- Wed Apr 21, 2010 7:45 pm
#99075
I have the Arduino (whatever), the 328 chip on a board from SparkFun. It works well with the Ethernet shield, but I have not been able to make it work with the color LCD shield.
No matter if built for Epson or Phillips controllers, the LCD remains a dim purple blue. The DC-DC converter is working, so I have backlight voltage.
I've watched the CS, Reset, Data Out, and CLK pins on an oscilloscope, and all looks fine -- 9 bit write cycles with CS low.
I tried reversing the sense of the CLK, since one spec seemed to have a positive clock whereas the native code from SparkFun uses a negative clock. No difference.
Do I assume the LCD is defective and return it?
What else should I try?
-- Carl
No matter if built for Epson or Phillips controllers, the LCD remains a dim purple blue. The DC-DC converter is working, so I have backlight voltage.
I've watched the CS, Reset, Data Out, and CLK pins on an oscilloscope, and all looks fine -- 9 bit write cycles with CS low.
I tried reversing the sense of the CLK, since one spec seemed to have a positive clock whereas the native code from SparkFun uses a negative clock. No difference.
Do I assume the LCD is defective and return it?
What else should I try?
-- Carl