serkan erdogan wrote: > Hii all, > > i am developing the driver background for an qtopia application running > on my DVEVM (dm355). My second embedded processor like TMS430 or any > equvalent processor will make all the required analog circuit and > time-sensitive jobs and will communicate wiht my DM355 via uart or i2c > in the device organization. This application doesn't have any standart > keyboard only have matrix type organized buttons and second mcu will > read the pressed button information and send to DM355 via a serial > protocol and inerface. Simultaneously, may be come some information from > the second processor which is not about keyborad or any character input > device. So a kernel modue must analyse the information each time it comes.
I'm not sure how much analyzing you need the kernel to do, but if you can easily separate the stream into "keyboard input" and "other", then I would make a driver for it that presents the keyboard input as a standard tty device (perhaps one that generates mostly function keys, or whatever) and another device with whatever interface is appropriate for everything else. I would then leave the interpretation of the input stream for user space applications. Fran > The problem is that i dont know the best way for perform that. The > possiblities in my head are not much and i am confised a little; > > 1- Writing a kernel module which will analyse the all data coming to > UART and for a sanal keyboard than has node such as /dev/ttySX (i know > qtopia has support for tty keyboard drivers). But now one more emulation > of concole is required for command enterance to linux. > 2- Same as the first item but implemented on i2c bus. > 3- A way for reading serial or i2c line from user-space directly and > there no need for driver. > 4- The way that i wiss you tell me which is more efficent or easy. > > As a summary i need thw best way for creating a standard character input > driver from a nonstandard input device in linux. > > I am sure there is some fault in my opinions above please please correct > me at least. If you done it before please just say the best way. I will > do my best for researcing and performing it. > > Thank for reading and valuable help. > > Serkan Erdoğan. > > > _______________________________________________ > Davinci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
