X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/8949e0458403298a700340bd304f501dd7577fbb..34212c662c0448143733b60484a83b371325e4a7:/armsrc/lfsampling.c?ds=sidebyside
diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 115d4b18..72aabe00 100644
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -10,8 +10,9 @@
#include "apps.h"
#include "util.h"
#include "string.h"
-
#include "lfsampling.h"
+#include "usb_cdc.h" // for usb_poll_validate_length
+//#include "ticks.h" // for StartTicks
sample_config config = { 1, 8, 1, 95, 0 } ;
@@ -124,7 +125,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
uint8_t *dest = BigBuf_get_addr();
int bufsize = BigBuf_max_traceLen();
- memset(dest, 0, bufsize);
+ //memset(dest, 0, bufsize); //creates issues with cmdread (marshmellow)
if(bits_per_sample < 1) bits_per_sample = 1;
if(bits_per_sample > 8) bits_per_sample = 8;
@@ -140,7 +141,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
uint32_t sample_total_numbers =0 ;
uint32_t sample_total_saved =0 ;
- while(!BUTTON_PRESS()) {
+ while(!BUTTON_PRESS() && !usb_poll_validate_length() ) {
WDT_HIT();
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
AT91C_BASE_SSC->SSC_THR = 0x43;
@@ -237,7 +238,9 @@ uint32_t ReadLF(bool activeField, bool silent)
**/
uint32_t SampleLF(bool printCfg)
{
- return ReadLF(true, printCfg);
+ uint32_t ret = ReadLF(true, printCfg);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ return ret;
}
/**
* Initializes the FPGA for snoop-mode (field off), and acquires the samples.
@@ -246,7 +249,9 @@ uint32_t SampleLF(bool printCfg)
uint32_t SnoopLF()
{
- return ReadLF(false, true);
+ uint32_t ret = ReadLF(false, true);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ return ret;
}
/**
@@ -255,7 +260,8 @@ uint32_t SnoopLF()
**/
void doT55x7Acquisition(size_t sample_size) {
- #define T55xx_READ_UPPER_THRESHOLD 128+40 // 40 grph
+ #define T55xx_READ_UPPER_THRESHOLD 128+60 // 60 grph
+ #define T55xx_READ_LOWER_THRESHOLD 128-60 // -60 grph
#define T55xx_READ_TOL 5
uint8_t *dest = BigBuf_get_addr();
@@ -267,10 +273,11 @@ void doT55x7Acquisition(size_t sample_size) {
uint16_t i = 0;
bool startFound = false;
bool highFound = false;
+ bool lowFound = false;
uint8_t curSample = 0;
- uint8_t firstSample = 0;
+ uint8_t lastSample = 0;
uint16_t skipCnt = 0;
- while(!BUTTON_PRESS() && skipCnt<1000) {
+ while(!BUTTON_PRESS() && !usb_poll_validate_length() && skipCnt<1000 && i<bufsize ) {
WDT_HIT();
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
AT91C_BASE_SSC->SSC_THR = 0x43;
@@ -282,25 +289,156 @@ void doT55x7Acquisition(size_t sample_size) {
// skip until the first high sample above threshold
if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
- if (curSample > firstSample)
- firstSample = curSample;
+ //if (curSample > lastSample)
+ // lastSample = curSample;
highFound = true;
} else if (!highFound) {
skipCnt++;
continue;
}
+ // skip until the first Low sample below threshold
+ if (!startFound && curSample < T55xx_READ_LOWER_THRESHOLD) {
+ //if (curSample > lastSample)
+ lastSample = curSample;
+ lowFound = true;
+ } else if (!lowFound) {
+ skipCnt++;
+ continue;
+ }
+
// skip until first high samples begin to change
- if (startFound || curSample < firstSample-T55xx_READ_TOL){
+ if (startFound || curSample > T55xx_READ_LOWER_THRESHOLD+T55xx_READ_TOL){
// if just found start - recover last sample
if (!startFound) {
- dest[i++] = firstSample;
+ dest[i++] = lastSample;
startFound = true;
}
// collect samples
dest[i++] = curSample;
- if (i >= bufsize-1) break;
}
}
}
}
+
+/**
+* acquisition of Cotag LF signal. Similart to other LF, since the Cotag has such long datarate RF/384
+* and is Manchester?, we directly gather the manchester data into bigbuff
+**/
+#define COTAG_T1 384
+#define COTAG_T2 (COTAG_T1>>1)
+#define COTAG_ONE_THRESHOLD 128+30
+#define COTAG_ZERO_THRESHOLD 128-30
+#ifndef COTAG_BITS
+#define COTAG_BITS 264
+#endif
+void doCotagAcquisition(size_t sample_size) {
+
+ uint8_t *dest = BigBuf_get_addr();
+ uint16_t bufsize = BigBuf_max_traceLen();
+
+ if ( bufsize > sample_size )
+ bufsize = sample_size;
+
+ dest[0] = 0;
+ uint8_t sample = 0, firsthigh = 0, firstlow = 0;
+ uint16_t i = 0;
+
+ while (!BUTTON_PRESS() && !usb_poll_validate_length() && (i < bufsize) ) {
+ 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;
+ LED_D_OFF();
+
+ // find first peak
+ if ( !firsthigh ) {
+ if (sample < COTAG_ONE_THRESHOLD)
+ continue;
+ firsthigh = 1;
+ }
+ if ( !firstlow ){
+ if (sample > COTAG_ZERO_THRESHOLD )
+ continue;
+ firstlow = 1;
+ }
+
+ ++i;
+
+ if ( sample > COTAG_ONE_THRESHOLD)
+ dest[i] = 255;
+ else if ( sample < COTAG_ZERO_THRESHOLD)
+ dest[i] = 0;
+ else
+ dest[i] = dest[i-1];
+ }
+ }
+}
+
+uint32_t doCotagAcquisitionManchester() {
+
+ uint8_t *dest = BigBuf_get_addr();
+ uint16_t bufsize = BigBuf_max_traceLen();
+
+ if ( bufsize > COTAG_BITS )
+ bufsize = COTAG_BITS;
+
+ dest[0] = 0;
+ uint8_t sample = 0, firsthigh = 0, firstlow = 0;
+ uint16_t sample_counter = 0, period = 0;
+ uint8_t curr = 0, prev = 0;
+
+ while (!BUTTON_PRESS() && !usb_poll_validate_length() && (sample_counter < bufsize) ) {
+ 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;
+ LED_D_OFF();
+
+ // find first peak
+ if ( !firsthigh ) {
+ if (sample < COTAG_ONE_THRESHOLD)
+ continue;
+ firsthigh = 1;
+ }
+
+ if ( !firstlow ){
+ if (sample > COTAG_ZERO_THRESHOLD )
+ continue;
+ firstlow = 1;
+ }
+
+ // set sample 255, 0, or previous
+ if ( sample > COTAG_ONE_THRESHOLD){
+ prev = curr;
+ curr = 1;
+ }
+ else if ( sample < COTAG_ZERO_THRESHOLD) {
+ prev = curr;
+ curr = 0;
+ }
+ else {
+ curr = prev;
+ }
+
+ // full T1 periods,
+ if ( period > 0 ) {
+ --period;
+ continue;
+ }
+
+ dest[sample_counter] = curr;
+ ++sample_counter;
+ period = COTAG_T1;
+ }
+ }
+ return sample_counter;
+}