Hello Gina, It does. Some of the pins on the GPIO header are a serial port, using TTL levels I think. This translates as /dev/ttyAMA0. Or a PL2303 or FTDI USB to serial adaptor can be used. When I plug a PL2303 adaptor into the USB bus it is assigned to /dev/ttyUSB0. Mike On 05/05/2013 16:44, Georgina Joyce wrote: > Hello Mike, > > Does the raspberry have a serial port? > > Gena > > On 04/05/2013 21:56, Mike Ray wrote: >> Hello Brandon, >> >> What seems to happen is variable. Most of the time I have to work pretty >> hard to make it crash. The best test I have found is opening the SpeakUp >> help and scrolling up and down as quickly as I can. >> >> But it has crashed on occasions with less taxing stuff. >> >> So far I have compiled speakup_soft and speakup_dummy as kernel modules. >> Tonight I am trying compiling the speakup_soft right into the kernel. >> >> I don't really know much about kernel internals or kernel debugging but >> I have been reading up about the kernel debugger (kgdb). I now have an >> idea of connecting two Raspis together via a serial cable and running a >> kernel debug session to see if I can trap exactly where it is crashing. >> >> I'm also trying to get hold of a hardware synth, even just for loan to >> see if I can make it more stable with an external synth. >> >> As a point of interest...I am cross-compiling kernels on a Vinux virtual >> machine. When I first compiled a kernel I did it on the Pi and it took >> 13 hours. >> >> Mike >> >> On 04/05/2013 21:44, Brandon McGinty-Carroll wrote: >>> Are there any actions common to each crash? >>> E.g. an application running, a certain amount of time spent idle, an >>> attempt to copy and paste with speakup? >>> I've ggot an RP here; if I can get an sd card and writer, I'll put on >>> a kernel and give it a whirl. >>> >>> Brandon McGinty-Carroll >>> >>> >>> On Fri, May 03, 2013 at 07:29:57PM +0100, Mike Ray wrote: >>>> Hello Gene, >>>> >>>> Thanks for the welcome. >>>> >>>> Although I have SpeakUp running in Raspbian, there are some serious >>>> stability issues. Sometimes the tty I'm logged in to crashes and >>>> occasionally the kernel crashes, or I assume it does as once this >>>> happens there's no way I can tell what has happened. >>>> >>>> In getting this far I have had to look at the source quite closely >>>> and I noticed the changes over the last few years following some >>>> fundamental kernel changes. >>>> >>>> It looks to me as if a lot of the distros are making patches to the >>>> source and these patches don't seem to find their way back to the >>>> SpeakUp source repo. >>>> >>>> In an effort to solve the stability issues in the Pi kernel version >>>> 3.6.11 I took the SpeakUp source from kernel.org's 3.8.11 tree but >>>> it doesn't seem to have solved the problem. >>>> >>>> I don't know if these stability problems are specifically Raspberry >>>> Pi problems, possibly relating to the lower resources on the little >>>> machine, or whether SpeakUp is unstable in some desktop distros. >>>> >>>> Opinions and any help would be welcomed. >>>> >>>> Mike >>>> >>>> >>>> >>>> On 03/05/2013 19:03, acollins at icsmail.net wrote: >>>>> Hello Mike! Welcome aboard! I'm not a raspberry user, but I'm >>>>> glad to >>>>> hear you have yours up and running. You'll find most topics fair >>>>> game >>>>> for discussion here. >>>>> >>>>> Gene Collins >>>>> >>>>>> Hello, >>>>>> >>>>>> I've just joined the list. >>>>>> >>>>>> I have recently managed to get SpeakUp going for the Raspberry Pi >>>>>> using >>>>>> Raspbian. >>>>>> >>>>>> In doing so I've had to do a lot of reading about kernel versions >>>>>> and >>>>>> SpeakUp source etc. so I thought I'd join the list. >>>>>> >>>>>> Mike >>>>>> >>>>>> -- >>>>>> Michael A. Ray >>>>>> Analyst/Programmer >>>>>> South-east UK >>>>>> >>>>>> Interested in accessibility for the Raspberry Pi? >>>>>> Visit: http://www.raspberryvi.org/ >>>>>> >>>>>> From where you can join our mailing list for visually impaired Pi >>>>>> hackers >>>>>> >>>>>> _______________________________________________ >>>>>> Speakup mailing list >>>>>> Speakup at linux-speakup.org >>>>>> http://linux-speakup.org/cgi-bin/mailman/listinfo/speakup >>>> _______________________________________________ >>>> Speakup mailing list >>>> Speakup at linux-speakup.org >>>> http://linux-speakup.org/cgi-bin/mailman/listinfo/speakup >> >> > -- Michael A. Ray Analyst/Programmer Witley, Surrey, South-east UK Interested in accessibility on the Raspberry Pi? Visit: http://www.raspberryvi.org/ From where you can join our mailing list for visually-impaired Pi hackers
