Initial display documentation - for generic 2.4" displays

documentation/displays/wiring-guide-generic-2.4-spi.md

@@ -0,0 +1,48 @@
+# Wiring Guides for Moddable supported SPI displays
+
+Copyright 2018 Moddable Tech, Inc.  
+Revised: January 2, 2018
+
+
+## Generic 2.4" & 2.8" displays (with resistive touch)
+**Size:** 2.4" & 2.8", 320 x 240
+
+**Type:** TFT LCD
+
+**Drivers:** video [ILI9341](../../documentation/drivers/ili9341/ili9341.md), touch XPT2046
+
+**Availability:** [Generic SPI Displays on eBay] (https://www.ebay.com/sch/i.html?_odkw=spi+display+2.4&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xspi+display+2.4+touch.TRS0&_nkw=spi+display+2.4+touch&_sacat=0)
+
+**Description:** These inexpensive displays are available on eBay and other resources. Note: They are available in touch and non-touch versions which appear very similar.
+
+![Generic SPI Display](images/spi-touch-display.jpg)
+
+**Moddable Sample code:** The Piu example [Drag](../../examples/piu/drag/) is good for testing this display. The build command below includes the -d, debug flag so requries XSBug to be launched to run.
+
+```
+cd $MODDABLE/examples/piu/drag
+mcconfig -d -m -r 0 -f rgb565le -p esp screen=ili9341 touch=xpt2046  
+```
+At this time Moddable sample code does not include display SD card support.
+
+**ESP8266 Pinout:**
+
+| ILI9341 Display | ESP8266 | ESP8266 Devboard label
+| --- | --- | --- |
+| SDO / MISO | GPIO 12 | (D6) 
+| LED | 3.3V | 
+| SCK | GPIO 14 | (D5) 
+| SDI / MOSI | GPIO 13 | (D7) 
+| CS | GPIO 15 | (D8)
+| DC | GPIO 2 | (D4) 
+| RESET | 3.3V | 
+| GND | GND | 
+| VCC | 3.3V | 
+| T_DO | GPIO 12 | (D6) 
+| T_DIn | GPIO 13 | (D7) 
+| T_CLK | GPIO 14 | (D5) 
+| T_IRQ | GPIO 16 | (D0)
+| T_CS | GPIO 0 | (D3) 
+
+![Generic 2.4"-2.8" wiring illustration](images/esp-generic-2.4-display.png)
+