From bed24f53c265a793a0053580fe31dbcb2f6e7696 Mon Sep 17 00:00:00 2001
From: marshmellow42 <marshmellowrf@gmail.com>
Date: Wed, 5 Apr 2017 21:37:04 -0400
Subject: [PATCH] no longer need doT55x7Acquisition...

---
 armsrc/lfops.c      |  4 +--
 armsrc/lfsampling.c | 67 ---------------------------------------------
 armsrc/lfsampling.h |  6 ----
 3 files changed, 1 insertion(+), 76 deletions(-)

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index f70ea896..4a261b42 100644
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -1132,7 +1132,7 @@ void T55xxResetRead(void) {
 	TurnReadLFOn(READ_GAP);
 
 	// Acquisition
-	doT55x7Acquisition(BigBuf_max_traceLen());
+	DoPartialAcquisition(0, true, BigBuf_max_traceLen());
 
 	// Turn the field off
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
@@ -1266,8 +1266,6 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
 	// Now do the acquisition
 	DoPartialAcquisition(0, true, 12000);
 
-	//	doT55x7Acquisition(12000);
-
 	// Turn the field off
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
 	cmd_send(CMD_ACK,0,0,0,0,0);    
diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index aff31e9e..04c42116 100644
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -259,73 +259,6 @@ uint32_t SnoopLF()
 	return ret;
 }
 
-/**
-* acquisition of T55x7 LF signal. Similart to other LF, but adjusted with @marshmellows thresholds
-* the data is collected in BigBuf.
-**/
-void doT55x7Acquisition(size_t sample_size) {
-
-	#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();
-	uint16_t bufsize = BigBuf_max_traceLen();
-	
-	if ( bufsize > sample_size )
-		bufsize = sample_size;
-
-	uint16_t i = 0;
-	bool startFound = false;
-	bool highFound = false;
-	bool lowFound = false;
-	uint8_t curSample = 0;
-	uint8_t lastSample = 0;
-	uint16_t skipCnt = 0;
-	while(!BUTTON_PRESS() && !usb_poll_validate_length() && skipCnt<1000 && i<bufsize ) {
-		WDT_HIT();
-		if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
-			AT91C_BASE_SSC->SSC_THR = 0x43;
-			LED_D_ON();
-		}
-		if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
-			curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-			LED_D_OFF();
-
-			// skip until the first high sample above threshold
-			if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
-				//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 > T55xx_READ_LOWER_THRESHOLD+T55xx_READ_TOL){
-				// if just found start - recover last sample
-				if (!startFound) {
-					dest[i++] = lastSample;
-					startFound = true;
-				}
-				// collect samples
-				dest[i++] = curSample;
-			}
-		}
-	}
-}
-
 /**
 * acquisition of Cotag LF signal. Similart to other LF,  since the Cotag has such long datarate RF/384
 * and is Manchester?,  we directly gather the manchester data into bigbuff
diff --git a/armsrc/lfsampling.h b/armsrc/lfsampling.h
index cd774c15..9308215f 100644
--- a/armsrc/lfsampling.h
+++ b/armsrc/lfsampling.h
@@ -8,12 +8,6 @@
 void doCotagAcquisition(size_t sample_size);
 uint32_t doCotagAcquisitionManchester(void);
 
-/**
-* acquisition of T55x7 LF signal. Similart to other LF, but adjusted with @marshmellows thresholds
-* the data is collected in BigBuf.
-**/
-void doT55x7Acquisition(size_t sample_size);
-
 /**
 * Initializes the FPGA for reader-mode (field on), and acquires the samples.
 * @return number of bits sampled
-- 
2.39.5