I recently purchased a custom CFAG from CrystalFontz, with the T6963 controller. I have run into one problem, and I'm not sure what the root of the problem may be.
We initialize all of our home addresses, modes, etc, but we still don't see anything on the screen, even if we write something to it.
We think it may be one of two things, or both:
#1)
We purchased this LCD no potentiometer on it, so we had Vee and Vo sitting as open. We figured we'd need these for contrast adjusement, so we purchased a 10k pot, hooked the wiper into Vo, and hooked the other two pins on the pot between Vee and 5V (Vee is called '-20 V, Negative Voltage, and Vo is called 'Power Supply For LCD Driver', with no value given). Is it possible that the contrast is still too dim and we're just not seeing the data?
#2)
The microcontroller we're using operates at 40Mhz. We're sure we've accounted for the delays with rise and fall time of certain bits (C/D, RD, etc), but we're still stuck.
Any suggestions anyone?
Thanks,
Shawn
We initialize all of our home addresses, modes, etc, but we still don't see anything on the screen, even if we write something to it.
We think it may be one of two things, or both:
#1)
We purchased this LCD no potentiometer on it, so we had Vee and Vo sitting as open. We figured we'd need these for contrast adjusement, so we purchased a 10k pot, hooked the wiper into Vo, and hooked the other two pins on the pot between Vee and 5V (Vee is called '-20 V, Negative Voltage, and Vo is called 'Power Supply For LCD Driver', with no value given). Is it possible that the contrast is still too dim and we're just not seeing the data?
#2)
The microcontroller we're using operates at 40Mhz. We're sure we've accounted for the delays with rise and fall time of certain bits (C/D, RD, etc), but we're still stuck.
Any suggestions anyone?
Thanks,
Shawn
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