Hello -
I have been running a 635 connected to a Commell LV-670 for a while now. I have not been having issues with the LCD connected via a cable routing to one of the external USB ports.
I just got around to internally cabling the LCD to the Motherboard header for USB. Now when I power up the system (running Linux CentOS 4) the LCD screen and button pad backlight flickers like crazy, to what looks like maximum backlight and contrast, then dim, then back, at random. At the same time the 4 LEDs on the left side also flicker random colors. If I run my software in this state, it seems that communications are hosed between it and the display, buttons are unresponsive and my strings are not displayed (from what I can tell between the crazy flashing).
I would suspect this is an undercurrent or handshaking issue of some sort. NOTE - this happens as soon as the usb driver is loaded in the kernel at bootup, WAY before my app even starts. Any chance this sounds like a bad internal cable? I am positive I have the pinout right according to the documentation...
If anyone has any ideas of things to try I would really appreciate it! Here is a link to the LV-670 motherboard:
http://www.commell.com.tw/Support/SBC/LV-670(S).htm#Test
Thanks!
I have been running a 635 connected to a Commell LV-670 for a while now. I have not been having issues with the LCD connected via a cable routing to one of the external USB ports.
I just got around to internally cabling the LCD to the Motherboard header for USB. Now when I power up the system (running Linux CentOS 4) the LCD screen and button pad backlight flickers like crazy, to what looks like maximum backlight and contrast, then dim, then back, at random. At the same time the 4 LEDs on the left side also flicker random colors. If I run my software in this state, it seems that communications are hosed between it and the display, buttons are unresponsive and my strings are not displayed (from what I can tell between the crazy flashing).
I would suspect this is an undercurrent or handshaking issue of some sort. NOTE - this happens as soon as the usb driver is loaded in the kernel at bootup, WAY before my app even starts. Any chance this sounds like a bad internal cable? I am positive I have the pinout right according to the documentation...
If anyone has any ideas of things to try I would really appreciate it! Here is a link to the LV-670 motherboard:
http://www.commell.com.tw/Support/SBC/LV-670(S).htm#Test
Thanks!
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