update changelog

+fix a comment typo
+ move clear bigbuf after fpgadownloadandgo...

armsrc/lfops.c

@@ -33,14 +33,15 @@ void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint
 
 	// use lf config settings
 	sample_config *sc = getSamplingConfig();
-	// clear read buffer
-	BigBuf_Clear_keep_EM();
 
-	/* Make sure the tag is reset */
+	// Make sure the tag is reset
 	FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	WaitMS(2500);
 
+	// clear read buffer (after fpga bitstream loaded...)
+	BigBuf_Clear_keep_EM();
+
 	// power on
 	LFSetupFPGAForADC(sc->divisor, 1);
 

armsrc/lfsampling.c

@@ -266,7 +266,7 @@ uint32_t SnoopLF()
 }
 
 /**
-* acquisition of Cotag LF signal. Similart to other LF,  since the Cotag has such long datarate RF/384
+* acquisition of Cotag LF signal. Similar to other LF,  since the Cotag has such long datarate RF/384
 * and is Manchester?,  we directly gather the manchester data into bigbuff
 **/
 #define COTAG_T1 384