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P2 Quick Byte: PCF8574 I2C LCD Demo — Parallax Forums

P2 Quick Byte: PCF8574 I2C LCD Demo

Ken GraceyKen Gracey Posts: 7,415
in Propeller 2

PCF8574 I2C LCD Demo - Parallax

https://www.parallax.com/pcf8574-i2c-lcd-demo/
The PCF8574 I2C LCD uses just two lines to interface: SDA (serial data) and SCL (serial clock), plus 5VDC and Vss. This LCD, which is available from Parallax

This one is truly self-documenting.

You may have already seen it in the Spin2 for Beginners Series around the holidays. Now, you can find all of the assets in one place.

Ken Gracey

Comments

  • JonnyMacJonnyMac Posts: 9,357

    When possible, I suggest using different color wires for the SCL and SDA lines -- this makes troubles-shooting connections a littler easier.

    I recommend

    -- White for SCL

    -- Yellow for SDA

  • Ken GraceyKen Gracey Posts: 7,415

    @JonnyMac said:
    When possible, I suggest using different color wires for the SCL and SDA lines -- this makes troubles-shooting connections a littler easier.
    I recommend
    -- White for SCL
    -- Yellow for SDA

    I was really hoping you wouldn't notice. When I ran short of white M/F wires I got a bit nervous while I was taking the picture, knowing you wouldn't miss that detail :)

    Ken Gracey

  • jorikejorike Posts: 14

    I wanted to confirm that the "jm_lcd_pcf8574.spin2" is the code to use to interface with the 16x2 I2C LCD Display Module? Also is there P1 code for the 16x2 I2C LCD Display Module and where can I find it?

  • JonnyMacJonnyMac Posts: 9,357

    I put the P1 version in the P1 section of the forum.

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