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/****************************************************************************
 *   Copyright (C) 2009-2015 by Claas Anders "CaScAdE" Rathje               *
 *   admiralcascade@gmail.com                                               *
 *   Project-URL: http://www.mylifesucks.de/oss/c-osd/                      *
 *                                                                          *
 *   This program is free software; you can redistribute it and/or modify   *
 *   it under the terms of the GNU General Public License as published by   *
 *   the Free Software Foundation; either version 2 of the License.         *
 *                                                                          *
 *   This program is distributed in the hope that it will be useful,        *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
 *   GNU General Public License for more details.                           *
 *                                                                          *
 *   You should have received a copy of the GNU General Public License      *
 *   along with this program; if not, write to the                          *
 *   Free Software Foundation, Inc.,                                        *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.              *
 ****************************************************************************/

20150427-2145
        *adapted structs to reflect FC/NC software V2.10a/b
        
20141015-2300
        *adapted structs to reflect FC/NC software V2.08a
        *changed hanging to 2min wait in case of version missmatch
 
20140415-2130
        *adapted structs to reflect FC/NC software V2.06a
        *added version check for FC/NC software
                (OSD will hang at init in case version do not match)
        
20140317-1730
        *fixed battery-voltage >254 crash

20140313-2230
        *adapted structs to reflect FC/NC software V2.04a

20130824-1115
        *fixed FC-only mode

20130622-2030
        *adapted settings struct to FC software 0.90L
        
20130622-2030
        *adapted settings struct to FC software 0.90j

20130401-1216
        *fixed display of mAh from C-Strom
        *fixed ppm crash due do underflow

20130218-2030
        +Source option to set the Aggr.Horizon indicator bars on the same
         level as the horizon

20121127-2120
        +No FC communication define in config for usage with NC and no FC
        *memcpy stuff instead of inplace buffer to unlock the buffer faster
        +prepared the 3D Data stuff

20121105-1135
        *attemp to fix errors when building with GCC 4.7

20121102-1245
        *small init fix for display modes
        *small change in ppm handling
 
20120723-1900
        *expanded ampere wasted to 5digits in nc_mode_default
 
20120329-1324
        *corrected bug in stats which caused maximal current to be overwritten

20120328-1000
        *setting struct adapted to V0.88e
        @caused wrong setting-name display
        
20120114-2235
        *setting struct adapted to V0.86d
        @caused wrong setting-name display

20110921-1425
        +logo support
        @there is a logo in the new character definitions
        @to see it you will have to reflash characters
        @insert your own logo if you like to, see osd-logo.png as example
        @and use http://www.mylifesucks.de/tools/max7456/

20110825-1000
        *initial testing stuff for -45° rotated flights (X instead of +)
        *some minor code changes

20110605-1045
        *possible fix of the previous ugly RSSI hack

20110604-1615
        +really ugly (untested) hack to get ACT DSL RSSI information in FC-Only mode

20110523-1635
        *fixed statistics-accumulation in minimal-screen.

20110331-1805
        +added possibility to blank the display with SJ1 (SJ1 closed = no HUD)

20110331-1200
        *small adaption to NC 0.24b and FC 0.84a
        *added CF-indicator icon
        @To see the correct CF-indicator you will have to flash the characters!

20110307-1845
        *added debug output option for MAX7456 emulation
        *moved horizon one line higher when displaying GPS-Coordinates
        *fixed small glitch in menu

20110202-1323
        *added big speed indicator (credits to: uwerner)
        *added possibility to show GPS-Coordinates during flight
        *added more _brackets_
        @To see correct corner-chars when using scope, flash the character-set
         included in this release!

20101218-2030
        *added _brackets_ to mark a scope when using a second camera
         (might help to remember what the second camera is filming)
        @To see real corners, flash the new character-set included in this release!

20101116-2110
        *increased buffer so the new config struct really fits (fixes garbage after setting name)
        *fixed GPS-blink on startup
        *re-enable some ascii-char mappings (some people do have underscores in their setting-names)

20101115-2115
        *inserted missing new value in config-struct. should fix setting-name.

20101115-0800
        *updated structs and flags to fit FC 0.80a && NC 0.20a
        *sat-icon will blink when not enough sats are found (nc_mode_default)

20101008-0945
        *fixed EPi-Strom voltage-display when using FC-Ampere

20101007-1555
        *added passive option: OSD will NOT request data after bootup

20100908-2335
        *fixed height-offset causing different height values in OSD compared to MK-Tool when using baro-height (thx Neo360)

20100822-2300
        *removed debug-leftover in ppm.c (thx OktoMac)
        *made number display-routines more stable when big numbers occur

20100803-0355
        *removed constantly requests for the NC Uart in NC mode which
         caused problems when using OSD/MKTool at the same time

20100730-1345
        *added current setting display
        *updated structs for FC 0.80 and NC 0.20 (old version will still work, just cosmetics)
        *battery warn level now _can_ be taken from the FC-Settings
        *corrected some defines so FC stuff is only in FC Builds and NC stuff only in NC builds

20100701-1745
        *hopefully fixed altimeter-stats
        *some basic antenna tracking insertion for others to test

20100613-2255
        *corrected heigth-division-factor when using baro-height

20100531-1530
        *fixed bug in stats when max-distance > 999m

20100501-1130
        *distance to home now 4 digits for long distance flights
        *max height and speed shown again in stats
        *clear full screen before stats shown so the art-horizon does not bug us

20100419-0020
        *fixed bug causing PPM-based display on/off to fail
        *fixed display of AGRESSiVA-horizion during motor run

20100412-2125
        *added mph/ft (two new chars added, reflash characters if you need ft/mph)
        *AGRESSiVA-horizion now switchable via menu
        *reworked menu a bit
        *switched from -O2 to -Os because of the added stuff

20100403-0115
        *RC-RSSI now shown if available (RC_Quality is still fallback, still needs FC patch)
        +AGRESSiVA-horizion to main trunk (NEW_ARTHORIZON 1 to test, needs new chars)
        +chars needed for above mod to chars.mcm and chars.c

20100218-2330
        *hopefully fixed the laggy osd data problem
        -send_data_mk has been striked out to save space
        @nc-mode should be small enough for bootloader again ( Program:  14986 bytes (91.5% Full) )

20100216-1430
        *some menu stuff
        *stats in nc_default do not disturb the bigvario anymore
        *reduced code size from 16088 bytes (98.2% Full) 15436 bytes (94.2% Full)

20100214-1700
        +mah wasted per flight (still counts up after landing, but space gets tight)
        *init phase from 2000ms to 3000ms
        *init only takes place after first "valid" UBat is received (<4V should case the Mega to reset anyways)

20100212-2310
        *adapted MK-datastructs to NC 0.18c
        *added choice for current display measured by FC

20091109-1100
        +fc-only mode by Josef "jopl" Plasil (MK3Mag on FC and no NC)
        *usart1 routine to filter out unwanted datasets (also big thanks to jopl)

20091102-2205
        +nc/fc software version display in bootup
        *changed checkbytes because of previously removed EEPROM data

20091030-2222
        *synced NaviStruct to NC Code v0.17e
        (since nothing of the new stuff is used right now, older NC version will still work)

20090714-2100
        *fixed the flags (hopefully) for C-Strom and stuff

20090706-2000
        *hopefully fixed the new 10th number showing functions
        +support for GPS height instead of Baro

20090703-0005
        *write-number-functions changed, using itoa now, saves space, should be faster
        *inline added for basic max7456-spi_send because saves procedure call (^= time)

20090627-1415
        *ALL characters now in Progmem, from now on there will be only ONE char-file!

20090612-2100
        *spi transfer now struct driven (needs C-Strom 20090612-2100 now!!!)
        *lesser spi update rate (caused problems on some strom-slaves)
        *voltage gets transfered via spi as well
        *menu to switch display of 2nd voltage measured by C-Strom on and off

20090604-1350
        *bugfix for stats

20090604-1330
        *possible to choose between different osd-layouts (via menu)

20090604-0700
        +(shaddi)osd_ncmode_minimal for less symbols during FPV

20090601-2233
        *(woggle) changed timer init an interupt to be more precise
        *(woggle) remove all warning during compile
        *(woggle) simplify draw_big_variometer
        *(woggle) put compass rose to PROGMEM
        *(woggle) put directions array to PROGMEM

20090525-2305
        +HUD on/off via RC (connect to PPM, according to manual) testing stuff

20090523-1150
        +pal/ntsc changable in menu (applied immedeately!)

20090519-2245
        *mah corrected
        +config gets saved now (menu item!)
        *source moved a bit

20090519-0115
        +mah currently wasted
        *some small changes

20090517-2345
        *modded the real alpha stuff i have been talking about below

20090516-2345
        +some really testing stuff 'bout current measurement, more to come

20090513-2350
        *cellnumber autoconfig modified, offset set to 1,5V
        *copy paste nick/roll error fixed
        *clean after build in dist.sh
        +a little shellscript to auto-build the files (testing)
        *osd-layouts in seperate files so including own layouts should get easier
        +build date is displayed during init to know which version you are runing

20090513-1040
        *some code movement
        +artificial horizon for FC-ONLY mode

20090512-2100
        +some FCONLY basics (set FCONLY to 1 in main.h to use it)

20090511-2345
        *battery voltages now calculated according to CELL_VOLT_MIN CELL_VOLT_MAX and CELL_NUM
        *CELL_NUM -1 causes a rough auto detection of cell number
        -UBAT_WRN and UBAT_MAX are now deprecated

20090427-2315
        +write_gps_pos(...) (needs to be tested)
        +gps position is shown in stats screen for testing purpose

20090427-2131
        *stats are only collected while engines running (shaddi)

20090427-2102
        *fixed maximum distance in stats (shaddi)

20090427-2050
        *clear() now faster
        *fixed calculation of max speed in stats (shaddi)
        *littel typo in artificial horizon (thx joko)
        *stats are only shown AFTER flight (more specific, after motors had been on at least once)
        +indication icon for serial link (requires new character 198)
        +indication icon for manual controll (stick > stick threshold)
        (Character set 192 needs to be reflashed since new icon is in it)

20090420-0205
        *reset-bug fixed
        *moved code a bit

20090419-2145
        *reset-bug workaround in usart1.c: usart1_DisableTXD and usart1_EnableTXD

20090419-1900
        *fixed bug in heading-fine conv for bearing to home

20090419-1245
        *compass characters bigger
        *battery position
        +voltage-symbol to battery-voltage
        (Character Set 208 needs to be reflashed since compass chars are in it)

20090418-2015
        *fixed bug in Character Set 128 (reflash it if you already flashed it!)
        +another set of vario chars
        *changed vario to use new characters
        *moved vario/home-bearing positions
        *big vario now enabled via menu or BIGVARIO
        (Character Set 112 needs to be flashed)

20090418-1235
        +big vario for testing purpose
        (Character Set 192 needs to be flashed)

20090418-0100
        *variometer uses more steps (9 instead of 5)
        *home-arrow is now home-clock using more steps (22,5� resolution)
        +visual battery-gauge according to difference between UBAT_WRN and UBAT_MAX

20090417-1115
        *changed calculation of km/h (thx wowie)
        *added JochenK_(joko)'s characters
        (Character-Sets 128, 136, 144, 152, 160, 168, 176 and 184 need to be flashed!)

20090408-1245 (shaddi)
        *fixed distance towards home

20090408-0035
        *rewrote number->display functions
        *fixed height bug (uint vs int)

20090407-2100
        +added request of OSD data, disrequest of debug data and uptime reset to menu
        -removed the uptime-reset binding from S2
        +pgm space for some strings to save _normal_ data space
        *some code movement

20090406-0130
        *MK-Datastruct updated to work with NaviCtrl 0.15c firmware
        *changed flags from NO* to invers versions
        *enhanced the menu a bit
        -artificial horizon at bootup, the menu is cooler imho

20090405-0207
        +NOOSD as requested
        *height now corrected (thx lephisto) and displayed as .x up to 10m

20090402-0106
        + disabling the txd pin while not using it so it won't interfere with KopterTool usage (thx joko)
        + if no data has been received for over 2sec we re-request it
        * tried source organisation a bit

20090401-1741 (shaddi)
        + More precise Veriometer. Uses more more characters to show the speed of the movement
            (Character-Set 232 needs to be flashed!)

20090331-1549
        + simple config menu during runtime, press S1 to jump in, S2 to cyle and S1 to accept choice
        - S1 no longer requests the NC data

20090331-1305
        + added more statistics
        * corrected S1/S2 mapping (d'oh)
        + started simple mode controll, press S2 during bootup toggles artificial horizon

20090329-1452
        * fixed bearing to home
        + added flight stats (shown while engines off)
        + sat icon should indicate PH/CH/Free now
        + you need to flash characters 224-231 if you were using previous versions

20090327-2140
        * fixed km/h (was cm/s)
        * fixed height m (was dm)
        * modified incoming data speed to 100ms (was 200ms)

20090326-2031
        + first binary release