Upgrade notes

Problems with reading analog channels consistently made the current system unreliable. So, I tried a new Angstrom drop (dated June 18th, 2012.) That did not work due to GSM modem (/dev/ttyHS*) problems, whereby the system somehow kept doing something to the Icon modem keeping it from registering with AT&T. The new drop was:

Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.05-beaglebone-2012.06.18.img.xz

So, I decided to just try upgrading the current system. I copied an image of the current working system from the 4GB microSD card to a new card (using linux 'dd if=/dev/sdb of=/dev/sdc', where /dev/sdb is the original microsd card and /dev/sdc is the new fresh card) , then tried doing 'opkg update', 'opkg upgrade' with the new microsd card copy. I moved the new kernel (3.2.14) to the right place as discussed in this blog previously. Then I installed from ipk files tcl, tcllib and modeswitch. Modeswitch install  failed due to problems with the names of perl package files, so I added perl package links:

ln -s /var/lib/opkg/info/perl-module-build.list /var/lib/opkg/info/perl-module-build.pm.list
ln -s /var/lib/opkg/info/perl-module-load.list /var/lib/opkg/info/perl-module-load.pm.list


which made the modeswitch opkg install of modeswitch work.
 

After all that, the analog channel shifting seems to still be a problem. So, on the hunch that a delay was needed between reading channels I added 0.1 seconds in the loop that reads channels. We will see how this turns out.


Later: Badly. Problem still there. Channel 1 is at ain1 at first, then ain2 later.  So, on the hunch that the problem had something to do with the files descriptor pointer, I tried doing a 'seek()' to rewind file and that has worked so far.