lf t55xx and some lf demod fixes/adjustments

[proxmark3-svn] / armsrc / lfsampling.c

diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 115d4b18ffaba74ef9c5da113cabb5444679375b..7c5412820b20ce065637c6af6d253345dba4ba5c 100644 (file)
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -268,7 +268,7 @@ void doT55x7Acquisition(size_t sample_size) {
        bool startFound = false;
        bool highFound = false;
        uint8_t curSample = 0;
-       uint8_t firstSample = 0;
+       uint8_t lastSample = 0;
        uint16_t skipCnt = 0;
        while(!BUTTON_PRESS() && skipCnt<1000) {
                WDT_HIT();
@@ -282,19 +282,18 @@ 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 first high samples begin to change
-                       if (startFound || curSample < firstSample-T55xx_READ_TOL){
+                       if (startFound || curSample < T55xx_READ_UPPER_THRESHOLD-T55xx_READ_TOL){
                                // if just found start - recover last sample
                                if (!startFound) {
-                                       dest[i++] = firstSample;
+                                       dest[i++] = lastSample;
                                        startFound = true;
                                }
                                // collect samples