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universal-panel-adapter

Using a cheap Arduino mini pro, uno or nano this sketch allows you to interface a panel like Viki or a Parallel LCD with encoder via SPI.

Specifically used for running I2C and parallel panels on a Smoothie compatible board.

Prebuild bianries ready for upload to arduino are:-

  • viki_panel_adapter.hex for viki/panelolu2
  • parallel_panel_adapter.hex for parallel LCD

Default Wiring is as follows:-

Viki to Nano

SDA  -> A4
SCL  -> A5
ENCA -> D2
ENCB -> D3
Gnd  -> Gnd
+5v  -> +5v

Parallel LCD pin to Nano

 4 RS -> D9
 5 RW -> A0
 6 EN -> A1
11 D4 -> D5
12 D5 -> D6
13 D6 -> D7
14 D7 -> D8

 1 gnd
 2 +5v
 3 contrast
 15,16 backlight power (on some)
 
Encoder is connected to Nano
ENCA  -> D2
ENCB  -> D3
Click -> A2

Smoothie to Nano

MOSI -> D11 : 0.18
MISO -> D12 : 0.17
SCK  -> D13 : 0.15
SS   -> D10 : 0.16
BUSY -> D4  : 2.11 (or 1.30 on Azteeg X5) (And set panel.busy_pin in config to that pin)

Smoothie config

add this to your config file on smoothie

panel.enable                                true              # enable panel
panel.lcd                                   universal_adapter #
panel.spi_channel                           0                 # spi channel to use (0- MISO 0.17, MOSI 0.18, SCK 0.15, SS 0.16)
panel.spi_cs_pin                            0.16              # spi chip select
panel.busy_pin                              2.11              # busy pin NOTE 1.30 on Azteeg X5

Requirements

For compiling the following Arduino libraries are needed

For Viki and I2C based panels

For Parallel panels

About

An arduino based adapter to drive a 20x4 line parallel or i2c panel from smoothieware

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