// split into two routines so we can avoid timing issues after sending commands //
void DoAcquisition125k(int trigger_threshold)
{
- uint8_t *dest = (uint8_t *)BigBuf;
- int n = sizeof(BigBuf);
+ uint8_t *dest = mifare_get_bigbufptr();
+ int n = 8000;
int i;
- memset(dest, 0, n);
+ memset(dest, 0x00, n);
i = 0;
for(;;) {
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
}
Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...",
dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]);
+
}
void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command)
void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
{
- uint8_t *dest = (uint8_t *)BigBuf;
+ uint8_t *dest = mifare_get_bigbufptr();
int m=0, n=0, i=0, idx=0, lastval=0;
int found=0;
uint32_t code=0, code2=0;
- //uint32_t hi2=0, hi=0, lo=0;
-
- FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
- FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
- 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);
-
- // Give it a bit of time for the resonant antenna to settle.
- SpinDelay(50);
-
- // Now set up the SSC to get the ADC samples that are now streaming at us.
- FpgaSetupSsc();
+ LFSetupFPGAForADC(0, true);
for(;;) {
WDT_HIT();
}
i = 0;
- m = sizeof(BigBuf);
+ m = 30000;
memset(dest,128,m);
for(;;) {
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
// we don't care about actual value, only if it's more or less than a
// threshold essentially we capture zero crossings for later analysis
- if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
- i++;
+ dest[i] = (dest[i] < 127) ? 0 : 1;
+ ++i;
if (ledcontrol)
LED_D_OFF();
- if(i >= m) {
+ if(i >= m)
break;
- }
}
}
for( i=0; idx<m; idx++) {
if (dest[idx-1]<dest[idx]) {
dest[i]=idx-lastval;
- if (dest[i] <= 8) {
- dest[i]=1;
- } else {
- dest[i]=0;
- }
-
+ dest[i] = (dest[i] <= 8) ? 1:0;
lastval=idx;
i++;
}
} else {
n=(n+1)/6; // fc/10 in sets of 6
}
- switch (n) { // stuff appropriate bits in buffer
- case 0:
- case 1: // one bit
- dest[i++]=dest[idx-1]^1;
- //Dbprintf("%d",dest[idx-1]);
- break;
- case 2: // two bits
- dest[i++]=dest[idx-1]^1;
- dest[i++]=dest[idx-1]^1;
- //Dbprintf("%d",dest[idx-1]);
- //Dbprintf("%d",dest[idx-1]);
- break;
- case 3: // 3 bit start of frame markers
- for(int j=0; j<3; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 4:
- for(int j=0; j<4; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 5:
- for(int j=0; j<5; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 6:
- for(int j=0; j<6; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 7:
- for(int j=0; j<7; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 8:
- for(int j=0; j<8; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 9:
- for(int j=0; j<9; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 10:
- for(int j=0; j<10; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 11:
- for(int j=0; j<11; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
- }
- break;
- case 12:
- for(int j=0; j<12; j++){
- dest[i++]=dest[idx-1]^1;
- // Dbprintf("%d",dest[idx-1]);
+
+ // stuff appropriate bits in buffer
+ if ( n==0 )
+ dest[i++]=dest[idx-1]^1;
+ else {
+ if ( n < 13){
+ for(int j=0; j<n; j++){
+ dest[i++]=dest[idx-1]^1;
}
- break;
- default: // this shouldn't happen, don't stuff any bits
- //Dbprintf("%d",dest[idx-1]);
- break;
+ }
}
+
n=0;
lastval=dest[idx];
}
}//end for
- /*for(int j=0; j<64;j+=8){
- Dbprintf("%d%d%d%d%d%d%d%d",dest[j],dest[j+1],dest[j+2],dest[j+3],dest[j+4],dest[j+5],dest[j+6],dest[j+7]);
- }
- Dbprintf("\n");*/
+
m=i;
WDT_HIT();
unknown <<=1;
if (dest[idx+j]) unknown |= 1;
}
- for(int j=36;j<45;j++){
+ for(int j=37;j<45;j++){
//Dbprintf("%d",dest[idx+j]);
number <<=1;
if (dest[idx+j]) number |= 1;
number <<=1;
if (dest[idx+j]) number |= 1;
}
+
for(int j=0; j<32; j++){
- code <<=1;
- if(dest[idx+j]) code |= 1;
+ code <<=1;
+ if(dest[idx+j]) code |= 1;
}
for(int j=32; j<64; j++){
- code2 <<=1;
- if(dest[idx+j]) code2 |= 1;
+ code2 <<=1;
+ if(dest[idx+j]) code2 |= 1;
}
Dbprintf("XSF(%02d)%02x:%d (%08x%08x)",version,unknown,number,code,code2);
}
// if we're only looking for one tag
if (findone){
- //*high = hi;
- //*low = lo;
LED_A_OFF();
return;
}
-
- //hi=0;
- //lo=0;
+
found=0;
}
-
}
}
WDT_HIT();
projects / proxmark3-svn / blobdiff