
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{
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BYTE cmd[14];
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@ -419,15 +421,15 @@ static void BuildArbitraryCustomRequest(BYTE *uid,BYTE CmdCode)
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cmd[5] = 0x01;
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cmd[6] = 0x00;
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cmd[7] = 0x10;
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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cmd[8] = 0x05;
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cmd[9]= 0xe0; // always e0 (not exactly unique)
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// Parameter
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cmd[10] = 0x05; // for custom codes this must be manufcturer code
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cmd[11] = 0x00;
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// cmd[12] = 0x00;
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// cmd[13] = 0x00; //Now the CRC
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crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
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crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
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cmd[12] = crc & 0xff;
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cmd[13] = crc >> 8;
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@ -445,7 +447,7 @@ static void BuildArbitraryCustomRequest(BYTE *uid,BYTE CmdCode)
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WORD crc;
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// one sub-carrier, inventory, 1 slot, fast rate
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// AFI is at bit 5 (1<<4) when doing an INVENTORY
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cmd[0] = 0; //(1 << 2) | (1 << 5) | (1 << 1);
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cmd[0] = 0; //(1 << 2) | (1 << 5) | (1 << 1);
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cmd[1] = 0;
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// 64-bit UID
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cmd[2] = 0x32;
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@ -454,7 +456,7 @@ static void BuildArbitraryCustomRequest(BYTE *uid,BYTE CmdCode)
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cmd[5] = 0x01;
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cmd[6] = 0x00;
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cmd[7] = 0x10;
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cmd[8] = 0x05;
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cmd[8] = 0x05;
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cmd[9]= 0xe0;
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//Now the CRC
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crc = Crc(cmd, 10);
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@ -464,7 +466,6 @@ static void BuildArbitraryCustomRequest(BYTE *uid,BYTE CmdCode)
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CodeIso15693AsReader(cmd, sizeof(cmd));
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}
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//-----------------------------------------------------------------------------
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// Transmit the command (to the tag) that was placed in ToSend[].
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//-----------------------------------------------------------------------------
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@ -506,7 +507,6 @@ static void TransmitTo15693Tag(const BYTE *cmd, int len, int *samples, int *wait
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*samples = (c + *wait) << 3;
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}
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//-----------------------------------------------------------------------------
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// Transmit the command (to the reader) that was placed in ToSend[].
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//-----------------------------------------------------------------------------
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@ -536,18 +536,12 @@ static void TransmitTo15693Reader(const BYTE *cmd, int len, int *samples, int *w
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*samples = (c + *wait) << 3;
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}
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static int GetIso15693AnswerFromTag(BYTE *receivedResponse, int maxLen, int *samples, int *elapsed)
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static int GetIso15693AnswerFromTag(BYTE *receivedResponse, int maxLen, int *samples, int *elapsed)
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{
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int c = 0;
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BYTE *dest = (BYTE *)BigBuf;
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int getNext = 0;
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SBYTE prev = 0;
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// NOW READ RESPONSE
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@ -599,11 +593,10 @@ static int GetIso15693AnswerFromTag(BYTE *receivedResponse, int maxLen, int *sam
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//////////////////////////////////////////
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int i, j;
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int max = 0, maxPos;
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int max = 0, maxPos=0;
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int skip = 4;
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// if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL
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// First, correlate for SOF
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@ -622,11 +615,11 @@ static int GetIso15693AnswerFromTag(BYTE *receivedResponse, int maxLen, int *sam
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int k = 0; // this will be our return value
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// greg - If correlation is less than 1 then there's little point in continuing
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if ((max/(arraylen(FrameSOF)/skip)) >= 1)
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if ((max/(arraylen(FrameSOF)/skip)) >= 1)
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{
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i = maxPos + arraylen(FrameSOF)/skip;
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BYTE outBuf[20];
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memset(outBuf, 0, sizeof(outBuf));
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BYTE mask = 0x01;
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@ -681,23 +674,21 @@ static int GetIso15693AnswerFromTag(BYTE *receivedResponse, int maxLen, int *sam
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for(i = 0; i < k; i++) {
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receivedResponse[i] = outBuf[i];
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}
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}
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} // "end if correlation > 0" (max/(arraylen(FrameSOF)/skip))
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return k; // return the number of bytes demodulated
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/// DbpString("CRC=%04x", Iso15693Crc(outBuf, k-2));
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}
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// Now the GetISO15693 message from sniffing command
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static int GetIso15693AnswerFromSniff(BYTE *receivedResponse, int maxLen, int *samples, int *elapsed)
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static int GetIso15693AnswerFromSniff(BYTE *receivedResponse, int maxLen, int *samples, int *elapsed)
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{
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int c = 0;
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BYTE *dest = (BYTE *)BigBuf;
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int getNext = 0;
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SBYTE prev = 0;
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// NOW READ RESPONSE
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@ -749,11 +740,10 @@ static int GetIso15693AnswerFromSniff(BYTE *receivedResponse, int maxLen, int *s
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//////////////////////////////////////////
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int i, j;
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int max = 0, maxPos;
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int max = 0, maxPos=0;
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int skip = 4;
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// if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL
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// First, correlate for SOF
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@ -772,11 +762,11 @@ static int GetIso15693AnswerFromSniff(BYTE *receivedResponse, int maxLen, int *s
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int k = 0; // this will be our return value
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// greg - If correlation is less than 1 then there's little point in continuing
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if ((max/(arraylen(FrameSOF)/skip)) >= 1) // THIS SHOULD BE 1
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if ((max/(arraylen(FrameSOF)/skip)) >= 1) // THIS SHOULD BE 1
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{
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i = maxPos + arraylen(FrameSOF)/skip;
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BYTE outBuf[20];
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memset(outBuf, 0, sizeof(outBuf));
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BYTE mask = 0x01;
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@ -831,17 +821,13 @@ static int GetIso15693AnswerFromSniff(BYTE *receivedResponse, int maxLen, int *s
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for(i = 0; i < k; i++) {
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receivedResponse[i] = outBuf[i];
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}
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}
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} // "end if correlation > 0" (max/(arraylen(FrameSOF)/skip))
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return k; // return the number of bytes demodulated
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/// DbpString("CRC=%04x", Iso15693Crc(outBuf, k-2));
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}
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//-----------------------------------------------------------------------------
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// Start to read an ISO 15693 tag. We send an identify request, then wait
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// for the response. The response is not demodulated, just left in the buffer
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@ -927,8 +913,6 @@ void AcquireRawAdcSamplesIso15693(void)
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}
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}
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//-----------------------------------------------------------------------------
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// Simulate an ISO15693 reader, perform anti-collision and then attempt to read a sector
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// all demodulation performed in arm rather than host. - greg
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@ -940,15 +924,14 @@ void ReaderIso15693(DWORD parameter)
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LED_C_OFF();
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LED_D_OFF();
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//DbpString(parameter);
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BYTE *receivedAnswer0 = (((BYTE *)BigBuf) + 3560); // allow 100 bytes per reponse (way too much)
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BYTE *receivedAnswer1 = (((BYTE *)BigBuf) + 3660); //
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BYTE *receivedAnswer1 = (((BYTE *)BigBuf) + 3660); //
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BYTE *receivedAnswer2 = (((BYTE *)BigBuf) + 3760);
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BYTE *receivedAnswer3 = (((BYTE *)BigBuf) + 3860);
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//BYTE *TagUID= (((BYTE *)BigBuf) + 3960); // where we hold the uid for hi15reader
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int responseLen0 = 0;
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//BYTE *TagUID= (((BYTE *)BigBuf) + 3960); // where we hold the uid for hi15reader
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// int responseLen0 = 0;
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int responseLen1 = 0;
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int responseLen2 = 0;
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int responseLen3 = 0;
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@ -988,14 +971,13 @@ void ReaderIso15693(DWORD parameter)
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// FIRST WE RUN AN INVENTORY TO GET THE TAG UID
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// THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME
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BYTE TagUID[7]; // where we hold the uid for hi15reader
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BYTE TagUID[7]; // where we hold the uid for hi15reader
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// BuildIdentifyRequest();
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// //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
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// //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
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// TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
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// // Now wait for a response
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// responseLen0 = GetIso15693AnswerFromTag(receivedAnswer0, 100, &samples, &elapsed) ;
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// responseLen0 = GetIso15693AnswerFromTag(receivedAnswer0, 100, &samples, &elapsed) ;
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// if (responseLen0 >=12) // we should do a better check than this
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// {
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// // really we should check it is a valid mesg
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@ -1007,19 +989,19 @@ void ReaderIso15693(DWORD parameter)
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// TagUID[4] = receivedAnswer0[6];
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// TagUID[5] = receivedAnswer0[7];
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// TagUID[6] = receivedAnswer0[8]; // IC Manufacturer code
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// DbpIntegers(TagUID[6],TagUID[5],TagUID[4]);
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// DbpIntegers(TagUID[6],TagUID[5],TagUID[4]);
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//}
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// Now send the IDENTIFY command
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BuildIdentifyRequest();
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//TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
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//TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
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TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
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// Now wait for a response
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responseLen1 = GetIso15693AnswerFromTag(receivedAnswer1, 100, &samples, &elapsed) ;
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if (responseLen1 >=12) // we should do a better check than this
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{
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TagUID[0] = receivedAnswer1[2];
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TagUID[1] = receivedAnswer1[3];
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TagUID[2] = receivedAnswer1[4];
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@ -1027,28 +1009,26 @@ void ReaderIso15693(DWORD parameter)
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TagUID[4] = receivedAnswer1[6];
|
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TagUID[5] = receivedAnswer1[7];
|
||||
TagUID[6] = receivedAnswer1[8]; // IC Manufacturer code
|
||||
|
||||
|
||||
// Now send the SELECT command
|
||||
BuildSelectRequest(*TagUID);
|
||||
BuildSelectRequest(TagUID);
|
||||
TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
|
||||
// Now wait for a response
|
||||
responseLen2 = GetIso15693AnswerFromTag(receivedAnswer2, 100, &samples, &elapsed);
|
||||
responseLen2 = GetIso15693AnswerFromTag(receivedAnswer2, 100, &samples, &elapsed);
|
||||
|
||||
// Now send the MULTI READ command
|
||||
// BuildArbitraryRequest(*TagUID,parameter);
|
||||
BuildArbitraryCustomRequest(*TagUID,parameter);
|
||||
BuildArbitraryCustomRequest(TagUID,parameter);
|
||||
// BuildReadBlockRequest(*TagUID,parameter);
|
||||
// BuildSysInfoRequest(*TagUID);
|
||||
//TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
|
||||
TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
|
||||
//TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
|
||||
TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
|
||||
// Now wait for a response
|
||||
responseLen3 = GetIso15693AnswerFromTag(receivedAnswer3, 100, &samples, &elapsed) ;
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
BYTE str1 [4];
|
||||
char str1 [4];
|
||||
//char str2 [200];
|
||||
int i;
|
||||
|
||||
|
@ -1072,25 +1052,20 @@ void ReaderIso15693(DWORD parameter)
|
|||
for(i = 0; i < responseLen3; i+=3) {
|
||||
DbpIntegers(receivedAnswer3[i],receivedAnswer3[i+1],receivedAnswer3[i+2]);
|
||||
}
|
||||
|
||||
|
||||
// str2[0]=0;
|
||||
// for(i = 0; i < responseLen3; i++) {
|
||||
// itoa(str1,receivedAnswer3[i]);
|
||||
// strcat(str2,str1);
|
||||
// }
|
||||
// DbpString(str2);
|
||||
// DbpString(str2);
|
||||
|
||||
LED_A_OFF();
|
||||
LED_B_OFF();
|
||||
LED_C_OFF();
|
||||
LED_D_OFF();
|
||||
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
// Simulate an ISO15693 TAG, perform anti-collision and then print any reader commands
|
||||
// all demodulation performed in arm rather than host. - greg
|
||||
|
@ -1102,18 +1077,17 @@ void SimTagIso15693(DWORD parameter)
|
|||
LED_C_OFF();
|
||||
LED_D_OFF();
|
||||
|
||||
|
||||
//DbpString(parameter);
|
||||
|
||||
BYTE *receivedAnswer0 = (((BYTE *)BigBuf) + 3560); // allow 100 bytes per reponse (way too much)
|
||||
BYTE *receivedAnswer1 = (((BYTE *)BigBuf) + 3660); //
|
||||
BYTE *receivedAnswer1 = (((BYTE *)BigBuf) + 3660); //
|
||||
BYTE *receivedAnswer2 = (((BYTE *)BigBuf) + 3760);
|
||||
BYTE *receivedAnswer3 = (((BYTE *)BigBuf) + 3860);
|
||||
//BYTE *TagUID= (((BYTE *)BigBuf) + 3960); // where we hold the uid for hi15reader
|
||||
int responseLen0 = 0;
|
||||
//BYTE *TagUID= (((BYTE *)BigBuf) + 3960); // where we hold the uid for hi15reader
|
||||
// int responseLen0 = 0;
|
||||
int responseLen1 = 0;
|
||||
int responseLen2 = 0;
|
||||
int responseLen3 = 0;
|
||||
// int responseLen2 = 0;
|
||||
// int responseLen3 = 0;
|
||||
|
||||
// Blank arrays
|
||||
int j;
|
||||
|
@ -1150,41 +1124,34 @@ void SimTagIso15693(DWORD parameter)
|
|||
|
||||
// FIRST WE RUN AN INVENTORY TO GET THE TAG UID
|
||||
// THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME
|
||||
BYTE TagUID[7]; // where we hold the uid for hi15reader
|
||||
|
||||
|
||||
// BYTE TagUID[7]; // where we hold the uid for hi15reader
|
||||
|
||||
// Now send the IDENTIFY command
|
||||
// BuildIdentifyRequest();
|
||||
// TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
|
||||
|
||||
// BuildIdentifyRequest();
|
||||
// TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
|
||||
|
||||
// Now wait for a command from the reader
|
||||
responseLen1=0;
|
||||
// while(responseLen1=0) {
|
||||
// if(BUTTON_PRESS()) break;
|
||||
// while(responseLen1=0) {
|
||||
// if(BUTTON_PRESS()) break;
|
||||
responseLen1 = GetIso15693AnswerFromSniff(receivedAnswer1, 100, &samples, &elapsed) ;
|
||||
// }
|
||||
// }
|
||||
|
||||
|
||||
if (responseLen1 >=1) // we should do a better check than this
|
||||
{
|
||||
// Build a suitable reponse to the reader INVENTORY cocmmand
|
||||
BuildInventoryResponse;
|
||||
BuildInventoryResponse();
|
||||
TransmitTo15693Reader(ToSend,ToSendMax,&tsamples, &wait);
|
||||
|
||||
// Now wait for a command from the reader
|
||||
// responseLen2 = GetIso15693AnswerFromTag(receivedAnswer2, 100, &samples, &elapsed);
|
||||
// responseLen2 = GetIso15693AnswerFromTag(receivedAnswer2, 100, &samples, &elapsed);
|
||||
|
||||
|
||||
// Now wait for a command from the reader
|
||||
// responseLen3 = GetIso15693AnswerFromTag(receivedAnswer3, 100, &samples, &elapsed) ;
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
BYTE str1 [4];
|
||||
char str1 [4];
|
||||
//char str2 [200];
|
||||
int i;
|
||||
|
||||
|
@ -1208,19 +1175,16 @@ void SimTagIso15693(DWORD parameter)
|
|||
// for(i = 0; i < responseLen3; i+=3) {
|
||||
// DbpIntegers(receivedAnswer3[i],receivedAnswer3[i+1],receivedAnswer3[i+2]);
|
||||
// }
|
||||
|
||||
|
||||
// str2[0]=0;
|
||||
// for(i = 0; i < responseLen3; i++) {
|
||||
// itoa(str1,receivedAnswer3[i]);
|
||||
// strcat(str2,str1);
|
||||
// }
|
||||
// DbpString(str2);
|
||||
// DbpString(str2);
|
||||
|
||||
LED_A_OFF();
|
||||
LED_B_OFF();
|
||||
LED_C_OFF();
|
||||
LED_D_OFF();
|
||||
|
||||
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue