Matrix Orbital Corp

I'm using an Lk202-25 on an embedded platform which allows me only indirect access to the I2C bus via libary functions. The write api is something like:
int i2cWrite(byte deviceAddr, byte registerAddr, byte data);

When writing text to the lk202, the lk seems to interpret the register address as display text with the result that every time I call the write function, I actually get 2 bytes of text displayed.

I have found various descriptions of the I2C protocol that conform to the API provided on my platform (e.g. http://www.robot-electronics.co.uk/htm/ ... 2c_bus.htm).

Does anyone know how I can get the LK202 to display text with this I2C driver which wants to send an internal register address as well as the device address?

TIA,
Richard

Hello rdolf,

Thanks for the question. Since your I2C platform requires an "internal register address", would it be possible for you to send a null character that the display won't interpret as an ASCII string?

If there was a non-printing character that didn't print, I think your solution would work. Unfortunately, the LK202 behaves as described in the documentation; non-printing characters print as a space.

Richard

Would you be able to send the write command then issue a "cursor left" command...?

Thanks for your help, I have a solution working now.

Richard

Good to hear! If you have any further questions or concerns, let us know!!