- /* standard 1/0 bitstream */
- else {
- /* Then detect duration between 2 successive transitions */
- for (bitidx = 1; i < bytelength; i++) {
-
- if (data[i-1] != data[i]) {
- lc = i-lastval;
- lastval = i;
-
- // Error check: if bitidx becomes too large, we do not
- // have a Manchester encoded bitstream or the clock is really
- // wrong!
- if (bitidx > (bytelength*2/clock+8) ) {
- PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
- return 0;
- }
- // Then switch depending on lc length:
- // Tolerance is 1/4 of clock rate (arbitrary)
- if (abs(lc-clock/2) < tolerance) {
- // Short pulse : either "1" or "0"
- bitStream[bitidx++] = data[i-1];
- } else if (abs(lc-clock) < tolerance) {
- // Long pulse: either "11" or "00"
- bitStream[bitidx++] = data[i-1];
- bitStream[bitidx++] = data[i-1];
- } else {
- // Error
- warnings++;
- PrintAndLog("Warning: Manchester decode error for pulse width detection.");
- if (warnings > 10) {
- PrintAndLog("Error: too many detection errors, aborting.");
- return 0;
- }
+ return bitIndex;
+ }
+
+ int ManchesterConvertFrom1(const int * data, const size_t len, uint8_t * dataout, int clock, int startIndex){
+
+ int i,j, bitindex, lc, tolerance, warnings;
+ warnings = 0;
+ int upperlimit = len*2/clock+8;
+ i = startIndex;
+ j = 0;
+ tolerance = clock/4;
+ uint8_t decodedArr[len];
+
+ /* Then detect duration between 2 successive transitions */
+ for (bitindex = 1; i < len; i++) {
+
+ if (data[i-1] != data[i]) {
+ lc = i - startIndex;
+ startIndex = i;
+
+ // Error check: if bitindex becomes too large, we do not
+ // have a Manchester encoded bitstream or the clock is really wrong!
+ if (bitindex > upperlimit ) {
+ PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
+ return 0;
+ }
+ // Then switch depending on lc length:
+ // Tolerance is 1/4 of clock rate (arbitrary)
+ if (abs((lc-clock)/2) < tolerance) {
+ // Short pulse : either "1" or "0"
+ decodedArr[bitindex++] = data[i-1];
+ } else if (abs(lc-clock) < tolerance) {
+ // Long pulse: either "11" or "00"
+ decodedArr[bitindex++] = data[i-1];
+ decodedArr[bitindex++] = data[i-1];
+ } else {
+ ++warnings;
+ PrintAndLog("Warning: Manchester decode error for pulse width detection.");
+ if (warnings > 10) {
+ PrintAndLog("Error: too many detection errors, aborting.");
+ return 0;