Thank you, let me try to program this way.
On 3/21/06, justin joseph <justin_joseph007 at yahoo.com> wrote: > > The circuit that you have used(the one from the lirc site) works on their > driver. Just had a glance at their > driver(/lirc-0.8.0/drivers/lirc_serial/lirc_serial.c). > The comment says explicitly : > > * > * lirc_serial - Device driver that records pulse- and pause-lengths > * (space-lengths) between DDCD event on a serial port. > * > > the read syscall, that you are trying to use in your user space pgm, on > /dev/ttys0 reads only data that are there on the registers related with pin > 2(RXD). This is my idea, the dcd pin is basically for connecting devices > like modem's. To get a clear idea refer serial programming guide for POSIX > operating systems: > > http://www.easysw.com/~mike/serial/serial.html#3_1_3<http://www.easysw.com/%7Emike/serial/serial.html#3_1_3> > > comming back to lirc_serial.c the driver from lirc.org, it is using the > rdtsc instruction to do its work(read that from comments). > > from the around half an hour i spend on your problem i think the reception > mechanism is working not by reading some data, but by measuing pulse lengths > on the dcd. and that reading is originally being done by lirc_serial.c > kernel driver. > > So for your user level program to work you nead to replicate that > functionality in your code. > > Justin > > > > > > *thoma <arunthomas007 at gmail.com>* wrote: > > Hi, > The project is to control a media player using a remote control. i can > make the media player. The problem is the receiver code. > i made a receiver as shown in the www.lirc.org website. The circuit > diagram is attached with this mail. i am using an LG remote control. > The whole thing is working using LIRC software. But i want to write my own > program and dont want to write a driver, since it is too hard. > So the program should be able to read data(signals) from the serial port. > The code i have written is as follows. > > #include <stdio.h> */* Standard input/output definitions */* > #include < > string.h> */* String function definitions */* > #include <unistd.h> > */* UNIX standard function definitions */* > #include <fcntl.h> */* File control definitions */* > > #include > <errno.h> */* Error number definitions */* > #include <termios.h> > */* POSIX terminal control definitions */* > main() > { > //*struct* termios ts; > char buff[1000]= > ""; > int fd; > int nbytes=0; > > fd = open( > "/dev/ttyS0", O_RDONLY | O_NOCTTY | O_NDELAY); > *if* (fd == -1) > { > perror("open_port: Unable to open /dev/ttyS0 - > " > ); > } > *else* > { > write(1,"starting",8); > > > fcntl(fd, F_SETFL, 0); > nbytes=read(fd,buff,*sizeof*(buff)); > > write(1 > ,"\nThe signal from serial port is > \n > ",33); > write(1,buff,nbytes); > write( > 1,"\n", > 1); > > } > } > > The program works with my serial mouse. But when i connect the receiver > circuit, it simply waits for the signals. i just want to get different > signals from different buttons in the remote. > Is there any other problem with the code. . > i tried python also. Still not getting any output. > > hope u will reply soon. > > Thank You, > Arun Thomas > Model Engineering College > Cochin - Show quoted text - > > > On 3/20/06, Raj Shaz <rajshas at gmail.com> wrote: > > > > well im not sure wot do u mean by open("/dev/ttyS0", O_RDONLY) > > which is these codes? > > See, serial programming can be done in trillion ways. Everone will > > tell his/her own views` ... take one and chuck others ... but all lead > > more or less in same way. > > > > anyway i prefer python . since it work as if ur working on a file ... > > open read/write close. simple... and libraries are good. > > > > google ull get ans. > > > > -raj > > > > On 3/19/06, justin joseph < justin_joseph007 at yahoo.com> wrote: > > > > > > > > > --- thoma <arunthomas007 at gmail.com> wrote: > > > > > > > Hi, > > > > > > > > > > > > i used > > > > open("/dev/ttyS0", O_RDONLY) > > > > method. but i am not able to receive the signals. > > > > But if my serial mouse is connected, i can read from > > > > ttyS0. > > > > is there any other method > > > > > > You can use inb, outb combination to read and write > > > from the serial port. I think that will give you more > > > control over the port. The below link might give you > > > some idea. > > > > > > http://linuxgazette.net/issue99/misc/pramode/recv.txt > > > > > > > > > > proper device driver for > > > > the serial port. > > > > Plz help me. Its urgent > > > > > _______________________________________________ > > > > Mailinglist mailing list > > > > > _______________________________________________ > Mailinglist mailing list > Mailinglist at ilug-cochin.org > http://ilug-cochin.org/mailman/listinfo/mailinglist_ilug-cochin.org > > ------------------------------ > Yahoo! Mail > Use > Photomail<http://pa.yahoo.com/*http://us.rd.yahoo.com/evt=38867/*http://photomail.mail.yahoo.com>to > share photos without annoying attachments. > > > _______________________________________________ > Mailinglist mailing list > Mailinglist at ilug-cochin.org > http://ilug-cochin.org/mailman/listinfo/mailinglist_ilug-cochin.org > > > -------------- next part -------------- An HTML attachment was scrubbed... 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