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Messages - 240glt

1
USB serial LCD backpack / Re: Newbe. Serial connection on Raspberry pi
Hi,

I managed to get it (almost) working. As long as you put the right path to the port, it works with USB also. If you run "dmesg" after you plug in your USB lcdbackpack, you will get the address. This is what i got:

[27156.008038] usb 3-1: new full-speed USB device number 2 using uhci_hcd
[27156.197120] usb 3-1: New USB device found, idVendor=04d8, idProduct=fa97
[27156.197125] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[27156.197128] usb 3-1: Product: HD44780 LCD CDC-232
[27156.197131] usb 3-1: Manufacturer: DangerousPrototypes.com
[27156.216397] cdc_acm 3-1:1.0: This device cannot do calls on its own. It is not a modem.
[27156.216435] cdc_acm 3-1:1.0: ttyACM0: USB ACM device
[27156.219225] usbcore: registered new interface driver cdc_acm
[27156.219229] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters

So I tried this parameter:
Device=/dev/ttyACM0

And that worked. But I have some problems with the backlight. Se my post in another thread: viewtopic.php?f=60&t=3675&start=15#p56975
2
USB serial LCD backpack / Re: LcdProc
Hi,

I just finished soldering a 20x4 LCD display to the LCD backpack. I connected it with USB to my Linux mint PC. I installed the LCDProc with apt-get.
I have set it up to use the MtxOrb driver, with the following settings:

Device=/dev/ttyACM0
Size=20x4
Type=lcd
Contrast=480
hasAdjustableBacklight=yes
Brightness=1000
OffBrightness=0
Speed=19200

That works, but the LCD shows some random block characters at some places. If I change the hasAdjustableBacklight to "no", then the displayed characters are correct. But then the backlight flickers with high speed.

Has anyone else experienced this? Any good ideas? :)

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