Re: [Angstrom-devel] AM1808
On 07/26/2011 01:24 PM, Koen Kooi wrote: Note that framebuffer and display are 2 completely seperate things. The framebuffer is just a portion of RAM linux will draw into, getting that out onto a display is something else. Yep. And I am happy for this, as in the end I want to design an embedded device that does not have a display but the framebuffer is just a chunk of memory (to be viewed via VNC only when desired). But I think, that for development a physical display can be beneficial and thus I want to do the first steps using one and stick with the standard ways. I understand that (with the OMAP chip that does not have any graphic-accelerator hardware), the framebuffer Kernel driver allocates a chunk of memory when loaded and allows the Xorg server to write and read to same via the /dev/fs device. The driver also makes the chip's DMA hardware read the framebuffer memory to create a visible output on the LCD (or video screen) In the end I'd like to modify the (or find a modified) framebuffer Kernel driver in a way that I (at best at runtime) can switch off the display and disable the DMA (and with it the non-cacheable feature of the FB's RAM area). With that I hope to increase the performance. What do you think ? -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
On 07/19/2011 12:16 PM, Koen Kooi wrote: I tried to update the Distribution via the opkg package manager. Lots of files were downloaded, but when opkg tried to install them I get an error message like too small memory. The board has 32 MB RAM Does it really only have 32M or is that artificially limited by uboot setting mem=32M? I found that mem=32M is given in the Kernel command line. Can this easily be changed (I'm quite new to u-boot) ? Thanks, -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
Op 26 jul. 2011, om 12:59 heeft Michael Schnell het volgende geschreven: On 07/19/2011 12:16 PM, Koen Kooi wrote: I tried to update the Distribution via the opkg package manager. Lots of files were downloaded, but when opkg tried to install them I get an error message like too small memory. The board has 32 MB RAM Does it really only have 32M or is that artificially limited by uboot setting mem=32M? I found that mem=32M is given in the Kernel command line. Can this easily be changed (I'm quite new to u-boot) ? Yes, look back a few emails in the thread :) ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
Op 21 jul. 2011, om 14:02 heeft Michael Schnell het volgende geschreven: We want to use an LCD display (mainly for development and maintenance). The kit features a socket for the chip's LCD/Video pins. We are going to get an LCD panel to connect to the board or to find a converter that allows connecting some standard monitor. (Question 5) How to configure, use and test the LCD and/or Video output ? No idea on that, sorry. I think that's a question for logicPD. I know that the stock LCD is supported by angstrom out of the box. Just to let you know: The framebuffer driver seems to be in the Kernel as well: cat /proc/fp 0 D8Axx FB Drv Now I need to find some Display to attach to the boards socket. Note that framebuffer and display are 2 completely seperate things. The framebuffer is just a portion of RAM linux will draw into, getting that out onto a display is something else. ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
On 07/19/2011 12:16 PM, Koen Kooi wrote: We want to use I²S audio output. The kit does feature an I²S to analog converter. (Question 4) How to configure, use and test the audio output ? No idea on that, sorry. I think that's a question for logicPD. Just to let you know: I simply loaded some alsa-* pakages and aplay does produce audio output via the I²S interface of the L128 Chip and the I²C to analog converter on the base board. There is still no Kernel Module loaded, so it seems like the I²S driver for the on-chip hardware (I was told this is an AIC3106 audio codec already is compiled in the Kernel (identifying itself as Linux version 2.6.33-rc4 (x0029463@psplinux051) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203) ) #1 PREEMPT Thu Mar 25 15:06:29 IST 2010). opkg list-installed says: kernel - 2.6.32+2.6.33-rc4-r50+gitr2acf935c01b9adb50164d421c40cdc5862b9e143-r50.6 kernel-2.6.33-rc4 - 2.6.32+2.6.33-rc4-r50+gitr2acf935c01b9adb50164d421c40cdc5862b9e143-r50.6 kernel-image-2.6.33-rc4 - 2.6.32+2.6.33-rc4-r50+gitr2acf935c01b9adb50164d421c40cdc5862b9e143-r50.6 kernel-module-ipv6 - 2.6.32+2.6.33-rc4-r50+gitr2acf935c01b9adb50164d421c40cdc5862b9e143-r50.6 kernel-module-nls-utf8 - 2.6.32+2.6.33-rc4-r50+gitr2acf935c01b9adb50164d421c40cdc5862b9e143-r50.6 kernel-module-smbfs - 2.6.32+2.6.33-rc4-r50+gitr2acf935c01b9adb50164d421c40cdc5862b9e143-r50.6 so it looks like this is the stock Kernel. -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
We want to use an LCD display (mainly for development and maintenance). The kit features a socket for the chip's LCD/Video pins. We are going to get an LCD panel to connect to the board or to find a converter that allows connecting some standard monitor. (Question 5) How to configure, use and test the LCD and/or Video output ? No idea on that, sorry. I think that's a question for logicPD. I know that the stock LCD is supported by angstrom out of the box. Just to let you know: The framebuffer driver seems to be in the Kernel as well: cat /proc/fp 0 D8Axx FB Drv Now I need to find some Display to attach to the boards socket. -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
On 07/20/2011 10:26 AM, Koen Kooi wrote: that will get you 'opkg-cl' back In fact, IIRC, opkg-cl was not missing, just opkg So just using opkg-cl is the trick :-) now opkg-cl update works and opkg-cl upgrade. just returns after some seconds. seemingly the installation is up to date. thanks a lot for your help ! -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
Hi, I am definitely not an expert, but here what I can tell. Angstrom is use for such SoC as Gumstix Overo, BeagleBoard, etc. without any significant problems. For example Gumstix Overo Fire (that's what I am using) has 256MB RAM and 256MB NAND, but they already moves to 512/512 configuration. For installing additional packages I would suggest you building it yourself and installing on machine: opkg install package_name.ipk OpenEmbedded (OE) metadata is used for cross-compiling packages and building kernel, u-boot, x-load, rootfs images. Now they have changes directory structure, to oe-core, meta-oe, and of course there is Angstrom meta layer. There should some instructions how to combine every layer and setup Bitbake to build up-to-date Angstrom images and packages. As I remember all modules are build-in into kernel, that's why there is no external ones. In other words, kernel doesn't depend on rootfs image (I think). You can easily change kernel without changing any files on rootfs and vice versa. Then you build your kernel with Bitbake using OE metadata packages for linux modules are created. So you can grab ipk files and install them on your rootfs (NAND) and load them as you want. Example of modules packages: /overo/kernel-module-stv6110_2.6.34-r97.6_overo.ipk./overo/kernel-module-usbtmc_2.6.34-r97.6_overo.ipk./overo/kernel-module-s2255drv_2.6.34-r97.6_overo.ipk./overo/kernel-module-twofish-common_2.6.34-r97.6_overo.ipk./overo/kernel-module-snd-seq-device_2.6.34-r97.6_overo.ipk./overo/kernel-module-sha1-generic_2.6.34-r97.6_overo.ipk... There are tons of different configurations (machine, distro, your local configuration, package configs, etc.). Let's say for console version of Angstrom I would build omap3-console-image image, for gnome dekstop version I would go for omap3-desktop-image. Those images builds OS images (kernel, rootfs, etc), but with different packages included. I hope this answered at least some of the questions. -david Date: Tue, 19 Jul 2011 11:31:29 +0200 From: mschn...@lumino.de To: angstrom-distro-devel@linuxtogo.org Subject: [Angstrom-devel] AM1808 Hi experts. I am new to this list, so please pardon me, if I violate any rules or this is off-topic here. We are starting to design a controller based on an AM1808 (or maybe an upcoming AM 335x) chip. Right now, we just have a Development kit (by Logic PD) that features an OMAP 138 Chip (that is pin-compatible with the AM1808 but additionally has a DSP) We started playing with this kit and now, I have several questions that you might be able to answer. The board came with an Angstrom Linux distribution. (Question 1) Can you give us a hint, whether it's a good idea to use Angstrom for an embedded controller or do you suggest to use another distributions (binary and/or cross compilable-source-code) ? I tried to update the Distribution via the opkg package manager. Lots of files were downloaded, but when opkg tried to install them I get an error message like too small memory. The board has 32 MB RAM and the file system is close to empty. (At home I have another ARM hardware (a SLUG) with (IIRC) only 32 MB RAM and here updating via apt works just fine.) The board we are going to design will have 256 MB RAM, so I suppose this problem will not be seen there. Moreover I tried to install an additional package via opkg: same error. (Question 2) How to use opkg on this device or upgrading the distribution (including the Kernel)l and installing additional packages (like audio and X)? I found that lsmod shows no loaded modules. But as busybox is configured to feature the module specific commands I suppose the distribution does support modules (Question 3) Can this system be enhanced with Kernel modules ? Why are no modules loaded after starting ? We want to use I²S audio output. The kit does feature an I²S to analog converter. (Question 4) How to configure, use and test the audio output ? We want to use an LCD display (mainly for development and maintenance). The kit features a socket for the chip's LCD/Video pins. We are going to get an LCD panel to connect to the board or to find a converter that allows connecting some standard monitor. (Question 5) How to configure, use and test the LCD and/or Video output ? We want to be able to run software that has a GUI. (Question 6) How to install a system that allows for running GUI software (X11, QT or GTK or ???, ...) We want to be able to run the system without a monitor connected. (Question 7) How to install and use VNC (or whatever) to remote-control the GUI of a running program ? Thanks in advance for any answers, tips and tricks. Have fun, -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org
Re: [Angstrom-devel] AM1808
Op 19 jul 2011, om 11:31 heeft Michael Schnell het volgende geschreven: Hi experts. I am new to this list, so please pardon me, if I violate any rules or this is off-topic here. We are starting to design a controller based on an AM1808 (or maybe an upcoming AM 335x) chip. Right now, we just have a Development kit (by Logic PD) that features an OMAP 138 Chip (that is pin-compatible with the AM1808 but additionally has a DSP) We started playing with this kit and now, I have several questions that you might be able to answer. The board came with an Angstrom Linux distribution. (Question 1) Can you give us a hint, whether it's a good idea to use Angstrom for an embedded controller or do you suggest to use another distributions (binary and/or cross compilable-source-code) ? Over here at angstrom we suggest angstrom :) I tried to update the Distribution via the opkg package manager. Lots of files were downloaded, but when opkg tried to install them I get an error message like too small memory. The board has 32 MB RAM Does it really only have 32M or is that artificially limited by uboot setting mem=32M? and the file system is close to empty. (At home I have another ARM hardware (a SLUG) with (IIRC) only 32 MB RAM and here updating via apt works just fine.) The board we are going to design will have 256 MB RAM, so I suppose this problem will not be seen there. Moreover I tried to install an additional package via opkg: same error. The board distributor and/or vendor installed angstrom on their own, so I don't know which version is on there and if there were some improvements made by the vendor. I'd suggest going to http://narcissus.angstrom-distribution.org/ And building a new image for the 'da850-omapl138-evm' machine (which matches your evm). (Question 2) How to use opkg on this device or upgrading the distribution (including the Kernel)l and installing additional packages (like audio and X)? Normally it's a matter of 'opkg update ; opkg install foo', you can see which packages are available at: http://www.angstrom-distribution.org/repo/ Note that not all angstrom releases have the same packages available, but we do try. I found that lsmod shows no loaded modules. But as busybox is configured to feature the module specific commands I suppose the distribution does support modules (Question 3) Can this system be enhanced with Kernel modules ? Why are no modules loaded after starting ? Yes, and for the second question, I don't know about the improvements that were made on top of a standard angstrom. We want to use I²S audio output. The kit does feature an I²S to analog converter. (Question 4) How to configure, use and test the audio output ? No idea on that, sorry. I think that's a question for logicPD. We want to use an LCD display (mainly for development and maintenance). The kit features a socket for the chip's LCD/Video pins. We are going to get an LCD panel to connect to the board or to find a converter that allows connecting some standard monitor. (Question 5) How to configure, use and test the LCD and/or Video output ? No idea on that, sorry. I think that's a question for logicPD. I know that the stock LCD is supported by angstrom out of the box. We want to be able to run software that has a GUI. (Question 6) How to install a system that allows for running GUI software (X11, QT or GTK or ???, ...) See my answers to question 1 and 2 :) We want to be able to run the system without a monitor connected. (Question 7) How to install and use VNC (or whatever) to remote-control the GUI of a running program ? For X11 you can install x11vnc and qt has a vnc plugin you can use, configuring those is a bit out of scope for angstrom, but let us know if you run into any troubles. regards, Koen ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
On 07/19/2011 12:16 PM, Koen Kooi wrote: Over here at angstrom we suggest angstrom :) Yep. As I am new to angstrom. I) wanted to make sure that it's suitable for embedded controllers with AM1808 or AM 335x Does it really only have 32M or is that artificially limited by uboot setting mem=32M? The hardware is: http://www.logicpd.com/products/system-modules/texas-instruments-omap-l138-som-m1#tabs-som-2 Here they say it's either 64 or 128 MB but on the command line I get root@da850-omapl138-evm:~# cat /proc/meminfo MemTotal: 28120 kB MemFree: 11636 kB Buffers:1052 kB Cached: 8796 kB SwapCached:0 kB Active: 5336 kB Inactive: 6372 kB Active(anon): 2016 kB Inactive(anon):0 kB Active(file): 3320 kB Inactive(file): 6372 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty:16 kB Writeback: 0 kB AnonPages: 1888 kB Mapped: 2200 kB Shmem: 156 kB Slab: 2636 kB SReclaimable:924 kB SUnreclaim: 1712 kB KernelStack: 360 kB PageTables: 232 kB NFS_Unstable: 0 kB Bounce:0 kB WritebackTmp: 0 kB CommitLimit: 14060 kB Committed_AS: 6644 kB VmallocTotal: 985088 kB VmallocUsed: 400 kB VmallocChunk: 984612 kB So maybe it in fact memory artificially limited. What to do about this ? (I'm new to uboot, too.) The board distributor and/or vendor installed angstrom on their own, so I don't know which version is on there and if there were some improvements made by the vendor. I'd suggest going to http://narcissus.angstrom-distribution.org/ And building a new image for the 'da850-omapl138-evm' machine (which matches your evm). I'll try to do this. But I suppose this will not take care of any uboot issues. Moreover I suppose I need to persuade uboot to install the new Kernel. Right now I don't know how to do this. (Question 2) How to use opkg on this device or upgrading the distribution (including the Kernel)l and installing additional packages (like audio and X)? Normally it's a matter of 'opkg update ; opkg install foo', I did try both and got the said error message: root@da850-omapl138-evm:~# opkg install ppp Upgrading ppp on root from 2.4.3-r9.5 to 2.4.3-r9.6... Downloading http://www.angstrom-distribution.org/feeds/unstable/ipk/glibc/armv5te/base/ppp_2.4.3-r9.6_armv5te.ipk. Collected errors: * gz_open: fork: Cannot allocate memory. * opkg_install_pkg: Failed to unpack control files from /tmp/opkg-GhmigW/ppp_2.4.3-r9.6_armv5te.ipk. * opkg_install_cmd: Cannot install package ppp. you can see which packages are available at: http://www.angstrom-distribution.org/repo/ I did check this and found an impressive number :) . Note that not all angstrom releases have the same packages available, but we do try. Obviously :) . That is why I at first tried to upgrade to the current version. I found that lsmod shows no loaded modules. But as busybox is configured to feature the module specific commands I suppose the distribution does support modules (Question 3) Can this system be enhanced with Kernel modules ? Why are no modules loaded after starting ? Yes, and for the second question, I don't know about the improvements that were made on top of a standard angstrom. I see. We want to use I²S audio output. The kit does feature an I²S to analog converter. (Question 4) How to configure, use and test the audio output ? No idea on that, sorry. I think that's a question for logicPD. Not exclusively. Of course a driver for the Chips I²S hardware is necessary. But as same is not specific to the PCB, but just to the TI-chip, I did hope it's included in one of the standard packages. AFAIK, the I²S to analog hardware in the board does not need any software support. But on top of the driver, I understand that I need to install the ALSA sub-system. And additionally, I need some user program that can output a sound just for testing. I hoped that these are standard issues that are covered by the distribution. We want to use an LCD display (mainly for development and maintenance). The kit features a socket for the chip's LCD/Video pins. We are going to get an LCD panel to connect to the board or to find a converter that allows connecting some standard monitor. (Question 5) How to configure, use and test the LCD and/or Video output ? No idea on that, sorry. I think that's a question for logicPD. I know that the stock LCD is supported by angstrom out of the box. Sounds good. Again I don't suppose that Logic PD has anything to do with this, as the PCB just routes the TI-chip's appropriate pins to a socket. We want to be able to run software that has a GUI. (Question 6) How to install a system that allows for running GUI software (X11, QT or GTK or ???, ...) See my
Re: [Angstrom-devel] AM1808
On 07/19/2011 12:19 PM, David Abdurachmanov wrote: For installing additional packages I would suggest you building it yourself and installing on machine: opkg installpackage_name.ipk opkg did load the .ipg files, but when trying to install them I get: root@da850-omapl138-evm:~# ls -l ppp* -rw-r--r--1 root root 1118 May 15 07:59 ppp-dialin_0.1-r7.6_all.ipk -rw-r--r--1 root root 146258 May 15 07:59 ppp_2.4.3-r9.6_armv5te.ipk root@da850-omapl138-evm:~# opkg install ppp_2.4.3-r9.6_armv5te.ipk Collected errors: * gz_open: fork: Cannot allocate memory. * pkg_init_from_file: Failed to extract control file from ppp_2.4.3-r9.6_armv5te.ipk. OpenEmbedded (OE) metadata is used for cross-compiling packages and building kernel, u-boot, x-load, rootfs images. Now they have changes directory structure, to oe-core, meta-oe, and of course there is Angstrom meta layer. There should some instructions how to combine every layer and setup Bitbake to build up-to-date Angstrom images and packages. As there is nothing relevant on this device, I could start with a completely new installation from the sources. But right now I did not look for instructions on how to do this. As I remember all modules are build-in into kernel, that's why there is no external ones. In other words, kernel doesn't depend on rootfs image (I think). I see. You can easily change kernel without changing any files on rootfs and vice versa. Because of the said memory problem, I suppose I can't unpack a Kernel package I hope this answered at least some of the questions. Thanks a lot !!! -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
On 07/19/2011 05:22 AM, Michael Schnell wrote: On 07/19/2011 12:19 PM, David Abdurachmanov wrote: For installing additional packages I would suggest you building it yourself and installing on machine: opkg installpackage_name.ipk opkg did load the .ipg files, but when trying to install them I get: root@da850-omapl138-evm:~# ls -l ppp* -rw-r--r-- 1 root root 1118 May 15 07:59 ppp-dialin_0.1-r7.6_all.ipk -rw-r--r-- 1 root root 146258 May 15 07:59 ppp_2.4.3-r9.6_armv5te.ipk root@da850-omapl138-evm:~# opkg install ppp_2.4.3-r9.6_armv5te.ipk Collected errors: * gz_open: fork: Cannot allocate memory. * pkg_init_from_file: Failed to extract control file from ppp_2.4.3-r9.6_armv5te.ipk. OpenEmbedded (OE) metadata is used for cross-compiling packages and building kernel, u-boot, x-load, rootfs images. Now they have changes directory structure, to oe-core, meta-oe, and of course there is Angstrom meta layer. There should some instructions how to combine every layer and setup Bitbake to build up-to-date Angstrom images and packages. As there is nothing relevant on this device, I could start with a completely new installation from the sources. But right now I did not look for instructions on how to do this. As I remember all modules are build-in into kernel, that's why there is no external ones. In other words, kernel doesn't depend on rootfs image (I think). I see. You can easily change kernel without changing any files on rootfs and vice versa. Because of the said memory problem, I suppose I can't unpack a Kernel package What kind of disk space do you have available? You might be able to add a swap file to extend your 32MB of RAM. -- Gary Thomas | Consulting for the MLB Associates |Embedded world ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
Op 19 jul 2011, om 13:14 heeft Michael Schnell het volgende geschreven: On 07/19/2011 12:16 PM, Koen Kooi wrote: Over here at angstrom we suggest angstrom :) Yep. As I am new to angstrom. I) wanted to make sure that it's suitable for embedded controllers with AM1808 or AM 335x Does it really only have 32M or is that artificially limited by uboot setting mem=32M? The hardware is: http://www.logicpd.com/products/system-modules/texas-instruments-omap-l138-som-m1#tabs-som-2 Here they say it's either 64 or 128 MB but on the command line I get root@da850-omapl138-evm:~# cat /proc/meminfo MemTotal: 28120 kB [..] So maybe it in fact memory artificially limited. What to do about this ? (I'm new to uboot, too.) If you attach a serial console and go into uboot you can do the following (hawkboard has a AM1808 as well): U-Boot 2009.01-dirty (Nov 18 2009 - 23:30:48) DRAM: 128 MB NAND: NAND device: Manufacturer ID: 0x2c, Chip ID: 0xa1 (Micron NAND 128MiB 1,8V 8-bit) [..] hawkboard.org print bootargs bootargs=console=ttyS2,115200n8 root=/dev/mmcblk0p1 rw rootwait mem=64M And here we see that while 128MB is installed (the DRAM: line) linux only gets to see 64M (the mem= part), to fix that, do: hawkboard.org setenv bootargs 'bootargs=console=ttyS2,115200n8 root=/dev/mmcblk0p1 rw rootwait mem=128M' hawkboard.org saveenv Saving Environment to NAND... Erasing Nand... Erasing at 0x0 -- 100% complete. Writing to Nand... done hawkboard.org In your case you might see 'DRAM: 64MB' and need to pass in mem=64M, but you get the general idea. The board distributor and/or vendor installed angstrom on their own, so I don't know which version is on there and if there were some improvements made by the vendor. I'd suggest going to http://narcissus.angstrom-distribution.org/ And building a new image for the 'da850-omapl138-evm' machine (which matches your evm). I'll try to do this. But I suppose this will not take care of any uboot issues. Moreover I suppose I need to persuade uboot to install the new Kernel. Right now I don't know how to do this. (Question 2) How to use opkg on this device or upgrading the distribution (including the Kernel)l and installing additional packages (like audio and X)? Normally it's a matter of 'opkg update ; opkg install foo', I did try both and got the said error message: root@da850-omapl138-evm:~# opkg install ppp Upgrading ppp on root from 2.4.3-r9.5 to 2.4.3-r9.6... The r9.5 - r9.6 shows that it tries to upgrade for a pretty old angstrom to a more recent one: koen@dominion:/OE/angstrom-2008/sources/openembedded$ git blame conf/distro/angstrom-2008.1.conf | grep DISTRO_PR 56a7be99 (Koen Kooi 2010-09-07 15:03:44 +0200 18) DISTRO_PR = .6 So that's almost a year ago. Trying to update thru opkg would upgrade everything, so I'd advice generating a brand new image or ask logicPD if they have something more recent Downloading http://www.angstrom-distribution.org/feeds/unstable/ipk/glibc/armv5te/base/ppp_2.4.3-r9.6_armv5te.ipk. Collected errors: * gz_open: fork: Cannot allocate memory. * opkg_install_pkg: Failed to unpack control files from /tmp/opkg-GhmigW/ppp_2.4.3-r9.6_armv5te.ipk. * opkg_install_cmd: Cannot install package ppp. That version of angstrom lacks the opkg low-mem fixes, so it failing on 32M is expected. you can see which packages are available at: http://www.angstrom-distribution.org/repo/ I did check this and found an impressive number :) . Note that not all angstrom releases have the same packages available, but we do try. Obviously :) . That is why I at first tried to upgrade to the current version. I found that lsmod shows no loaded modules. But as busybox is configured to feature the module specific commands I suppose the distribution does support modules (Question 3) Can this system be enhanced with Kernel modules ? Why are no modules loaded after starting ? Yes, and for the second question, I don't know about the improvements that were made on top of a standard angstrom. I see. We want to use I²S audio output. The kit does feature an I²S to analog converter. (Question 4) How to configure, use and test the audio output ? No idea on that, sorry. I think that's a question for logicPD. Not exclusively. Of course a driver for the Chips I²S hardware is necessary. But as same is not specific to the PCB, but just to the TI-chip, I did hope it's included in one of the standard packages. AFAIK, the I²S to analog hardware in the board does not need any software support. But on top of the driver, I understand that I need to install the ALSA sub-system. And additionally, I need some user program that can output a sound just for testing. I hoped that these are standard issues that are covered by the distribution. A distribution generally just integrates what is already out there. Angstrom is a bit of a special case since a lot of the
Re: [Angstrom-devel] AM1808
On 07/19/2011 01:37 PM, Koen Kooi wrote: If you attach a serial console and go into uboot you can do the following (hawkboard has a AM1808 as well): ... I'll try that ASAP. So that's almost a year ago. Trying to update thru opkg would upgrade everything, so I'd advice generating a brand new image or ask logicPD if they have something more recent OK. I'll see how that can be done. That version of angstrom lacks the opkg low-mem fixes, so it failing on 32M is expected. Of course a brand new installation will fix this. But as this is just a preliminary test (we will get a new board with an AM1808 quite soon), I'd rather just upgrade opkg. Is there a chance just to exchange a few files for doing this an do a normal upgrade afterward (delaying the need to do a brand new installation) ? A distribution generally just integrates what is already out there. Angstrom is a bit of a special case since a lot of the developers either work for a silicon or board vendor or are consultants for such companies. Sounds good. If I2S is present on one of the logicPD daughterboards chances are good drivers are already there, but only for the specific codec on the daughterboards. For other codecs you might need to write some small ASoC glue. The board has nothing to do with that. There is just a chip converting I²S to analog. It supposedly does not need any configuration. So the I²S Kernel driver just needs to know the chip (OMAP L138 (completely compatible with AM1808) ). The hardware-codec (audio byte stream to I²S - converter) is built in the the chip. Thanks to things like pinmuxing that line is less clear than you might think :( Of course you are right. But looking at pinmuxing we found that functions do share pins, but there are no function available on multiple pins. So this is a matter of selecting which function is on a pin. I don't suppose that the Logic-PD hardware on the PCB de-muxes any pins to multiple available functions, but I'm not sure, yet. So you suggest that X11 and (e.g.) GTK and whatever necessary are just packages that can be installed ? Exactly. 32M is going to be really tight for running any reasonable gui in X11, That is why the board we are going to design will get 256 MB :) . Narcissus has a few predefined choices and will show the packages it will install on the screen, so you can install them manually as well. For small memory systems, try gpe, matchbox or enlightenment, gnome is way too heavy for that. I did not yet think about the Desktop system at all. Thanks for the pointers ! X11vnc hooks into an existing server as a client and can the started at will, so it's more flexible than the Xvnc way of doing it you mention. I suppose that is what I will need. The program (and supposedly the Desktop system before) is supposed to start automatically when the system boots and I want to be able to attach vie VNC to monitor the GUI of the running program. -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
On 07/19/2011 06:30 AM, Michael Schnell wrote: On 07/19/2011 01:25 PM, Gary Thomas wrote: What kind of disk space do you have available? You might be able to add a swap file to extend your 32MB of RAM. I understand that there is a lot of disk space, as an SD-card is used for the root file system. meminfo says: SwapTotal: 0 kB SwapFree: 0 kB though. Maybe I need to create a swap partition and activate it. But I have no idea how I can do this. Try something like this: # dd if=/dev/zero of=/SWAP bs=1024 count=512M # mkswap /SWAP # swapon /SWAP This will generate a SWAP file (not partition) of 512MB which should be more than enough for you to run opkg. -- Gary Thomas | Consulting for the MLB Associates |Embedded world ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
Re: [Angstrom-devel] AM1808
On 07/19/2011 01:25 PM, Gary Thomas wrote: What kind of disk space do you have available? You might be able to add a swap file to extend your 32MB of RAM. I understand that there is a lot of disk space, as an SD-card is used for the root file system. meminfo says: SwapTotal: 0 kB SwapFree: 0 kB though. Maybe I need to create a swap partition and activate it. But I have no idea how I can do this. -Michael ___ Angstrom-distro-devel mailing list Angstrom-distro-devel@linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/angstrom-distro-devel
