+// prepare a waveform pattern in the buffer based on the ID given then
+// simulate a FSK tag until the button is pressed
+// arg1 contains fcHigh and fcLow, arg2 contains invert and clock
+void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
+{
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+
+ // free eventually allocated BigBuf memory
+ BigBuf_free(); BigBuf_Clear_ext(false);
+ clear_trace();
+ set_tracing(FALSE);
+
+ int ledcontrol = 1, n = 0, i = 0;
+ uint8_t fcHigh = arg1 >> 8;
+ uint8_t fcLow = arg1 & 0xFF;
+ uint16_t modCnt = 0;
+ uint8_t clk = arg2 & 0xFF;
+ uint8_t invert = (arg2 >> 8) & 1;
+
+ for (i=0; i<size; i++){
+
+ if (BitStream[i] == invert)
+ fcAll(fcLow, &n, clk, &modCnt);
+ else
+ fcAll(fcHigh, &n, clk, &modCnt);
+ }
+ WDT_HIT();
+
+ Dbprintf("Simulating with fcHigh: %d, fcLow: %d, clk: %d, invert: %d, n: %d", fcHigh, fcLow, clk, invert, n);
+
+ if (ledcontrol) LED_A_ON();
+ SimulateTagLowFrequency(n, 0, ledcontrol);
+ if (ledcontrol) LED_A_OFF();
+}
+
+// compose ask waveform for one bit(ASK)
+static void askSimBit(uint8_t c, int *n, uint8_t clock, uint8_t manchester)
+{
+ uint8_t *dest = BigBuf_get_addr();
+ uint8_t halfClk = clock/2;
+ // c = current bit 1 or 0
+ if (manchester==1){
+ memset(dest+(*n), c, halfClk);
+ memset(dest+(*n) + halfClk, c^1, halfClk);
+ } else {
+ memset(dest+(*n), c, clock);
+ }
+ *n += clock;
+}
+
+static void biphaseSimBit(uint8_t c, int *n, uint8_t clock, uint8_t *phase)
+{
+ uint8_t *dest = BigBuf_get_addr();
+ uint8_t halfClk = clock/2;
+ if (c){
+ memset(dest+(*n), c ^ 1 ^ *phase, halfClk);
+ memset(dest+(*n) + halfClk, c ^ *phase, halfClk);
+ } else {
+ memset(dest+(*n), c ^ *phase, clock);
+ *phase ^= 1;
+ }
+ *n += clock;
+}
+
+static void stAskSimBit(int *n, uint8_t clock) {
+ uint8_t *dest = BigBuf_get_addr();
+ uint8_t halfClk = clock/2;
+ //ST = .5 high .5 low 1.5 high .5 low 1 high
+ memset(dest+(*n), 1, halfClk);
+ memset(dest+(*n) + halfClk, 0, halfClk);
+ memset(dest+(*n) + clock, 1, clock + halfClk);
+ memset(dest+(*n) + clock*2 + halfClk, 0, halfClk);
+ memset(dest+(*n) + clock*3, 1, clock);
+ *n += clock*4;
+}
+
+// args clock, ask/man or askraw, invert, transmission separator
+void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
+{
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+ set_tracing(FALSE);
+
+ int ledcontrol = 1, n = 0, i = 0;
+ uint8_t clk = (arg1 >> 8) & 0xFF;
+ uint8_t encoding = arg1 & 0xFF;
+ uint8_t separator = arg2 & 1;
+ uint8_t invert = (arg2 >> 8) & 1;
+
+ if (encoding == 2){ //biphase
+ uint8_t phase = 0;
+ for (i=0; i<size; i++){
+ biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
+ }
+ if (phase == 1) { //run a second set inverted to keep phase in check
+ for (i=0; i<size; i++){
+ biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
+ }
+ }
+ } else { // ask/manchester || ask/raw
+ for (i=0; i<size; i++){
+ askSimBit(BitStream[i]^invert, &n, clk, encoding);
+ }
+ if (encoding==0 && BitStream[0]==BitStream[size-1]){ //run a second set inverted (for biphase phase)
+ for (i=0; i<size; i++){
+ askSimBit(BitStream[i]^invert^1, &n, clk, encoding);
+ }
+ }
+ }
+ if (separator==1 && encoding == 1)
+ stAskSimBit(&n, clk);
+ else if (separator==1)
+ Dbprintf("sorry but separator option not yet available");
+
+ WDT_HIT();
+
+ Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
+
+ if (ledcontrol) LED_A_ON();
projects / proxmark3-svn / blobdiff