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proxmark3/armsrc/lfops.c
marshmellow42 217cfb6b29 fix lf search bugs when no tag is on antenna 
cotag read could enter endless loop, now cancels if the next bit doesn't
appear

em4x05 detection would loop due to a threshold never being met, now has
a dump out after 1000 samples tested.

fixed some indenting in hitag2 while i was reviewing that code for
potential endless loops...
2017-11-10 15:57:55 -05:00

1790 lines
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//-----------------------------------------------------------------------------
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Miscellaneous routines for low frequency tag operations.
// Tags supported here so far are Texas Instruments (TI), HID
// Also routines for raw mode reading/simulating of LF waveform
//-----------------------------------------------------------------------------
#include "proxmark3.h"
#include "apps.h"
#include "util.h"
#include "hitag2.h"
#include "crc16.h"
#include "string.h"
#include "lfdemod.h"
#include "lfsampling.h"
#include "protocols.h"
#include "usb_cdc.h" // for usb_poll_validate_length
/**
* Function to do a modulation and then get samples.
* @param delay_off
* @param period_0
* @param period_1
* @param command
*/
void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint32_t period_1, uint8_t *command)
{
int divisor_used = 95; // 125 KHz
// see if 'h' was specified
if (command[strlen((char *) command) - 1] == 'h')
divisor_used = 88; // 134.8 KHz
sample_config sc = { 0,0,1, divisor_used, 0};
setSamplingConfig(&sc);
//clear read buffer
BigBuf_Clear_keep_EM();
/* Make sure the tag is reset */
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelay(2500);
LFSetupFPGAForADC(sc.divisor, 1);
// And a little more time for the tag to fully power up
SpinDelay(2000);
// now modulate the reader field
while(*command != '\0' && *command != ' ') {
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_D_OFF();
SpinDelayUs(delay_off);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
LED_D_ON();
if(*(command++) == '0')
SpinDelayUs(period_0);
else
SpinDelayUs(period_1);
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_D_OFF();
SpinDelayUs(delay_off);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// now do the read
DoAcquisition_config(false, 0);
}
/* blank r/w tag data stream
...0000000000000000 01111111
1010101010101010101010101010101010101010101010101010101010101010
0011010010100001
01111111
101010101010101[0]000...
[5555fe852c5555555555555555fe0000]
*/
void ReadTItag(void)
{
// some hardcoded initial params
// when we read a TI tag we sample the zerocross line at 2Mhz
// TI tags modulate a 1 as 16 cycles of 123.2Khz
// TI tags modulate a 0 as 16 cycles of 134.2Khz
#define FSAMPLE 2000000
#define FREQLO 123200
#define FREQHI 134200
signed char *dest = (signed char *)BigBuf_get_addr();
uint16_t n = BigBuf_max_traceLen();
// 128 bit shift register [shift3:shift2:shift1:shift0]
uint32_t shift3 = 0, shift2 = 0, shift1 = 0, shift0 = 0;
int i, cycles=0, samples=0;
// how many sample points fit in 16 cycles of each frequency
uint32_t sampleslo = (FSAMPLE<<4)/FREQLO, sampleshi = (FSAMPLE<<4)/FREQHI;
// when to tell if we're close enough to one freq or another
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
// connects to SSP_DIN and the SSP_DOUT logic level controls
// whether we're modulating the antenna (high)
// or listening to the antenna (low)
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU);
// get TI tag data into the buffer
AcquireTiType();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
for (i=0; i<n-1; i++) {
// count cycles by looking for lo to hi zero crossings
if ( (dest[i]<0) && (dest[i+1]>0) ) {
cycles++;
// after 16 cycles, measure the frequency
if (cycles>15) {
cycles=0;
samples=i-samples; // number of samples in these 16 cycles
// TI bits are coming to us lsb first so shift them
// right through our 128 bit right shift register
shift0 = (shift0>>1) | (shift1 << 31);
shift1 = (shift1>>1) | (shift2 << 31);
shift2 = (shift2>>1) | (shift3 << 31);
shift3 >>= 1;
// check if the cycles fall close to the number
// expected for either the low or high frequency
if ( (samples>(sampleslo-threshold)) && (samples<(sampleslo+threshold)) ) {
// low frequency represents a 1
shift3 |= (1<<31);
} else if ( (samples>(sampleshi-threshold)) && (samples<(sampleshi+threshold)) ) {
// high frequency represents a 0
} else {
// probably detected a gay waveform or noise
// use this as gaydar or discard shift register and start again
shift3 = shift2 = shift1 = shift0 = 0;
}
samples = i;
// for each bit we receive, test if we've detected a valid tag
// if we see 17 zeroes followed by 6 ones, we might have a tag
// remember the bits are backwards
if ( ((shift0 & 0x7fffff) == 0x7e0000) ) {
// if start and end bytes match, we have a tag so break out of the loop
if ( ((shift0>>16)&0xff) == ((shift3>>8)&0xff) ) {
cycles = 0xF0B; //use this as a flag (ugly but whatever)
break;
}
}
}
}
}
// if flag is set we have a tag
if (cycles!=0xF0B) {
DbpString("Info: No valid tag detected.");
} else {
// put 64 bit data into shift1 and shift0
shift0 = (shift0>>24) | (shift1 << 8);
shift1 = (shift1>>24) | (shift2 << 8);
// align 16 bit crc into lower half of shift2
shift2 = ((shift2>>24) | (shift3 << 8)) & 0x0ffff;
// if r/w tag, check ident match
if (shift3 & (1<<15) ) {
DbpString("Info: TI tag is rewriteable");
// only 15 bits compare, last bit of ident is not valid
if (((shift3 >> 16) ^ shift0) & 0x7fff ) {
DbpString("Error: Ident mismatch!");
} else {
DbpString("Info: TI tag ident is valid");
}
} else {
DbpString("Info: TI tag is readonly");
}
// WARNING the order of the bytes in which we calc crc below needs checking
// i'm 99% sure the crc algorithm is correct, but it may need to eat the
// bytes in reverse or something
// calculate CRC
uint32_t crc=0;
crc = update_crc16(crc, (shift0)&0xff);
crc = update_crc16(crc, (shift0>>8)&0xff);
crc = update_crc16(crc, (shift0>>16)&0xff);
crc = update_crc16(crc, (shift0>>24)&0xff);
crc = update_crc16(crc, (shift1)&0xff);
crc = update_crc16(crc, (shift1>>8)&0xff);
crc = update_crc16(crc, (shift1>>16)&0xff);
crc = update_crc16(crc, (shift1>>24)&0xff);
Dbprintf("Info: Tag data: %x%08x, crc=%x",
(unsigned int)shift1, (unsigned int)shift0, (unsigned int)shift2 & 0xFFFF);
if (crc != (shift2&0xffff)) {
Dbprintf("Error: CRC mismatch, expected %x", (unsigned int)crc);
} else {
DbpString("Info: CRC is good");
}
}
}
void WriteTIbyte(uint8_t b)
{
int i = 0;
// modulate 8 bits out to the antenna
for (i=0; i<8; i++)
{
if (b&(1<<i)) {
// stop modulating antenna
LOW(GPIO_SSC_DOUT);
SpinDelayUs(1000);
// modulate antenna
HIGH(GPIO_SSC_DOUT);
SpinDelayUs(1000);
} else {
// stop modulating antenna
LOW(GPIO_SSC_DOUT);
SpinDelayUs(300);
// modulate antenna
HIGH(GPIO_SSC_DOUT);
SpinDelayUs(1700);
}
}
}
void AcquireTiType(void)
{
int i, j, n;
// tag transmission is <20ms, sampling at 2M gives us 40K samples max
// each sample is 1 bit stuffed into a uint32_t so we need 1250 uint32_t
#define TIBUFLEN 1250
// clear buffer
uint32_t *BigBuf = (uint32_t *)BigBuf_get_addr();
BigBuf_Clear_ext(false);
// Set up the synchronous serial port
AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DIN;
AT91C_BASE_PIOA->PIO_ASR = GPIO_SSC_DIN;
// steal this pin from the SSP and use it to control the modulation
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
AT91C_BASE_SSC->SSC_CR = AT91C_SSC_RXEN | AT91C_SSC_TXEN;
// Sample at 2 Mbit/s, so TI tags are 16.2 vs. 14.9 clocks long
// 48/2 = 24 MHz clock must be divided by 12
AT91C_BASE_SSC->SSC_CMR = 12;
AT91C_BASE_SSC->SSC_RCMR = SSC_CLOCK_MODE_SELECT(0);
AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(32) | AT91C_SSC_MSBF;
AT91C_BASE_SSC->SSC_TCMR = 0;
AT91C_BASE_SSC->SSC_TFMR = 0;
LED_D_ON();
// modulate antenna
HIGH(GPIO_SSC_DOUT);
// Charge TI tag for 50ms.
SpinDelay(50);
// stop modulating antenna and listen
LOW(GPIO_SSC_DOUT);
LED_D_OFF();
i = 0;
for(;;) {
if(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
BigBuf[i] = AT91C_BASE_SSC->SSC_RHR; // store 32 bit values in buffer
i++; if(i >= TIBUFLEN) break;
}
WDT_HIT();
}
// return stolen pin to SSP
AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_ASR = GPIO_SSC_DIN | GPIO_SSC_DOUT;
char *dest = (char *)BigBuf_get_addr();
n = TIBUFLEN*32;
// unpack buffer
for (i=TIBUFLEN-1; i>=0; i--) {
for (j=0; j<32; j++) {
if(BigBuf[i] & (1 << j)) {
dest[--n] = 1;
} else {
dest[--n] = -1;
}
}
}
}
// arguments: 64bit data split into 32bit idhi:idlo and optional 16bit crc
// if crc provided, it will be written with the data verbatim (even if bogus)
// 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);
crc = update_crc16(crc, (idlo>>16)&0xff);
crc = update_crc16(crc, (idlo>>24)&0xff);
crc = update_crc16(crc, (idhi)&0xff);
crc = update_crc16(crc, (idhi>>8)&0xff);
crc = update_crc16(crc, (idhi>>16)&0xff);
crc = update_crc16(crc, (idhi>>24)&0xff);
}
Dbprintf("Writing to tag: %x%08x, crc=%x",
(unsigned int) idhi, (unsigned int) idlo, crc);
// TI tags charge at 134.2Khz
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
// Place FPGA in passthrough mode, in this mode the CROSS_LO line
// connects to SSP_DIN and the SSP_DOUT logic level controls
// whether we're modulating the antenna (high)
// or listening to the antenna (low)
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU);
LED_A_ON();
// steal this pin from the SSP and use it to control the modulation
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
// writing algorithm:
// a high bit consists of a field off for 1ms and field on for 1ms
// a low bit consists of a field off for 0.3ms and field on for 1.7ms
// initiate a charge time of 50ms (field on) then immediately start writing bits
// start by writing 0xBB (keyword) and 0xEB (password)
// then write 80 bits of data (or 64 bit data + 16 bit crc if you prefer)
// finally end with 0x0300 (write frame)
// all data is sent lsb firts
// finish with 15ms programming time
// modulate antenna
HIGH(GPIO_SSC_DOUT);
SpinDelay(50); // charge time
WriteTIbyte(0xbb); // keyword
WriteTIbyte(0xeb); // password
WriteTIbyte( (idlo )&0xff );
WriteTIbyte( (idlo>>8 )&0xff );
WriteTIbyte( (idlo>>16)&0xff );
WriteTIbyte( (idlo>>24)&0xff );
WriteTIbyte( (idhi )&0xff );
WriteTIbyte( (idhi>>8 )&0xff );
WriteTIbyte( (idhi>>16)&0xff );
WriteTIbyte( (idhi>>24)&0xff ); // data hi to lo
WriteTIbyte( (crc )&0xff ); // crc lo
WriteTIbyte( (crc>>8 )&0xff ); // crc hi
WriteTIbyte(0x00); // write frame lo
WriteTIbyte(0x03); // write frame hi
HIGH(GPIO_SSC_DOUT);
SpinDelay(50); // programming time
LED_A_OFF();
// get TI tag data into the buffer
AcquireTiType();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
DbpString("Now use `lf ti read` to check");
}
void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
{
int i;
uint8_t *tab = BigBuf_get_addr();
//note FpgaDownloadAndGo destroys the bigbuf so be sure this is called before now...
//FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;
AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
#define SHORT_COIL() LOW(GPIO_SSC_DOUT)
#define OPEN_COIL() HIGH(GPIO_SSC_DOUT)
i = 0;
for(;;) {
//wait until SSC_CLK goes HIGH
int ii = 0;
while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
//only check every 1000th time (usb_poll_validate_length on some systems was too slow)
if ( ii == 1000 ) {
if (BUTTON_PRESS() || usb_poll_validate_length() ) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
DbpString("Stopped");
return;
}
ii=0;
}
WDT_HIT();
ii++;
}
if (ledcontrol)
LED_D_ON();
if(tab[i])
OPEN_COIL();
else
SHORT_COIL();
if (ledcontrol)
LED_D_OFF();
ii=0;
//wait until SSC_CLK goes LOW
while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
//only check every 1000th time (usb_poll_validate_length on some systems was too slow)
if ( ii == 1000 ) {
if (BUTTON_PRESS() || usb_poll_validate_length() ) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
DbpString("Stopped");
return;
}
ii=0;
}
WDT_HIT();
ii++;
}
i++;
if(i == period) {
i = 0;
if (gap) {
SHORT_COIL();
SpinDelayUs(gap);
}
}
}
}
#define DEBUG_FRAME_CONTENTS 1
void SimulateTagLowFrequencyBidir(int divisor, int t0)
{
}
// compose fc/8 fc/10 waveform (FSK2)
static void fc(int c, int *n)
{
uint8_t *dest = BigBuf_get_addr();
int idx;
// for when we want an fc8 pattern every 4 logical bits
if(c==0) {
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
}
// an fc/8 encoded bit is a bit pattern of 11110000 x6 = 48 samples
if(c==8) {
for (idx=0; idx<6; idx++) {
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
}
}
// an fc/10 encoded bit is a bit pattern of 1111100000 x5 = 50 samples
if(c==10) {
for (idx=0; idx<5; idx++) {
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=1;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
dest[((*n)++)]=0;
}
}
}
// compose fc/X fc/Y waveform (FSKx)
static void fcAll(uint8_t fc, int *n, uint8_t clock, uint16_t *modCnt)
{
uint8_t *dest = BigBuf_get_addr();
uint8_t halfFC = fc/2;
uint8_t wavesPerClock = clock/fc;
uint8_t mod = clock % fc; //modifier
uint8_t modAdj = fc/mod; //how often to apply modifier
bool modAdjOk = !(fc % mod); //if (fc % mod==0) modAdjOk=TRUE;
// loop through clock - step field clock
for (uint8_t idx=0; idx < wavesPerClock; idx++){
// put 1/2 FC length 1's and 1/2 0's per field clock wave (to create the wave)
memset(dest+(*n), 0, fc-halfFC); //in case of odd number use extra here
memset(dest+(*n)+(fc-halfFC), 1, halfFC);
*n += fc;
}
if (mod>0) (*modCnt)++;
if ((mod>0) && modAdjOk){ //fsk2
if ((*modCnt % modAdj) == 0){ //if 4th 8 length wave in a rf/50 add extra 8 length wave
memset(dest+(*n), 0, fc-halfFC);
memset(dest+(*n)+(fc-halfFC), 1, halfFC);
*n += fc;
}
}
if (mod>0 && !modAdjOk){ //fsk1
memset(dest+(*n), 0, mod-(mod/2));
memset(dest+(*n)+(mod-(mod/2)), 1, mod/2);
*n += mod;
}
}
// prepare a waveform pattern in the buffer based on the ID given then
// simulate a HID tag until the button is pressed
void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
{
int n=0, i=0;
/*
HID tag bitstream format
The tag contains a 44bit unique code. This is sent out MSB first in sets of 4 bits
A 1 bit is represented as 6 fc8 and 5 fc10 patterns
A 0 bit is represented as 5 fc10 and 6 fc8 patterns
A fc8 is inserted before every 4 bits
A special start of frame pattern is used consisting a0b0 where a and b are neither 0
nor 1 bits, they are special patterns (a = set of 12 fc8 and b = set of 10 fc10)
*/
if (hi>0xFFF) {
DbpString("Tags can only have 44 bits. - USE lf simfsk for larger tags");
return;
}
// set LF so we don't kill the bigbuf we are setting with simulation data.
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
fc(0,&n);
// special start of frame marker containing invalid bit sequences
fc(8, &n); fc(8, &n); // invalid
fc(8, &n); fc(10, &n); // logical 0
fc(10, &n); fc(10, &n); // invalid
fc(8, &n); fc(10, &n); // logical 0
WDT_HIT();
// manchester encode bits 43 to 32
for (i=11; i>=0; i--) {
if ((i%4)==3) fc(0,&n);
if ((hi>>i)&1) {
fc(10, &n); fc(8, &n); // low-high transition
} else {
fc(8, &n); fc(10, &n); // high-low transition
}
}
WDT_HIT();
// manchester encode bits 31 to 0
for (i=31; i>=0; i--) {
if ((i%4)==3) fc(0,&n);
if ((lo>>i)&1) {
fc(10, &n); fc(8, &n); // low-high transition
} else {
fc(8, &n); fc(10, &n); // high-low transition
}
}
if (ledcontrol)
LED_A_ON();
SimulateTagLowFrequency(n, 0, ledcontrol);
if (ledcontrol)
LED_A_OFF();
}
// prepare a waveform pattern in the buffer based on the ID given then
// simulate a FSK tag until the button is pressed
// arg1 contains fcHigh and fcLow, arg2 contains invert and clock
void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
{
int ledcontrol=1;
int n=0, i=0;
uint8_t fcHigh = arg1 >> 8;
uint8_t fcLow = arg1 & 0xFF;
uint16_t modCnt = 0;
uint8_t clk = arg2 & 0xFF;
uint8_t invert = (arg2 >> 8) & 1;
// set LF so we don't kill the bigbuf we are setting with simulation data.
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
for (i=0; i<size; i++){
if (BitStream[i] == invert){
fcAll(fcLow, &n, clk, &modCnt);
} else {
fcAll(fcHigh, &n, clk, &modCnt);
}
}
Dbprintf("Simulating with fcHigh: %d, fcLow: %d, clk: %d, invert: %d, n: %d",fcHigh, fcLow, clk, invert, n);
/*Dbprintf("DEBUG: First 32:");
uint8_t *dest = BigBuf_get_addr();
i=0;
Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
i+=16;
Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
*/
if (ledcontrol)
LED_A_ON();
SimulateTagLowFrequency(n, 0, ledcontrol);
if (ledcontrol)
LED_A_OFF();
}
// compose ask waveform for one bit(ASK)
static void askSimBit(uint8_t c, int *n, uint8_t clock, uint8_t manchester)
{
uint8_t *dest = BigBuf_get_addr();
uint8_t halfClk = clock/2;
// c = current bit 1 or 0
if (manchester==1){
memset(dest+(*n), c, halfClk);
memset(dest+(*n) + halfClk, c^1, halfClk);
} else {
memset(dest+(*n), c, clock);
}
*n += clock;
}
static void biphaseSimBit(uint8_t c, int *n, uint8_t clock, uint8_t *phase)
{
uint8_t *dest = BigBuf_get_addr();
uint8_t halfClk = clock/2;
if (c){
memset(dest+(*n), c ^ 1 ^ *phase, halfClk);
memset(dest+(*n) + halfClk, c ^ *phase, halfClk);
} else {
memset(dest+(*n), c ^ *phase, clock);
*phase ^= 1;
}
*n += clock;
}
static void stAskSimBit(int *n, uint8_t clock) {
uint8_t *dest = BigBuf_get_addr();
uint8_t halfClk = clock/2;
//ST = .5 high .5 low 1.5 high .5 low 1 high
memset(dest+(*n), 1, halfClk);
memset(dest+(*n) + halfClk, 0, halfClk);
memset(dest+(*n) + clock, 1, clock + halfClk);
memset(dest+(*n) + clock*2 + halfClk, 0, halfClk);
memset(dest+(*n) + clock*3, 1, clock);
*n += clock*4;
}
// args clock, ask/man or askraw, invert, transmission separator
void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
{
int ledcontrol = 1;
int n=0, i=0;
uint8_t clk = (arg1 >> 8) & 0xFF;
uint8_t encoding = arg1 & 0xFF;
uint8_t separator = arg2 & 1;
uint8_t invert = (arg2 >> 8) & 1;
// set LF so we don't kill the bigbuf we are setting with simulation data.
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
if (encoding==2){ //biphase
uint8_t phase=0;
for (i=0; i<size; i++){
biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
}
if (phase==1) { //run a second set inverted to keep phase in check
for (i=0; i<size; i++){
biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
}
}
} else { // ask/manchester || ask/raw
for (i=0; i<size; i++){
askSimBit(BitStream[i]^invert, &n, clk, encoding);
}
if (encoding==0 && BitStream[0]==BitStream[size-1]){ //run a second set inverted (for ask/raw || biphase phase)
for (i=0; i<size; i++){
askSimBit(BitStream[i]^invert^1, &n, clk, encoding);
}
}
}
if (separator==1 && encoding == 1)
stAskSimBit(&n, clk);
else if (separator==1)
Dbprintf("sorry but separator option not yet available");
Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
//DEBUG
//Dbprintf("First 32:");
//uint8_t *dest = BigBuf_get_addr();
//i=0;
//Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
//i+=16;
//Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
if (ledcontrol) LED_A_ON();
SimulateTagLowFrequency(n, 0, ledcontrol);
if (ledcontrol) LED_A_OFF();
}
//carrier can be 2,4 or 8
static void pskSimBit(uint8_t waveLen, int *n, uint8_t clk, uint8_t *curPhase, bool phaseChg)
{
uint8_t *dest = BigBuf_get_addr();
uint8_t halfWave = waveLen/2;
//uint8_t idx;
int i = 0;
if (phaseChg){
// write phase change
memset(dest+(*n), *curPhase^1, halfWave);
memset(dest+(*n) + halfWave, *curPhase, halfWave);
*n += waveLen;
*curPhase ^= 1;
i += waveLen;
}
//write each normal clock wave for the clock duration
for (; i < clk; i+=waveLen){
memset(dest+(*n), *curPhase, halfWave);
memset(dest+(*n) + halfWave, *curPhase^1, halfWave);
*n += waveLen;
}
}
// args clock, carrier, invert,
void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
{
int ledcontrol=1;
int n=0, i=0;
uint8_t clk = arg1 >> 8;
uint8_t carrier = arg1 & 0xFF;
uint8_t invert = arg2 & 0xFF;
uint8_t curPhase = 0;
// set LF so we don't kill the bigbuf we are setting with simulation data.
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
for (i=0; i<size; i++){
if (BitStream[i] == curPhase){
pskSimBit(carrier, &n, clk, &curPhase, FALSE);
} else {
pskSimBit(carrier, &n, clk, &curPhase, TRUE);
}
}
Dbprintf("Simulating with Carrier: %d, clk: %d, invert: %d, n: %d",carrier, clk, invert, n);
//Dbprintf("DEBUG: First 32:");
//uint8_t *dest = BigBuf_get_addr();
//i=0;
//Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
//i+=16;
//Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
if (ledcontrol) LED_A_ON();
SimulateTagLowFrequency(n, 0, ledcontrol);
if (ledcontrol) LED_A_OFF();
}
// loop to get raw HID waveform then FSK demodulate the TAG ID from it
void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
{
uint8_t *dest = BigBuf_get_addr();
//const size_t sizeOfBigBuff = BigBuf_max_traceLen();
size_t size;
uint32_t hi2=0, hi=0, lo=0;
int idx=0;
int dummyIdx = 0;
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
//clear read buffer
BigBuf_Clear_keep_EM();
while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
WDT_HIT();
if (ledcontrol) LED_A_ON();
DoAcquisition_default(-1,true);
// FSK demodulator
//size = sizeOfBigBuff; //variable size will change after demod so re initialize it before use
size = 50*128*2; //big enough to catch 2 sequences of largest format
idx = HIDdemodFSK(dest, &size, &hi2, &hi, &lo, &dummyIdx);
if (idx>0 && lo>0 && (size==96 || size==192)){
// go over previously decoded manchester data and decode into usable tag ID
if (hi2 != 0){ //extra large HID tags 88/192 bits
Dbprintf("TAG ID: %x%08x%08x (%d)",
(unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
}else { //standard HID tags 44/96 bits
//Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
uint8_t bitlen = 0;
uint32_t fc = 0;
uint32_t cardnum = 0;
if (((hi>>5)&1) == 1){//if bit 38 is set then < 37 bit format is used
uint32_t lo2=0;
lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
uint8_t idx3 = 1;
while(lo2 > 1){ //find last bit set to 1 (format len bit)
lo2=lo2 >> 1;
idx3++;
}
bitlen = idx3+19;
fc =0;
cardnum=0;
if(bitlen == 26){
cardnum = (lo>>1)&0xFFFF;
fc = (lo>>17)&0xFF;
}
if(bitlen == 37){
cardnum = (lo>>1)&0x7FFFF;
fc = ((hi&0xF)<<12)|(lo>>20);
}
if(bitlen == 34){
cardnum = (lo>>1)&0xFFFF;
fc= ((hi&1)<<15)|(lo>>17);
}
if(bitlen == 35){
cardnum = (lo>>1)&0xFFFFF;
fc = ((hi&1)<<11)|(lo>>21);
}
}
else { //if bit 38 is not set then 37 bit format is used
bitlen= 37;
fc =0;
cardnum=0;
if(bitlen==37){
cardnum = (lo>>1)&0x7FFFF;
fc = ((hi&0xF)<<12)|(lo>>20);
}
}
//Dbprintf("TAG ID: %x%08x (%d)",
// (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
Dbprintf("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
(unsigned int) bitlen, (unsigned int) fc, (unsigned int) cardnum);
}
if (findone){
if (ledcontrol) LED_A_OFF();
*high = hi;
*low = lo;
break;
}
// reset
}
hi2 = hi = lo = idx = 0;
WDT_HIT();
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
DbpString("Stopped");
if (ledcontrol) LED_A_OFF();
}
// loop to get raw HID waveform then FSK demodulate the TAG ID from it
void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
{
uint8_t *dest = BigBuf_get_addr();
size_t size;
int idx=0, dummyIdx=0;
//clear read buffer
BigBuf_Clear_keep_EM();
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
WDT_HIT();
if (ledcontrol) LED_A_ON();
DoAcquisition_default(-1,true);
// FSK demodulator
size = 50*128*2; //big enough to catch 2 sequences of largest format
idx = AWIDdemodFSK(dest, &size, &dummyIdx);
if (idx<=0 || size!=96) continue;
// Index map
// 0 10 20 30 40 50 60
// | | | | | | |
// 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
// -----------------------------------------------------------------------------
// 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
// premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
// |---26 bit---| |-----117----||-------------142-------------|
// b = format bit len, o = odd parity of last 3 bits
// f = facility code, c = card number
// w = wiegand parity
// (26 bit format shown)
//get raw ID before removing parities
uint32_t rawLo = bytebits_to_byte(dest+idx+64,32);
uint32_t rawHi = bytebits_to_byte(dest+idx+32,32);
uint32_t rawHi2 = bytebits_to_byte(dest+idx,32);
size = removeParity(dest, idx+8, 4, 1, 88);
if (size != 66) continue;
// ok valid card found!
// Index map
// 0 10 20 30 40 50 60
// | | | | | | |
// 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
// -----------------------------------------------------------------------------
// 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
// bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
// |26 bit| |-117--| |-----142------|
// b = format bit len, o = odd parity of last 3 bits
// f = facility code, c = card number
// w = wiegand parity
// (26 bit format shown)
uint32_t fc = 0;
uint32_t cardnum = 0;
uint32_t code1 = 0;
uint32_t code2 = 0;
uint8_t fmtLen = bytebits_to_byte(dest,8);
if (fmtLen==26){
fc = bytebits_to_byte(dest+9, 8);
cardnum = bytebits_to_byte(dest+17, 16);
code1 = bytebits_to_byte(dest+8,fmtLen);
Dbprintf("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
} else {
cardnum = bytebits_to_byte(dest+8+(fmtLen-17), 16);
if (fmtLen>32){
code1 = bytebits_to_byte(dest+8,fmtLen-32);
code2 = bytebits_to_byte(dest+8+(fmtLen-32),32);
Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
} else{
code1 = bytebits_to_byte(dest+8,fmtLen);
Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
}
}
if (findone){
if (ledcontrol) LED_A_OFF();
break;
}
// reset
idx = 0;
WDT_HIT();
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
DbpString("Stopped");
if (ledcontrol) LED_A_OFF();
}
void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
{
uint8_t *dest = BigBuf_get_addr();
size_t size=0, idx=0;
int clk=0, invert=0, errCnt=0, maxErr=20;
uint32_t hi=0;
uint64_t lo=0;
//clear read buffer
BigBuf_Clear_keep_EM();
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
WDT_HIT();
if (ledcontrol) LED_A_ON();
DoAcquisition_default(-1,true);
size = BigBuf_max_traceLen();
//askdemod and manchester decode
if (size > 16385) size = 16385; //big enough to catch 2 sequences of largest format
errCnt = askdemod(dest, &size, &clk, &invert, maxErr, 0, 1);
WDT_HIT();
if (errCnt<0) continue;
errCnt = Em410xDecode(dest, &size, &idx, &hi, &lo);
if (errCnt){
if (size>64){
Dbprintf("EM XL TAG ID: %06x%08x%08x - (%05d_%03d_%08d)",
hi,
(uint32_t)(lo>>32),
(uint32_t)lo,
(uint32_t)(lo&0xFFFF),
(uint32_t)((lo>>16LL) & 0xFF),
(uint32_t)(lo & 0xFFFFFF));
} else {
Dbprintf("EM TAG ID: %02x%08x - (%05d_%03d_%08d)",
(uint32_t)(lo>>32),
(uint32_t)lo,
(uint32_t)(lo&0xFFFF),
(uint32_t)((lo>>16LL) & 0xFF),
(uint32_t)(lo & 0xFFFFFF));
}
if (findone){
if (ledcontrol) LED_A_OFF();
*high=lo>>32;
*low=lo & 0xFFFFFFFF;
break;
}
}
WDT_HIT();
hi = lo = size = idx = 0;
clk = invert = errCnt = 0;
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
DbpString("Stopped");
if (ledcontrol) LED_A_OFF();
}
void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
{
uint8_t *dest = BigBuf_get_addr();
int idx=0;
uint32_t code=0, code2=0;
uint8_t version=0;
uint8_t facilitycode=0;
uint16_t number=0;
int dummyIdx=0;
//clear read buffer
BigBuf_Clear_keep_EM();
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
WDT_HIT();
if (ledcontrol) LED_A_ON();
DoAcquisition_default(-1,true);
//fskdemod and get start index
WDT_HIT();
idx = IOdemodFSK(dest, BigBuf_max_traceLen(), &dummyIdx);
if (idx<0) continue;
//valid tag found
//Index map
//0 10 20 30 40 50 60
//| | | | | | |
//01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
//-----------------------------------------------------------------------------
//00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
//
//XSF(version)facility:codeone+codetwo
//Handle the data
if(findone){ //only print binary if we are doing one
Dbprintf("%d%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],dest[idx+8]);
Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]);
Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]);
Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]);
Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]);
Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]);
Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
}
code = bytebits_to_byte(dest+idx,32);
code2 = bytebits_to_byte(dest+idx+32,32);
version = bytebits_to_byte(dest+idx+27,8); //14,4
facilitycode = bytebits_to_byte(dest+idx+18,8);
number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9
Dbprintf("XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
// if we're only looking for one tag
if (findone){
if (ledcontrol) LED_A_OFF();
//LED_A_OFF();
*high=code;
*low=code2;
break;
}
code=code2=0;
version=facilitycode=0;
number=0;
idx=0;
WDT_HIT();
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
DbpString("Stopped");
if (ledcontrol) LED_A_OFF();
}
/*------------------------------
* T5555/T5557/T5567/T5577 routines
*------------------------------
* NOTE: T55x7/T5555 configuration register definitions moved to protocols.h
*
* Relevant communication times in microsecond
* To compensate antenna falling times shorten the write times
* and enlarge the gap ones.
* Q5 tags seems to have issues when these values changes.
*/
#define START_GAP 31*8 // was 250 // SPEC: 1*8 to 50*8 - typ 15*8 (or 15fc)
#define WRITE_GAP 20*8 // was 160 // SPEC: 1*8 to 20*8 - typ 10*8 (or 10fc)
#define WRITE_0 18*8 // was 144 // SPEC: 16*8 to 32*8 - typ 24*8 (or 24fc)
#define WRITE_1 50*8 // was 400 // SPEC: 48*8 to 64*8 - typ 56*8 (or 56fc) 432 for T55x7; 448 for E5550
#define READ_GAP 15*8
void TurnReadLFOn(int delay) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Give it a bit of time for the resonant antenna to settle.
WaitUS(delay); //155*8 //50*8
}
// Write one bit to card
void T55xxWriteBit(int bit) {
if (!bit)
TurnReadLFOn(WRITE_0);
else
TurnReadLFOn(WRITE_1);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
WaitUS(WRITE_GAP);
}
// 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(START_GAP);
// reset tag - op code 00
T55xxWriteBit(0);
T55xxWriteBit(0);
TurnReadLFOn(READ_GAP);
// 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
void T55xxWriteBlockExt(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
LED_A_ON();
bool PwdMode = arg & 0x1;
uint8_t Page = (arg & 0x2)>>1;
bool testMode = arg & 0x4;
uint32_t i = 0;
// 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(START_GAP);
if (testMode) Dbprintf("TestMODE");
// Std Opcode 10
T55xxWriteBit(testMode ? 0 : 1);
T55xxWriteBit(testMode ? 1 : Page); //Page 0
if (PwdMode) {
// Send Pwd
for (i = 0x80000000; i != 0; i >>= 1)
T55xxWriteBit(Pwd & i);
}
// Send Lock bit
T55xxWriteBit(0);
// Send Data
for (i = 0x80000000; i != 0; i >>= 1)
T55xxWriteBit(Data & i);
// Send Block number
for (i = 0x04; i != 0; i >>= 1)
T55xxWriteBit(Block & i);
// Perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
// so wait a little more)
// "there is a clock delay before programming"
// - programming takes ~5.6ms for t5577 ~18ms for E5550 or t5567
// so we should wait 1 clock + 5.6ms then read response?
// but we need to know we are dealing with t5577 vs t5567 vs e5550 (or q5) marshmellow...
if (testMode) {
//TESTMODE TIMING TESTS:
// <566us does nothing
// 566-568 switches between wiping to 0s and doing nothing
// 5184 wipes and allows 1 block to be programmed.
// indefinite power on wipes and then programs all blocks with bitshifted data sent.
TurnReadLFOn(5184);
} else {
TurnReadLFOn(20 * 1000);
//could attempt to do a read to confirm write took
// as the tag should repeat back the new block
// until it is reset, but to confirm it we would
// need to know the current block 0 config mode for
// modulation clock an other details to demod the response...
// response should be (for t55x7) a 0 bit then (ST if on)
// block data written in on repeat until reset.
//DoPartialAcquisition(20, true, 12000);
}
// turn field off
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_A_OFF();
}
// Write one card block in page 0, no lock
void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
T55xxWriteBlockExt(Data, Block, Pwd, arg);
cmd_send(CMD_ACK,0,0,0,0,0);
}
// Read one card block in page [page]
void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
LED_A_ON();
bool PwdMode = arg0 & 0x1;
uint8_t Page = (arg0 & 0x2) >> 1;
uint32_t i = 0;
bool RegReadMode = (Block == 0xFF);//regular read mode
//clear buffer now so it does not interfere with timing later
BigBuf_Clear_ext(false);
//make sure block is at max 7
Block &= 0x7;
// 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...
TurnReadLFOn(210*8);
// Acquisition
// Now do the acquisition
DoPartialAcquisition(0, true, 12000, 0);
// Turn the field off
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
cmd_send(CMD_ACK,0,0,0,0,0);
LED_A_OFF();
}
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(START_GAP);
// Opcode 10
T55xxWriteBit(1);
T55xxWriteBit(0); //Page 0
// Send Pwd
for (i = 0x80000000; i != 0; i >>= 1)
T55xxWriteBit(Pwd & i);
// Turn and leave field on to let the begin repeating transmission
TurnReadLFOn(20*1000);
}
/*-------------- Cloning routines -----------*/
void WriteT55xx(uint32_t *blockdata, uint8_t startblock, uint8_t numblocks) {
// write last block first and config block last (if included)
for (uint8_t i = numblocks+startblock; i > startblock; i--) {
T55xxWriteBlockExt(blockdata[i-1],i-1,0,0);
}
}
// Copy HID id to card and setup block 0 config
void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
uint32_t data[] = {0,0,0,0,0,0,0};
uint8_t last_block = 0;
if (longFMT) {
// Ensure no more than 84 bits supplied
if (hi2>0xFFFFF) {
DbpString("Tags can only have 84 bits.");
return;
}
// Build the 6 data blocks for supplied 84bit ID
last_block = 6;
// load preamble (1D) & long format identifier (9E manchester encoded)
data[1] = 0x1D96A900 | (manchesterEncode2Bytes((hi2 >> 16) & 0xF) & 0xFF);
// load raw id from hi2, hi, lo to data blocks (manchester encoded)
data[2] = manchesterEncode2Bytes(hi2 & 0xFFFF);
data[3] = manchesterEncode2Bytes(hi >> 16);
data[4] = manchesterEncode2Bytes(hi & 0xFFFF);
data[5] = manchesterEncode2Bytes(lo >> 16);
data[6] = manchesterEncode2Bytes(lo & 0xFFFF);
} else {
// Ensure no more than 44 bits supplied
if (hi>0xFFF) {
DbpString("Tags can only have 44 bits.");
return;
}
// Build the 3 data blocks for supplied 44bit ID
last_block = 3;
// load preamble
data[1] = 0x1D000000 | (manchesterEncode2Bytes(hi) & 0xFFFFFF);
data[2] = manchesterEncode2Bytes(lo >> 16);
data[3] = manchesterEncode2Bytes(lo & 0xFFFF);
}
// load chip config block
data[0] = T55x7_BITRATE_RF_50 | T55x7_MODULATION_FSK2a | last_block << T55x7_MAXBLOCK_SHIFT;
//TODO add selection of chip for Q5 or T55x7
// data[0] = (((50-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | last_block << T5555_MAXBLOCK_SHIFT;
LED_D_ON();
// Program the data blocks for supplied ID
// and the block 0 for HID format
WriteT55xx(data, 0, last_block+1);
LED_D_OFF();
DbpString("DONE!");
}
void CopyIOtoT55x7(uint32_t hi, uint32_t lo) {
uint32_t data[] = {T55x7_BITRATE_RF_64 | T55x7_MODULATION_FSK2a | (2 << T55x7_MAXBLOCK_SHIFT), hi, lo};
//TODO add selection of chip for Q5 or T55x7
// data[0] = (((64-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 2 << T5555_MAXBLOCK_SHIFT;
LED_D_ON();
// Program the data blocks for supplied ID
// and the block 0 config
WriteT55xx(data, 0, 3);
LED_D_OFF();
DbpString("DONE!");
}
// Clone Indala 64-bit tag by UID to T55x7
void CopyIndala64toT55x7(uint32_t hi, uint32_t lo) {
//Program the 2 data blocks for supplied 64bit UID
// and the Config for Indala 64 format (RF/32;PSK1 with RF/2;Maxblock=2)
uint32_t data[] = { T55x7_BITRATE_RF_32 | T55x7_MODULATION_PSK1 | (2 << T55x7_MAXBLOCK_SHIFT), hi, lo};
//TODO add selection of chip for Q5 or T55x7
// data[0] = (((32-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_PSK1 | 2 << T5555_MAXBLOCK_SHIFT;
WriteT55xx(data, 0, 3);
//Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=2;Inverse data)
// T5567WriteBlock(0x603E1042,0);
DbpString("DONE!");
}
// Clone Indala 224-bit tag by UID to T55x7
void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t uid4, uint32_t uid5, uint32_t uid6, uint32_t uid7) {
//Program the 7 data blocks for supplied 224bit UID
uint32_t data[] = {0, uid1, uid2, uid3, uid4, uid5, uid6, uid7};
// and the block 0 for Indala224 format
//Config for Indala (RF/32;PSK2 with RF/2;Maxblock=7)
data[0] = T55x7_BITRATE_RF_32 | T55x7_MODULATION_PSK2 | (7 << T55x7_MAXBLOCK_SHIFT);
//TODO add selection of chip for Q5 or T55x7
// data[0] = (((32-2)>>1)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_PSK2 | 7 << T5555_MAXBLOCK_SHIFT;
WriteT55xx(data, 0, 8);
//Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=7;Inverse data)
// T5567WriteBlock(0x603E10E2,0);
DbpString("DONE!");
}
// clone viking tag to T55xx
void CopyVikingtoT55xx(uint32_t block1, uint32_t block2, uint8_t Q5) {
uint32_t data[] = {T55x7_BITRATE_RF_32 | T55x7_MODULATION_MANCHESTER | (2 << T55x7_MAXBLOCK_SHIFT), block1, block2};
if (Q5) data[0] = T5555_SET_BITRATE(32) | T5555_MODULATION_MANCHESTER | 2 << T5555_MAXBLOCK_SHIFT;
// Program the data blocks for supplied ID and the block 0 config
WriteT55xx(data, 0, 3);
LED_D_OFF();
cmd_send(CMD_ACK,0,0,0,0,0);
}
// Define 9bit header for EM410x tags
#define EM410X_HEADER 0x1FF
#define EM410X_ID_LENGTH 40
void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {
int i, id_bit;
uint64_t id = EM410X_HEADER;
uint64_t rev_id = 0; // reversed ID
int c_parity[4]; // column parity
int r_parity = 0; // row parity
uint32_t clock = 0;
// Reverse ID bits given as parameter (for simpler operations)
for (i = 0; i < EM410X_ID_LENGTH; ++i) {
if (i < 32) {
rev_id = (rev_id << 1) | (id_lo & 1);
id_lo >>= 1;
} else {
rev_id = (rev_id << 1) | (id_hi & 1);
id_hi >>= 1;
}
}
for (i = 0; i < EM410X_ID_LENGTH; ++i) {
id_bit = rev_id & 1;
if (i % 4 == 0) {
// Don't write row parity bit at start of parsing
if (i)
id = (id << 1) | r_parity;
// Start counting parity for new row
r_parity = id_bit;
} else {
// Count row parity
r_parity ^= id_bit;
}
// First elements in column?
if (i < 4)
// Fill out first elements
c_parity[i] = id_bit;
else
// Count column parity
c_parity[i % 4] ^= id_bit;
// Insert ID bit
id = (id << 1) | id_bit;
rev_id >>= 1;
}
// Insert parity bit of last row
id = (id << 1) | r_parity;
// Fill out column parity at the end of tag
for (i = 0; i < 4; ++i)
id = (id << 1) | c_parity[i];
// Add stop bit
id <<= 1;
Dbprintf("Started writing %s tag ...", card ? "T55x7":"T5555");
LED_D_ON();
// Write EM410x ID
uint32_t data[] = {0, (uint32_t)(id>>32), (uint32_t)(id & 0xFFFFFFFF)};
clock = (card & 0xFF00) >> 8;
clock = (clock == 0) ? 64 : clock;
Dbprintf("Clock rate: %d", clock);
if (card & 0xFF) { //t55x7
clock = GetT55xxClockBit(clock);
if (clock == 0) {
Dbprintf("Invalid clock rate: %d", clock);
return;
}
data[0] = clock | T55x7_MODULATION_MANCHESTER | (2 << T55x7_MAXBLOCK_SHIFT);
} else { //t5555 (Q5)
data[0] = T5555_SET_BITRATE(clock) | T5555_MODULATION_MANCHESTER | (2 << T5555_MAXBLOCK_SHIFT);
}
WriteT55xx(data, 0, 3);
LED_D_OFF();
Dbprintf("Tag %s written with 0x%08x%08x\n", card ? "T55x7":"T5555",
(uint32_t)(id >> 32), (uint32_t)id);
}
//-----------------------------------
// EM4469 / EM4305 routines
//-----------------------------------
#define FWD_CMD_LOGIN 0xC //including the even parity, binary mirrored
#define FWD_CMD_WRITE 0xA
#define FWD_CMD_READ 0x9
#define FWD_CMD_DISABLE 0x5
uint8_t forwardLink_data[64]; //array of forwarded bits
uint8_t * forward_ptr; //ptr for forward message preparation
uint8_t fwd_bit_sz; //forwardlink bit counter
uint8_t * fwd_write_ptr; //forwardlink bit pointer
//====================================================================
// prepares command bits
// see EM4469 spec
//====================================================================
//--------------------------------------------------------------------
// VALUES TAKEN FROM EM4x function: SendForward
// START_GAP = 440; (55*8) cycles at 125Khz (8us = 1cycle)
// WRITE_GAP = 128; (16*8)
// WRITE_1 = 256 32*8; (32*8)
// These timings work for 4469/4269/4305 (with the 55*8 above)
// WRITE_0 = 23*8 , 9*8 SpinDelayUs(23*8);
uint8_t Prepare_Cmd( uint8_t cmd ) {
*forward_ptr++ = 0; //start bit
*forward_ptr++ = 0; //second pause for 4050 code
*forward_ptr++ = cmd;
cmd >>= 1;
*forward_ptr++ = cmd;
cmd >>= 1;
*forward_ptr++ = cmd;
cmd >>= 1;
*forward_ptr++ = cmd;
return 6; //return number of emited bits
}
//====================================================================
// prepares address bits
// see EM4469 spec
//====================================================================
uint8_t Prepare_Addr( uint8_t addr ) {
register uint8_t line_parity;
uint8_t i;
line_parity = 0;
for(i=0;i<6;i++) {
*forward_ptr++ = addr;
line_parity ^= addr;
addr >>= 1;
}
*forward_ptr++ = (line_parity & 1);
return 7; //return number of emited bits
}
//====================================================================
// prepares data bits intreleaved with parity bits
// see EM4469 spec
//====================================================================
uint8_t Prepare_Data( uint16_t data_low, uint16_t data_hi) {
register uint8_t line_parity;
register uint8_t column_parity;
register uint8_t i, j;
register uint16_t data;
data = data_low;
column_parity = 0;
for(i=0; i<4; i++) {
line_parity = 0;
for(j=0; j<8; j++) {
line_parity ^= data;
column_parity ^= (data & 1) << j;
*forward_ptr++ = data;
data >>= 1;
}
*forward_ptr++ = line_parity;
if(i == 1)
data = data_hi;
}
for(j=0; j<8; j++) {
*forward_ptr++ = column_parity;
column_parity >>= 1;
}
*forward_ptr = 0;
return 45; //return number of emited bits
}
//====================================================================
// Forward Link send function
// Requires: forwarLink_data filled with valid bits (1 bit per byte)
// fwd_bit_count set with number of bits to be sent
//====================================================================
void SendForward(uint8_t fwd_bit_count) {
fwd_write_ptr = forwardLink_data;
fwd_bit_sz = fwd_bit_count;
// Set up FPGA, 125kHz or 95 divisor
LFSetupFPGAForADC(95, true);
// force 1st mod pulse (start gap must be longer for 4305)
fwd_bit_sz--; //prepare next bit modulation
fwd_write_ptr++;
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
WaitUS(55*8); //55 cycles off (8us each)for 4305 //another reader has 37 here...
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
WaitUS(18*8); //18 cycles on (8us each)
// now start writting
while(fwd_bit_sz-- > 0) { //prepare next bit modulation
if(((*fwd_write_ptr++) & 1) == 1)
WaitUS(32*8); //32 cycles at 125Khz (8us each)
else {
//These timings work for 4469/4269/4305 (with the 55*8 above)
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
WaitUS(23*8); //23 cycles off (8us each)
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
WaitUS(18*8); //18 cycles on (8us each)
}
}
}
void EM4xLogin(uint32_t Password) {
uint8_t fwd_bit_count;
forward_ptr = forwardLink_data;
fwd_bit_count = Prepare_Cmd( FWD_CMD_LOGIN );
fwd_bit_count += Prepare_Data( Password&0xFFFF, Password>>16 );
SendForward(fwd_bit_count);
//Wait for command to complete
SpinDelay(20);
}
void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
uint8_t fwd_bit_count;
// Clear destination buffer before sending the command
BigBuf_Clear_ext(false);
LED_A_ON();
StartTicks();
//If password mode do login
if (PwdMode == 1) EM4xLogin(Pwd);
forward_ptr = forwardLink_data;
fwd_bit_count = Prepare_Cmd( FWD_CMD_READ );
fwd_bit_count += Prepare_Addr( Address );
SendForward(fwd_bit_count);
WaitUS(400);
// Now do the acquisition
DoPartialAcquisition(20, true, 6000, 1000);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
LED_A_OFF();
cmd_send(CMD_ACK,0,0,0,0,0);
}
void EM4xWriteWord(uint32_t flag, uint32_t Data, uint32_t Pwd) {
bool PwdMode = (flag & 0xF);
uint8_t Address = (flag >> 8) & 0xFF;
uint8_t fwd_bit_count;
//clear buffer now so it does not interfere with timing later
BigBuf_Clear_ext(false);
LED_A_ON();
StartTicks();
//If password mode do login
if (PwdMode) EM4xLogin(Pwd);
forward_ptr = forwardLink_data;
fwd_bit_count = Prepare_Cmd( FWD_CMD_WRITE );
fwd_bit_count += Prepare_Addr( Address );
fwd_bit_count += Prepare_Data( Data&0xFFFF, Data>>16 );
SendForward(fwd_bit_count);
//Wait for write to complete
//SpinDelay(10);
WaitUS(6500);
//Capture response if one exists
DoPartialAcquisition(20, true, 6000, 1000);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
LED_A_OFF();
cmd_send(CMD_ACK,0,0,0,0,0);
}
/*
Reading a COTAG.
COTAG needs the reader to send a startsequence and the card has an extreme slow datarate.
because of this, we can "sample" the data signal but we interpreate it to Manchester direct.
READER START SEQUENCE:
burst 800 us, gap 2.2 msecs
burst 3.6 msecs gap 2.2 msecs
burst 800 us gap 2.2 msecs
pulse 3.6 msecs
This triggers a COTAG tag to response
*/
void Cotag(uint32_t arg0) {
#define OFF { FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); WaitUS(2035); }
#define ON(x) { FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); WaitUS((x)); }
uint8_t rawsignal = arg0 & 0xF;
LED_A_ON();
// Switching to LF image on FPGA. This might empty BigBuff
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
//clear buffer now so it does not interfere with timing later
BigBuf_Clear_ext(false);
// Set up FPGA, 132kHz to power up the tag
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 89);
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);
// Now set up the SSC to get the ADC samples that are now streaming at us.
FpgaSetupSsc();
// start clock - 1.5ticks is 1us
StartTicks();
//send COTAG start pulse
ON(740) OFF
ON(3330) OFF
ON(740) OFF
ON(1000)
switch(rawsignal) {
case 0: doCotagAcquisition(50000); break;
case 1: doCotagAcquisitionManchester(); break;
case 2: DoAcquisition_config(true, 0); break;
}
// Turn the field off
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
cmd_send(CMD_ACK,0,0,0,0,0);
LED_A_OFF();
}
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