More Pi things, IO working on the Raspberry Pi

Jan Panteltje · 2013-03-11T10:47:42+00:00

More Pi things, IO working on the Raspberry Pi My mistake did not have the 26 pole connector... Anyways got the IO working, there is a C library for that, look for bcm2835-1.22.tar.gz Also have risc OS working on the PI, not sure I if will pursue that, but in theory it should make it possible to get rid of the task switching gap, I will need a very steady IO stream... The other thing, for all the *fearless* Pi hackers here, my little modification of /etc/passwd, pick you choice of Pie! #pi:x:1000:1000:,,,:/home/pi:/bin/bash #pi:x:0:0:,,,:/home/pi:/bin/bash pi:x:0:0:,,,:/root:/bin/bash The first is the original, it sucks as nothing works not even remote x as root. The second logs in as root if you do ssh -Y pi@192.168.178.10 (or whateverIP[1]) The third is what I use, here it goes, I love this: [1] I modified it for a fixed IP address, as already dhcp assigned the one frommy laptop to the PI... 70 looked like a nice number. So now we have IO, and the fun can begin, gotta get the scope and test for maxspeed and task switch interrupt. On the side: Last night I made backups from the modified image, so I do not lose a Saturdayof work, and also wrote all files and notes to a bluray disk. So what's to fear? If you ever mess up in a big way and lose your way, at most one day work is lost. As now there is the SDcard, (SDcards in my case), the copy of the image on harddisk, and the copy of it (all with sha1sums) on bluray on ext2 filesystem. That is how *I* work (most of the time), My database entry for disk 927: 927 BD-R-25 Platinum 4x inkjet printable LG BH10LS38 ext2 filesystem Raspberry debian 8 GB SDcard image with librtlsdr, xforms, fftw3, xpsa, dump1090 Risc OS image Original debian image Method: dd if=/dev/zero bs=1000000000 count=25 > mke2fs mount -o loop=/dev/loop0 /mnt/loop cp ... /mnt/loop/ # stay below about 22.3 GB du /mnt/loop umount /dev/loop0 growisofs -speed=4 -dvd-compat -Z /dev/ # l /mnt/loop total 13882600 drwx------ 2 root root ...

Mar 11, 2013 20 Replies

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John Devereux 13 years ago

Well yes, sure, sorry. Generally I do this sort of thing from a rescue CD / stick of some sort, none of the normal drives are mounted.

John

John Devereux

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