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@marshmellows last LF changes.

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- wipe a t55x7 tag
- stable demods
-
This commit is contained in:
iceman1001 2015-11-20 16:56:43 +01:00
commit 6426f6ba86
9 changed files with 411 additions and 284 deletions
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24
armsrc/lfsampling.c
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@ -254,7 +254,8 @@ 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();
@ -266,8 +267,9 @@ 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() && !usb_poll_validate_length() && skipCnt<1000) {
WDT_HIT();
@ -281,19 +283,29 @@ 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