Hi All, I have been working on the feasibility of having multiple device nodes(serial type device) for a single device so that applications can treat each of these device nodes as separate devices. 1. Can i write a tty driver which creates multiple nodes(i will set minors to the number of nodes i need) 2. Now, If I write from user space on any of these nodes i have seen that it comes to the tty drivers write call. 3. I want to know how do i link my physical driver with this tty driver? 4. If mutiple applications are waiting on read on different nodes, how do i wake up a particular read based on the incoming data from hardware(on Rx interrupt)? please help. Thanks & Regards, -- Srinivas R srinivasramana wrote: > > Hi, > > Thanks for the response. I have explored the option of FIFOs, but the > issue is I need Full duplex support from the devices. In that case I will > have to use two FIFOs for each device. So, it would be good to know if > there is any better option. > > Also, I was thinking of multiple virtual device nodes with single UART. > But, I want to know how do I have these layers communicate? multiple > virtual ttys with single UART work? > Please suggest. > > Thanks & Regards, > -- Srinivas R > > > matthias-44 wrote: >> >> Hi, >> >> Why you don't put everything in user space. So you just need the >> driver to communicate with your UART port. >> Use pipes for communication between your applications and the >> UART-controller-application in user space. >> >> regards, >> Matthias >> >> 2009/7/19 srinivas ramana <srinivas.ramana@xxxxxxxxx>: >>> Hi All, >>> >>> I have a UART port on my device. A micro controller which drives >>> multiple >>> other devices is connected to this UART port. >>> I need all those devices, connected to micro controller, to be visible >>> to >>> Linux applications as separate UART devices/ports. >>> >>> What is the best way to do this? What all driver layers i need to >>> add/modify. Please help. >>> Thanks in advance. >>> >>> Note: assume there is a protocol between micro controller & Linux to >>> understand which device is requesting service. >>> >>> Thanks & Regards, >>> -- Srinivas R >>> >> >> >> >> -- >> motzblog.wordpress.com >> >> -- >> To unsubscribe from this list: send an email with >> "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx >> Please read the FAQ at http://kernelnewbies.org/FAQ >> >> >> > > -- View this message in context: http://www.nabble.com/Single-UART-handling-multiple-devices.-tp24554623p24957605.html Sent from the kernelnewbies mailing list archive at Nabble.com. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
