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Adafruit LCD SPI backpack

Posted by saltyseabastard 
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saltyseabastard
Adafruit LCD SPI backpack
November 23, 2019 03:56PM
Hey all, I've got the Adafruit 1602 LCD with i2C/SPI backpack, wondering how to connect it to the Ramps 1.4. Does anyone have any suggestions?
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Dust
Re: Adafruit LCD SPI backpack
November 23, 2019 07:45PM
Under marlin or just as an arduino project?

In marlin you need to enable the experimental i2c in configuration_adv.h

and you need to enable LCD_I2C_TYPE_MCP23008 in Configuration.h
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saltyseabastard
Re: Adafruit LCD SPI backpack
November 24, 2019 10:59AM
Sweet! Any idea where I wire up the pins? There are only 5, haven’t found a diagram online.
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Dust
Re: Adafruit LCD SPI backpack
November 24, 2019 06:45PM
to the i2c port of course!



The pins are from top to bottom

SCL
SDA
GND
+5v

The ramps is fully documented here [reprap.org]

Edited 1 time(s). Last edit at 11/24/2019 06:46PM by Dust.
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saltyseabastard
Re: Adafruit LCD SPI backpack
November 25, 2019 07:56AM
It’s so simple... the files are IN the computer!

Thanks for pointing this out, I’ve been staring at this diagram for days and completely missed this.
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saltyseabastard
Re: Adafruit LCD SPI backpack
November 26, 2019 11:03AM
Quote
Dust
Under marlin or just as an arduino project?

In marlin you need to enable the experimental i2c in configuration_adv.h

and you need to enable LCD_I2C_TYPE_MCP23008 in Configuration.h

I don't have LCD_I2C_TYPE_MCP23008 in my version (1.1), do I need 2.0 for that?
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Dust
Re: Adafruit LCD SPI backpack
November 26, 2019 06:21PM
Its in 1.1.9 also..

It was added in Feb 28 02:04:51 2013
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