Parallax is unable to take sales calls on Thursday, October 21, 2021. Voice mail and email messages will be answered on Friday, October 22, 2021. We thank you for your understanding and look forward to assisting you on Friday.
Parallax is unable to take sales calls on Thursday, October 21, 2021. Voice mail and email messages will be answered on Friday, October 22, 2021. We thank you for your understanding and look forward to assisting you on Friday.
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 with yellow or blue backlight, was extensively demonstrated in the Propeller 2 Live Forum: Spin2 for Beginners Series with JonnyMac. The YouTube video demonstrating the code is linked under Additional Resources.
Three programs are included in this Quick Byte:
The 02_jm_lcd_pcf8574_demo.spin2 and jm_lcd_pcf8574.spin objects are a complete, documented examples with all of the methods to display text and decimals, position the cursor, control the backlight, etc.
Love these and the whole Quick Byte idea! I reminds me of the Tiny Tutorials, but it is even more compact and easy to digest anytime!
so no problem with 3.3 v P2 I/O and 5V i2c lcd ?
The I2C LCD communicates reliably with the P2 at 3.3V logic levels.