[PATCH v2 11/11] Documentation: add real Canon A1100 camera barebox mini-howto

[Antony Pavlov <antonynpavlov@gmail.com>]

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
 Documentation/boards/digic.rst | 53 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/Documentation/boards/digic.rst b/Documentation/boards/digic.rst
index e2c49b6..50a6ee8 100644
--- a/Documentation/boards/digic.rst
+++ b/Documentation/boards/digic.rst
@@ -14,3 +14,56 @@ Usage::
   $ qemu-system-arm -M canon-a1100 \
       -nographic -monitor null -serial stdio \
       -bios barebox.canon-a1100.bin
+
+
+Running barebox on real camera
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Install CHDK firmware on SD-card (see http://chdk.wikia.com/wiki/CHDK_For_Newbies_-_How_To_Install and http://chdk.wikia.com/wiki/A1100).
+
+Make your SD-card bootable (see http://chdk.wikia.com/wiki/Prepare_your_SD_card).
+
+Build barebox: you will get the ``DISKBOOT-A1100.BIN`` file.
+
+Overwrite CHDK boot file on your SD-card (``DISKBOOT.BIN``)
+with the barebox ``DISKBOOT-A1100.BIN`` file.
+
+Lock your SD-card (use small switch on the card).
+**It is obligatory!**
+
+Insert the SD-card into your camera.
+Close your camera's SD-card slot.
+
+
+Turn your camera on (press the 'Playback mode' button).
+Barebox will run; it will use the serial port for console
+(see http://chdk.wikia.com/wiki/UART for details on A1100
+UART connection).
+
+
+LED script
+~~~~~~~~~~
+
+If you have no oppotunity to use camera's serial port then
+you can use leds for checking barebox.
+
+Enable ``CONFIG_DEFAULT_ENVIRONMENT`` in the ``.config``
+and set ``CONFIG_DEFAULT_ENVIRONMENT_PATH="arch/arm/boards/canon-a1100/env"``.
+
+Use this ``arch/arm/boards/canon-600d/env/bin/init``::
+
+  #!/bin/sh
+  
+  # use "direct print" led (blue)
+  LED=0
+  
+  DELAY=300
+  
+  for i in 1 2 3; do
+         led $LED 1
+         msleep $DELAY
+         led $LED 0
+         msleep $DELAY
+  done
+
+After barebox start the camera's blue led will blink.
-- 
2.0.1


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