linux4media l4m132c
usb colour display module

disclaimer / info:

DISCLAIMER:
THIS IS EXPERIMENTAL SOFTWARE AND HARDWARE. USE AT YOUR OWN RISK. THE MAINTAINER(S) OF THESE PAGES AND THE DEVELOPER(S) OF SOFTWARE AND HARDWARE PRESENTED ON THESE PAGES CAN NOT BE HELD LIABLE UNDER ANY CIRCUMSTANCES FOR DAMAGE TO HARDWARE OR SOFTWARE, LOST DATA, OR OTHER DIRECT OR INDIRECT DAMAGE RESULTING FROM THE USE OF THIS SOFTWARE OR HARDWARE. IF YOU DO NOT AGREE TO THESE CONDITIONS, YOU ARE NOT PERMITTED TO USE OR FURTHER DISTRIBUTE THIS SOFTWARE OR TO USE ANY TEMPLATES FOR BUILDING HARDWARE PRESENTED HERE.

• this page deals with connecting a linux4media l4m132c usb colour display module to an usb port and drive it using serdisplib
• i'm not responsible for the content of external web pages
• external web pages will generally open in separate browser windows or tabs
• english is not my native language. please keep that in mind (corrections of english grammar and formulations are very welcome!)
• email: mrwastl at users.sourceforge.net

linux4media l4m132c usb colour display module:

old hardware page

description

l4m132c usb display modules are developed by www.digitaldevices.de.

the package that was sent to me contained the following items: display module (132x65, 64k colours) with USB module RTC (real-time clock) on board IR sensor + RUWIDO keyboard+mouse remote control the USB module can be extended to support the following features: input and output ports, both analogue or digital pin-head to connect a PSoC programmer for firmware upgrading the USB module registers with three USB interfaces when connected to a UNIX system: two interfaces receive keyboard and mouse HID-sequences the remaining interface is used for controlling the display (through ioctl-calls or libusb) both mouse and keyboard functionality, in combination with the RUWIDO remote control, worked just fine out of the box without the need of additional configuration (tested on linux-systems).   L4M132C display module, IR sensor, RUWIDO remote control

some images

test image generated by testserdisp	rgb test-pattern
coloured test-pattern with numbers	test-pattern with animated bar

connecting an L4M132C USB display module:

intro

ioctl HID (provided by the linux kernel)

• the display-part of the USB module is assigned to the HID support of the operating system and can be controlled using ioctl-calls
• the device name that is assigned to the display interface is /dev/hiddevX or /dev/usb/hiddevX.
• using udev or hotplug, permissions can be assigned to the device to give access to non-root users

nota bene

on some distributions, /dev/usb/hiddev0 is used instead of /dev/hiddev0
'HID:' can be omitted if the devicename starts with /dev/hiddev or /dev/usb/hiddev.

examples

configuration in lcd4linux

 Display SerDispLib {
   Driver 'serdisplib'
   Port 'HID:/dev/hiddev0'
   Model 'L4M132C'
 } 

configuration in graphlcd

 [serdisp]
 Driver=serdisp
 Device=HID:/dev/hiddev0
 Controller=l4m132c

calling test program testserdisp

 testserdisp -n l4m132c -p '/dev/hiddev0'

passing options through serdisp_init():

intro

    examples:
    
      serdisp_init(sdcd, "L4M132C", "INVERT=YES");
      serdisp_init(sdcd, "L4M132C", "ROTATE=90");
    

options

ranges, aliases

links:

thanks:

history: