// Also routines for raw mode reading/simulating of LF waveform
//-----------------------------------------------------------------------------
+#include <stdlib.h>
#include "proxmark3.h"
#include "apps.h"
#include "util.h"
#include "string.h"
#include "lfdemod.h"
+typedef struct {
+ uint8_t * buffer;
+ uint32_t numbits;
+ uint8_t position;
+} BitstreamOut;
+/**
+ * @brief Pushes bit onto the stream
+ * @param stream
+ * @param bit
+ */
+void pushBit( BitstreamOut* stream, bool bit)
+{
+ int bytepos = stream->position >> 3; // divide by 8
+ int bitpos = stream->position & 7;
+ *(stream->buffer+bytepos) |= (bit & 1) << (7 - bitpos);
+ stream->position++;
+ stream->numbits++;
+}
+void DoAcquisition(int decimation, int quantization, int trigger_threshold, bool averaging)
+{
+ //A decimation of 2 means we keep every 2nd sample
+ //A decimation of 3 means we keep 1 in 3 samples.
+ //A quantization of 1 means one bit is discarded from the sample (division by 2).
+ uint8_t *dest = (uint8_t *)BigBuf;
+ int bufsize = BIGBUF_SIZE;
+ memset(dest, 0, bufsize);
+ // You can't decimate 8 bits more than 7 times
+ if(quantization > 7) quantization = 7;
+ // Use a bit stream to handle the output
+ BitstreamOut data = { dest , 0, 0};
+ int sample_counter = 0;
+ uint8_t sample = 0;
+ //If we want to do averaging
+ uint32_t sample_sum =0 ;
+ uint32_t sample_total_numbers =0 ;
+ uint32_t sample_total_saved =0 ;
+
+ for(;;) {
+ WDT_HIT();
+ if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
+ AT91C_BASE_SSC->SSC_THR = 0x43;
+ LED_D_ON();
+ }
+ if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
+ sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+ sample_total_numbers++;
+ if (trigger_threshold != -1 && sample < trigger_threshold)
+ continue;
+
+ LED_D_OFF();
+ trigger_threshold = -1;
+ sample_counter++;
+ sample_sum += sample;
+ //Check decimation
+ if(sample_counter < decimation) continue;
+ //Averaging
+ if(averaging) sample = sample_sum / decimation;
+
+ sample_counter = 0;
+ sample_sum =0;
+ sample_total_saved ++;
+ pushBit(&data, sample & 0x80);
+ if(quantization < 7) pushBit(&data, sample & 0x40);
+ if(quantization < 6) pushBit(&data, sample & 0x20);
+ if(quantization < 5) pushBit(&data, sample & 0x10);
+ if(quantization < 4) pushBit(&data, sample & 0x08);
+ if(quantization < 3) pushBit(&data, sample & 0x04);
+ if(quantization < 2) pushBit(&data, sample & 0x02);
+ if(quantization < 1) pushBit(&data, sample & 0x01);
+
+ if(data.numbits +1 >= bufsize) break;
+ }
+ }
+ Dbprintf("Done, saved %l out of %l seen samples.",sample_total_saved, sample_total_numbers);
+
+}
+
/**
-* Does the sample acquisition. If threshold is specified, the actual sampling
-* is not commenced until the threshold has been reached.
+* Does the sample acquisition. If threshold is specified, the actual sampling
+* is not commenced until the threshold has been reached.
* @param trigger_threshold - the threshold
* @param silent - is true, now outputs are made. If false, dbprints the status
*/
}
}
/**
-* Perform sample aquisition.
+* Perform sample aquisition.
*/
void DoAcquisition125k(int trigger_threshold)
{
}
/**
-* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
-* if not already loaded, sets divisor and starts up the antenna.
+* Setup the FPGA to listen for samples. This method downloads the FPGA bitstream
+* if not already loaded, sets divisor and starts up the antenna.
* @param divisor : 1, 88> 255 or negative ==> 134.8 KHz
* 0 or 95 ==> 125 KHz
-*
+*
**/
void LFSetupFPGAForADC(int divisor, bool lf_field)
{
FpgaSetupSsc();
}
/**
-* Initializes the FPGA, and acquires the samples.
+* Initializes the FPGA, and acquires the samples.
**/
void AcquireRawAdcSamples125k(int divisor)
{
DoAcquisition125k_internal(-1,false);
}
/**
-* Initializes the FPGA for snoop-mode, and acquires the samples.
+* Initializes the FPGA for snoop-mode, and acquires the samples.
**/
void SnoopLFRawAdcSamples(int divisor, int trigger_threshold)
// 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
+ #define FSAMPLE 2000000
+ #define FREQLO 123200
+ #define FREQHI 134200
signed char *dest = (signed char *)BigBuf;
int n = sizeof(BigBuf);
- // int *dest = GraphBuffer;
- // int n = GraphTraceLen;
-
// 128 bit shift register [shift3:shift2:shift1:shift0]
uint32_t shift3 = 0, shift2 = 0, shift1 = 0, shift0 = 0;
shift2 = ((shift2>>24) | (shift3 << 8)) & 0x0ffff;
// if r/w tag, check ident match
- if ( shift3&(1<<15) ) {
+ 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 ) {
+ if (((shift3 >> 16) ^ shift0) & 0x7fff ) {
DbpString("Error: Ident mismatch!");
} else {
DbpString("Info: TI tag ident is valid");
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
+ #define TIBUFLEN 1250
// clear buffer
memset(BigBuf,0,sizeof(BigBuf));
{
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;
-
+
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(;;) {
while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
}
WDT_HIT();
}
-
+
if (ledcontrol)
LED_D_ON();
-
+
if(tab[i])
OPEN_COIL();
else
SHORT_COIL();
-
+
if (ledcontrol)
LED_D_OFF();
-
+
while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
if(BUTTON_PRESS()) {
DbpString("Stopped");
}
WDT_HIT();
}
-
+
i++;
if(i == period) {
i = 0;
if (ledcontrol) LED_A_ON();
DoAcquisition125k_internal(-1,true);
- size = sizeof(BigBuf);
- if (size < 2000) continue;
// FSK demodulator
-
- int bitLen = HIDdemodFSK(dest,size,&hi2,&hi,&lo);
+ size = HIDdemodFSK(dest, sizeof(BigBuf), &hi2, &hi, &lo);
WDT_HIT();
- if (bitLen>0 && lo>0){
+ if (size>0 && lo>0){
// final loop, go over previously decoded manchester data and decode into usable tag ID
// 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0
if (hi2 != 0){ //extra large HID tags
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
+ 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;
+ while(lo2 > 1){ //find last bit set to 1 (format len bit)
+ lo2=lo2 >> 1;
idx3++;
}
- bitlen =idx3+19;
+ bitlen = idx3+19;
fc =0;
cardnum=0;
- if(bitlen==26){
+ if(bitlen == 26){
cardnum = (lo>>1)&0xFFFF;
fc = (lo>>17)&0xFF;
}
- if(bitlen==37){
+ if(bitlen == 37){
cardnum = (lo>>1)&0x7FFFF;
fc = ((hi&0xF)<<12)|(lo>>20);
}
- if(bitlen==34){
+ if(bitlen == 34){
cardnum = (lo>>1)&0xFFFF;
fc= ((hi&1)<<15)|(lo>>17);
}
- if(bitlen==35){
+ if(bitlen == 35){
cardnum = (lo>>1)&0xFFFFF;
fc = ((hi&1)<<11)|(lo>>21);
}
hi2 = hi = lo = 0;
}
WDT_HIT();
- //SpinDelay(50);
}
DbpString("Stopped");
if (ledcontrol) LED_A_OFF();
{
uint8_t *dest = (uint8_t *)BigBuf;
- size_t size=0; //, found=0;
- uint32_t bitLen=0;
+ size_t size=0;
int clk=0, invert=0, errCnt=0;
uint64_t lo=0;
// Configure to go in 125Khz listen mode
DoAcquisition125k_internal(-1,true);
size = sizeof(BigBuf);
- if (size < 2000) continue;
- // FSK demodulator
- //int askmandemod(uint8_t *BinStream,uint32_t *BitLen,int *clk, int *invert);
- bitLen=size;
//Dbprintf("DEBUG: Buffer got");
- errCnt = askmandemod(dest,&bitLen,&clk,&invert); //HIDdemodFSK(dest,size,&hi2,&hi,&lo);
+ //askdemod and manchester decode
+ errCnt = askmandemod(dest, &size, &clk, &invert);
//Dbprintf("DEBUG: ASK Got");
WDT_HIT();
if (errCnt>=0){
- lo = Em410xDecode(dest,bitLen);
+ lo = Em410xDecode(dest,size);
//Dbprintf("DEBUG: EM GOT");
- //printEM410x(lo);
if (lo>0){
- 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));
+ 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();
invert=0;
errCnt=0;
size=0;
- //SpinDelay(50);
}
DbpString("Stopped");
if (ledcontrol) LED_A_OFF();
data1 = hi; // load preamble
data2 = lo;
-
+
LED_D_ON();
// Program the data blocks for supplied ID
// and the block 0 for HID format
DbpString("DONE!");
-}
+}
void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int uid6, int uid7)
{
projects / proxmark3-svn / blobdiff