Has anyone played around with LCD character displays under Linux, perhaps with something like LCDProc? (I'm talking 2x24 character and the like, not LCD display panels)
If so, any recommendations on serial LCDs? I've been playing with Hitachi 44780 displays and microcontrollers lately, but it's a parallel display and LCDProc's interfaces to it are through parallel ports. There are several serial LCD products out there, and I'm trying to weigh the work of building a serial interface to it vs just buying a serial LCD.
For those that have no idea what I'm talking about, this would let you display things like load average and memory utilization on the front of a headless computer. Throw in some switches, and you can safely power down a box without having to ssh in or fiddle with KVMs. Cobalts have them, you can even fiddle with IP addresses from the front panel.
Tx,
Sean
This might be the completely wrong approach but I believe 2 x 24 serial LCD displays are the same standard size used for Point Of Sale to display product and price info to customers at the checkout.
My understanding is there are Linux based POS terminals which support these display devices so my thought is you might find more information about driving them by searching around point of sale.
www.javapos.com is where the Java drivers for these devices are defined. Its been a few years since I did work in this area so I don't know if this is going to be helpful or not.
Regards,
John Lange
On Sun, 2003-12-28 at 20:02, Sean A. Walberg wrote:
Has anyone played around with LCD character displays under Linux, perhaps with something like LCDProc? (I'm talking 2x24 character and the like, not LCD display panels)
If so, any recommendations on serial LCDs? I've been playing with Hitachi 44780 displays and microcontrollers lately, but it's a parallel display and LCDProc's interfaces to it are through parallel ports. There are several serial LCD products out there, and I'm trying to weigh the work of building a serial interface to it vs just buying a serial LCD.
For those that have no idea what I'm talking about, this would let you display things like load average and memory utilization on the front of a headless computer. Throw in some switches, and you can safely power down a box without having to ssh in or fiddle with KVMs. Cobalts have them, you can even fiddle with IP addresses from the front panel.
Tx,
Sean
Talking about LCDProc reminded me of the Winnipegger who used it to display Winnipeg Transit bus times.
http://members.shaw.ca/rosensto/bus/
John Lange wrote:
This might be the completely wrong approach but I believe 2 x 24 serial LCD displays are the same standard size used for Point Of Sale to display product and price info to customers at the checkout.
My understanding is there are Linux based POS terminals which support these display devices so my thought is you might find more information about driving them by searching around point of sale.
www.javapos.com is where the Java drivers for these devices are defined. Its been a few years since I did work in this area so I don't know if this is going to be helpful or not.
Regards,
John Lange
On Sun, 2003-12-28 at 20:02, Sean A. Walberg wrote:
Has anyone played around with LCD character displays under Linux, perhaps with something like LCDProc? (I'm talking 2x24 character and the like, not LCD display panels)
If so, any recommendations on serial LCDs? I've been playing with Hitachi 44780 displays and microcontrollers lately, but it's a parallel display and LCDProc's interfaces to it are through parallel ports. There are several serial LCD products out there, and I'm trying to weigh the work of building a serial interface to it vs just buying a serial LCD.
For those that have no idea what I'm talking about, this would let you display things like load average and memory utilization on the front of a headless computer. Throw in some switches, and you can safely power down a box without having to ssh in or fiddle with KVMs. Cobalts have them, you can even fiddle with IP addresses from the front panel.
Tx,
Sean
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