PIC + LCD 2x16..

[robosang]

Have you download the program into the PIC? A picture of your project will help us to help you

[takao21203]

I have some links on my web domain + working LCD code for 16F PIC (4bit mode).
There are many different ways to use these LCDs actually.
http://pic.hitechworld.org/pic-microcon ... expansion/

What is well known: Direct 8 bit mode

Also 4 bit mode seems to be common.

There is possibility to use shifting register, only for data, or also for the control signals.
74hc595 is better since you can also use it for the E line!

Some circuits even reduce the clock+data to one line only, using a RC circuit.
But it's not so good to manage I think.

There is more. The LCD has two different supplies so most of these HItachi LCDs actually can work downto 2.5 volts!
But the LCD glass needs more voltage. It's possible to drive a charge pump from the microcontroller, but
extra charge pump IC is better (lower voltage possible). They are not expensive.

Combining all these improvements, I want to drive such a LCD using 4 bit mode, a 74hc164 (need to drive reset line),
and charge pump for the LCD glass.

Some datasheet even have wrong flowchart for the 4bit mode, replying on power-on reset, but that is not guaranteed.
Actually the LCD in the photo previously was attached to a magnet-wire circuit (messy) in 8bit mode, using 2 buffers.
It stopped working correctly. So maybe it's even broken. I was not able to figure out if there is the circuit bug, or the LCD fault.

For this reason I soldered small wire pieces, from LED leads, to the LCD. If it does not work, I can cut it off quickly.
I have many row connectors but they are hard to solder using tin solder, adding small wire pieces is faster for 4 pins only.