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[proxmark3-svn] / armsrc / appmain.c
1 //-----------------------------------------------------------------------------
2 // The main application code. This is the first thing called after start.c
3 // executes.
4 // Jonathan Westhues, Mar 2006
5 // Edits by Gerhard de Koning Gans, Sep 2007 (##)
6 //-----------------------------------------------------------------------------
7
8
9 #include <proxmark3.h>
10 #include <stdlib.h>
11 #include "apps.h"
12 #ifdef WITH_LCD
13 #include "fonts.h"
14 #include "LCD.h"
15 #endif
16
17 // The large multi-purpose buffer, typically used to hold A/D samples,
18 // maybe pre-processed in some way.
19 DWORD BigBuf[16000];
20
21 //=============================================================================
22 // A buffer where we can queue things up to be sent through the FPGA, for
23 // any purpose (fake tag, as reader, whatever). We go MSB first, since that
24 // is the order in which they go out on the wire.
25 //=============================================================================
26
27 BYTE ToSend[256];
28 int ToSendMax;
29 static int ToSendBit;
30
31
32 void BufferClear(void)
33 {
34 memset(BigBuf,0,sizeof(BigBuf));
35 DbpString("Buffer cleared");
36 }
37
38 void ToSendReset(void)
39 {
40 ToSendMax = -1;
41 ToSendBit = 8;
42 }
43
44 void ToSendStuffBit(int b)
45 {
46 if(ToSendBit >= 8) {
47 ToSendMax++;
48 ToSend[ToSendMax] = 0;
49 ToSendBit = 0;
50 }
51
52 if(b) {
53 ToSend[ToSendMax] |= (1 << (7 - ToSendBit));
54 }
55
56 ToSendBit++;
57
58 if(ToSendBit >= sizeof(ToSend)) {
59 ToSendBit = 0;
60 DbpString("ToSendStuffBit overflowed!");
61 }
62 }
63
64 //=============================================================================
65 // Debug print functions, to go out over USB, to the usual PC-side client.
66 //=============================================================================
67
68 void DbpString(char *str)
69 {
70 UsbCommand c;
71 c.cmd = CMD_DEBUG_PRINT_STRING;
72 c.ext1 = strlen(str);
73 memcpy(c.d.asBytes, str, c.ext1);
74
75 UsbSendPacket((BYTE *)&c, sizeof(c));
76 // TODO fix USB so stupid things like this aren't req'd
77 SpinDelay(50);
78 }
79
80 void DbpIntegers(int x1, int x2, int x3)
81 {
82 UsbCommand c;
83 c.cmd = CMD_DEBUG_PRINT_INTEGERS;
84 c.ext1 = x1;
85 c.ext2 = x2;
86 c.ext3 = x3;
87
88 UsbSendPacket((BYTE *)&c, sizeof(c));
89 // XXX
90 SpinDelay(50);
91 }
92
93 void AcquireRawAdcSamples125k(BOOL at134khz)
94 {
95 if(at134khz) {
96 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
97 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ);
98 } else {
99 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
100 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ);
101 }
102
103 // Connect the A/D to the peak-detected low-frequency path.
104 SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
105
106 // Give it a bit of time for the resonant antenna to settle.
107 SpinDelay(50);
108
109 // Now set up the SSC to get the ADC samples that are now streaming at us.
110 FpgaSetupSsc();
111
112 // Now call the acquisition routine
113 DoAcquisition125k(at134khz);
114 }
115
116 // split into two routines so we can avoid timing issues after sending commands //
117 void DoAcquisition125k(BOOL at134khz)
118 {
119 BYTE *dest = (BYTE *)BigBuf;
120 int n = sizeof(BigBuf);
121 int i;
122
123 memset(dest,0,n);
124 i = 0;
125 for(;;) {
126 if(SSC_STATUS & (SSC_STATUS_TX_READY)) {
127 SSC_TRANSMIT_HOLDING = 0x43;
128 LED_D_ON();
129 }
130 if(SSC_STATUS & (SSC_STATUS_RX_READY)) {
131 dest[i] = (BYTE)SSC_RECEIVE_HOLDING;
132 i++;
133 LED_D_OFF();
134 if(i >= n) {
135 break;
136 }
137 }
138 }
139 DbpIntegers(dest[0], dest[1], at134khz);
140 }
141
142 void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,BYTE *command)
143 {
144 BOOL at134khz;
145
146 // see if 'h' was specified
147 if(command[strlen(command) - 1] == 'h')
148 at134khz= TRUE;
149 else
150 at134khz= FALSE;
151
152 if(at134khz) {
153 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
154 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ);
155 } else {
156 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
157 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ);
158 }
159
160 // Give it a bit of time for the resonant antenna to settle.
161 SpinDelay(50);
162
163 // Now set up the SSC to get the ADC samples that are now streaming at us.
164 FpgaSetupSsc();
165
166 // now modulate the reader field
167 while(*command != '\0' && *command != ' ')
168 {
169 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
170 LED_D_OFF();
171 SpinDelayUs(delay_off);
172 if(at134khz) {
173 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
174 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ);
175 } else {
176 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
177 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ);
178 }
179 LED_D_ON();
180 if(*(command++) == '0')
181 SpinDelayUs(period_0);
182 else
183 SpinDelayUs(period_1);
184 }
185 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
186 LED_D_OFF();
187 SpinDelayUs(delay_off);
188 if(at134khz) {
189 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
190 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ);
191 } else {
192 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
193 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ);
194 }
195
196 // now do the read
197 DoAcquisition125k(at134khz);
198 }
199
200 //-----------------------------------------------------------------------------
201 // Read an ADC channel and block till it completes, then return the result
202 // in ADC units (0 to 1023). Also a routine to average 32 samples and
203 // return that.
204 //-----------------------------------------------------------------------------
205 static int ReadAdc(int ch)
206 {
207 DWORD d;
208
209 ADC_CONTROL = ADC_CONTROL_RESET;
210 ADC_MODE = ADC_MODE_PRESCALE(32) | ADC_MODE_STARTUP_TIME(16) |
211 ADC_MODE_SAMPLE_HOLD_TIME(8);
212 ADC_CHANNEL_ENABLE = ADC_CHANNEL(ch);
213
214 ADC_CONTROL = ADC_CONTROL_START;
215 while(!(ADC_STATUS & ADC_END_OF_CONVERSION(ch)))
216 ;
217 d = ADC_CHANNEL_DATA(ch);
218
219 return d;
220 }
221
222 static int AvgAdc(int ch)
223 {
224 int i;
225 int a = 0;
226
227 for(i = 0; i < 32; i++) {
228 a += ReadAdc(ch);
229 }
230
231 return (a + 15) >> 5;
232 }
233
234 /*
235 * Sweeps the useful LF range of the proxmark from
236 * 46.8kHz (divisor=255) to 600kHz (divisor=19) and
237 * reads the voltage in the antenna: the result is a graph
238 * which should clearly show the resonating frequency of your
239 * LF antenna ( hopefully around 90 if it is tuned to 125kHz!)
240 */
241 void SweepLFrange()
242 {
243 BYTE *dest = (BYTE *)BigBuf;
244 int i;
245
246 // clear buffer
247 memset(BigBuf,0,sizeof(BigBuf));
248
249 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
250 for (i=255; i>19; i--) {
251 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i);
252 SpinDelay(20);
253 dest[i] = (137500 * AvgAdc(ADC_CHAN_LF)) >> 18;
254 }
255 }
256
257 void MeasureAntennaTuning(void)
258 {
259 // Impedances are Zc = 1/(j*omega*C), in ohms
260 #define LF_TUNING_CAP_Z 1273 // 1 nF @ 125 kHz
261 #define HF_TUNING_CAP_Z 235 // 50 pF @ 13.56 MHz
262
263 int vLf125, vLf134, vHf; // in mV
264
265 UsbCommand c;
266
267 // Let the FPGA drive the low-frequency antenna around 125 kHz.
268 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
269 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ);
270 SpinDelay(20);
271 vLf125 = AvgAdc(ADC_CHAN_LF);
272 // Vref = 3.3V, and a 10000:240 voltage divider on the input
273 // can measure voltages up to 137500 mV
274 vLf125 = (137500 * vLf125) >> 10;
275
276 // Let the FPGA drive the low-frequency antenna around 134 kHz.
277 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
278 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ);
279 SpinDelay(20);
280 vLf134 = AvgAdc(ADC_CHAN_LF);
281 // Vref = 3.3V, and a 10000:240 voltage divider on the input
282 // can measure voltages up to 137500 mV
283 vLf134 = (137500 * vLf134) >> 10;
284
285 // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
286 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
287 SpinDelay(20);
288 vHf = AvgAdc(ADC_CHAN_HF);
289 // Vref = 3300mV, and an 10:1 voltage divider on the input
290 // can measure voltages up to 33000 mV
291 vHf = (33000 * vHf) >> 10;
292
293 c.cmd = CMD_MEASURED_ANTENNA_TUNING;
294 c.ext1 = (vLf125 << 0) | (vLf134 << 16);
295 c.ext2 = vHf;
296 c.ext3 = (LF_TUNING_CAP_Z << 0) | (HF_TUNING_CAP_Z << 16);
297 UsbSendPacket((BYTE *)&c, sizeof(c));
298 }
299
300 void SimulateTagLowFrequency(int period)
301 {
302 int i;
303 BYTE *tab = (BYTE *)BigBuf;
304
305 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_SIMULATOR);
306
307 PIO_ENABLE = (1 << GPIO_SSC_DOUT) | (1 << GPIO_SSC_CLK);
308
309 PIO_OUTPUT_ENABLE = (1 << GPIO_SSC_DOUT);
310 PIO_OUTPUT_DISABLE = (1 << GPIO_SSC_CLK);
311
312 #define SHORT_COIL() LOW(GPIO_SSC_DOUT)
313 #define OPEN_COIL() HIGH(GPIO_SSC_DOUT)
314
315 i = 0;
316 for(;;) {
317 while(!(PIO_PIN_DATA_STATUS & (1<<GPIO_SSC_CLK))) {
318 if(BUTTON_PRESS()) {
319 return;
320 }
321 WDT_HIT();
322 }
323
324 LED_D_ON();
325 if(tab[i]) {
326 OPEN_COIL();
327 } else {
328 SHORT_COIL();
329 }
330 LED_D_OFF();
331
332 while(PIO_PIN_DATA_STATUS & (1<<GPIO_SSC_CLK)) {
333 if(BUTTON_PRESS()) {
334 return;
335 }
336 WDT_HIT();
337 }
338
339 i++;
340 if(i == period) i = 0;
341 }
342 }
343
344 // compose fc/8 fc/10 waveform
345 static void fc(int c, int *n) {
346 BYTE *dest = (BYTE *)BigBuf;
347 int idx;
348
349 // for when we want an fc8 pattern every 4 logical bits
350 if(c==0) {
351 dest[((*n)++)]=1;
352 dest[((*n)++)]=1;
353 dest[((*n)++)]=0;
354 dest[((*n)++)]=0;
355 dest[((*n)++)]=0;
356 dest[((*n)++)]=0;
357 dest[((*n)++)]=0;
358 dest[((*n)++)]=0;
359 }
360 // an fc/8 encoded bit is a bit pattern of 11000000 x6 = 48 samples
361 if(c==8) {
362 for (idx=0; idx<6; idx++) {
363 dest[((*n)++)]=1;
364 dest[((*n)++)]=1;
365 dest[((*n)++)]=0;
366 dest[((*n)++)]=0;
367 dest[((*n)++)]=0;
368 dest[((*n)++)]=0;
369 dest[((*n)++)]=0;
370 dest[((*n)++)]=0;
371 }
372 }
373
374 // an fc/10 encoded bit is a bit pattern of 1110000000 x5 = 50 samples
375 if(c==10) {
376 for (idx=0; idx<5; idx++) {
377 dest[((*n)++)]=1;
378 dest[((*n)++)]=1;
379 dest[((*n)++)]=1;
380 dest[((*n)++)]=0;
381 dest[((*n)++)]=0;
382 dest[((*n)++)]=0;
383 dest[((*n)++)]=0;
384 dest[((*n)++)]=0;
385 dest[((*n)++)]=0;
386 dest[((*n)++)]=0;
387 }
388 }
389 }
390
391 // prepare a waveform pattern in the buffer based on the ID given then
392 // simulate a HID tag until the button is pressed
393 static void CmdHIDsimTAG(int hi, int lo)
394 {
395 int n=0, i=0;
396 /*
397 HID tag bitstream format
398 The tag contains a 44bit unique code. This is sent out MSB first in sets of 4 bits
399 A 1 bit is represented as 6 fc8 and 5 fc10 patterns
400 A 0 bit is represented as 5 fc10 and 6 fc8 patterns
401 A fc8 is inserted before every 4 bits
402 A special start of frame pattern is used consisting a0b0 where a and b are neither 0
403 nor 1 bits, they are special patterns (a = set of 12 fc8 and b = set of 10 fc10)
404 */
405
406 if (hi>0xFFF) {
407 DbpString("Tags can only have 44 bits.");
408 return;
409 }
410 fc(0,&n);
411 // special start of frame marker containing invalid bit sequences
412 fc(8, &n); fc(8, &n); // invalid
413 fc(8, &n); fc(10, &n); // logical 0
414 fc(10, &n); fc(10, &n); // invalid
415 fc(8, &n); fc(10, &n); // logical 0
416
417 WDT_HIT();
418 // manchester encode bits 43 to 32
419 for (i=11; i>=0; i--) {
420 if ((i%4)==3) fc(0,&n);
421 if ((hi>>i)&1) {
422 fc(10, &n); fc(8, &n); // low-high transition
423 } else {
424 fc(8, &n); fc(10, &n); // high-low transition
425 }
426 }
427
428 WDT_HIT();
429 // manchester encode bits 31 to 0
430 for (i=31; i>=0; i--) {
431 if ((i%4)==3) fc(0,&n);
432 if ((lo>>i)&1) {
433 fc(10, &n); fc(8, &n); // low-high transition
434 } else {
435 fc(8, &n); fc(10, &n); // high-low transition
436 }
437 }
438
439 LED_A_ON();
440 SimulateTagLowFrequency(n);
441 LED_A_OFF();
442 }
443
444 // loop to capture raw HID waveform then FSK demodulate the TAG ID from it
445 static void CmdHIDdemodFSK(void)
446 {
447 BYTE *dest = (BYTE *)BigBuf;
448 int m=0, n=0, i=0, idx=0, found=0, lastval=0;
449 DWORD hi=0, lo=0;
450
451 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
452 FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ);
453
454 // Connect the A/D to the peak-detected low-frequency path.
455 SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
456
457 // Give it a bit of time for the resonant antenna to settle.
458 SpinDelay(50);
459
460 // Now set up the SSC to get the ADC samples that are now streaming at us.
461 FpgaSetupSsc();
462
463 for(;;) {
464 WDT_HIT();
465 LED_A_ON();
466 if(BUTTON_PRESS()) {
467 LED_A_OFF();
468 return;
469 }
470
471 i = 0;
472 m = sizeof(BigBuf);
473 memset(dest,128,m);
474 for(;;) {
475 if(SSC_STATUS & (SSC_STATUS_TX_READY)) {
476 SSC_TRANSMIT_HOLDING = 0x43;
477 LED_D_ON();
478 }
479 if(SSC_STATUS & (SSC_STATUS_RX_READY)) {
480 dest[i] = (BYTE)SSC_RECEIVE_HOLDING;
481 // we don't care about actual value, only if it's more or less than a
482 // threshold essentially we capture zero crossings for later analysis
483 if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
484 i++;
485 LED_D_OFF();
486 if(i >= m) {
487 break;
488 }
489 }
490 }
491
492 // FSK demodulator
493
494 // sync to first lo-hi transition
495 for( idx=1; idx<m; idx++) {
496 if (dest[idx-1]<dest[idx])
497 lastval=idx;
498 break;
499 }
500 WDT_HIT();
501
502 // count cycles between consecutive lo-hi transitions, there should be either 8 (fc/8)
503 // or 10 (fc/10) cycles but in practice due to noise etc we may end up with with anywhere
504 // between 7 to 11 cycles so fuzz it by treat anything <9 as 8 and anything else as 10
505 for( i=0; idx<m; idx++) {
506 if (dest[idx-1]<dest[idx]) {
507 dest[i]=idx-lastval;
508 if (dest[i] <= 8) {
509 dest[i]=1;
510 } else {
511 dest[i]=0;
512 }
513
514 lastval=idx;
515 i++;
516 }
517 }
518 m=i;
519 WDT_HIT();
520
521 // we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
522 lastval=dest[0];
523 idx=0;
524 i=0;
525 n=0;
526 for( idx=0; idx<m; idx++) {
527 if (dest[idx]==lastval) {
528 n++;
529 } else {
530 // a bit time is five fc/10 or six fc/8 cycles so figure out how many bits a pattern width represents,
531 // an extra fc/8 pattern preceeds every 4 bits (about 200 cycles) just to complicate things but it gets
532 // swallowed up by rounding
533 // expected results are 1 or 2 bits, any more and it's an invalid manchester encoding
534 // special start of frame markers use invalid manchester states (no transitions) by using sequences
535 // like 111000
536 if (dest[idx-1]) {
537 n=(n+1)/6; // fc/8 in sets of 6
538 } else {
539 n=(n+1)/5; // fc/10 in sets of 5
540 }
541 switch (n) { // stuff appropriate bits in buffer
542 case 0:
543 case 1: // one bit
544 dest[i++]=dest[idx-1];
545 break;
546 case 2: // two bits
547 dest[i++]=dest[idx-1];
548 dest[i++]=dest[idx-1];
549 break;
550 case 3: // 3 bit start of frame markers
551 dest[i++]=dest[idx-1];
552 dest[i++]=dest[idx-1];
553 dest[i++]=dest[idx-1];
554 break;
555 // When a logic 0 is immediately followed by the start of the next transmisson
556 // (special pattern) a pattern of 4 bit duration lengths is created.
557 case 4:
558 dest[i++]=dest[idx-1];
559 dest[i++]=dest[idx-1];
560 dest[i++]=dest[idx-1];
561 dest[i++]=dest[idx-1];
562 break;
563 default: // this shouldn't happen, don't stuff any bits
564 break;
565 }
566 n=0;
567 lastval=dest[idx];
568 }
569 }
570 m=i;
571 WDT_HIT();
572
573 // final loop, go over previously decoded manchester data and decode into usable tag ID
574 // 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0
575 for( idx=0; idx<m-6; idx++) {
576 // search for a start of frame marker
577 if ( dest[idx] && dest[idx+1] && dest[idx+2] && (!dest[idx+3]) && (!dest[idx+4]) && (!dest[idx+5]) )
578 {
579 found=1;
580 idx+=6;
581 if (found && (hi|lo)) {
582 DbpString("TAG ID");
583 DbpIntegers(hi, lo, (lo>>1)&0xffff);
584 hi=0;
585 lo=0;
586 found=0;
587 }
588 }
589 if (found) {
590 if (dest[idx] && (!dest[idx+1]) ) {
591 hi=(hi<<1)|(lo>>31);
592 lo=(lo<<1)|0;
593 } else if ( (!dest[idx]) && dest[idx+1]) {
594 hi=(hi<<1)|(lo>>31);
595 lo=(lo<<1)|1;
596 } else {
597 found=0;
598 hi=0;
599 lo=0;
600 }
601 idx++;
602 }
603 if ( dest[idx] && dest[idx+1] && dest[idx+2] && (!dest[idx+3]) && (!dest[idx+4]) && (!dest[idx+5]) )
604 {
605 found=1;
606 idx+=6;
607 if (found && (hi|lo)) {
608 DbpString("TAG ID");
609 DbpIntegers(hi, lo, (lo>>1)&0xffff);
610 hi=0;
611 lo=0;
612 found=0;
613 }
614 }
615 }
616 WDT_HIT();
617 }
618 }
619
620 void SimulateTagHfListen(void)
621 {
622 BYTE *dest = (BYTE *)BigBuf;
623 int n = sizeof(BigBuf);
624 BYTE v = 0;
625 int i;
626 int p = 0;
627
628 // We're using this mode just so that I can test it out; the simulated
629 // tag mode would work just as well and be simpler.
630 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP);
631
632 // We need to listen to the high-frequency, peak-detected path.
633 SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
634
635 FpgaSetupSsc();
636
637 i = 0;
638 for(;;) {
639 if(SSC_STATUS & (SSC_STATUS_TX_READY)) {
640 SSC_TRANSMIT_HOLDING = 0xff;
641 }
642 if(SSC_STATUS & (SSC_STATUS_RX_READY)) {
643 BYTE r = (BYTE)SSC_RECEIVE_HOLDING;
644
645 v <<= 1;
646 if(r & 1) {
647 v |= 1;
648 }
649 p++;
650
651 if(p >= 8) {
652 dest[i] = v;
653 v = 0;
654 p = 0;
655 i++;
656
657 if(i >= n) {
658 break;
659 }
660 }
661 }
662 }
663 DbpString("simulate tag (now type bitsamples)");
664 }
665
666 void UsbPacketReceived(BYTE *packet, int len)
667 {
668 UsbCommand *c = (UsbCommand *)packet;
669
670 switch(c->cmd) {
671 case CMD_ACQUIRE_RAW_ADC_SAMPLES_125K:
672 AcquireRawAdcSamples125k(c->ext1);
673 break;
674
675 case CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K:
676 ModThenAcquireRawAdcSamples125k(c->ext1,c->ext2,c->ext3,c->d.asBytes);
677 break;
678
679 case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693:
680 AcquireRawAdcSamplesIso15693();
681 break;
682
683 case CMD_BUFF_CLEAR:
684 BufferClear();
685 break;
686
687 case CMD_READER_ISO_15693:
688 ReaderIso15693(c->ext1);
689 break;
690
691 case CMD_SIMTAG_ISO_15693:
692 SimTagIso15693(c->ext1);
693 break;
694
695 case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443:
696 AcquireRawAdcSamplesIso14443(c->ext1);
697 break;
698
699 case CMD_READ_SRI512_TAG:
700 ReadSRI512Iso14443(c->ext1);
701 break;
702
703 case CMD_READER_ISO_14443a:
704 ReaderIso14443a(c->ext1);
705 break;
706
707 case CMD_SNOOP_ISO_14443:
708 SnoopIso14443();
709 break;
710
711 case CMD_SNOOP_ISO_14443a:
712 SnoopIso14443a();
713 break;
714
715 case CMD_SIMULATE_TAG_HF_LISTEN:
716 SimulateTagHfListen();
717 break;
718
719 case CMD_SIMULATE_TAG_ISO_14443:
720 SimulateIso14443Tag();
721 break;
722
723 case CMD_SIMULATE_TAG_ISO_14443a:
724 SimulateIso14443aTag(c->ext1, c->ext2); // ## Simulate iso14443a tag - pass tag type & UID
725 break;
726
727 case CMD_MEASURE_ANTENNA_TUNING:
728 MeasureAntennaTuning();
729 break;
730
731 case CMD_LISTEN_READER_FIELD:
732 ListenReaderField(c->ext1);
733 break;
734
735 case CMD_HID_DEMOD_FSK:
736 CmdHIDdemodFSK(); // Demodulate HID tag
737 break;
738
739 case CMD_HID_SIM_TAG:
740 CmdHIDsimTAG(c->ext1, c->ext2); // Simulate HID tag by ID
741 break;
742
743 case CMD_FPGA_MAJOR_MODE_OFF: // ## FPGA Control
744 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
745 SpinDelay(200);
746 LED_D_OFF(); // LED D indicates field ON or OFF
747 break;
748
749 case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K:
750 case CMD_DOWNLOAD_RAW_BITS_TI_TYPE: {
751 UsbCommand n;
752 if(c->cmd == CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K) {
753 n.cmd = CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K;
754 } else {
755 n.cmd = CMD_DOWNLOADED_RAW_BITS_TI_TYPE;
756 }
757 n.ext1 = c->ext1;
758 memcpy(n.d.asDwords, BigBuf+c->ext1, 12*sizeof(DWORD));
759 UsbSendPacket((BYTE *)&n, sizeof(n));
760 break;
761 }
762 case CMD_DOWNLOADED_SIM_SAMPLES_125K: {
763 BYTE *b = (BYTE *)BigBuf;
764 memcpy(b+c->ext1, c->d.asBytes, 48);
765 break;
766 }
767 case CMD_SIMULATE_TAG_125K:
768 LED_A_ON();
769 SimulateTagLowFrequency(c->ext1);
770 LED_A_OFF();
771 break;
772 #ifdef WITH_LCD
773 case CMD_LCD_RESET:
774 LCDReset();
775 break;
776 #endif
777 case CMD_SWEEP_LF:
778 SweepLFrange();
779 break;
780
781 case CMD_SET_LF_DIVISOR:
782 FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->ext1);
783 break;
784 #ifdef WITH_LCD
785 case CMD_LCD:
786 LCDSend(c->ext1);
787 break;
788 #endif
789 case CMD_SETUP_WRITE:
790 case CMD_FINISH_WRITE:
791 case CMD_HARDWARE_RESET:
792 USB_D_PLUS_PULLUP_OFF();
793 SpinDelay(1000);
794 SpinDelay(1000);
795 RSTC_CONTROL = RST_CONTROL_KEY | RST_CONTROL_PROCESSOR_RESET;
796 for(;;) {
797 // We're going to reset, and the bootrom will take control.
798 }
799 break;
800
801
802 default:
803 DbpString("unknown command");
804 break;
805 }
806 }
807
808 void AppMain(void)
809 {
810 memset(BigBuf,0,sizeof(BigBuf));
811 SpinDelay(100);
812
813 LED_D_OFF();
814 LED_C_OFF();
815 LED_B_OFF();
816 LED_A_OFF();
817
818 UsbStart();
819
820 // The FPGA gets its clock from us from PCK0 output, so set that up.
821 PIO_PERIPHERAL_B_SEL = (1 << GPIO_PCK0);
822 PIO_DISABLE = (1 << GPIO_PCK0);
823 PMC_SYS_CLK_ENABLE = PMC_SYS_CLK_PROGRAMMABLE_CLK_0;
824 // PCK0 is PLL clock / 4 = 96Mhz / 4 = 24Mhz
825 PMC_PROGRAMMABLE_CLK_0 = PMC_CLK_SELECTION_PLL_CLOCK |
826 PMC_CLK_PRESCALE_DIV_4;
827 PIO_OUTPUT_ENABLE = (1 << GPIO_PCK0);
828
829 // Reset SPI
830 SPI_CONTROL = SPI_CONTROL_RESET;
831 // Reset SSC
832 SSC_CONTROL = SSC_CONTROL_RESET;
833
834 // Load the FPGA image, which we have stored in our flash.
835 FpgaDownloadAndGo();
836
837 #ifdef WITH_LCD
838
839 LCDInit();
840
841 // test text on different colored backgrounds
842 LCDString(" The quick brown fox ", &FONT6x8,1,1+8*0,WHITE ,BLACK );
843 LCDString(" jumped over the ", &FONT6x8,1,1+8*1,BLACK ,WHITE );
844 LCDString(" lazy dog. ", &FONT6x8,1,1+8*2,YELLOW ,RED );
845 LCDString(" AaBbCcDdEeFfGgHhIiJj ", &FONT6x8,1,1+8*3,RED ,GREEN );
846 LCDString(" KkLlMmNnOoPpQqRrSsTt ", &FONT6x8,1,1+8*4,MAGENTA,BLUE );
847 LCDString("UuVvWwXxYyZz0123456789", &FONT6x8,1,1+8*5,BLUE ,YELLOW);
848 LCDString("`-=[]_;',./~!@#$%^&*()", &FONT6x8,1,1+8*6,BLACK ,CYAN );
849 LCDString(" _+{}|:\\\"<>? ",&FONT6x8,1,1+8*7,BLUE ,MAGENTA);
850
851 // color bands
852 LCDFill(0, 1+8* 8, 132, 8, BLACK);
853 LCDFill(0, 1+8* 9, 132, 8, WHITE);
854 LCDFill(0, 1+8*10, 132, 8, RED);
855 LCDFill(0, 1+8*11, 132, 8, GREEN);
856 LCDFill(0, 1+8*12, 132, 8, BLUE);
857 LCDFill(0, 1+8*13, 132, 8, YELLOW);
858 LCDFill(0, 1+8*14, 132, 8, CYAN);
859 LCDFill(0, 1+8*15, 132, 8, MAGENTA);
860
861 #endif
862
863 for(;;) {
864 UsbPoll(FALSE);
865 WDT_HIT();
866 }
867 }
868
869 void SpinDelayUs(int us)
870 {
871 int ticks = (48*us) >> 10;
872
873 // Borrow a PWM unit for my real-time clock
874 PWM_ENABLE = PWM_CHANNEL(0);
875 // 48 MHz / 1024 gives 46.875 kHz
876 PWM_CH_MODE(0) = PWM_CH_MODE_PRESCALER(10);
877 PWM_CH_DUTY_CYCLE(0) = 0;
878 PWM_CH_PERIOD(0) = 0xffff;
879
880 WORD start = (WORD)PWM_CH_COUNTER(0);
881
882 for(;;) {
883 WORD now = (WORD)PWM_CH_COUNTER(0);
884 if(now == (WORD)(start + ticks)) {
885 return;
886 }
887 WDT_HIT();
888 }
889 }
890
891 void SpinDelay(int ms)
892 {
893 int ticks = (48000*ms) >> 10;
894
895 // Borrow a PWM unit for my real-time clock
896 PWM_ENABLE = PWM_CHANNEL(0);
897 // 48 MHz / 1024 gives 46.875 kHz
898 PWM_CH_MODE(0) = PWM_CH_MODE_PRESCALER(10);
899 PWM_CH_DUTY_CYCLE(0) = 0;
900 PWM_CH_PERIOD(0) = 0xffff;
901
902 WORD start = (WORD)PWM_CH_COUNTER(0);
903
904 for(;;) {
905 WORD now = (WORD)PWM_CH_COUNTER(0);
906 if(now == (WORD)(start + ticks)) {
907 return;
908 }
909 WDT_HIT();
910 }
911 }
912
913 // listen for external reader
914 void ListenReaderField(int limit)
915 {
916 int lf_av, lf_av_new, lf_baseline= -1, lf_count= 0;
917 int hf_av, hf_av_new, hf_baseline= -1, hf_count= 0;
918
919 #define LF_ONLY 1
920 #define HF_ONLY 2
921
922 LED_A_OFF();
923 LED_B_OFF();
924 LED_C_OFF();
925 LED_D_OFF();
926
927 lf_av= ReadAdc(ADC_CHAN_LF);
928
929 if(limit != HF_ONLY && lf_baseline == -1)
930 {
931 DbpString("LF 125/134 Baseline:");
932 DbpIntegers(lf_av,0,0);
933 lf_baseline= lf_av;
934 }
935
936 hf_av= ReadAdc(ADC_CHAN_HF);
937
938
939 if (limit != LF_ONLY && hf_baseline == -1)
940 {
941 DbpString("HF 13.56 Baseline:");
942 DbpIntegers(hf_av,0,0);
943 hf_baseline= hf_av;
944 }
945
946 for(;;)
947 {
948 if(BUTTON_PRESS())
949 {
950 LED_B_OFF();
951 LED_D_OFF();
952 return;
953 }
954 WDT_HIT();
955
956
957 if (limit != HF_ONLY)
958 {
959 if (abs(lf_av - lf_baseline) > 10)
960 LED_D_ON();
961 else
962 LED_D_OFF();
963 ++lf_count;
964 lf_av_new= ReadAdc(ADC_CHAN_LF);
965 // see if there's a significant change
966 if(abs(lf_av - lf_av_new) > 10)
967 {
968 DbpString("LF 125/134 Field Change:");
969 DbpIntegers(lf_av,lf_av_new,lf_count);
970 lf_av= lf_av_new;
971 lf_count= 0;
972 }
973 }
974
975 if (limit != LF_ONLY)
976 {
977 if (abs(hf_av - hf_baseline) > 10)
978 LED_B_ON();
979 else
980 LED_B_OFF();
981 ++hf_count;
982 hf_av_new= ReadAdc(ADC_CHAN_HF);
983 // see if there's a significant change
984 if(abs(hf_av - hf_av_new) > 10)
985 {
986 DbpString("HF 13.56 Field Change:");
987 DbpIntegers(hf_av,hf_av_new,hf_count);
988 hf_av= hf_av_new;
989 hf_count= 0;
990 }
991 }
992 }
993 }
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