You don’t want to be scratching your head wondering why bits appear to occasionally flip unexpectedly. Tuftec Full Member Posts: Using the RT kernel is a little messier but it all seems to work. If one is not included in the kernel or as a module, you need to write one. The switches will be part of the HMI to allow control of the relays and software functions without the need of issuing commands on the computer’s console. That is what device drivers are for.
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July 08, You of course need to know a little about your hardware and how to drive it.
The driver would basically v1t211. You don’t want to be scratching your head wondering why bits appear to occasionally flip unexpectedly. If you are happy to use the standard kernel and not that concerned about running as root then the code is reasonably straightforward.
Home Help Login Register. The choice for the directory and file names are up to you, I just made these up vka the description.
Language translations now possible! You should also take a peek at vt If one is not included in the kernel or as a module, you need to write one.
SpeedFan’s info about VIA VT
If you are not too concerned about Linux correctness and you just need to get soething going in a hurry, you can write directly to the machine hardware. Tuftec Full Member Posts: So, this is a series of things that much be accomplished, however, what are some pointers for programming the VT to accept and perform commands as they are entered in to the CLI?
You need to have su root permissions.
Second is to de-bounce your switches iva you don’t get relay chatter. I’m looking for a few pointers and here is what I’m wanting to do in a nutshell: Please login or register. Did you miss your activation email? Do NOT try to de-bounce the switches by hanging capacitors across the contacts, and make sure your pullup resistors are returned to the same voltage the IO chip is running at.
The LEDs are going to be used for display purposes; to show whether a mechanical device is supposed to be running or not, show stop or run of a mechanical or software process, etc.
Making use of GPIO pins on VIA VT inside a HP T
One more thing, be sure to use isolation resistors between the output port and your relay drivers. Greetings all, I’m new to hardware programming. That is what device drivers are for. Vt12111 will need the compiletc extension in order to compile the driver.
VIA drivers for chipset, IrDA and card reader and Microsoft Windows
Using the RT kernel is a little messier but it all seems to work. If you search on line there are some basic tutorials on writing kernel modules out there.
The switches will be part of the HMI to allow control of the relays and software functions without the need of issuing commands on the computer’s console. The sleep command serves two purposes, first is so that it does not use excessive CPU time.