Electrum Xenomai Notes - Revision history

Support: /* Real-Time (Xenomai) Debian Linux from Scratch for Electrum100 */

2011-08-03T14:51:47Z

Real-Time (Xenomai) Debian Linux from Scratch for Electrum100

← Older revision		Revision as of 14:51, 3 August 2011
Line 5:		Line 5:

	http://stoian.us/misc/index.php?post=real-time-xenomai-debian-squeeze-installation-for-electrum-100-1		http://stoian.us/misc/index.php?post=real-time-xenomai-debian-squeeze-installation-for-electrum-100-1
		+

	This tutorial is split into four sections: compilation of a kernel for Electrum100, installation of Debian Squeeze root filesystem and Xenomai user libraries onto the SBC, and a short Xenomai development example (user-land).		This tutorial is split into four sections: compilation of a kernel for Electrum100, installation of Debian Squeeze root filesystem and Xenomai user libraries onto the SBC, and a short Xenomai development example (user-land).

Support: /* Real-Time (Xenomai) Debian Linux from Scratch for Electrum100 */

2011-08-03T14:51:32Z

Real-Time (Xenomai) Debian Linux from Scratch for Electrum100

← Older revision		Revision as of 14:51, 3 August 2011
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	Contributed by: Razvan-Ionut Stoian - [mailto:razvan@stoian.us razvan@stoian.us]		Contributed by: Razvan-Ionut Stoian - [mailto:razvan@stoian.us razvan@stoian.us]

		+	For updates and additional details on this application note please visit Razvan Stoian's web site at:
		+
		+	http://stoian.us/misc/index.php?post=real-time-xenomai-debian-squeeze-installation-for-electrum-100-1

	This tutorial is split into four sections: compilation of a kernel for Electrum100, installation of Debian Squeeze root filesystem and Xenomai user libraries onto the SBC, and a short Xenomai development example (user-land).		This tutorial is split into four sections: compilation of a kernel for Electrum100, installation of Debian Squeeze root filesystem and Xenomai user libraries onto the SBC, and a short Xenomai development example (user-land).

Support at 18:20, 20 July 2011

2011-07-20T18:20:05Z

← Older revision		Revision as of 18:20, 20 July 2011
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	Supporting files:		Supporting files:

-	: [1] Electrum100 (200) patch for vanilla 2.6.35.9 and kernel configuration file	+	: 1. [http://www.stoian.us/misc/patch-2.6.35.9.tar.bz2 Electrum100 (200) patch for vanilla 2.6.35.9 and kernel configuration file]
-	: [2] sample code - real-time GPIO toggling (Xenomai)	+	: 2. [http://www.stoian.us/misc/gpio_xenomai.tar.bz2 sample code - real-time GPIO toggling (Xenomai)]

	Sources:		Sources:

Support: /* Real-Time (Xenomai) Debian Linux from Scratch for Electrum100 */

2011-07-20T18:18:27Z

Real-Time (Xenomai) Debian Linux from Scratch for Electrum100

← Older revision		Revision as of 18:18, 20 July 2011
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	More on filesystem corruption on embedded systems [http://www.embeddedarm.com/about/resource.php?item=459 here].		More on filesystem corruption on embedded systems [http://www.embeddedarm.com/about/resource.php?item=459 here].

-	The command line passed to the kernel by U-Boot must contain the lpj parameter. Without it, the BogoMIPS calculation would add to the overall boot time.	+	The command line passed to the kernel by U-Boot must contain the ''lpj'' parameter. Without it, the BogoMIPS calculation would add to the overall boot time.

	U-Boot> setenv bootcmd 'mmcinfo; ext2load mmc 0:1 0x20100000 uImage; bootm 0x20100000'		U-Boot> setenv bootcmd 'mmcinfo; ext2load mmc 0:1 0x20100000 uImage; bootm 0x20100000'

Support: /* Real-Time (Xenomai) Debian Linux from Scratch for Electrum100 */

2011-07-20T18:17:52Z

Real-Time (Xenomai) Debian Linux from Scratch for Electrum100

← Older revision		Revision as of 18:17, 20 July 2011
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	'''Avoid filesystem corruption'''		'''Avoid filesystem corruption'''

-	If you mount the root filesystem in read-write mode on a MicroSD card, it can happen that, over time, due to repeated power cycles and unclean reboots, some sectors on the card will become unusable. In order to overcome this, mount the root filesystem as read only. Mount /var (if you need kernel logs) and /home on different partitions. In U-Boot, modify bootargs accordingly.	+	If you mount the root filesystem in read-write mode on a MicroSD card, it can happen that, over time, due to repeated power cycles and unclean reboots, some sectors on the card will become unusable. In order to overcome this, mount the root filesystem as read only. Mount /var (if you need kernel logs) and /home on different partitions. In U-Boot, modify ''bootargs'' accordingly.

	U-Boot> setenv bootargs 'console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait ro'		U-Boot> setenv bootargs 'console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait ro'

Support: /* Real-Time (Xenomai) Debian Linux from Scratch for Electrum100 */

2011-07-20T18:16:08Z

Real-Time (Xenomai) Debian Linux from Scratch for Electrum100

← Older revision		Revision as of 18:16, 20 July 2011
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	if((fd = open("/dev/mem", O_RDWR \| O_SYNC)) == -1)		if((fd = open("/dev/mem", O_RDWR \| O_SYNC)) == -1)
	{		{
-	printf("Couldn't open /dev/mem. error %s\n", strerror(errno));	+	printf("Couldn't open /dev/mem. error %s\n", strerror(errno));
-	exit(1);	+	exit(1);
	}		}

Support: /* Real-Time (Xenomai) Debian Linux from Scratch for Electrum100 */

2011-07-20T18:14:38Z

Real-Time (Xenomai) Debian Linux from Scratch for Electrum100

← Older revision		Revision as of 18:14, 20 July 2011
Line 1:		Line 1:
	=Real-Time (Xenomai) Debian Linux from Scratch for Electrum100=		=Real-Time (Xenomai) Debian Linux from Scratch for Electrum100=
-	Contributed by: Razvan-Ionut Stoian - razvan@stoian.us	+	Contributed by: Razvan-Ionut Stoian - [mailto:razvan@stoian.us razvan@stoian.us]

Support: /* Real-Time (Xenomai) Debian Linux from Scratch for Electrum100 */

2011-07-20T18:13:56Z

Real-Time (Xenomai) Debian Linux from Scratch for Electrum100

← Older revision		Revision as of 18:13, 20 July 2011
Line 1:		Line 1:
	=Real-Time (Xenomai) Debian Linux from Scratch for Electrum100=		=Real-Time (Xenomai) Debian Linux from Scratch for Electrum100=
	Contributed by: Razvan-Ionut Stoian - razvan@stoian.us		Contributed by: Razvan-Ionut Stoian - razvan@stoian.us
		+

	This tutorial is split into four sections: compilation of a kernel for Electrum100, installation of Debian Squeeze root filesystem and Xenomai user libraries onto the SBC, and a short Xenomai development example (user-land).		This tutorial is split into four sections: compilation of a kernel for Electrum100, installation of Debian Squeeze root filesystem and Xenomai user libraries onto the SBC, and a short Xenomai development example (user-land).

Support at 18:13, 20 July 2011

2011-07-20T18:13:17Z

Support at 18:11, 20 July 2011

2011-07-20T18:11:01Z

← Older revision		Revision as of 18:11, 20 July 2011
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	$ cd squeeze_rootfs		$ cd squeeze_rootfs
	$ sudo debootstrap --include=openssh-client,openssh-server --exclude=udev --arch=armel --foreign squeeze \		$ sudo debootstrap --include=openssh-client,openssh-server --exclude=udev --arch=armel --foreign squeeze \
-	./ http://ftp.us.debian.org/debian	+	./ http://ftp.us.debian.org/debian
	$ sudo tar cvjf ../squeeze_rootfs.tar.bz2 *		$ sudo tar cvjf ../squeeze_rootfs.tar.bz2 *

← Older revision		Revision as of 18:13, 20 July 2011
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	U-Boot> setenv bootargs 'console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait ro'		U-Boot> setenv bootargs 'console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait ro'

-	More on filesystem corruption on embedded systems here.	+	More on filesystem corruption on embedded systems [http://www.embeddedarm.com/about/resource.php?item=459 here].

	The command line passed to the kernel by U-Boot must contain the lpj parameter. Without it, the BogoMIPS calculation would add to the overall boot time.		The command line passed to the kernel by U-Boot must contain the lpj parameter. Without it, the BogoMIPS calculation would add to the overall boot time.
Line 279:		Line 279:
	Supporting files:		Supporting files:

-	[1] Electrum100 (200) patch for vanilla 2.6.35.9 and kernel configuration file	+	: [1] Electrum100 (200) patch for vanilla 2.6.35.9 and kernel configuration file
-	[2] sample code - real-time GPIO toggling (Xenomai)	+	: [2] sample code - real-time GPIO toggling (Xenomai)

	Sources:		Sources:

-	http://wiki.debian.org/Debootstrap	+	: http://wiki.debian.org/Debootstrap
-	http://code.google.com/p/mini2440/wiki/MiniBringup	+	: http://code.google.com/p/mini2440/wiki/MiniBringup
-	http://www.debianadmin.com/enable-and-disable-ubuntu-root-password.html	+	: http://www.debianadmin.com/enable-and-disable-ubuntu-root-password.html
-	http://www.armadeus.com/wiki/index.php?title=Xenomai:Blinking_LEDs	+	: http://www.armadeus.com/wiki/index.php?title=Xenomai:Blinking_LEDs
-	http://www.embeddedarm.com	+	: http://www.embeddedarm.com
-	http://gna.org/mail/?group=xenomai	+	: http://gna.org/mail/?group=xenomai