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RPi2 PCF8754 I2C LCD 16x2 #5

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seanshpark opened this issue Mar 15, 2017 · 2 comments
Open

RPi2 PCF8754 I2C LCD 16x2 #5

seanshpark opened this issue Mar 15, 2017 · 2 comments

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@seanshpark
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seanshpark commented Mar 15, 2017 •
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With Raspberry Pi 2 or 3

  • Running Ubuntu Mate 16.04

Control LCD 1602 module

Through PCF8754A I2C to 8-bit I/O expander
@seanshpark
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Enable I2C

  • edit /boot/confit.txt and enable I2C items and reboot
  • should see /dev/i2c-0 and /dev/i2c-1
  • check with i2cdetect program
$ i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 3f
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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@seanshpark
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seanshpark commented Mar 16, 2017 •
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I2C level shifter

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@seanshpark