RPi Tasks - Revision history

Mahjongg: /* OTG Device mode */

2012-08-25T12:13:02Z

‎OTG Device mode

2012-08-23T10:12:09Z

‎An Even Simpler Backup/Restore Idea

2012-08-23T10:11:15Z

‎mkcard.sh

2012-08-06T21:56:52Z

added references, template, category

2012-04-19T11:29:31Z

‎OTG Device mode

2012-04-19T11:21:22Z

‎OTG Device mode

2012-04-11T19:15:43Z

‎Multi Code: suggest using existing applications

2012-03-31T10:38:10Z

‎OTG Device mode

2012-03-15T13:56:16Z

‎Automatic, no delay solution

2012-03-10T14:34:42Z

‎About: Minor spelling correction

@@ Line 34: / Line 34: @@
 '''The detail''': Once both devices are booted, the recovery image runs completely from RAM.  The SDcard can be ejected and the damaged or wiped SDcard inserted.  The SDcard of the working machine can then be cloned.
-'''The task''': The device won’t support device mode out of the box, though we’re using a Synopsys OTG core so the hardware is there and the firmware is open, so it might be possible. I suspect if you forced 5V onto the USB power rail it would boot. (Note: Maybe not: There might be a 140mA Polyfuse in there).
+'''The task''': The device won’t support device mode out of the box, though we’re using a Synopsys OTG core so the hardware is there and the firmware is open, so it might be possible. I suspect if you forced 5V onto the USB power rail it would boot. (Note: Maybe not: There might be a 140mA Polyfuse in there, if the PI is produced before August 25, 2012).
 A device driver would need to be written and a recovery image created.  A command line tool set will need to be provided to deliver the functionality described above.

@@ Line 79: / Line 79: @@
 This could be treated as a mundane "Backup Your SDcard" procedure, rather than as a scary last resort.
-https://github.com/johnlane/rpi-utils/blob/master/disk/rpi_mkimage==mkcard.sh==
+==mkcard.sh==
 '''The idea''': A script which partitions and formats the SDcard ready for software.

@@ Line 79: / Line 79: @@
 This could be treated as a mundane "Backup Your SDcard" procedure, rather than as a scary last resort.
-==mkcard.sh==
+https://github.com/johnlane/rpi-utils/blob/master/disk/rpi_mkimage==mkcard.sh==
 '''The idea''': A script which partitions and formats the SDcard ready for software.
@@ Line 91: / Line 91: @@
 Some of my past projects use such a script to generate a sdcard. I modified it, so it does only the requested things ( removed the part that installs a MBR and copies files to the card ). It can be found here http://pastebin.com/u9Qpm5n0. ATM the partitions are ~80 MB for ext, rest of the card for FAT32 (can be changed on request).
 ==delay_copy.sh==

← Older revision		Revision as of 11:29, 19 April 2012
Line 17:		Line 17:

	It is intended that these tasks will be implemented by the Raspberry Pi community.		It is intended that these tasks will be implemented by the Raspberry Pi community.
		+
		+
		+	==OTG device mode==
		+
		+	Inspired by the device mode idea below: Allow the Raspberry Pi to work as an USB device. Sharing the SD card as a storage device is one option. But becoming an USB-display is another.
		+
		+	Decisions to make: Run Linux on the "device mode" Raspberry Pi or not?
		+
		+	Difficulties: the Raspberry Pi has a "device mode" connector, but the data pins are unconnected. Solutions: Use the USB connector on a Model A with a custom cable/converter, or find pins on the board to attach patchwires to.
		+

	==OTG Device mode==		==OTG Device mode==

@@ Line 149: / Line 149: @@
 '''The idea''': One R_pi will be connected to another and both can work on the same code.py. So that way say a teacher wanted to help a student with code without taking over. They can just plug there pi in to the students and go through checking for mistakes ect.
-'''The Conection''': Conection will probably be via Ethernet using an ad-hoc. Network.
+'''The Conection''': Conection will probably be via Ethernet using an ''ad hoc'' Network.
 '''Whats needed?''': The program needs to open .py files and edit them. Next it needs to make a shered file that is updated every time a character changes.
 A different program (or same does not matter) should then connect to this file and update it in the same way. Every 10 seconds both pi's reload the shared file, thus have the same code. If the changes contradict each other then the host pi will override the connected pi.
 '''Further evolutions''': once/if the initial goals are acheved then further developments to the project would include making the systom compleatly live so there in no 10 second delay to each update. And make it posibal to connect the pi's via the Internet.

← Older revision		Revision as of 10:38, 31 March 2012
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	Once the kernel has that "take over the device" mode, I'm sure some neato to-the-metal applications will also spring up ;-)		Once the kernel has that "take over the device" mode, I'm sure some neato to-the-metal applications will also spring up ;-)
		+
		+	===An Even Simpler Backup/Restore Idea===
		+	A much easier and less error-prone recovery method would be to clone the current system's SDcard to another card in a USB writer. The software required could be a simple shell script wrapper around dd, maybe using dialog for prompts and warnings and confirmations.
		+
		+	USB SDcard Reader/Writers are cheap - even Amazon has them for $1.75, retail price for single units, and you can probably find them even cheaper if you google for "USB SDcard writer". Some writers are as small as USB thumb-drives.
		+
		+	They could offered as an optional purchase along with a Raspberry Pi, or schools could be given one or two with larger orders, along with instructions on how to use them to restore a student's damaged SDcard.
		+
		+	This could be treated as a mundane "Backup Your SDcard" procedure, rather than as a scary last resort.

	==mkcard.sh==		==mkcard.sh==

@@ Line 92: / Line 92: @@
+{
-* "rysnc -ac /directory/to/copy/each/time %d" might be better suited to transfer the files to the card.
+* "rsync -ac /directory/to/copy/each/time %d" might be better suited to transfer the files to the card.
 * "sync" to flush the buffers afterwards couldn't hurt either
+}

@@ Line 14: / Line 14: @@
 The Raspberry Pi Foundation is a UK registered charity (Registration Number 1129409) which exists to promote the study of computer science and related topics, especially at school level, and to put the fun back into learning computing. We expect this computer to have many other applications both in the developed and the developing world.
-'''Please note that the Raspberry Pi has only just been released - this page is a community work in progress in preparation for when people get there devises.  Please also note that we will be setting up a repository for uploading contributions, but this isn't ready yet so please simply use [http://pastebin.com http://pastebin.com] or [http://dropbox.com http://dropbox.com] and provide a link from this page, until we have something set up'''
+'''Please note that the Raspberry Pi has only just been released - this page is a community work in progress in preparation for when people get their devices.  Please also note that we will be setting up a repository for uploading contributions, but this isn't ready yet so please simply use [http://pastebin.com http://pastebin.com] or [http://dropbox.com http://dropbox.com] and provide a link from this page, until we have something set up'''
 It is intended that these tasks will be implemented by the Raspberry Pi community.
 ==OTG Device mode==