hello people. i don't know if my question should be here. please inform me if not where i can get some help. i have writen a kernel module in order to communicate with a home network through my serial port. the module work ok when i connect my pc with another pc via NULL modem cable ( i do this to test my module). but when i try to communicate with the real network i can't receive anything. in order to communicate with this network a small device is connected to my serial port as shown below _______ ____________ | | | | | my pc |-----| gateway |------ network (let's say a ligth actuator) |_______| |__________| when ever i press the light actuator it send a message A. the purpose of the gateway is to convert the package from the network to serial data,so there is a voltage conversion from 24V (in the network) to 12V for the serial hardware. The problem is that i don't receive the message A. When i use the linux serial driver i get the message so i guess that i do something wrong in my driver. As long as i have red from manuals of the serial port i haven't found anything about voltage conversion. When i connect my computer with another one ( pc 2 ) via NULL modem and send from pc 2 the message A my driver works fine so i guess that my processing on the serial stream is ok. Am i missing something about the serial hardware? i do the kernel module just to practise in kernel development as a hobbie. I can do my job with the linux serial driver but i would like to learn how to handle my computer resources by myself. thank you - To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
