DoAcquisition125k(at134khz);
}
-//-----------------------------------------------------------------------------
-// Read a TI-type tag. We assume that the tag has already been illuminated,
-// and that the exciting signal has been turned off. That means that we just
-// acquire the `one-bit DAC' bits from the comparator.
-//-----------------------------------------------------------------------------
void AcquireTiType(void)
{
int i;
- int n = sizeof(BigBuf);
+ int n = 5000;
// clear buffer
memset(BigBuf,0,sizeof(BigBuf));
- // Set up the synchronous serial port
+ // Set up the synchronous serial port
PIO_DISABLE = (1<<GPIO_SSC_DIN);
PIO_PERIPHERAL_A_SEL = (1<<GPIO_SSC_DIN);
+ // steal this pin from the SSP and use it to control the modulation
+ PIO_ENABLE = (1<<GPIO_SSC_DOUT);
+ PIO_OUTPUT_ENABLE = (1<<GPIO_SSC_DOUT);
+
SSC_CONTROL = SSC_CONTROL_RESET;
SSC_CONTROL = SSC_CONTROL_RX_ENABLE | SSC_CONTROL_TX_ENABLE;
SSC_CLOCK_DIVISOR = 12;
SSC_RECEIVE_CLOCK_MODE = SSC_CLOCK_MODE_SELECT(0);
- SSC_RECEIVE_FRAME_MODE = SSC_FRAME_MODE_BITS_IN_WORD(32) | SSC_FRAME_MODE_MSB_FIRST;
- SSC_TRANSMIT_CLOCK_MODE = 0;
- SSC_TRANSMIT_FRAME_MODE = 0;
-
- i = 0;
- for(;;) {
- if(SSC_STATUS & SSC_STATUS_RX_READY) {
- BigBuf[i] = SSC_RECEIVE_HOLDING; // store 32 bit values in buffer
- i++; if(i >= n) return;
- }
- WDT_HIT();
- }
-}
+ SSC_RECEIVE_FRAME_MODE = SSC_FRAME_MODE_BITS_IN_WORD(32) | SSC_FRAME_MODE_MSB_FIRST;
+ SSC_TRANSMIT_CLOCK_MODE = 0;
+ SSC_TRANSMIT_FRAME_MODE = 0;
-void AcquireRawBitsTI(void)
-{
LED_D_ON();
- // TI tags charge at 134.2Khz
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
- FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+
+ // modulate antenna
+ PIO_OUTPUT_DATA_SET = (1<<GPIO_SSC_DOUT);
// Charge TI tag for 50ms.
SpinDelay(50);
+
+ // stop modulating antenna and listen
+ PIO_OUTPUT_DATA_CLEAR = (1<<GPIO_SSC_DOUT);
+
LED_D_OFF();
- LED_A_ON();
- // Place FPGA in passthrough mode so as to stop driving the LF coil,
- // in this mode the CROSS_LO line connects to SSP_DIN
+ i = 0;
+ for(;;) {
+ if(SSC_STATUS & SSC_STATUS_RX_READY) {
+ BigBuf[i] = SSC_RECEIVE_HOLDING; // store 32 bit values in buffer
+ i++; if(i >= n) return;
+ }
+ WDT_HIT();
+ }
+
+ // return stolen pin to SSP
+ PIO_DISABLE = (1<<GPIO_SSC_DOUT);
+ PIO_PERIPHERAL_A_SEL = (1<<GPIO_SSC_DIN) | (1<<GPIO_SSC_DOUT);
+}
+
+void AcquireRawBitsTI(void)
+{
+ LED_D_ON();
+ // 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);
// get TI tag data into the buffer
AcquireTiType();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- LED_A_OFF();
}
//-----------------------------------------------------------------------------
}
-// listen for external reader
-void ListenReaderField(int limit)
-{
- int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0;
- int hf_av, hf_av_new, hf_baseline= 0, hf_count= 0;
-
-#define LF_ONLY 1
-#define HF_ONLY 2
-
- LED_A_OFF();
- LED_B_OFF();
- LED_C_OFF();
- LED_D_OFF();
-
- lf_av= ReadAdc(ADC_CHAN_LF);
-
- if(limit != HF_ONLY)
- {
- DbpString("LF 125/134 Baseline:");
- DbpIntegers(lf_av,0,0);
- lf_baseline= lf_av;
- }
-
- hf_av= ReadAdc(ADC_CHAN_HF);
-
-
- if (limit != LF_ONLY)
- {
- DbpString("HF 13.56 Baseline:");
- DbpIntegers(hf_av,0,0);
- hf_baseline= hf_av;
- }
-
- for(;;)
- {
- if(BUTTON_PRESS())
- {
- DbpString("Stopped");
- LED_B_OFF();
- LED_D_OFF();
- return;
- }
- WDT_HIT();
-
-
- if (limit != HF_ONLY)
- {
- if (abs(lf_av - lf_baseline) > 10)
- LED_D_ON();
- else
- LED_D_OFF();
- ++lf_count;
- lf_av_new= ReadAdc(ADC_CHAN_LF);
- // see if there's a significant change
- if(abs(lf_av - lf_av_new) > 10)
- {
- DbpString("LF 125/134 Field Change:");
- DbpIntegers(lf_av,lf_av_new,lf_count);
- lf_av= lf_av_new;
- lf_count= 0;
- }
- }
-
- if (limit != LF_ONLY)
- {
- if (abs(hf_av - hf_baseline) > 10)
- LED_B_ON();
- else
- LED_B_OFF();
- ++hf_count;
- hf_av_new= ReadAdc(ADC_CHAN_HF);
- // see if there's a significant change
- if(abs(hf_av - hf_av_new) > 10)
- {
- DbpString("HF 13.56 Field Change:");
- DbpIntegers(hf_av,hf_av_new,hf_count);
- hf_av= hf_av_new;
- hf_count= 0;
- }
- }
- }
-}
+/* \r
+OBJECTIVE\r
+Listen and detect an external reader. Determine the best location\r
+for the antenna.\r
+\r
+INSTRUCTIONS:\r
+Inside the ListenReaderField() function, there is two mode. \r
+By default, when you call the function, you will enter mode 1.\r
+If you press the PM3 button one time, you will enter mode 2.\r
+If you press the PM3 button a second time, you will exit the function.\r
+\r
+DESCRIPTION OF MODE 1:\r
+This mode just listens for an external reader field and lights up green \r
+for HF and/or red for LF. This is the original mode of the detectreader\r
+function.\r
+\r
+DESCRIPTION OF MODE 2:\r
+This mode will visually represent, using the LEDs, the actual strength of the\r
+current compared to the maximum current detected. Basically, once you know \r
+what kind of external reader is present, it will help you spot the best location to place\r
+your antenna. You will probably not get some good results if there is a LF and a HF reader\r
+at the same place! :-)\r
+\r
+LIGHT SCHEME USED:\r
+\r
+Light scheme | Descriptiong\r
+----------------------------------------------------\r
+ ---- | No field detected\r
+ X--- | 14% of maximum current detected\r
+ -X-- | 29% of maximum current detected\r
+ --X- | 43% of maximum current detected\r
+ ---X | 57% of maximum current detected\r
+ --XX | 71% of maximum current detected\r
+ -XXX | 86% of maximum current detected\r
+ XXXX | 100% of maximum current detected\r
+\r
+TODO:\r
+Add the LF part for MODE 2\r
+\r
+*/\r
+void ListenReaderField(int limit)\r
+{\r
+ int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0;\r
+ int hf_av, hf_av_new, hf_baseline= 0, hf_count= 0, hf_max;\r
+ int mode=1;\r
+\r
+#define LF_ONLY 1\r
+#define HF_ONLY 2\r
+\r
+ LED_A_OFF();\r
+ LED_B_OFF();\r
+ LED_C_OFF();\r
+ LED_D_OFF();\r
+\r
+ lf_av= ReadAdc(ADC_CHAN_LF);\r
+\r
+ if(limit != HF_ONLY) \r
+ {\r
+ DbpString("LF 125/134 Baseline:");\r
+ DbpIntegers(lf_av,0,0);\r
+ lf_baseline= lf_av;\r
+ }\r
+\r
+ hf_av=hf_max=ReadAdc(ADC_CHAN_HF);\r
+\r
+ if (limit != LF_ONLY) \r
+ {\r
+ DbpString("HF 13.56 Baseline:");\r
+ DbpIntegers(hf_av,0,0);\r
+ hf_baseline= hf_av;\r
+ }\r
+\r
+ for(;;) \r
+ {\r
+ if (BUTTON_PRESS()) {\r
+ SpinDelay(500);\r
+ switch (mode) {\r
+ case 1:\r
+ mode=2;\r
+ DbpString("Signal Strength Mode");
+ break;\r
+ case 2:\r
+ default:\r
+ DbpString("Stopped");\r
+ LED_A_OFF();\r
+ LED_B_OFF();\r
+ LED_C_OFF();\r
+ LED_D_OFF();\r
+ return;\r
+ break;\r
+ }\r
+ }\r
+ WDT_HIT();\r
+\r
+ if (limit != HF_ONLY) \r
+ {\r
+ if (abs(lf_av - lf_baseline) > 10)\r
+ LED_D_ON();\r
+ else\r
+ LED_D_OFF();\r
+ ++lf_count;\r
+ lf_av_new= ReadAdc(ADC_CHAN_LF);\r
+ // see if there's a significant change\r
+ if(abs(lf_av - lf_av_new) > 10) \r
+ {\r
+ DbpString("LF 125/134 Field Change:");\r
+ DbpIntegers(lf_av,lf_av_new,lf_count);\r
+ lf_av= lf_av_new;\r
+ lf_count= 0;\r
+ }\r
+ }\r
+\r
+ if (limit != LF_ONLY) \r
+ {\r
+ if (abs(hf_av - hf_baseline) > 10) {\r
+ if (mode == 1)\r
+ LED_B_ON();\r
+ if (mode == 2) {\r
+ if ( hf_av>(hf_max/7)*6) {\r
+ LED_A_ON(); LED_B_ON(); LED_C_ON(); LED_D_ON();\r
+ }\r
+ if ( (hf_av>(hf_max/7)*5) && (hf_av<=(hf_max/7)*6) ) {\r
+ LED_A_ON(); LED_B_ON(); LED_C_OFF(); LED_D_ON();\r
+ }\r
+ if ( (hf_av>(hf_max/7)*4) && (hf_av<=(hf_max/7)*5) ) {\r
+ LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_ON();\r
+ }\r
+ if ( (hf_av>(hf_max/7)*3) && (hf_av<=(hf_max/7)*4) ) {\r
+ LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_ON();\r
+ }\r
+ if ( (hf_av>(hf_max/7)*2) && (hf_av<=(hf_max/7)*3) ) {\r
+ LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_OFF();\r
+ }\r
+ if ( (hf_av>(hf_max/7)*1) && (hf_av<=(hf_max/7)*2) ) {\r
+ LED_A_ON(); LED_B_OFF(); LED_C_OFF(); LED_D_OFF();\r
+ }\r
+ if ( (hf_av>(hf_max/7)*0) && (hf_av<=(hf_max/7)*1) ) {\r
+ LED_A_OFF(); LED_B_OFF(); LED_C_ON(); LED_D_OFF();\r
+ }\r
+ } \r
+ } else {\r
+ if (mode == 1) {\r
+ LED_B_OFF();\r
+ }\r
+ if (mode == 2) {\r
+ LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_OFF();\r
+ }\r
+ }\r
+\r
+ ++hf_count;\r
+ hf_av_new= ReadAdc(ADC_CHAN_HF);\r
+ // see if there's a significant change\r
+ if(abs(hf_av - hf_av_new) > 10) \r
+ {\r
+ DbpString("HF 13.56 Field Change:");\r
+ DbpIntegers(hf_av,hf_av_new,hf_count);\r
+ hf_av= hf_av_new;\r
+ if (hf_av > hf_max)\r
+ hf_max = hf_av;\r
+ hf_count= 0;\r
+ }\r
+ }\r
+ }\r
+}\r
+\r
projects / proxmark3-svn / blobdiff