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					Canon A590 IS Mods:
- The following instructions will walk you through the
  steps needed to change the firmware on this camera to
  take pictures automatically during the flight




                                                     1   1
                             ACCESS
Active Community College Experiences for
                       Students in Space




  Camera
 Firmware
Modifications
                                           2
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Canon A590 IS Mods:
- The following instructions will walk you through the
  steps needed to change the firmware on this camera to
  take pictures automatically during the flight




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Canon A590 IS Mods:

- The CHDK code was originally written by Rick von
  Glahn from Edge of Space Sciences (EOSS)

- These steps are performed with the camera
  modified to turn on and off with a external switch
  or AVR microcontroller

- The steps to modify the hardware of the camera are
  contained in a different presentation


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Canon A590 IS Mods:

- This mod uses CHDK to add autonomy to a digital
  camera without the use of a timing circuit or further
  modifications to the camera

- CHDK is firmware enhancement

- CHDK = Canon Hack Development Kit

- It only works with Canon digital cameras

- Please see the following website for much more
  information http://chdk.wikia.com/wiki/CHDK        55
Canon A590 IS Mods:

- Take your camera out of the box




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Canon A590 IS Mods:

- Insert the
  batteries




                      7   7
Canon A590 IS Mods:

- Turn on camera by touching two wires together




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Canon A590 IS Mods:

- Set the date
  and time

- Power off the
  camera by
  touching the
  two wires
  together
  again


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Canon A590 IS Mods:

- Insert SD card and close battery cover
  (not all SD cards support this mod)




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Canon A590 IS Mods:

- Set Camera to “AV” mode
- “AV” = Aperture Priority




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Canon A590 IS Mods:

- Turn on camera by touching two wires together




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Canon A590 IS Mods:

- Make sure the switch is on “play”




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Canon A590 IS Mods:

- Press the “MENU” button and format the card – Use
  the “Low Level Format” setting
                     1.                         2.




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                                                14
Canon A590 IS Mods:

- Press the “MENU” button and format the card – Use
  the “Low Level Format” setting

                     3.                          4.




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                                                15
Canon A590 IS Mods:

- Press the “MENU” button and format the card – Use
  the “Low Level Format” setting

                     5.




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Canon A590 IS Mods:

- Power off camera and remove the SD Card




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Canon A590 IS Mods:

- Connect the SD card to your computer

                     1.                   2.




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 Canon A590 IS Mods:
- The files we are
  going to copy to
  the SD card
  contain a script
  (macro) that
  will take
  pictures
  throughout the
  flight after an
  initial boot up.

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Canon A590 IS Mods:
- Open the “CU_SGC_Interval.bas” file with text editor


                                                   1.




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                                                   20
Canon A590 IS Mods:
- Open the “CU_SGC_Interval.bas” file with text editor


                2.                                 3.




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                                                   21
Canon A590 IS Mods:
- Open the “CU_SGC_Interval.bas” file with text editor




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                                                   22
Canon A590 IS Mods:
- Open the “CU_SGC_Interval.bas” file with text editor




                                                   23
                                                   23
Canon A590 IS Mods:

- Copy the
  CHDK
  folder
  structure
  and files to
  the SD card




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Canon A590 IS Mods:

- Make sure the switch is on “play”




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Canon A590 IS Mods:

- Insert SD card and power the camera on.




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Canon A590 IS Mods:

- Press the “MENU” button and press the left on the
  circle button until the “play” symbol is highlighted




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Canon A590 IS Mods:

- Press up button and highlight “Firm Update”




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Canon A590 IS Mods:

- Select “OK” and press “SET”




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Canon A590 IS Mods:

- Camera should now be running the CHDK firmware.




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Canon A590 IS Mods:

- Press the printer button to access CHDK firmware




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Canon A590 IS Mods:

- <ALT> should be in the bottom of the screen




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Canon A590 IS Mods:

- With <ALT> on the screen, press the MENU button




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Canon A590 IS Mods:

- Scroll down to “Miscellaneous stuff”




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Canon A590 IS Mods:

- Scroll down to “Make card bootable” and press
  “FUNC. SET” – Nothing will happen.




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Canon A590 IS Mods:

- Scroll down to “Back” and press “FUNC. SET”




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Canon A590 IS Mods:

- Select “Scripting parameters”- press “FUNC. SET”




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Canon A590 IS Mods:

- Select “Load script from file”- press “FUNC. SET”




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Canon A590 IS Mods:

- Select “CU_SGC~1.BAS”- press “FUNC. SET”




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Canon A590 IS Mods:

- Should now see CU Intervals at middle of screen




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Canon A590 IS Mods:

- Select and turn on “Script Autostart” You must press
  “FUNC. SET” for settings to save




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Canon A590 IS Mods:

- Scroll down and select “Back”




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Canon A590 IS Mods:

- Press “MENU” and power off camera




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Canon A590 IS Mods:

- Press “MENU” and power off camera




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Canon A590 IS Mods:

- Remove the SD card and slide switch to “LOCKED”




Even though the card is in the “LOCKED” position it
                                                    45
 will be able to be written to via the CHDK firmware. 45
Canon A590 IS Mods:

- Insert locked SD card and make sure the camera is in
  “RECORD” mode




                                                  46
                                                  46
Canon A590 IS Mods:
- Power on the
  camera

- “CU Intervals”
 and the “<ALT>”
 should be visible

- Script should be
  running


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Canon A590 IS Mods:
- It will go through a series of camera setting changes
  which will take about 60 seconds

- Then the camera will begin to take pictures every 10
  seconds for the first 30 minutes (~180 pictures)

- Then the camera will begin to take pictures every 30
  seconds for 86 minutes (~172 pictures)

- Then the camera will begin to take pictures every 10
  seconds for 15 minutes (~90 pictures)
                                                    48
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- Total of ~442 pictures (2GB can hold ~ 566 pictures)
Canon A590 IS Mods:
- You can turn the camera off anytime.

- If you wish to stop the script during execution just
  press the shutter release button and that will
  interrupt the execution of the script

- Press the print button to gain control of the camera
  without having to remove the card




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                                                     49
Canon A590 IS Mods:

- After the pushing the shutter, you must push the
  print button to have normal camera control




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Canon A590 IS Mods:
- This is handy if you want to review photos, or do
  something else without the script running.

- To restart the script push the print button again
  followed by the print button




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Canon A590 IS Mods:

- Remember, any setting you might make to the
  camera will be restored to factory default settings
  next time the script runs as that is the first action the
  script takes

- Once you interrupt a script it must be re-run from
  the beginning you can not PAUSE a script and
  RESUME it



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Canon A590 IS Mods:

- You can modify your code without reloading the
  firmware

- You could modify the timing to get more or less
  pictures but you should test before flight.




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Canon A590 IS Mods:

- Power off camera

- Remove SD Card

- Unlock SD Card

- Open CHDK/Scripts/CU_SGC_Interval.bas

- Scroll down to end of code and change b to 5000

- Save
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Canon A590 IS Mods:

- Remove SD card and lock

- Insert SD card into the camera and power on

- You can also “rem” out pieces of the set up or other
  functions but test first

- You can’t speed things up too much however. Be
 careful.


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Canon A590 IS Mods:

http://chdk.wikia.com/wiki/CHDK




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                             ACCESS
Active Community College Experiences for
                       Students in Space




     Questions

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