Update CHANGELOG.md

Change Log Update

CHANGELOG.md

@@ -4,33 +4,11 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
 
 ## [unreleased][unreleased]
 
-## T55xx Downlink Protocol - 22 Jun 2019
-
-# armsrc/lfops
-
+## T55xx Downlink Protocol
 ### Added
-- Added typedef T55xx_Timing to hold downlink timings.
-- Added Timing Records for long leading reference (llr), Leading 0 and 1 of 4
-- Added some constant defines for code readability
-- Added function T55xx_SetBits to build a bit stream for writing to T55xx
-- Added function T55xx_SendCMD to build the bit stream and send to T55xx
-
-### Changed
-- Converted Timing for default/fixed bit to T55xx_Timing
-- Updated T55xxWriteBit (and calls) to support all downlink protocols
-- Updated T55xxWriteBlock to call T55xx_SendCMD (removed local bit writes)
-- Updated T55xxReadBlock to call T55xx_SendCMD (removed local bit writes)
-
-# client/cmdlft55xx
-
-### Added
-- Added function T55xx_Print_DownlinkMode to print downlink mode information when uesd
-
-### Changes
-- Added downlink mode options r <mode> [ 0 (or missing) default/fixed bit, 1 long leading, leading 0 and 1 of 4 ]
-- Added r 4 option to bruteforce to try all downlink modes (0,1,2 and 3)
-- Updated help messages for each support functions t55xx_read, t55xx_write, t55_detect, t55xx_bruteforce
-
+- Added downlink reference mode option r <mode> [ 0 - (or missing) default/fixed bit, 1 - long leading, 2 - leading 0 and 3 - 1 of 4 ]
+- Added special option r 4 to bruteforce, to try all downlink modes (0,1,2 and 3) for each password
+- Support added to lf t55xx detect, read, write, bruteforce 
 
 ### Changed
 - Changed hf mfp security. Now it works in all the modes. (drHatson)