BOOL q5_read_block(BYTE *response, BYTE block)
{
BYTE tmp[39], retry, reset= FALSE;
if(block > Q5_DATABLOCKS - 1)
return FALSE;
// create 6 or 38 bit command block: Q5_DIRECT_ACCESS + PWD_Mode + [PWD] + 3 bits address
memset(tmp, '\0', 39);
memcpy(tmp, Q5_DIRECT_ACCESS, 2);
if(PWD_Mode)
{
tmp[2]= '1';
hextobinstring(tmp + 3, Password);
inttobinstring(tmp + 34, (unsigned int) block, 3);
}
else
{
tmp[2]= '0';
inttobinstring(tmp + 3, (unsigned int) block, 3);
}
retry= RFIDlerConfig.Repeat;
while(retry--)
{
//DEBUG_PIN_4= !DEBUG_PIN_4;
//DEBUG_PIN_4= !DEBUG_PIN_4;
if(q5_send_command(response, tmp, strlen(tmp), reset, NO_SYNC, 32))
return TRUE;
// try resetting tag
reset= TRUE;
}
return FALSE;
}
// optional verify as writing config block may casue next read to fail
BOOL q5_write_block(BYTE block, BYTE *data, BOOL lock, BOOL verify)
{
BYTE tmp[71], p;
if(block > Q5_DATABLOCKS - 1)
return FALSE;
// create 38 or 70 bit command block: Q5_STD_WRITE_P0 + [PWD] + Lock Bit + 32 bits Data + 3 bits address
memset(tmp, '\0', sizeof(tmp));
// command
memcpy(tmp, Q5_STD_WRITE_P0, 2);
p= 2;
// password
if(PWD_Mode)
{
hextobinstring(tmp + p, Password);
p += 32;
}
// lockbit
inttobinstring(tmp + p, (unsigned int) lock, 1);
++p;
// data
hextobinstring(tmp + p, data);
p += Q5_BLOCKSIZE;
// address
inttobinstring(tmp + p, (unsigned int) block, 3);
p += 3;
// send
if(!q5_send_command(NULL, tmp, strlen(tmp), NO_RESET, NO_SYNC, 0))
return FALSE;
// no ack, so read back and verify
// delay for long enough to allow write plus TX->RX period
Delay_us((Q5_WRITE_DELAY * RFIDlerConfig.FrameClock + RFIDlerConfig.RWD_Wait_Switch_TX_RX * RFIDlerConfig.FrameClock) / 100L);
if(!verify)
return TRUE;
if(!q5_read_block(tmp, block))
return FALSE;
if(memcmp(tmp, data, HEXDIGITS(Q5_BLOCKSIZE)) != 0)
return FALSE;
return TRUE;
}
// read page - 32 bits
// pages 2 - 15 are probably not readable!
BOOL hitag1_read_page(BYTE *response, BYTE block)
{
BYTE tmp[HITAG1_BLOCKSIZE + 6]; // 32 bits plus 6 sync bits
if(block > HITAG1_DATABLOCKS - 1)
return FALSE;
// get tag's UID for select command
if(!hitag1_get_uid(tmp))
return FALSE;
// select for read/write
hitag1_select(tmp, tmp);
// create 12 bit command block: HITAG1_RDPPAGE + 8 bits address
strcpy(tmp, HITAG1_RDPPAGE);
inttobinstring(tmp + 4, (unsigned int) block, 8);
tmp[12]= '\0';
// ??? docs say 6 sync bits!
if(!hitag1_send_command(tmp, tmp, NO_RESET, NO_SYNC, HITAG1_BLOCKSIZE + 1, NO_ACK))
return FALSE;
// check sync
if(tmp[0] != 0x01)
return FALSE;
binarraytohex(response, tmp + 1, HITAG1_BLOCKSIZE);
return TRUE;
}
BOOL hitag1_write_page(BYTE block, BYTE *data)
{
BYTE crc, command[21], tmp[33], tmp1[4];
if(block > HITAG1_DATABLOCKS - 1)
return FALSE;
// get tag's UID for select command
if(!hitag1_get_uid(tmp))
return FALSE;
// select for read/write
hitag1_select(tmp, tmp);
// convert data to binstring for send
if(hextobinstring(tmp, data) != 32)
return FALSE;
// create and send 12 bit command block: HITAG1_WRPPAGE (4 bits) + 8 bit address
memcpy(command, HITAG1_WRPPAGE, 4);
inttobinstring(command + 4, (unsigned int) block, 8);
command[12]= '\0';
if(!hitag1_send_command(tmp1, command, NO_RESET, NO_SYNC, 0, ACK))
return FALSE;
// delay to switch back to write mode
Delay_us((RFIDlerConfig.RWD_Wait_Switch_RX_TX * RFIDlerConfig.FrameClock) / 100);
// now send data
if(!hitag1_send_command(tmp1, tmp, NO_RESET, NO_SYNC, 0, ACK))
return FALSE;
// read back and verify
// delay for long enough to allow write plus RX->TX period
Delay_us((HITAG1_WRITE_DELAY * RFIDlerConfig.FrameClock + RFIDlerConfig.RWD_Wait_Switch_RX_TX * RFIDlerConfig.FrameClock) / 100);
if(!hitag1_read_page(tmp, block))
return FALSE;
if(memcmp(tmp, data, 8) != 0)
return FALSE;
return TRUE;
}
BOOL hitag2_read_page(BYTE *response, BYTE block)
{
BYTE tmp[37];
if(block > HITAG2_DATABLOCKS - 1)
return FALSE;
// create 10 bit command block: HITAG2_READ_PAGE + 3 bits address + invert(HITAG2_READ_PAGE + 3 bits address)
memcpy(tmp, HITAG2_READ_PAGE, 2);
inttobinstring(tmp + 2, (unsigned int) block, 3);
invertbinstring(tmp + 5, tmp);
tmp[10]= '\0';
// encrypt command if in crypto mode
if(CryptoActive)
hitag2_binstring_crypt(tmp, tmp);
// send with RX->TX delay and no reset
if(!rwd_send(tmp, strlen(tmp), NO_RESET, BLOCK, RWD_STATE_WAKING, RFIDlerConfig.FrameClock, 0, RFIDlerConfig.RWD_Wait_Switch_RX_TX, RFIDlerConfig.RWD_Zero_Period, RFIDlerConfig.RWD_One_Period, RFIDlerConfig.RWD_Gap_Period, RFIDlerConfig.RWD_Wait_Switch_TX_RX))
return FALSE;
// skip 1/2 bit to synchronise manchester
HW_Skip_Bits= 1;
if(read_ask_data(RFIDlerConfig.FrameClock, RFIDlerConfig.DataRate, tmp, 37, RFIDlerConfig.Sync, RFIDlerConfig.SyncBits, RFIDlerConfig.Timeout, ONESHOT_READ, BINARY) == 37)
{
// check sync bits
if (memcmp(tmp, Hitag2Sync, 5) != 0)
return FALSE;
binarraytohex(response, tmp + 5, 32);
// decrypt
if(CryptoActive)
return hitag2_hex_crypt(response, response);
return TRUE;
}
return FALSE;
}
BOOL hitag2_write_page(BYTE block, BYTE *data)
{
BYTE command[11], tmp[37], tmp1[37], tmp2[37], tmphex[9];
if(block > HITAG2_DATABLOCKS - 1)
return FALSE;
// create 10 bit command block: HITAG2_WRIE_PAGE + 3 bits address + invert(HITAG2_WRITE_PAGE + 3 bits address)
memcpy(command, HITAG2_WRITE_PAGE, 2);
inttobinstring(command + 2, (unsigned int) block, 3);
invertbinstring(command + 5, command);
command[10]= '\0';
// encrypt command if in crypto mode
if(CryptoActive)
hitag2_binstring_crypt(tmp, command);
else
memcpy(tmp, command, 11);
// convert data to binstring for send
if(hextobinstring(tmp1, data) != 32)
return FALSE;
// send command with RX->TX delay and no reset
if(!rwd_send(tmp, strlen(tmp), NO_RESET, BLOCK, RWD_STATE_WAKING, RFIDlerConfig.FrameClock, 0, RFIDlerConfig.RWD_Wait_Switch_RX_TX, RFIDlerConfig.RWD_Zero_Period, RFIDlerConfig.RWD_One_Period, RFIDlerConfig.RWD_Gap_Period, RFIDlerConfig.RWD_Wait_Switch_TX_RX))
return FALSE;
// skip 1/2 bit to synchronise manchester
HW_Skip_Bits= 1;
// get ACK - 10 bytes + sync
if(read_ask_data(RFIDlerConfig.FrameClock, RFIDlerConfig.DataRate, tmp2, 15, RFIDlerConfig.Sync, RFIDlerConfig.SyncBits, RFIDlerConfig.Timeout, ONESHOT_READ, BINARY) == 15)
{
// check sync bits
if (memcmp(tmp2, Hitag2Sync, 5) != 0)
return FALSE;
// decrypt
if(CryptoActive)
hitag2_binarray_crypt(tmp2 + 5, tmp2 + 5, 10);
// check ACK - should be our original command echo'd back
binarraytobinstring(tmp2 + 5, tmp2 + 5, 10);
if(memcmp(command, tmp2 + 5, 10) != 0)
return FALSE;
}
// encrypt data if in crypto mode
if(CryptoActive)
hitag2_binstring_crypt(tmp1, tmp1);
// send data with RX->TX delay and no reset
if(!rwd_send(tmp1, strlen(tmp1), NO_RESET, BLOCK, RWD_STATE_WAKING, RFIDlerConfig.FrameClock, 0, RFIDlerConfig.RWD_Wait_Switch_RX_TX, RFIDlerConfig.RWD_Zero_Period, RFIDlerConfig.RWD_One_Period, RFIDlerConfig.RWD_Gap_Period, RFIDlerConfig.RWD_Wait_Switch_TX_RX))
return FALSE;
// no ack, so read back and verify
// delay for long enough to allow write plus RX->TX period
Delay_us((HITAG2_WRITE_DELAY * RFIDlerConfig.FrameClock + RFIDlerConfig.RWD_Wait_Switch_RX_TX * RFIDlerConfig.FrameClock) / 100);
if(!hitag2_read_page(tmp, block))
return FALSE;
if(memcmp(tmp, data, 8) != 0)
return FALSE;
return TRUE;
}
