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transferred ucg module documentation

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@ -411,62 +411,6 @@ Victor Brutskiy's [ESPlorer](https://github.com/4refr0nt/ESPlorer) is written in
package.loaded["ds18b20"]=nil package.loaded["ds18b20"]=nil
``` ```
####Operate a display with ucglib
Ucglib is a graphics library with support for color TFT displays.
Ucglib v1.3.3
#####SPI connection
The HSPI module is used, so certain pins are fixed:
* HSPI CLK = GPIO14
* HSPI MOSI = GPIO13
* HSPI MISO = GPIO12 (not used)
All other pins can be assigned to any available GPIO:
* CS
* D/C
* RES (optional for some displays)
Also refer to the initialization sequence eg in [GraphicsTest.lua](lua_examples/ucglib/GraphicsRest.lua):
```lua
spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, 8, 8)
```
#####Library usage
The Lua bindings for this library closely follow ucglib's object oriented C++ API. Based on the ucg class, you create an object for your display type.
ILI9341 via SPI:
```lua
cs = 8 -- GPIO15, pull-down 10k to GND
dc = 4 -- GPIO2
res = 0 -- GPIO16, RES is optional YMMV
disp = ucg.ili9341_18x240x320_hw_spi(cs, dc, res)
```
This object provides all of ucglib's methods to control the display.
Again, refer to [GraphicsTest.lua](lua_examples/ucglib/GraphicsTest.lua) to get an impression how this is achieved with Lua code. Visit the [ucglib homepage](https://github.com/olikraus/ucglib) for technical details.
#####Displays
To get access to the display constructors, add the desired entries to the display table in [app/include/ucg_config.h](app/include/ucg_config.h):
```c
#define UCG_DISPLAY_TABLE \
UCG_DISPLAY_TABLE_ENTRY(ili9341_18x240x320_hw_spi, ucg_dev_ili9341_18x240x320, ucg_ext_ili9341_18) \
UCG_DISPLAY_TABLE_ENTRY(st7735_18x128x160_hw_spi, ucg_dev_st7735_18x128x160, ucg_ext_st7735_18) \
```
#####Fonts
ucglib comes with a wide range of fonts for small displays. Since they need to be compiled into the firmware image, you'd need to include them in [app/include/ucg_config.h](app/include/ucg_config.h) and recompile. Simply add the desired fonts to the font table:
```c
#define UCG_FONT_TABLE \
UCG_FONT_TABLE_ENTRY(font_7x13B_tr) \
UCG_FONT_TABLE_ENTRY(font_helvB12_hr) \
UCG_FONT_TABLE_ENTRY(font_helvB18_hr) \
UCG_FONT_TABLE_ENTRY(font_ncenR12_tr) \
UCG_FONT_TABLE_ENTRY(font_ncenR14_hr)
```
They'll be available as `ucg.<font_name>` in Lua.
####Control a WS2812 based light strip ####Control a WS2812 based light strip
```lua ```lua
-- set the color of one LED on GPIO2 to red -- set the color of one LED on GPIO2 to red

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# ucg Module
Ucglib is a graphics library developed at [olikraus/ucglib](https://github.com/olikraus/ucglib) with support for color TFT displays. The NodeMCU firmware supports a subset of these:
- ILI9163
- ILI9341
- PCF8833
- SEPS225
- SSD1331
- SSD1351
- ST7735
This integration is based on [v1.3.3](https://github.com/olikraus/Ucglib_Arduino/releases/tag/v1.3.3).
## Overview
### SPI Connection
The HSPI module is used, so certain pins are fixed:
* HSPI CLK = GPIO14
* HSPI MOSI = GPIO13
* HSPI MISO = GPIO12 (not used)
All other pins can be assigned to any available GPIO:
* CS
* D/C
* RES (optional for some displays)
Also refer to the initialization sequence eg in [GraphicsTest.lua](https://github.com/nodemcu/nodemcu-firmware/blob/master/lua_examples/ucglib/GraphicsRest.lua):
```lua
spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, 8, 8)
```
### Library Usage
The Lua bindings for this library closely follow ucglib's object oriented C++ API. Based on the ucg class, you create an object for your display type.
ILI9341 via SPI:
```lua
cs = 8 -- GPIO15, pull-down 10k to GND
dc = 4 -- GPIO2
res = 0 -- GPIO16, RES is optional YMMV
disp = ucg.ili9341_18x240x320_hw_spi(cs, dc, res)
```
This object provides all of ucglib's methods to control the display.
Again, refer to [GraphicsTest.lua](https://github.com/nodemcu/nodemcu-firmware/blob/master/lua_examples/ucglib/GraphicsTest.lua) to get an impression how this is achieved with Lua code. Visit the [ucglib homepage](https://github.com/olikraus/ucglib) for technical details.
### Displays
o get access to the display constructors, add the desired entries to the display table in [app/include/ucg_config.h](https://github.com/nodemcu/nodemcu-firmware/blob/master/app/include/ucg_config.h):
```c
#define UCG_DISPLAY_TABLE \
UCG_DISPLAY_TABLE_ENTRY(ili9341_18x240x320_hw_spi, ucg_dev_ili9341_18x240x320, ucg_ext_ili9341_18) \
UCG_DISPLAY_TABLE_ENTRY(st7735_18x128x160_hw_spi, ucg_dev_st7735_18x128x160, ucg_ext_st7735_18) \
```
### Fonts
ucglib comes with a wide range of fonts for small displays. Since they need to be compiled into the firmware image, you'd need to include them in [app/include/ucg_config.h](https://github.com/nodemcu/nodemcu-firmware/blob/master/app/include/ucg_config.h) and recompile. Simply add the desired fonts to the font table:
```c
#define UCG_FONT_TABLE \
UCG_FONT_TABLE_ENTRY(font_7x13B_tr) \
UCG_FONT_TABLE_ENTRY(font_helvB12_hr) \
UCG_FONT_TABLE_ENTRY(font_helvB18_hr) \
UCG_FONT_TABLE_ENTRY(font_ncenR12_tr) \
UCG_FONT_TABLE_ENTRY(font_ncenR14_hr)
```
They'll be available as `ucg.<font_name>` in Lua.
## Display Drivers
Initialize a display via Hardware SPI.
- `ili9163_18x128x128_hw_spi()`
- `ili9341_18x240x320_hw_spi()`
- `pcf8833_16x132x132_hw_spi()`
- `seps225_16x128x128_univision_hw_spi()`
- `ssd1351_18x128x128_hw_spi()`
- `ssd1351_18x128x128_ft_hw_spi()`
- `ssd1331_18x96x64_univision_hw_spi()`
- `st7735_18x128x160_hw_spi()`
#### Syntax
`ucg.st7735_18x128x160_hw_spi(cs, dc, res)`
#### Parameters
- `cs`: GPIO pin for /CS.
- `dc`: GPIO pin for DC.
- `res`: GPIO pin for /RES (optional).
#### Returns
ucg display object.
#### Example
```lua
spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, spi.DATABITS_8, 0)
cs = 8 -- GPIO15, pull-down 10k to GND
dc = 4 -- GPIO2
res = 0 -- GPIO16, RES is optional YMMV
disp = ucg.st7735_18x128x160_hw_spi(cs, dc, res)
```
## Constants
`ucg.FONT_MODE_TRANSPARENT`, `ucg.FONT_MODE_SOLID`, `ucg.DRAW_UPPER_RIGHT`,
`ucg.DRAW_UPPER_LEFT`, `ucg.DRAW_LOWER_RIGHT`, `ucg.DRAW_LOWER_LEFT`, `ucg.DRAW_ALL`
`ucg.font_7x13B_tr`, ...
# ucg.disp Sub-Module
## [ucg.disp:begin()](https://github.com/olikraus/ucglib/wiki/reference#begin)
## [ucg.disp:clearScreen()](https://github.com/olikraus/ucglib/wiki/reference#clearscreen)
## [ucg.disp:draw90Line()](https://github.com/olikraus/ucglib/wiki/reference#draw90line)
## [ucg.disp:drawBox()](https://github.com/olikraus/ucglib/wiki/reference#drawbox)
## [ucg.disp:drawCircle()](https://github.com/olikraus/ucglib/wiki/reference#drawcircle)
## [ucg.disp:drawDisc()](https://github.com/olikraus/ucglib/wiki/reference#drawdisc)
## [ucg.disp:drawFrame()](https://github.com/olikraus/ucglib/wiki/reference#drawframe)
## [ucg.disp:drawGlyph()](https://github.com/olikraus/ucglib/wiki/reference#drawglyph)
## [ucg.disp:drawGradientBox()](https://github.com/olikraus/ucglib/wiki/reference#drawgradientbox)
## [ucg.disp:drawGradientLine()](https://github.com/olikraus/ucglib/wiki/reference#drawgradientline)
## [ucg.disp:drawHLine()](https://github.com/olikraus/ucglib/wiki/reference#drawhline)
## [ucg.disp:drawLine()](https://github.com/olikraus/ucglib/wiki/reference#drawline)
## [ucg.disp:drawPixel()](https://github.com/olikraus/ucglib/wiki/reference#drawpixel)
## [ucg.disp:drawRBox()](https://github.com/olikraus/ucglib/wiki/reference#drawrbox)
## [ucg.disp:drawRFrame()](https://github.com/olikraus/ucglib/wiki/reference#drawrframe)
## [ucg.disp:drawString()](https://github.com/olikraus/ucglib/wiki/reference#drawstring)
## [ucg.disp:drawTetragon()](https://github.com/olikraus/ucglib/wiki/reference#drawtetragon)
## [ucg.disp:drawTriangle()](https://github.com/olikraus/ucglib/wiki/reference#drawrtiangle)
## [ucg.disp:drawVLine()](https://github.com/olikraus/ucglib/wiki/reference#drawvline)
## [ucg.disp:getFontAscent()](https://github.com/olikraus/ucglib/wiki/reference#getfontascent)
## [ucg.disp:getFontDescent()](https://github.com/olikraus/ucglib/wiki/reference#getfontdescent)
## [ucg.disp:getHeight()](https://github.com/olikraus/ucglib/wiki/reference#getheight)
## [ucg.disp:getStrWidth()](https://github.com/olikraus/ucglib/wiki/reference#getstrwidth)
## [ucg.disp:getWidth()](https://github.com/olikraus/ucglib/wiki/reference#getwidth)
## [ucg.disp:print()](https://github.com/olikraus/ucglib/wiki/reference#print)
## [ucg.disp:setClipRange()](https://github.com/olikraus/ucglib/wiki/reference#setcliprange)
## [ucg.disp:setColor()](https://github.com/olikraus/ucglib/wiki/reference#setcolor)
## ucg.disp:setFont()
ucglib comes with a wide range of fonts for small displays. Since they need to be compiled into the firmware image, you'd need to include them in [app/include/ucg_config.h](https://github.com/nodemcu/nodemcu-firmware/blob/master/app/include/ucg_config.h) and recompile. Simply add the desired fonts to the font table:
```c
#define UCG_FONT_TABLE \
UCG_FONT_TABLE_ENTRY(font_7x13B_tr) \
UCG_FONT_TABLE_ENTRY(font_helvB12_hr) \
UCG_FONT_TABLE_ENTRY(font_helvB18_hr) \
UCG_FONT_TABLE_ENTRY(font_ncenR12_tr) \
UCG_FONT_TABLE_ENTRY(font_ncenR14_hr)
```
They'll be available as `ucg.<font_name>` in Lua.
#### Syntax
`disp:setFont(font)`
#### Parameters
- `font`: Constant to identify pre-compiled font.
#### Returns
`nil`
#### Example
```lua
disp:setFont(ucg.font_7x13B_tr)
```
#### See also
- [ucglib setFont()](https://github.com/olikraus/ucglib/wiki/reference#setfont)
## [ucg.disp:setFontMode()](https://github.com/olikraus/ucglib/wiki/reference#setfontmode)
## [ucg.disp:setFontPosBaseline()](https://github.com/olikraus/ucglib/wiki/reference#setfontposbaseline)
## [ucg.disp:setFontPosBottom()](https://github.com/olikraus/ucglib/wiki/reference#setfontposbottom)
## [ucg.disp:setFontPosCenter()](https://github.com/olikraus/ucglib/wiki/reference#setfontposcenter)
## [ucg.disp:setFontPosTop()](https://github.com/olikraus/ucglib/wiki/reference#setfontpostop)
## [ucg.disp:setMaxClipRange()](https://github.com/olikraus/ucglib/wiki/reference#setmaxcliprange)
## [ucg.disp:setPrintDir()](https://github.com/olikraus/ucglib/wiki/reference#setprintdir)
## [ucg.disp:setPrintPos()](https://github.com/olikraus/ucglib/wiki/reference#setprintpos)
## [ucg.disp:setRotate90()](https://github.com/olikraus/ucglib/wiki/reference#setrotate90)
## [ucg.disp:setRotate180()](https://github.com/olikraus/ucglib/wiki/reference#setrotate180)
## [ucg.disp:setRotate270()](https://github.com/olikraus/ucglib/wiki/reference#setrotate270)
## [ucg.disp:setScale2x2()](https://github.com/olikraus/ucglib/wiki/reference#setscale2x2)
## [ucg.disp:undoClipRange()](https://github.com/olikraus/ucglib/wiki/reference#undocliprange)
## [ucg.disp:undoRotate()](https://github.com/olikraus/ucglib/wiki/reference#undorotate)
## [ucg.disp:undoScale()](https://github.com/olikraus/ucglib/wiki/reference#undoscale)