I was looking for a really thin, ready-made LCD display for use in a PICAXE 28X1 project that I am working on and I found the Eagle Tree 'PowerPanel LCD Display"
(See http://www.rc-log.co.uk/index.php?target=products&product_id=30)
It looks great for my purposes because it's only about 5mm at its thickest point. Furthermore its an I2C driven display so I assumed it would be easy to use with the PICAXE. In case you're interested the pinouts for the screen's cable are as follows:
Red = +5V
White = Gnd
Yellow = SDA
Brown = SCL
Although I have successfully made the connection to the display from a 28X1 using "hi2csetup i2cmaster,118,i2cslow,i2cword" (I can get very random digits and effects to come up) the problem I have is actually communicating properly with this little gadget.
I believe that the controller for the LCD is the PCF2119X for which the datasheet can be found here...
http://www.nxp.com/acrobat_download/datasheets/PCF2119X_4.pdf
...but I'll admit that it all seems like pretty heavy, technical stuff to me. I know it's probably asking too much but there doesn't seem to be anything to make it as simple as the Rev Ed LCD panel which is relatively straightforward to programme.
Is this normal for I2C devices? I just can't see why an LCD display needs to be complicated. If I could only find out how to clear the screen and display a few characters I'm sure I could work out the rest.
Any guidance/pointers much appreciated.
Cheers,
Nigel
(See http://www.rc-log.co.uk/index.php?target=products&product_id=30)
It looks great for my purposes because it's only about 5mm at its thickest point. Furthermore its an I2C driven display so I assumed it would be easy to use with the PICAXE. In case you're interested the pinouts for the screen's cable are as follows:
Red = +5V
White = Gnd
Yellow = SDA
Brown = SCL
Although I have successfully made the connection to the display from a 28X1 using "hi2csetup i2cmaster,118,i2cslow,i2cword" (I can get very random digits and effects to come up) the problem I have is actually communicating properly with this little gadget.
I believe that the controller for the LCD is the PCF2119X for which the datasheet can be found here...
http://www.nxp.com/acrobat_download/datasheets/PCF2119X_4.pdf
...but I'll admit that it all seems like pretty heavy, technical stuff to me. I know it's probably asking too much but there doesn't seem to be anything to make it as simple as the Rev Ed LCD panel which is relatively straightforward to programme.
Is this normal for I2C devices? I just can't see why an LCD display needs to be complicated. If I could only find out how to clear the screen and display a few characters I'm sure I could work out the rest.
Any guidance/pointers much appreciated.
Cheers,
Nigel