Matrix Orbital Corp

Hi there!

Is there an example on how to send a string or even a character to the LCD using I2C? I've got my hardware set up with the pull-up resistors as specified, but I'm clueless about the software issue involved..I'm not a programmer and reading the I2c stuff confuses the heck out of me

So far I got this:

#define W_addr 0x50; //lsb is to write to LCD
void writeI2C1(int W_addr,int data)
{
startI2C1(); //starts I2C
putI2C1(W_addr); //writes address 0x50;
putI2C1(data); // if data is 65 (A in ascii)...will it print A?
stopI2C1();
}

Is this right to send one byte or one character?
also, I don't use the keypad, so do I need to worry about reading?
Thanks

Hello,

Thank you for posting on the forum.

Looks like you are on the right direction. What you might want to do next is to hook up a scope and see if you have the right waveforms showing on the SCL and SDA lines.

Here's a couple of examples from the forum:
http://lcdforums.com/forums/viewtopic.p ... 1e1e#17470
http://lcdforums.com/forums/viewtopic.p ... 2c&start=0

Also, please visit this app note section on I2C.

Hope these help.

Thanks and Best Regards,