#include "crc16.h"
#include "string.h"
-void AcquireRawAdcSamples125k(int at134khz)
+void LFSetupFPGAForADC(int divisor, bool lf_field)
{
- if (at134khz)
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+ if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
- else
+ else if (divisor == 0)
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+ else
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor);
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | (lf_field ? FPGA_LF_ADC_READER_FIELD : 0));
// Connect the A/D to the peak-detected low-frequency path.
SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-
// Give it a bit of time for the resonant antenna to settle.
SpinDelay(50);
-
// Now set up the SSC to get the ADC samples that are now streaming at us.
FpgaSetupSsc();
+}
+
+void AcquireRawAdcSamples125k(int divisor)
+{
+ LFSetupFPGAForADC(divisor, true);
+ DoAcquisition125k(-1);
+}
- // Now call the acquisition routine
- DoAcquisition125k();
+void SnoopLFRawAdcSamples(int divisor, int trigger_threshold)
+{
+ LFSetupFPGAForADC(divisor, false);
+ DoAcquisition125k(trigger_threshold);
}
// split into two routines so we can avoid timing issues after sending commands //
-void DoAcquisition125k(void)
+void DoAcquisition125k(int trigger_threshold)
{
uint8_t *dest = (uint8_t *)BigBuf;
int n = sizeof(BigBuf);
}
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
- i++;
LED_D_OFF();
- if (i >= n) break;
+ if (trigger_threshold != -1 && dest[i] < trigger_threshold)
+ continue;
+ else
+ trigger_threshold = -1;
+ if (++i >= n) break;
}
}
Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...",
int at134khz;
/* Make sure the tag is reset */
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelay(2500);
else
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Give it a bit of time for the resonant antenna to settle.
SpinDelay(50);
else
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
LED_D_ON();
if(*(command++) == '0')
SpinDelayUs(period_0);
else
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// now do the read
- DoAcquisition125k();
+ DoAcquisition125k(-1);
}
/* blank r/w tag data stream
uint32_t threshold = (sampleslo - sampleshi + 1)>>1;
// TI tags charge at 134.2Khz
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
// Place FPGA in passthrough mode, in this mode the CROSS_LO line
// if not provided a valid crc will be computed from the data and written.
void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
{
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
if(crc == 0) {
crc = update_crc16(crc, (idlo)&0xff);
crc = update_crc16(crc, (idlo>>8)&0xff);
int i;
uint8_t *tab = (uint8_t *)BigBuf;
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;
int m=0, n=0, i=0, idx=0, found=0, lastval=0;
uint32_t hi2=0, hi=0, lo=0;
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Connect the A/D to the peak-detected low-frequency path.
SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
}
}
+void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
+{
+ uint8_t *dest = (uint8_t *)BigBuf;
+ int m=0, n=0, i=0, idx=0, lastval=0;
+ int found=0;
+ uint32_t code=0, code2=0;
+ //uint32_t hi2=0, hi=0, lo=0;
+
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+
+ // Connect the A/D to the peak-detected low-frequency path.
+ SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
+
+ // Give it a bit of time for the resonant antenna to settle.
+ SpinDelay(50);
+
+ // Now set up the SSC to get the ADC samples that are now streaming at us.
+ FpgaSetupSsc();
+
+ for(;;) {
+ WDT_HIT();
+ if (ledcontrol)
+ LED_A_ON();
+ if(BUTTON_PRESS()) {
+ DbpString("Stopped");
+ if (ledcontrol)
+ LED_A_OFF();
+ return;
+ }
+
+ i = 0;
+ m = sizeof(BigBuf);
+ memset(dest,128,m);
+ for(;;) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = 0x43;
+ if (ledcontrol)
+ LED_D_ON();
+ }
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+ // we don't care about actual value, only if it's more or less than a
+ // threshold essentially we capture zero crossings for later analysis
+ if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
+ i++;
+ if (ledcontrol)
+ LED_D_OFF();
+ if(i >= m) {
+ break;
+ }
+ }
+ }
+
+ // FSK demodulator
+
+ // sync to first lo-hi transition
+ for( idx=1; idx<m; idx++) {
+ if (dest[idx-1]<dest[idx])
+ lastval=idx;
+ break;
+ }
+ WDT_HIT();
+
+ // count cycles between consecutive lo-hi transitions, there should be either 8 (fc/8)
+ // or 10 (fc/10) cycles but in practice due to noise etc we may end up with with anywhere
+ // between 7 to 11 cycles so fuzz it by treat anything <9 as 8 and anything else as 10
+ for( i=0; idx<m; idx++) {
+ if (dest[idx-1]<dest[idx]) {
+ dest[i]=idx-lastval;
+ if (dest[i] <= 8) {
+ dest[i]=1;
+ } else {
+ dest[i]=0;
+ }
+
+ lastval=idx;
+ i++;
+ }
+ }
+ m=i;
+ WDT_HIT();
+
+ // we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
+ lastval=dest[0];
+ idx=0;
+ i=0;
+ n=0;
+ for( idx=0; idx<m; idx++) {
+ if (dest[idx]==lastval) {
+ n++;
+ } else {
+ // a bit time is five fc/10 or six fc/8 cycles so figure out how many bits a pattern width represents,
+ // an extra fc/8 pattern preceeds every 4 bits (about 200 cycles) just to complicate things but it gets
+ // swallowed up by rounding
+ // expected results are 1 or 2 bits, any more and it's an invalid manchester encoding
+ // special start of frame markers use invalid manchester states (no transitions) by using sequences
+ // like 111000
+ if (dest[idx-1]) {
+ n=(n+1)/7; // fc/8 in sets of 7
+ } else {
+ n=(n+1)/6; // fc/10 in sets of 6
+ }
+ if (n < 13){
+ for(int j=0; j<n; j++){
+ dest[i++]=dest[idx-1]^1;
+ }
+ }
+ n=0;
+ lastval=dest[idx];
+ }
+ }//end for
+ m=i;
+ WDT_HIT();
+
+ uint8_t mask[] = {0,0,0,0,0,0,0,0,0,1};
+ for( idx=0; idx < m - 64; idx++) {
+
+ if ( memcmp(dest + idx, mask, sizeof(mask)) ) continue;
+ found=1;
+ m=idx;
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx], dest[idx+1], dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7]);
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+8], dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15]);
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+16],dest[idx+17],dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23]);
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+24],dest[idx+25],dest[idx+26],dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31]);
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35],dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39]);
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44],dest[idx+45],dest[idx+46],dest[idx+47]);
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53],dest[idx+54],dest[idx+55]);
+ Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
+
+ short version='\x00';
+ char unknown='\x00';
+ uint16_t number=0;
+ for(int j=14;j<18;j++){
+ //Dbprintf("%d",dest[idx+j]);
+ version <<=1;
+ if (dest[idx+j]) version |= 1;
+ }
+ for(int j=18;j<26;j++){
+ //Dbprintf("%d",dest[idx+j]);
+ unknown <<=1;
+ if (dest[idx+j]) unknown |= 1;
+ }
+ for(int j=36;j<45;j++){
+ //Dbprintf("%d",dest[idx+j]);
+ number <<=1;
+ if (dest[idx+j]) number |= 1;
+ }
+ for(int j=46;j<53;j++){
+ //Dbprintf("%d",dest[idx+j]);
+ number <<=1;
+ if (dest[idx+j]) number |= 1;
+ }
+ for(int j=0; j<32; j++){
+ code <<=1;
+ if(dest[idx+j]) code |= 1;
+ }
+ for(int j=32; j<64; j++){
+ code2 <<=1;
+ if(dest[idx+j]) code2 |= 1;
+ }
+
+ Dbprintf("XSF(%02d)%02x:%d (%08x%08x)",version,unknown,number,code,code2);
+ if (ledcontrol)
+ LED_D_OFF();
+ }
+ // if we're only looking for one tag
+ if (found){
+ //*high = hi;
+ //*low = lo;
+ LED_A_OFF();
+ return;
+ }
+
+ found=0;
+ }
+ WDT_HIT();
+}
+
/*------------------------------
* T5555/T5557/T5567 routines
*------------------------------
// Write one bit to card
void T55xxWriteBit(int bit)
{
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
if (bit == 0)
SpinDelayUs(WRITE_0);
else
{
unsigned int i;
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Give it a bit of time for the resonant antenna to settle.
// And for the tag to fully power up
// Now perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
// so wait a little more)
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
SpinDelay(20);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
}
uint8_t *dest = (uint8_t *)BigBuf;
int m=0, i=0;
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
m = sizeof(BigBuf);
// Clear destination buffer before sending the command
memset(dest, 128, m);
LED_D_ON();
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Give it a bit of time for the resonant antenna to settle.
// And for the tag to fully power up
// Turn field on to read the response
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Now do the acquisition
i = 0;
uint8_t *dest = (uint8_t *)BigBuf;
int m=0, i=0;
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
m = sizeof(BigBuf);
// Clear destination buffer before sending the command
memset(dest, 128, m);
LED_D_ON();
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Give it a bit of time for the resonant antenna to settle.
// And for the tag to fully power up
// Turn field on to read the response
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Now do the acquisition
i = 0;
DbpString("DONE!");
}
+void CopyIOtoT55x7(uint32_t hi, uint32_t lo, uint8_t longFMT)
+{
+ int data1=0, data2=0; //up to six blocks for long format
+
+ data1 = hi; // load preamble
+ data2 = lo;
+
+ LED_D_ON();
+ // Program the data blocks for supplied ID
+ // and the block 0 for HID format
+ T55xxWriteBlock(data1,1,0,0);
+ T55xxWriteBlock(data2,2,0,0);
+
+ //Config Block
+ T55xxWriteBlock(0x00147040,0,0,0);
+ LED_D_OFF();
+
+ DbpString("DONE!");
+}
+
// Define 9bit header for EM410x tags
#define EM410X_HEADER 0x1FF
#define EM410X_ID_LENGTH 40
LED_D_ON();
//Field on
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Give it a bit of time for the resonant antenna to settle.
// And for the tag to fully power up
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
SpinDelayUs(55*8); //55 cycles off (8us each)for 4305
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);//field on
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
SpinDelayUs(16*8); //16 cycles on (8us each)
// now start writting
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
SpinDelayUs(23*8); //16-4 cycles off (8us each)
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);//field on
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
SpinDelayUs(9*8); //16 cycles on (8us each)
}
}
projects / proxmark3-svn / blobdiff