Hi,
I'm trying to controll an I2c lcd display that was salvaged from an old CD player.
It has an I2C chip that drives the display. My problem is that I dont know what address it is using and what functions I can do with it.
The chip is a PCF8566. I have the datasheet but it doesnt say what the address is and how to send commands to it.
Can any one help? I am new to I2C.
I have the datasheet but it doesnt say what the address is and how to send commands to it.
The data sheet found here does:-
the address is 0x3F, this is shown in FIG 15 on page 20. Also the other commands are shown.
Use the Wire library to send commands to it.
cheers grumpy will have a go and see what i get out of it.
still cant get it to go. Tried the lcd i2c library and that didnt work. Also tried writing i2c commands to it and it does nothing.
Are you sure that address is correct? Could you possibly write me a hello world example please?
Why don't you post the code you've tried?
In addition to the code we also need to see a schematic of how you have wired it up, to check you are not missing any signals and to see what address you are using.
What sort of LCD display are you driving?
When you say nothing from it I assume you mean nothing from the LCD, do the multiplex lines change as you write to it? You will need a scope to see this.