uint16_t READ_GAP;
} T55xx_Timing;
-
-
// Set Initial/Default Values. Note: *8 can occure when used. This should keep things simplier here.
T55xx_Timing T55xx_Timing_FixedBit = { 31 * 8 , 20 * 8 , 18 * 8 , 50 * 8 , 0 , 0 , 15 * 8 };
T55xx_Timing T55xx_Timing_LLR = { 31 * 8 , 20 * 8 , 18 * 8 , 50 * 8 , 0 , 0 , 15 * 8 };
T55xx_Timing T55xx_Timing_Leading0 = { 31 * 8 , 20 * 8 , 18 * 8 , 40 * 8 , 0 , 0 , 15 * 8 };
T55xx_Timing T55xx_Timing_1of4 = { 31 * 8 , 20 * 8 , 18 * 8 , 34 * 8 , 50 * 8 , 66 * 8 , 15 * 8 };
-
// Some defines for readability
#define T55xx_DLMode_Fixed 0 // Default Mode
#define T55xx_DLMode_LLR 1 // Long Leading Reference
#define T55xx_DLMode_Leading0 2 // Leading Zero
#define T55xx_DLMode_1of4 3 // 1 of 4
#define T55xx_LongLeadingReference 4 // Value to tell Write Bit to send long reference
+// Macro for code readability
+#define BitStream_Byte(X) ((X) >> 3)
+#define BitStream_Bit(X) ((X) & 7)
+
void TurnReadLFOn(int delay) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
void T55xxWriteBit(int bit, T55xx_Timing *Timings) {
// If bit = 4 Send Long Leading Reference which is 138 + WRITE_0
-
+ // Dbprintf ("Bits : %d",bit);
switch (bit){
case 0 : TurnReadLFOn(Timings->WRITE_0); break; // Send bit 0/00
case 1 : TurnReadLFOn(Timings->WRITE_1); break; // Send bit 1/01
WaitUS(Timings->WRITE_GAP);
}
-
// Function to abstract an Arbitrary length byte array to store bit pattern.
// bit_array - Array to hold data/bit pattern
// start_offset - bit location to start storing new bits.
// num_bits - how many bits (low x bits of data) Max 32 bits at a time
// max_len - how many bytes can the bit_array hold (ensure no buffer overflow)
// returns "Next" bit offset / bits stored (for next store)
-int T55xx_SetBits (uint8_t *bit_array, int start_offset, uint32_t data , int num_bits, int max_len)
+//int T55xx_SetBits (uint8_t *bit_array, int start_offset, uint32_t data , int num_bits, int max_len)
+int T55xx_SetBits (uint8_t *BitStream, uint8_t start_offset, uint32_t data , uint8_t num_bits, uint8_t max_len)
{
- int bit,byte_idx, bit_idx;
- int offset;
- int NextOffset = start_offset;
+ int8_t offset;
+ int8_t NextOffset = start_offset;
// Check if data will fit.
- if ((start_offset + num_bits) <= (max_len*8)) {
-
+ if ((start_offset + num_bits) <= (max_len*8)) {
// Loop through the data and store
for (offset = (num_bits-1); offset >= 0; offset--) {
-
- bit = (data >> offset) & 1; // Get data bit value (0/1)
- byte_idx = (NextOffset / 8); // Get Array Byte Index to Store
- bit_idx = NextOffset - (byte_idx * 8); // Get Bit Index to set/clr
-
- // If set (1) we OR, if clear (0) we AND with inverse
- // Dbprintf ("Add Bit : %d at byte %d bit %d",bit,byte_idx,bit_idx);
- if (bit == 1)
- bit_array[byte_idx] |= (1 << bit_idx); // Set the bit to 1
-
- else
- bit_array[byte_idx] &= (0xff ^ (1 << bit_idx)); // Set the bit to 0 (clr)
-
- NextOffset++;
- }
- }
- else
- Dbprintf ("Too Many Bits to fit into bit buffer");
- return NextOffset;
-}
-
-// Send T5577 reset command then read stream (see if we can identify the start of the stream)
-void T55xxResetRead(void) {
- LED_A_ON();
- //clear buffer now so it does not interfere with timing later
- BigBuf_Clear_keep_EM();
-
- // Set up FPGA, 125kHz
- LFSetupFPGAForADC(95, true);
- StartTicks();
- // make sure tag is fully powered up...
- WaitMS(5);
-
- // Trigger T55x7 in mode.
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- WaitUS(T55xx_Timing_FixedBit.START_GAP);
-
- // reset tag - op code 00
- T55xxWriteBit(0,&T55xx_Timing_FixedBit);
- T55xxWriteBit(0,&T55xx_Timing_FixedBit);
-
- TurnReadLFOn(T55xx_Timing_FixedBit.READ_GAP);
- // Acquisition
- DoPartialAcquisition(0, true, BigBuf_max_traceLen(), 0);
+ if ((data >> offset) & 1) BitStream[BitStream_Byte(NextOffset)] |= (1 << BitStream_Bit(NextOffset)); // Set the bit to 1
+ else BitStream[BitStream_Byte(NextOffset)] &= (0xff ^ (1 << BitStream_Bit(NextOffset))); // Set the bit to 0
- // Turn the field off
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
- cmd_send(CMD_ACK,0,0,0,0,0);
- LED_A_OFF();
+ NextOffset++;
+ }
+ }
+ else{
+ // Note: This should never happen unless some code changes cause it.
+ // So short message for coders when testing.
+ Dbprintf ("T55 too many bits");
+ }
+ return NextOffset;
}
// Send one downlink command to the card
-void T55xx_SendCMD (uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) { //, bool read_cmd) {//, struct T55xx_Timing *Timing) {
+void T55xx_SendCMD (uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
/*
arg bits
xxxxxx1x 0x02 Page
xxxxx1xx 0x04 testMode
xxx11xxx 0x18 downlink mode
- xx1xxxxx 0x20 reg_readmode
+ xx1xxxxx 0x20 !reg_readmode
x1xxxxxx 0x40 called for a read, so no data packet
-
+ 1xxxxxxx 0x80 reset
+
*/
bool PwdMode = ((arg & 0x01) == 0x01);
- uint8_t Page = (arg & 0x02) >> 1;
+ bool Page = (arg & 0x02);
bool testMode = ((arg & 0x04) == 0x04);
- uint8_t downlink_mode = (arg >> 3) & 0x03;;
+ uint8_t downlink_mode = (arg >> 3) & 0x03;
bool reg_readmode = ((arg & 0x20) == 0x20);
bool read_cmd = ((arg & 0x40) == 0x40);
-
- int i = 0;
- uint8_t BitStream[10]; // Max Downlink Command size ~75 bits, so 10 bytes (80 bits)
+ bool reset = (arg & 0x80);
+
+ uint8_t i = 0;
+ uint8_t BitStream[10]; // Max Downlink Command size ~74 bits, so 10 bytes (80 bits)
uint8_t BitStreamLen;
- int byte_idx, bit_idx;
T55xx_Timing *Timing;
+ uint8_t SendBits;
-
// Assigning Downlink Timeing for write
switch (downlink_mode)
{
if (downlink_mode == T55xx_DLMode_1of4)
BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, 0, 1,sizeof(BitStream));
- // Add Opcode
- if (testMode) Dbprintf("TestMODE");
- BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen,testMode ? 0 : 1 , 1,sizeof(BitStream));
- BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen,testMode ? 1 : Page , 1,sizeof(BitStream));
+ // Add Opcode
+ if (reset) {
+ // Reset : r*) 00
+ BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, 0, 2,sizeof(BitStream));
+ }
+ else
+ {
+ if (testMode) Dbprintf("TestMODE");
+ BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen,testMode ? 0 : 1 , 1,sizeof(BitStream));
+ BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen,testMode ? 1 : Page , 1,sizeof(BitStream));
- if (PwdMode) {
-
- // Leading 0 and 1 of 4 00 fixed bits if passsword used
- if ((downlink_mode == T55xx_DLMode_Leading0) || (downlink_mode == T55xx_DLMode_1of4)) {
- BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, 0, 1,sizeof(BitStream));
- BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, 0, 1,sizeof(BitStream));
- }
- BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, Pwd, 32,sizeof(BitStream));
-
- }
- // Add Lock bit
- BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, 0, 1,sizeof(BitStream));
-
- // Add Data if a write command
- if (!read_cmd) BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, Data, 32,sizeof(BitStream));
-
- // Add Address
- if (!reg_readmode) BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, Block, 3,sizeof(BitStream));
-
-
-
+ if (PwdMode) {
+ // Leading 0 and 1 of 4 00 fixed bits if passsword used
+ if ((downlink_mode == T55xx_DLMode_Leading0) || (downlink_mode == T55xx_DLMode_1of4)) {
+ BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, 0, 2,sizeof(BitStream));
+ }
+ BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, Pwd, 32,sizeof(BitStream));
+ }
+
+ // Add Lock bit 0
+ if (!reg_readmode) BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, 0, 1,sizeof(BitStream));
+
+ // Add Data if a write command
+ if (!read_cmd) BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, Data, 32,sizeof(BitStream));
+
+ // Add Address
+ if (!reg_readmode) BitStreamLen = T55xx_SetBits (BitStream, BitStreamLen, Block, 3,sizeof(BitStream));
+ }
+
// Send Bits to T55xx
-
// Set up FPGA, 125kHz
LFSetupFPGAForADC(95, true);
StartTicks();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
WaitUS(Timing->START_GAP);
-
// If long leading 0 send long reference pulse
if (downlink_mode == T55xx_DLMode_LLR)
T55xxWriteBit (T55xx_LongLeadingReference,Timing); // Send Long Leading Start Reference
- uint8_t SendBits;
-
if (downlink_mode == T55xx_DLMode_1of4) { // 1 of 4 need to send 2 bits at a time
- for (i = 0; i < BitStreamLen; i+=2) {
- byte_idx = i / 8;
- bit_idx = i - (byte_idx * 8);
- SendBits = ((BitStream[byte_idx] >> bit_idx) & 1) << 1;
-
- byte_idx = (i+1) / 8;
- bit_idx = (i+1) - (byte_idx * 8);
- SendBits += (BitStream[byte_idx] >> bit_idx) & 1;
-
- T55xxWriteBit (SendBits,Timing);
+ for ( i = 0; i < BitStreamLen; i+=2 ) {
+ SendBits = (BitStream[BitStream_Byte(i )] >> (BitStream_Bit(i )) & 1) << 1; // Bit i
+ SendBits += (BitStream[BitStream_Byte(i+1)] >> (BitStream_Bit(i+1)) & 1); // Bit i+1;
+ T55xxWriteBit (SendBits & 3,Timing);
}
}
else {
for (i = 0; i < BitStreamLen; i++) {
- byte_idx = i / 8;
- bit_idx = i - (byte_idx * 8);
- SendBits = (BitStream[byte_idx] >> bit_idx) & 1;
- T55xxWriteBit (SendBits,Timing);
+ SendBits = (BitStream[BitStream_Byte(i)] >> BitStream_Bit(i));
+ T55xxWriteBit (SendBits & 1,Timing);
}
}
-
+}
+
+// Send T5577 reset command then read stream (see if we can identify the start of the stream)
+void T55xxResetRead(void) {
+ LED_A_ON();
+
+ // send r* 00
+ uint8_t arg = 0x80; // SendCMD will add correct reference mode based on flags (when added).
+
+ // Add in downlink_mode when ready
+ // arg |= 0x00; // dlmode << 3 (00 default - 08 leading 0 - 10 Fixed - 18 1 of 4 )
+
+ T55xx_SendCMD (0, 0, 0, arg); //, true);
+
+ // Acquisition
+ DoPartialAcquisition(0, true, BigBuf_max_traceLen(), 0);
+
+ // Turn the field off
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+ cmd_send(CMD_ACK,0,0,0,0,0);
+ LED_A_OFF();
}
// Write one card block in page 0, no lock
xxxxxx1x 0x02 Page
xxxxx1xx 0x04 testMode
xxx11xxx 0x18 downlink mode
- xx1xxxxx 0x20 reg_readmode
+ xx1xxxxx 0x20 !reg_readmode
x1xxxxxx 0x40 called for a read, so no data packet
+ 1xxxxxxx 0x80 reset
*/
bool testMode = ((arg & 0x04) == 0x04);
xxxxxx1x 0x02 Page
xxxxx1xx 0x04 testMode
xxx11xxx 0x18 downlink mode
- xx1xxxxx 0x20 reg_readmode
+ xx1xxxxx 0x20 !reg_readmode
x1xxxxxx 0x40 called for a read, so no data packet
+ 1xxxxxxx 0x80 reset
*/
// Set Read Flag to ensure SendCMD does not add "data" to the packet
arg0 |= 0x40;
-
+ // RegRead Mode true of block 0xff
if (Block == 0xff) arg0 |= 0x20;
//make sure block is at max 7
BigBuf_Clear_ext(false);
T55xx_SendCMD (0, Block, Pwd, arg0); //, true);
-
-/*
-// the send has been moved to the above SendCMD Call
-=======
- // Set up FPGA, 125kHz to power up the tag
- LFSetupFPGAForADC(95, true);
- StartTicks();
- // make sure tag is fully powered up...
- WaitMS(5);
- // Trigger T55x7 Direct Access Mode with start gap
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- WaitUS(START_GAP);
-
- // Opcode 1[page]
- T55xxWriteBit(1);
- T55xxWriteBit(Page); //Page 0
-
- if (PwdMode) {
- // Send Pwd
- for (i = 0x80000000; i != 0; i >>= 1)
- T55xxWriteBit(Pwd & i);
- }
- // Send a zero bit separation
- T55xxWriteBit(0);
-
- // Send Block number (if direct access mode)
- if (!RegReadMode)
- for (i = 0x04; i != 0; i >>= 1)
- T55xxWriteBit(Block & i);
-
-
-*/
// Turn field on to read the response
// 137*8 seems to get to the start of data pretty well...
// but we want to go past the start and let the repeating data settle in...
void T55xxWakeUp(uint32_t Pwd){
LED_B_ON();
- uint32_t i = 0;
-
- // Set up FPGA, 125kHz
- LFSetupFPGAForADC(95, true);
- StartTicks();
- // make sure tag is fully powered up...
- WaitMS(5);
-
- // Trigger T55x7 Direct Access Mode
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- WaitUS(T55xx_Timing_FixedBit.START_GAP);
-
- // Opcode 10
- T55xxWriteBit(1,&T55xx_Timing_FixedBit);
- T55xxWriteBit(0,&T55xx_Timing_FixedBit); //Page 0
-
- // Send Pwd
+ /*
+ arg bits
+ xxxxxxx1 0x01 PwdMode
+ xxxxxx1x 0x02 Page
+ xxxxx1xx 0x04 testMode
+ xxx11xxx 0x18 downlink mode
+ xx1xxxxx 0x20 !reg_readmode
+ x1xxxxxx 0x40 called for a read, so no data packet
+ 1xxxxxxx 0x80 reset
+ */
- for (i = 0x80000000; i != 0; i >>= 1)
- T55xxWriteBit(Pwd & i,&T55xx_Timing_FixedBit);
+ // r* 10 (00) <pwd> r* for llr , L0 and 1/4 - (00) for L0 and 1/4 - All handled in SendCMD
+ // So, default Opcode 10 and pwd.
+ uint8_t arg = 0x01 | 0x40 | 0x20; //Password Read Call no data | reg_read no block
+
+ // Add in downlink_mode when ready
+ // arg |= 0x00; // dlmode << 3 (00 default - 08 leading 0 - 10 Fixed - 18 1 of 4 )
+
+ T55xx_SendCMD (0, 0, Pwd, arg); //, true);
// Turn and leave field on to let the begin repeating transmission
TurnReadLFOn(20*1000);
projects / proxmark3-svn / blobdiff