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/****************************************************************************
 *   Copyright (C) 2009-2010 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.              *
 ****************************************************************************/

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