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GNU GENERAL PUBLIC LICENSE
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#
# Copyright (C) 2020 Nate Ding
#
# This is free software, licensed under the GUN General Public License v3.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
LUCI_Title:=LuCI support for ssd1306 0.91\' 138x32 display
LUCI_DEPENDS:=+i2c-tools +coreutils-nohup +libuci
LUCI_PKGARCH:=all
PKG_LICENSE:=GPLv3
PKG_LINCESE_FILES:=LICENSE
PKF_MAINTAINER:=natelol <natelol@github.com>
include $(TOPDIR)/feeds/luci/luci.mk
# call BuildPackage - OpenWrt buildroot signature

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# luci-app-oled
This is the LuCI app written for openwrt (**tested ~~only~~ on NanoPi R2S**) which supports ssd 1306 0.91' oled display.
**Raspberry Pi CM4**
This has been tested on Raspberry Pi CM4 as described in issue [#10](https://github.com/NateLol/luci-app-oled/issues/10#issuecomment-922245476).
You can find what revisions you need to make to have it work on your device.
Enjoy!
## Features|功能
---
### Dispaly Info|显示信息
**0. Enable|开启**
开启oled显示。
**1. Autoswitch|定时开关**
由于夜间oled的显示屏太亮，并且也几乎不会看它，所以应邀提供定时开关的功能，选中autoswitch之后，可以设置**显示**的起始和结束时间。
**2. Time|时间**
显示时间。
**3. IP|IP地址**
显示LAN口的IP地址，记得LAN口不可以去除**桥接**选项，否则失效。由于使用的是`br-lan`，因为不同固件可能会交换`eth0`和`eth1`。
**4. CPU Temp|CPU温度**
显示CPU温度。
**5. CPU Freq|CPU频率**
显示实时CPU频率
**6. Network Speed|网速**
提供不同接口的选择，`eth0`和`eth1`,个人可以按需修改。网速单位基准为字节(Byte)而不是一般的位（bit），[MB/s, KB/s, B/s]这样显示的数字能够比较小，不至于过长。
**7. Display Interval|显示间隔**
为了延缓oled的光衰，提供屏保服务，每隔设定的时间运行一次屏保程序。
---
### Screensavers|屏保
屏保提供不同的选择，默认推荐的是`Scroll Text|文字滚动`，其他的选择自行探索。
## Q&A
Q0. 如何使用该程序？|在那里找到luci界面？
A0. 该程序安装位置在luci界面的`services|服务`下的`OLED`，点击即可找到。
---
Q1. 是否会支持其他oled屏幕，例如同系列的0.96'的？
A1. 由于开发者身边并没有相应的屏幕去调试，所以是暂时不考虑吧。如果你想贡献代码，非常欢迎，请开PR。
---
Q2. 为什么我的IP地址显示错误？
A2. 很大原因是你修改了LAN接口的属性，例如去除了该接口的**桥接**属性。
---
Q3. 为什么我的oled不显示？
A3. 很有可能是您的固件内核驱动不完整，该程序的运行需要在内核驱动中加上**kmod-i2c-xxx**，见issue [#10](https://github.com/NateLol/luci-app-oled/issues/10)。
---
如果你在使用过程中还遇到问题，请开issue。

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luci-app-ouad/luasrc/controller/oled.lua Normal file
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module("luci.controller.oled", package.seeall)
function index()
if not nixio.fs.access("/etc/config/oled") then
return
end
entry({"admin", "services", "oled"}, alias("admin", "services", "oled", "setting"),_("OLED"), 90).dependent = true
entry({"admin", "services", "oled", "status"}, call("act_status"))
entry({"admin", "services", "oled", "setting"}, cbi("oled/setting"),_("Setting"),30).leaf = true
end
function act_status()
local e={}
e.running = luci.sys.call("pgrep -f /usr/bin/oled > /dev/null")==0
luci.http.prepare_content("application/json")
luci.http.write_json(e)
end

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luci-app-ouad/luasrc/model/cbi/oled/setting.lua Normal file
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m = Map("oled", translate("OLED"), translate("A LuCI app that helps you config your oled display (SSD1306, 0.91', 128X32) with screensavers! <br /> <br /> Any issues, please go to: ")..[[<a href="https://github.com/natelol/luci-app-oled" target="_blank">luci-app-oled</a>]])
--m.chain("luci")
m:section(SimpleSection).template="oled/status"
s = m:section(TypedSection, "oled", translate(""))
s.anonymous=true
s.addremove=false
--OPTIONS
s:tab("info", translate("Info Display"))
s:tab("screensaver", translate("screensaver"))
o = s:taboption("info", Flag, "enable", translate("Enable"))
o.default=0
o = s:taboption("info", Value, "path", translate("I2C PATH"))
o.default='/dev/i2c-0'
o = s:taboption("info", Flag, "rotate", translate("180 degree rotation"))
o.default=0
o = s:taboption("info", Flag, "autoswitch", translate("Enable Auto switch"))
o.default=0
from = s:taboption("info", ListValue, "from", translate("From"))
to = s:taboption("info", ListValue, "to", translate("To"))
for i=0,23 do
for j=0,30,30 do
from:value(i*60+j,string.format("%02d:%02d",i,j))
to:value(i*60+j,string.format("%02d:%02d",i,j))
end
end
from:value(1440,"24:00")
to:value(1440,"24:00")
from:depends("autoswitch",'1')
to:depends("autoswitch",'1')
from.default=0
to.default=1440
--informtion options----
o = s:taboption("info", Flag, "date", translate("Date"), translate('Format YYYY-MM-DD HH:MM:SS'))
o.default=0
o = s:taboption("info", Flag, "lanip", translate("IP"), translate("LAN IP address"))
o.default=0
o = s:taboption("info", Flag, "cputemp", translate("CPU temperature"))
o.default=0
o = s:taboption("info", Flag, "cpufreq", translate("CPU frequency"))
o.default=0
o = s:taboption("info", Flag, "netspeed", translate("Network speed"), translate("1Mbps(m/s)=1,000Kbps(k/s)=1,000,000bps(b/s)"))
o.default=0
o = s:taboption("info", Value, "netsource", translate("which eth to monitor"))
o:depends("netspeed",'1')
o.default='eth0'
o = s:taboption("info", Value, "time", translate("Display interval(s)"), translate('Screensaver will activate in set seconds'))
o.default=0
--screensaver options--
o = s:taboption("screensaver", Flag, "scroll", translate("Scroll Text"))
o.default=1
o = s:taboption("screensaver", Value, "text", translate("Text you want to scroll"))
o:depends("scroll",'1')
o.default='OPENWRT'
o = s:taboption("screensaver", Flag, "drawline", translate("Draw Many Lines"))
o.default=0
o = s:taboption("screensaver", Flag, "drawrect", translate("Draw Rectangles"))
o.default=0
o = s:taboption("screensaver", Flag, "fillrect", translate("Draw Multiple Rectangles"))
o.default=0
o = s:taboption("screensaver", Flag, "drawcircle", translate("Draw Multiple Circles"))
o.default=0
o = s:taboption("screensaver", Flag, "drawroundrect", translate("Draw a white circle, 10 pixel radius"))
o.default=0
o = s:taboption("screensaver", Flag, "fillroundrect", translate("Fill the Round Rectangles"))
o.default=0
o = s:taboption("screensaver", Flag, "drawtriangle", translate("Draw Triangles"))
o.default=0
o = s:taboption("screensaver", Flag, "filltriangle", translate("Fill Triangles"))
o.default=0
o = s:taboption("screensaver", Flag, "displaybitmap", translate("Display miniature bitmap"))
o.default=0
o = s:taboption("screensaver", Flag, "displayinvertnormal", translate("Invert Display Normalize it"))
o.default=0
o = s:taboption("screensaver", Flag, "drawbitmapeg", translate("Draw a bitmap and animate"))
o.default=0
return m

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<script type="text/javascript">//<![CDATA[
XHR.poll(3, '<%=url([[admin]], [[services]], [[oled]], [[status]])%>', null,
function(x, data) {
var tb = document.getElementById('oled_status');
if (data && tb) {
if (data.running) {
var links = '<em><b><font color=green>OLED <%:RUNNING%></font></b></em>';
tb.innerHTML = links;
} else {
tb.innerHTML = '<em><b><font color=red>OLED <%:NOT RUNNING%></font></b></em>';
}
}
}
);
//]]>
</script>
<style>.mar-10 {margin-left: 50px; margin-right: 10px;}</style>
<fieldset class="cbi-section">
<p id="oled_status">
<em><%:Collecting data...%></em>
</p>
</fieldset>

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msgid ""
msgstr "Content-Type: text/plain; charset=UTF-8"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:1
msgid ""
"A LuCI app that helps you config your oled display (SSD1306, 0.91', 128X32) "
"with screensavers! <br /> <br /> Any issues, please go to:"
msgstr ""
"这是一款支持在ssd1306，0.91寸，128x32像素的oled显示屏上显示你要的信息，包含屏"
"保的程序。<br /> <br />任何问题请到："
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:24
msgid "CPU frequency"
msgstr "CPU 频率"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:22
msgid "CPU temperature"
msgstr "CPU 温度"
msgid "Scroll Text"
msgstr "文字滚动"
msgid "Enable Auto switch"
msgstr "启用定时开关"
msgid "From"
msgstr "起始时间"
msgid "To"
msgstr "结束时间"
msgid "Text you want to scroll"
msgstr "你想要显示的文字"
msgid "which eth to monitor"
msgstr "选择监控哪个网口"
#: ../../package/new/luci-app-oled/luasrc/view/oled/status.htm:20
msgid "Collecting data..."
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:18
msgid "Date"
msgstr "时间"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:48
msgid "Display miniature bitmap"
msgstr "小图案"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:28
msgid "Display interval(s)"
msgstr "信息显示间隔（秒）"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:28
msgid "Screensaver will activate in set seconds"
msgstr "屏保每间隔设置的时间运行一次"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:32
msgid "Draw Many Lines"
msgstr "直线"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:38
msgid "Draw Multiple Circles"
msgstr "多圆"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:36
msgid "Draw Multiple Rectangles"
msgstr "多方块"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:34
msgid "Draw Rectangles"
msgstr "方块"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:44
msgid "Draw Triangles"
msgstr "三角形"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:54
msgid "Draw a bitmap and animate"
msgstr "动图"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:52
msgid "Draw a bitmap and animate movement"
msgstr "变化图"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:40
msgid "Draw a white circle, 10 pixel radius"
msgstr "实心圆"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:15
msgid "Enable"
msgstr "启用"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:46
msgid "Fill Triangles"
msgstr "三角填充"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:42
msgid "Fill the Round Rectangles"
msgstr "方形填充"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:18
msgid "Format YYYY-MM-DD HH:MM:SS"
msgstr "日期格式 YYYY-MM-DD HH:MM:SS"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:17
msgid "I2C PATH"
msgstr "I2C 路径"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:20
msgid "IP"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:12
msgid "Info Display"
msgstr "显示信息"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:50
msgid "Invert Display Normalize it"
msgstr "反转"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:20
msgid "LAN IP address"
msgstr "LAN 地址"
#: ../../package/new/luci-app-oled/luasrc/view/oled/status.htm:10
msgid "NOT RUNNING"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:26
msgid "Network speed"
msgstr "网速"
#: ../../package/new/luci-app-oled/luasrc/controller/oled.lua:7
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:1
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:7
msgid "OLED"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/view/oled/status.htm:7
msgid "RUNNING"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/controller/oled.lua:9
msgid "Setting"
msgstr "设置"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:13
msgid "screensaver"
msgstr "屏保"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:19
msgid "180 degree rotation"
msgstr "180 度旋转"

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msgid ""
msgstr "Content-Type: text/plain; charset=UTF-8"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:1
msgid ""
"A LuCI app that helps you config your oled display (SSD1306, 0.91', 128X32) "
"with screensavers! <br /> <br /> Any issues, please go to:"
msgstr "這是壹款支持在ssd1306，0.91寸，128x32像素的oled顯示屏上顯示妳要的信息，包含屏保的程序。<br /> <br />任何問題請到："
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:24
msgid "CPU frequency"
msgstr "CPU頻率"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:22
msgid "CPU temperature"
msgstr "CPU溫度"
msgid "Scroll Text"
msgstr "文字滾動"
msgid "Text you want to scroll"
msgstr "妳想要顯示的文字"
msgid "which eth to monitor"
msgstr "選擇監控哪個網口"
#: ../../package/new/luci-app-oled/luasrc/view/oled/status.htm:20
msgid "Collecting data..."
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:18
msgid "Date"
msgstr "時間"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:48
msgid "Display miniature bitmap"
msgstr "小圖案"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:28
msgid "Display interval(s)"
msgstr "信息顯示間隔（秒）"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:28
msgid "Screensaver will activate in set seconds"
msgstr "屏保每間隔設置的時間運行壹次"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:32
msgid "Draw Many Lines"
msgstr "直線"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:38
msgid "Draw Multiple Circles"
msgstr "多圓"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:36
msgid "Draw Multiple Rectangles"
msgstr "多方塊"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:34
msgid "Draw Rectangles"
msgstr "方塊"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:44
msgid "Draw Triangles"
msgstr "三角形"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:54
msgid "Draw a bitmap and animate"
msgstr "動圖"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:52
msgid "Draw a bitmap and animate movement"
msgstr "變化圖"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:40
msgid "Draw a white circle, 10 pixel radius"
msgstr "實心圓"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:15
msgid "Enable"
msgstr "啟用"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:46
msgid "Fill Triangles"
msgstr "三角填充"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:42
msgid "Fill the Round Rectangles"
msgstr "方形填充"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:18
msgid "Format YYYY-MM-DD HH:MM:SS"
msgstr "日期格式 YYYY-MM-DD HH:MM:SS"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:20
msgid "IP"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:12
msgid "Info Display"
msgstr "顯示信息"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:50
msgid "Invert Display Normalize it"
msgstr "反轉"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:20
msgid "LAN IP address"
msgstr "LAN地址"
#: ../../package/new/luci-app-oled/luasrc/view/oled/status.htm:10
msgid "NOT RUNNING"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:26
msgid "Network speed"
msgstr "網速"
#: ../../package/new/luci-app-oled/luasrc/controller/oled.lua:7
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:1
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:7
msgid "OLED"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/view/oled/status.htm:7
msgid "RUNNING"
msgstr ""
#: ../../package/new/luci-app-oled/luasrc/controller/oled.lua:9
msgid "Setting"
msgstr "設置"
#: ../../package/new/luci-app-oled/luasrc/model/cbi/oled/setting.lua:13
msgid "screensaver"
msgstr "屏保"

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config oled
option enable '0'
option drawline '0'
option drawrect '0'
option fillrect '0'
option drawcircle '0'
option drawroundrect '0'
option fillroundrect '0'
option drawtriangle '0'
option filltriangle '0'
option displaybitmap '0'
option displayinvertnormal '0'
option drawbitmapeg '0'
option date '1'
option netspeed '0'
option lanip '1'
option cpufreq '1'
option cputemp '1'
option time '60'
option from '0'
option to '1440'
option autoswitch '0'
option rotate '0'
option scroll '0'
option text 'OPENWRT'
option netsource 'eth0'
option path '/dev/i2c-0'

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#!/bin/sh /etc/rc.common
START=88
PROG=/usr/bin/oled
stop() {
kill -2 $(pgrep /usr/bin/oled)
kill -9 $(pgrep -f /usr/sbin/netspeed)
echo "oled exit..."
}
start() {
enabled=$(uci get oled.@oled[0].enable)
if [ $enabled -eq 0 ]; then
exit 0
fi
autoswitch=$(uci get oled.@oled[0].autoswitch)
from=$(uci get oled.@oled[0].from)
to=$(uci get oled.@oled[0].to)
if [ ${autoswitch} -eq 1 ]; then
hour=$(date +"%H")
min=$(date +"%M")
ihour=`expr $hour + 0`
imin=`expr $min + 0`
now=$(($ihour*60+$imin))
if [[ $now -lt $from || $now -gt $to ]]; then
stop
exit 0
fi
fi
#crontab daemon
if ! grep "/etc/init.d/oled \+restart" /etc/crontabs/root >/dev/null 2>&1; then
echo "*/5 * * * * /etc/init.d/oled restart >/dev/null 2>&1" >> /etc/crontabs/root
fi
date=$(uci get oled.@oled[0].date)
lanip=$(uci get oled.@oled[0].lanip)
cputemp=$(uci get oled.@oled[0].cputemp)
cpufreq=$(uci get oled.@oled[0].cpufreq)
netspeed=$(uci get oled.@oled[0].netspeed)
time=$(uci get oled.@oled[0].time)
drawline=$(uci get oled.@oled[0].drawline)
drawrect=$(uci get oled.@oled[0].drawrect)
fillrect=$(uci get oled.@oled[0].fillrect)
drawcircle=$(uci get oled.@oled[0].drawcircle)
drawroundrect=$(uci get oled.@oled[0].drawroundrect)
fillroundrect=$(uci get oled.@oled[0].fillroundrect)
drawtriangle=$(uci get oled.@oled[0].drawtriangle)
filltriangle=$(uci get oled.@oled[0].filltriangle)
displaybitmap=$(uci get oled.@oled[0].displaybitmap)
displayinvertnormal=$(uci get oled.@oled[0].displayinvertnormal)
drawbitmapeg=$(uci get oled.@oled[0].drawbitmapeg)
rotate=$(uci get oled.@oled[0].rotate)
scroll=$(uci get oled.@oled[0].scroll)
text=$(uci get oled.@oled[0].text)
netsource=$(uci get oled.@oled[0].netsource)
path=$(uci get oled.@oled[0].path)
if [ ${netspeed} -eq 1 ]; then
nohup /usr/sbin/netspeed ${netsource} >/dev/null 2>&1 &
else
kill -9 $(pgrep -f /usr/sbin/netspeed)
rm -f /tmp/netspeed
fi
nohup ${PROG} ${date} ${lanip} ${cputemp} ${cpufreq} ${netspeed} ${time} ${drawline} ${drawrect} ${fillrect} ${drawcircle} ${drawroundrect} ${fillroundrect} ${drawtriangle} ${filltriangle} ${displaybitmap} ${displayinvertnormal} ${drawbitmapeg} ${scroll} "${text}" "${netsource}" "${path}" ${rotate} 1 > /dev/null 2>&1 &
}
restart() {
enabled=$(uci get oled.@oled[0].enable)
pgrep -f ${PROG} >/dev/null
if [ $? -eq 0 ]; then
if [ $enabled -eq 1 ]; then
autoswitch=$(uci get oled.@oled[0].autoswitch)
from=$(uci get oled.@oled[0].from)
to=$(uci get oled.@oled[0].to)
if [ ${autoswitch} -eq 1 ]; then
hour=$(date +"%H")
min=$(date +"%M")
ihour=`expr $hour + 0`
imin=`expr $min + 0`
now=$(($ihour*60+$imin))
if [[ $now -lt $from || $now -gt $to ]]; then
stop
exit 0
fi
fi
date=$(uci get oled.@oled[0].date)
lanip=$(uci get oled.@oled[0].lanip)
cputemp=$(uci get oled.@oled[0].cputemp)
cpufreq=$(uci get oled.@oled[0].cpufreq)
netspeed=$(uci get oled.@oled[0].netspeed)
time=$(uci get oled.@oled[0].time)
drawline=$(uci get oled.@oled[0].drawline)
drawrect=$(uci get oled.@oled[0].drawrect)
fillrect=$(uci get oled.@oled[0].fillrect)
drawcircle=$(uci get oled.@oled[0].drawcircle)
drawroundrect=$(uci get oled.@oled[0].drawroundrect)
fillroundrect=$(uci get oled.@oled[0].fillroundrect)
drawtriangle=$(uci get oled.@oled[0].drawtriangle)
filltriangle=$(uci get oled.@oled[0].filltriangle)
displaybitmap=$(uci get oled.@oled[0].displaybitmap)
displayinvertnormal=$(uci get oled.@oled[0].displayinvertnormal)
drawbitmapeg=$(uci get oled.@oled[0].drawbitmapeg)
rotate=$(uci get oled.@oled[0].rotate)
scroll=$(uci get oled.@oled[0].scroll)
text=$(uci get oled.@oled[0].text)
netsource=$(uci get oled.@oled[0].netsource)
path=$(uci get oled.@oled[0].path)
kill -9 $(pgrep /usr/bin/oled)
kill -9 $(pgrep -f /usr/sbin/netspeed)
if [ ${netspeed} -eq 1 ]; then
nohup /usr/sbin/netspeed ${netsource} >/dev/null 2>&1 &
else
kill -9 $(pgrep -f /usr/sbin/netspeed)
rm -f /tmp/netspeed
fi
nohup ${PROG} ${date} ${lanip} ${cputemp} ${cpufreq} ${netspeed} ${time} ${drawline} ${drawrect} ${fillrect} ${drawcircle} ${drawroundrect} ${fillroundrect} ${drawtriangle} ${filltriangle} ${displaybitmap} ${displayinvertnormal} ${drawbitmapeg} ${scroll} "${text}" "${netsource}" "${path}" ${rotate} 0 > /dev/null 2>&1 &
else
stop
fi
else
if [ $enabled -eq 1 ]; then
start
else
exit 0
fi
fi
}
boot() {
start
}

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#!/bin/sh
uci_write_config() {
uci -q set oled.@oled[0].path="$1"
uci -q set oled.@oled[0].rotate="$2"
uci -q commit oled
}
. /lib/functions/system.sh
case "$(board_name)" in
hinlink,opc-h69k)
uci_write_config '/dev/i2c-5' 1
;;
esac
uci -q batch <<-EOF >/dev/null
delete ucitrack.@oled[-1]
add ucitrack oled
set ucitrack.@oled[-1].init=oled
commit ucitrack
EOF
rm -rf /tmp/luci-*
exit 0

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#!/bin/ash
IF=$1
if [ -z "$IF" ]; then
IF=`ls -1 /sys/class/net/ | head -1`
fi
RXPREV=-1
TXPREV=-1
echo "Listening $IF..."
while [ 1 == 1 ] ; do
RX=`cat /sys/class/net/${IF}/statistics/rx_bytes`
TX=`cat /sys/class/net/${IF}/statistics/tx_bytes`
if [ $RXPREV -ne -1 ] ; then
let BWRX=$RX-$RXPREV
let BWTX=$TX-$TXPREV
echo "$BWRX $BWTX">/tmp/netspeed
fi
RXPREV=$RX
TXPREV=$TX
sleep 1
done

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luci-app-ouad/root/usr/share/rpcd/acl.d/luci-app-oled.json Normal file
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{
"luci-app-oled": {
"description": "Grant UCI access for luci-app-oled",
"read": {
"uci": [ "oled" ]
},
"write": {
"uci": [ "oled" ]
}
}
}

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luci-app-ouad/src/Example_Code/Main.c Normal file
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/*
* Main.c
*
* Created on : Sep 6, 2017
* Author : Vinay Divakar
* Description : Example usage of the SSD1306 Driver API's
* Website : www.deeplyembedded.org
*/
/* Lib Includes */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
/* Header Files */
#include "I2C.h"
#include "SSD1306_OLED.h"
#include "example_app.h"
/* Oh Compiler-Please leave me as is */
volatile unsigned char flag = 0;
/* Alarm Signal Handler */
void ALARMhandler(int sig)
{
/* Set flag */
flag = 5;
}
void BreakDeal(int sig)
{
clearDisplay();
usleep(1000000);
Display();
exit(0);
}
int main(int argc, char* argv[])
{
int date=atoi(argv[1]);
int lanip=atoi(argv[2]);
int cputemp=atoi(argv[3]);
int cpufreq=atoi(argv[4]);
int netspeed=atoi(argv[5]);
int time=atoi(argv[6]);
int drawline=atoi(argv[7]);
int drawrect=atoi(argv[8]);
int fillrect=atoi(argv[9]);
int drawcircle=atoi(argv[10]);
int drawroundcircle=atoi(argv[11]);
int fillroundcircle=atoi(argv[12]);
int drawtriangle=atoi(argv[13]);
int filltriangle=atoi(argv[14]);
int displaybitmap=atoi(argv[15]);
int displayinvertnormal=atoi(argv[16]);
int drawbitmapeg=atoi(argv[17]);
int scroll=atoi(argv[18]);
char *text=argv[19];
char *eth=argv[20];
char *path=argv[21];
int rotate=atoi(argv[22]);
int needinit=atoi(argv[23]);
if(path == NULL)
path = I2C_DEV0_PATH;
/* Initialize I2C bus and connect to the I2C Device */
if(init_i2c_dev(path, SSD1306_OLED_ADDR) == 0)
{
printf("I2C: Bus Connected to SSD1306\r\n");
}
else
{
printf("I2C: OOPS! Something Went Wrong\r\n");
exit(1);
}
/* Register the Alarm Handler */
signal(SIGALRM, ALARMhandler);
signal(SIGINT, BreakDeal);
//signal(SIGTERM, BreakDeal);
/* Run SDD1306 Initialization Sequence */
if (needinit==1)
display_Init_seq();
if (rotate==1)
display_rotate();
else
display_normal();
/* Clear display */
clearDisplay();
// draw a single pixel
// drawPixel(0, 1, WHITE);
// Display();
// usleep(1000000);
// clearDisplay();
// draw many lines
while(1){
if(scroll){
testscrolltext(text);
usleep(1000000);
clearDisplay();
}
if(drawline){
testdrawline();
usleep(1000000);
clearDisplay();
}
// draw rectangles
if(drawrect){
testdrawrect();
usleep(1000000);
clearDisplay();
}
// draw multiple rectangles
if(fillrect){
testfillrect();
usleep(1000000);
clearDisplay();
}
// draw mulitple circles
if(drawcircle){
testdrawcircle();
usleep(1000000);
clearDisplay();
}
// draw a white circle, 10 pixel radius
if(drawroundcircle){
testdrawroundrect();
usleep(1000000);
clearDisplay();
}
// Fill the round rectangle
if(fillroundcircle){
testfillroundrect();
usleep(1000000);
clearDisplay();
}
// Draw triangles
if(drawtriangle){
testdrawtriangle();
usleep(1000000);
clearDisplay();
}
// Fill triangles
if(filltriangle){
testfilltriangle();
usleep(1000000);
clearDisplay();
}
// Display miniature bitmap
if(displaybitmap){
display_bitmap();
Display();
usleep(1000000);
};
// Display Inverted image and normalize it back
if(displayinvertnormal){
display_invert_normal();
clearDisplay();
usleep(1000000);
Display();
}
// Generate Signal after 20 Seconds
// draw a bitmap icon and 'animate' movement
if(drawbitmapeg){
alarm(10);
flag=0;
testdrawbitmap_eg();
clearDisplay();
usleep(1000000);
Display();
}
//setCursor(0,0);
setTextColor(WHITE);
// info display
int sum = date+lanip+cpufreq+cputemp+netspeed;
if (sum == 0) {
clearDisplay();
return 0;
}
for(int i = 1; i < time; i++){
if (sum == 1){//only one item for display
if (date) testdate(CENTER, 8);
if (lanip) testlanip(CENTER, 8);
if (cpufreq) testcpufreq(CENTER, 8);
if (cputemp) testcputemp(CENTER, 8);
if (netspeed) testnetspeed(SPLIT,0);
Display();
usleep(1000000);
clearDisplay();
}else if (sum == 2){//two items for display
if(date) {testdate(CENTER, 16*(date-1));}
if(lanip) {testlanip(CENTER, 16*(date+lanip-1));}
if(cpufreq) {testcpufreq(CENTER, 16*(date+lanip+cpufreq-1));}
if(cputemp) {testcputemp(CENTER, 16*(date+lanip+cpufreq+cputemp-1));}
if(netspeed) {testnetspeed(MERGE, 16*(date+lanip+cpufreq+cputemp+netspeed-1));}
Display();
usleep(1000000);
clearDisplay();
}else{//more than two items for display
if(date) {testdate(FULL, 8*(date-1));}
if(lanip) {testlanip(FULL, 8*(date+lanip-1));}
if(cpufreq && cputemp) {
testcpu(8*(date+lanip));
if(netspeed) {testnetspeed(FULL, 8*(date+lanip+1+netspeed-1));}
}else{
if(cpufreq) {testcpufreq(FULL, 8*(date+lanip+cpufreq-1));}
if(cputemp) {testcputemp(FULL, 8*(date+lanip+cpufreq+cputemp-1));}
if(netspeed) {testnetspeed(FULL, 8*(date+lanip+cpufreq+cputemp+netspeed-1));}
}
Display();
usleep(1000000);
clearDisplay();
}
}
}
}

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/*
* MIT License
Copyright (c) 2017 DeeplyEmbedded
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* example_app.c
*
* Created on : Sep 6, 2017
* Author : Vinay Divakar
* Website : www.deeplyembedded.org
*/
/* Lib Includes */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <signal.h>
#include <unistd.h>
#include <time.h>
#include "SSD1306_OLED.h"
#include "example_app.h"
#define BUFMAX SSD1306_LCDWIDTH*SSD1306_LCDHEIGHT
/* MACRO's */
#define LOGO16_GLCD_HEIGHT 16
#define LOGO16_GLCD_WIDTH 16
#define NUMFLAKES 10
#define XPOS 0
#define YPOS 1
#define DELTAY 2
#define TIMESIZE 64
//temperature
#define TEMPPATH "/sys/class/thermal/thermal_zone0/temp"
#define TEMPSIZE 5
//cpu
#define FREQSIZE 8
#define FREQPATH "cat /sys/devices/system/cpu/cpu[04]/cpufreq/cpuinfo_cur_freq"
//ip
#define IPPATH "ifconfig br-lan|grep 'inet addr:'|cut -d: -f2|awk '{print $1}'"
#define IPSIZE 20
//netspeed
#define NETPATH "cat /tmp/netspeed"
/* Extern volatile */
extern volatile unsigned char flag;
/* Bit Map - Taken from Adafruit SSD1306 OLED Library */
static const unsigned char logo16_glcd_bmp[] =
{
0b00000000, 0b11000000,
0b00000001, 0b11000000,
0b00000001, 0b11000000,
0b00000011, 0b11100000,
0b11110011, 0b11100000,
0b11111110, 0b11111000,
0b01111110, 0b11111111,
0b00110011, 0b10011111,
0b00011111, 0b11111100,
0b00001101, 0b01110000,
0b00011011, 0b10100000,
0b00111111, 0b11100000,
0b00111111, 0b11110000,
0b01111100, 0b11110000,
0b01110000, 0b01110000,
0b00000000, 0b00110000
};
FILE *fp;
char content_buff[BUFMAX];
char buf[BUFMAX];
int display_offset =7;
/* draw many lines */
void testdrawline()
{
short i = 0;
for (i=0; i<SSD1306_LCDWIDTH; i+=4)
{
drawLine(0, 0, i, SSD1306_LCDHEIGHT-1, WHITE);
Display();
usleep(1000);
}
for (i=0; i<SSD1306_LCDHEIGHT; i+=4)
{
drawLine(0, 0, SSD1306_LCDWIDTH-1, i, WHITE);
Display();
usleep(1000);
}
usleep(250000);
clearDisplay();
for (i=0; i<SSD1306_LCDWIDTH; i+=4)
{
drawLine(0, SSD1306_LCDHEIGHT-1, i, 0, WHITE);
Display();
usleep(1000);
}
for (i=SSD1306_LCDHEIGHT-1; i>=0; i-=4)
{
drawLine(0, SSD1306_LCDHEIGHT-1, SSD1306_LCDWIDTH-1, i, WHITE);
Display();
usleep(1000);
}
usleep(250000);
clearDisplay();
for (i=SSD1306_LCDWIDTH-1; i>=0; i-=4)
{
drawLine(SSD1306_LCDWIDTH-1, SSD1306_LCDHEIGHT-1, i, 0, WHITE);
Display();
usleep(1000);
}
for (i=SSD1306_LCDHEIGHT-1; i>=0; i-=4)
{
drawLine(SSD1306_LCDWIDTH-1, SSD1306_LCDHEIGHT-1, 0, i, WHITE);
Display();
usleep(1000);
}
usleep(250000);
clearDisplay();
for (i=0; i<SSD1306_LCDHEIGHT; i+=4)
{
drawLine(SSD1306_LCDWIDTH-1, 0, 0, i, WHITE);
Display();
usleep(1000);
}
for (i=0; i<SSD1306_LCDWIDTH; i+=4) {
drawLine(SSD1306_LCDWIDTH-1, 0, i, SSD1306_LCDHEIGHT-1, WHITE);
Display();
usleep(1000);
}
usleep(250000);
}
/* draw rectangles */
void testdrawrect()
{
short i = 0;
for (i=0; i<SSD1306_LCDHEIGHT/2; i+=2)
{
drawRect(i, i,SSD1306_LCDWIDTH-2*i, SSD1306_LCDHEIGHT-2*i, WHITE);
Display();
usleep(1000);
}
}
/* draw multiple rectangles */
void testfillrect()
{
unsigned char color = 1;
short i = 0;
for (i=0; i<SSD1306_LCDHEIGHT/2; i+=3)
{
// alternate colors
fillRect(i, i, SSD1306_LCDWIDTH-i*2, SSD1306_LCDHEIGHT-i*2, color%2);
Display();
usleep(1000);
color++;
}
}
/* draw mulitple circles */
void testdrawcircle()
{
short i = 0;
for (i=0; i<SSD1306_LCDHEIGHT; i+=2)
{
drawCircle(SSD1306_LCDWIDTH/2,SSD1306_LCDHEIGHT/2, i, WHITE);
Display();
usleep(1000);
}
}
/*draw a white circle, 10 pixel radius */
void testdrawroundrect()
{
short i = 0;
for (i=0; i<SSD1306_LCDHEIGHT/2-2; i+=2) {
drawRoundRect(i, i,SSD1306_LCDWIDTH-2*i, SSD1306_LCDHEIGHT-2*i, SSD1306_LCDHEIGHT/4, WHITE);
Display();
usleep(1000);
}
}
/* Fill the round rectangle */
void testfillroundrect()
{
short color = WHITE,i = 0;
for (i=0; i<SSD1306_LCDHEIGHT/2-2; i+=2)
{
fillRoundRect(i, i, SSD1306_LCDWIDTH-2*i, SSD1306_LCDHEIGHT-2*i, SSD1306_LCDHEIGHT/4, color);
if (color == WHITE)
color = BLACK;
else
color = WHITE;
Display();
usleep(1000);
}
}
/* Draw triangles */
void testdrawtriangle()
{
short i = 0;
for (i=0; i<MIN(SSD1306_LCDWIDTH,SSD1306_LCDHEIGHT)/2; i+=5)
{
drawTriangle(SSD1306_LCDWIDTH/2, SSD1306_LCDHEIGHT/2-i,
SSD1306_LCDWIDTH/2-i,SSD1306_LCDHEIGHT /2+i,
SSD1306_LCDWIDTH/2+i, SSD1306_LCDHEIGHT/2+i, WHITE);
Display();
usleep(1000);
}
}
/* Fill triangles */
void testfilltriangle()
{
unsigned char color = WHITE;
short i = 0;
for (i=MIN(SSD1306_LCDWIDTH,SSD1306_LCDHEIGHT)/2; i>0; i-=5)
{
fillTriangle(SSD1306_LCDWIDTH/2, SSD1306_LCDHEIGHT/2-i,
SSD1306_LCDWIDTH/2-i, SSD1306_LCDHEIGHT/2+i,
SSD1306_LCDWIDTH/2+i, SSD1306_LCDHEIGHT/2+i, WHITE);
if (color == WHITE)
color = BLACK;
else
color = WHITE;
Display();
usleep(1000);
}
}
/* Display a bunch of characters and emoticons */
void testdrawchar()
{
unsigned char i = 0;
setTextSize(1);
setTextColor(WHITE);
setCursor(0,0);
for (i=0; i < 168; i++)
{
if (i == '\n')
continue;
oled_write(i);
if ((i > 0) && (i % 21 == 0))
println();
}
Display();
usleep(1000);
}
/* Display "scroll" and scroll around */
void testscrolltext(char* str)
{
setTextSize(2);
setTextColor(WHITE);
setCursor(10,8);
sprintf(buf,"%s",str);
print_strln(buf);
Display();
usleep(1000);
startscrollright(0x00, 0x0F);
usleep(5000000);
stopscroll();
usleep(1000000);
startscrollleft(0x00, 0x0F);
usleep(5000000);
stopscroll();
usleep(1000000);
startscrolldiagright(0x00, 0x07);
usleep(5000000);
startscrolldiagleft(0x00, 0x07);
usleep(5000000);
stopscroll();
}
/* Display Texts */
void display_texts()
{
setTextSize(1);
setTextColor(WHITE);
setCursor(10,0);
print_str("HELLO FELLAS!");
println();
printFloat_ln(3.141592, 4); //Print 4 No's after the decimal Pt.
printNumber_L_ln(-1234, DEC);
printNumber_UC_ln(170, BIN);
setTextSize(2);
setTextColor(WHITE);
print_str("0x");
printNumber_UL_ln(0xDEADBEEF, HEX);
}
/* Display miniature bitmap */
void display_bitmap()
{
drawBitmap(30, 16, logo16_glcd_bmp, 16, 16, 1);
}
/* Invert Display and Normalize it */
void display_invert_normal()
{
invertDisplay(SSD1306_INVERT_DISPLAY);
usleep(1000000);
invertDisplay(SSD1306_NORMALIZE_DISPLAY);
usleep(1000000);
}
/* Draw a bitmap and 'animate' movement */
void testdrawbitmap(const unsigned char *bitmap, unsigned char w, unsigned char h)
{
unsigned char icons[NUMFLAKES][3], f = 0;
// initialize
for (f=0; f< NUMFLAKES; f++)
{
icons[f][XPOS] = rand() % SSD1306_LCDWIDTH;
icons[f][YPOS] = 0;
icons[f][DELTAY] = (rand() % 5) + 1;
/* Looks kinna ugly to me - Un-Comment if you need it */
//print_str("x: ");
//printNumber_UC(icons[f][XPOS], DEC);
//print_str("y: ");
//printNumber_UC(icons[f][YPOS], DEC);
//print_str("dy: ");
//printNumber_UC(icons[f][DELTAY], DEC);
}
while (flag != 5)
{
// draw each icon
for (f=0; f< NUMFLAKES; f++)
{
drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, WHITE);
}
Display();
usleep(200000);
// then erase it + move it
for (f=0; f< NUMFLAKES; f++)
{
drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, BLACK);
// move it
icons[f][YPOS] += icons[f][DELTAY];
// if its gone, reinit
if (icons[f][YPOS] > SSD1306_LCDHEIGHT)
{
icons[f][XPOS] = rand() % SSD1306_LCDWIDTH;
icons[f][YPOS] = 0;
icons[f][DELTAY] = (rand() % 5) + 1;
}
}
}
}
/* Draw bitmap and animate */
void testdrawbitmap_eg()
{
setTextSize(1);
setTextColor(WHITE);
setCursor(10,0);
testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);
}
/* Intro */
void deeplyembedded_credits()
{
setTextSize(1);
setTextColor(WHITE);
setCursor(1,0);
print_strln("deeplyembedded.org");
println();
print_strln("Author:Vinay Divakar");
println();
println();
print_strln("THANK YOU");
}
void testdate(int mode, int y)
{
time_t rawtime;
time_t curtime;
uint8_t timebuff[TIMESIZE];
curtime = time(NULL);
time(&rawtime);
switch (mode)
{
case CENTER:
setTextSize(2);
strftime(timebuff,80,"%H:%M",localtime(&rawtime));
sprintf(buf,"%s",timebuff);
setCursor((127-strlen(buf)*11)/2-4, y);
break;
case FULL:
setTextSize(1);
strftime(timebuff,80,"%Y-%m-%d %H:%M:%S",localtime(&rawtime));
sprintf(buf,"%s",timebuff);
setCursor(display_offset, y);
}
print_strln(buf);
}
void testlanip(int mode, int y)
{
setTextSize(1);
if((fp=popen(IPPATH,"r"))!=NULL)
{
fscanf(fp,"%s",content_buff);
fclose(fp);
//ipbuff[strlen(ipbuff)-1]=32;
switch(mode)
{
case CENTER:
setTextSize(1);
sprintf(buf,"%s",content_buff);
setCursor((127-strlen(buf)*6)/2, y+4);
break;
case FULL:
setTextSize(1);
sprintf(buf,"IP:%s",content_buff);
setCursor(display_offset, y);
}
print_strln(buf);
}
}
void testcputemp(int mode, int y)
{
if((fp=fopen(TEMPPATH,"r"))!=NULL)
{
fgets(content_buff,TEMPSIZE,fp);
fclose(fp);
switch (mode)
{
case CENTER:
setTextSize(2);
sprintf(buf, "%.2f",atoi(content_buff)/100.0);
setCursor((127-(strlen(buf)+2)*11)/2-4, y);
print_str(buf);
oled_write(0);
oled_write(67);
drawCircle(getCursorX()-16, getCursorY()+3, 2, WHITE);
break;
case FULL:
setTextSize(1);
sprintf(buf,"CPU TEMP:%.2f",atoi(content_buff)/100.0);
setCursor(display_offset, y);
print_str(buf);
oled_write(0);
oled_write(67);
drawCircle(getCursorX()-8, getCursorY()+1, 1, WHITE);
}
}
}
void testcpufreq(int mode, int y)
{
if((fp=popen(FREQPATH,"r")) != NULL)
{
fgets(content_buff,FREQSIZE,fp);
fclose(fp);
switch(mode)
{
case CENTER:
setTextSize(2);
sprintf(buf,"%4dMHz",atoi(content_buff)/1000);
setCursor((127-strlen(buf)*11)/2-4, y);
break;
case FULL:
setTextSize(1);
sprintf(buf,"CPU FREQ:%4dMHz",atoi(content_buff)/1000);
setCursor(display_offset, y);
}
print_strln(buf);
}
}
void testnetspeed(int mode, int y)
{
int rx,tx;
if((fp=popen(NETPATH,"r")) != NULL)
{
fscanf(fp,"%d %d", &rx, &tx);
fclose(fp);
rx = rx;
tx = tx;
switch(mode)
{
case SPLIT:
setTextSize(2);
if (tx < 1000) sprintf(buf, "%03dB", tx);
else if (tx > 1000000) sprintf(buf, "%03dM", tx/1000000);
else sprintf(buf, "%03dK", tx/1000);
setCursor((127-(strlen(buf)+1)*11)/2,0);
oled_write(24);
print_str(buf);
if (rx < 1000) sprintf(buf, "%03dB", rx);
else if (rx > 1000000) sprintf(buf, "%03dM", rx/1000000);
else sprintf(buf, "%03dK", rx/1000);
setCursor((127-(strlen(buf)+1)*11)/2,16);
oled_write(25);
print_str(buf);
break;
case MERGE:
setTextSize(1);
if (tx < 1000) sprintf(buf, "%03dB ", tx);
else if (tx > 1000000) sprintf(buf, "%03dM", tx/1000000);
else sprintf(buf, "%03dK ", tx/1000);
setCursor((127-(2*strlen(buf)-1)*6)/2-4, y+4);
oled_write(24);
print_str(buf);
if (rx < 1000) sprintf(buf, "%03dB", rx);
else if (rx > 1000000) sprintf(buf, "%03dM", rx/1000000);
else sprintf(buf, "%03dK", rx/1000);
oled_write(25);
print_str(buf);
break;
case FULL:
setTextSize(1);
setCursor(display_offset, y);
oled_write(24);
if (tx < 1000) sprintf(buf, "%03dB ", tx);
else if (tx > 1000000) sprintf(buf, "%03dM", tx/1000000);
else sprintf(buf, "%03dK ", tx/1000);
print_str(buf);
oled_write(25);
if (rx < 1000) sprintf(buf, "%03dB", rx);
else if (rx > 1000000) sprintf(buf, "%03dM", rx/1000000);
else sprintf(buf, "%03dK", rx/1000);
print_str(buf);
}
}
}
void testcpu(int y)
{
//freq
setTextSize(1);
setCursor(display_offset, y);
if((fp=popen(FREQPATH,"r")) != NULL)
{
fgets(content_buff,FREQSIZE,fp);
fclose(fp);
sprintf(buf,"CPU:%4dMHz ", atoi(content_buff)/1000);
print_str(buf);
}
//temp
if((fp=fopen(TEMPPATH,"r"))!=NULL)
{
fgets(content_buff,TEMPSIZE,fp);
fclose(fp);
sprintf(buf, "%.2f",atoi(content_buff)/100.0);
print_str(buf);
oled_write(0);
oled_write(67);
drawCircle(getCursorX()-8, getCursorY()+1, 1, WHITE);
}
}
void testprintinfo()
{
setTextSize(1);
setTextColor(WHITE);
setCursor(0,0);
//DATE
time_t rawtime;
time_t curtime;
uint8_t timebuff[TIMESIZE];
curtime = time(NULL);
time(&rawtime);
strftime(timebuff,80,"%Y-%m-%d_%w %H:%M:%S",localtime(&rawtime));
sprintf(buf,"%s",timebuff);
print_strln(buf);
//br-lan ip
if((fp=popen(IPPATH,"r"))!=NULL)
{
fscanf(fp,"%s",content_buff);
fclose(fp);
//ipbuff[strlen(ipbuff)-1]=32;
sprintf(buf,"IP:%s",content_buff);
print_strln(buf);
}
//CPU temp
if((fp=popen(FREQPATH,"r")) != NULL)
{
fgets(content_buff,FREQSIZE,fp);
fclose(fp);
sprintf(buf,"CPU freq:%d MHz ",atoi(content_buff)/1000);
print_strln(buf);
}
//cpu freq
if((fp=fopen(TEMPPATH,"r"))!=NULL)
{
fgets(content_buff,TEMPSIZE,fp);
fclose(fp);
sprintf(buf,"CPU temp:%.2f C",atoi(content_buff)/100.0);
print_strln(buf);
}
}

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#define CENTER 0 //single item display
#define SPLIT 1 //two items
#define MERGE 2
#define FULL 3
void testdrawline();
void testdrawrect();
void testfillrect();
void testdrawcircle();
void testdrawroundrect();
void testfillroundrect();
void testdrawtriangle();
void testfilltriangle();
void testdrawchar();
void testscrolltext(char *str);
void display_texts();
void display_bitmap();
void display_invert_normal();
void testdrawbitmap(const unsigned char *bitmap, unsigned char w, unsigned char h);
void testdrawbitmap_eg();
void deeplyembedded_credits();
void testprintinfo();
void testdate(int mode, int y);
void testlanip(int mode, int y);
void testcpufreq(int mode, int y);
void testcputemp(int mode, int y);
void testnetspeed(int mode, int y);
void testcpu(int y);

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/*
* MIT License
Copyright (c) 2017 DeeplyEmbedded
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* I2C.c
*
* Created on : September 19, 2017
* Author : Vinay Divakar
* Description : This is an I2C Library for the BeagleBone that consists of the API's to support the standard
* I2C operations.
* Website : www.deeplyembedded.org
*/
/*Libs Includes*/
#include<stdio.h>
#include<fcntl.h>
#include<sys/ioctl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
// heuristic to guess what version of i2c-dev.h we have:
// the one installed with `apt-get install libi2c-dev`
// would conflict with linux/i2c.h, while the stock
// one requires linus/i2c.h
#ifndef I2C_SMBUS_BLOCK_MAX
// If this is not defined, we have the "stock" i2c-dev.h
// so we include linux/i2c.h
#include <linux/i2c.h>
typedef unsigned char i2c_char_t;
#else
typedef char i2c_char_t;
#endif
/* Header Files */
#include "I2C.h"
/* Exposed objects for i2c-x */
I2C_DeviceT I2C_DEV_2;
/****************************************************************
* Function Name : Open_device
* Description : Opens the I2C device to use
* Returns : 0 on success, -1 on failure
* Params @i2c_dev_path: Path to the I2C device
* @fd: Variable to store the file handler
****************************************************************/
int Open_device(char *i2c_dev_path, int *fd)
{
if((*fd = open(i2c_dev_path, O_RDWR))<0)
return -1;
else
return 0;
}
/****************************************************************
* Function Name : Close_device
* Description : Closes the I2C device in use
* Returns : 0 on success, -1 on failure
* Params : @fd: file descriptor
****************************************************************/
int Close_device(int fd)
{
if(close(fd) == -1)
return -1;
else
return 0;
}
/****************************************************************
* Function Name : Set_slave_addr
* Description : Connect to the Slave device
* Returns : 0 on success, -1 on failure
* Params @fd: File descriptor
* @slave_addr: Address of the slave device to
* talk to.
****************************************************************/
int Set_slave_addr(int fd, unsigned char slave_addr)
{
if(ioctl(fd, I2C_SLAVE, slave_addr) < 0)
return -1;
else
return 0;
}
/****************************************************************
* Function Name : i2c_write
* Description : Write a byte on SDA
* Returns : No. of bytes written on success, -1 on failure
* Params @fd: File descriptor
* @data: data to write on SDA
****************************************************************/
int i2c_write(int fd, unsigned char data)
{
int ret = 0;
ret = write(fd, &data, I2C_ONE_BYTE);
if((ret == -1) || (ret != 1))
return -1;
else
return(ret);
}
/****************************************************************
* Function Name : i2c_read
* Description : Read a byte on SDA
* Returns : No. of bytes read on success, -1 on failure
* Params @fd: File descriptor
* @read_data: Points to the variable that stores
* the read data byte
****************************************************************/
int i2c_read(int fd, unsigned char *read_data)
{
int ret = 0;
ret = read(fd, &read_data, I2C_ONE_BYTE);
if(ret == -1)
perror("I2C: Failed to read |");
if(ret == 0)
perror("I2C: End of FILE |");
return(ret);
}
/****************************************************************
* Function Name : i2c_read_register
* Description : Read a single register of the slave device
* Returns : No. of bytes read on success, -1 on failure
* Params @fd: File descriptor
* @read_addr: Register address to be read
* @read_data: Points to the variable that stores
* the read data byte
****************************************************************/
int i2c_read_register(int fd, unsigned char read_addr, unsigned char *read_data)
{
int ret = 0;
if(i2c_write(fd, read_addr) == -1)
{
perror("I2C: Failed to write |");
return -1;
}
ret = read(fd, &read_data, I2C_ONE_BYTE);
if(ret == -1)
perror("I2C: Failed to read |");
if(ret == 0)
perror("I2C: End of FILE |");
return(ret);
}
/****************************************************************
* Function Name : i2c_read_registers
* Description : Read a multiple registers on the slave device
* from starting address
* Returns : No. of bytes read on success, -1 on failure
* Params @fd: File descriptor
* @num: Number of registers/bytes to read from.
* @starting_addr: Starting address to read from
* @buff_Ptr: Buffer to store the read bytes
****************************************************************/
int i2c_read_registers(int fd, int num, unsigned char starting_addr,
unsigned char *buff_Ptr)
{
int ret = 0;
if(i2c_write(fd, starting_addr) == -1)
{
perror("I2C: Failed to write |");
return -1;
}
ret = read(fd, buff_Ptr, num);
if(ret == -1)
perror("I2C: Failed to read |");
if(ret == 0)
perror("I2C: End of FILE |");
return(ret);
}
/****************************************************************
* Function Name : i2c_multiple_writes
* Description : Write multiple bytes on SDA
* Returns : No. of bytes written on success, -1 on failure
* Params @fd: file descriptor
* @num: No. of bytes to write
* @Ptr_buff: Pointer to the buffer containing the
* bytes to be written on the SDA
****************************************************************/
int i2c_multiple_writes(int fd, int num, unsigned char *Ptr_buff)
{
int ret = 0;
ret = write(fd, Ptr_buff, num);
if((ret == -1) || (ret != num))
return -1;
else
return(ret);
}
/****************************************************************
* Function Name : i2c_write_register
* Description : Write a control byte or byte to a register
* Returns : No. of bytes written on success, -1 on failure
* Params @fd: file descriptor
* @reg_addr_or_cntrl: Control byte or Register
* address to be written
* @val: Command or value to be written in the
* addressed register
****************************************************************/
int i2c_write_register(int fd, unsigned char reg_addr_or_cntrl, unsigned char val)
{
unsigned char buff[2];
int ret = 0;
buff[0] = reg_addr_or_cntrl;
buff[1] = val;
ret = write(fd, buff, I2C_TWO_BYTES);
if((ret == -1) || (ret != I2C_TWO_BYTES))
return -1;
else
return(ret);
}
/****************************************************************
* Function Name : config_i2c_struct
* Description : Initialize the I2C device structure
* Returns : NONE
* Params @i2c_dev_path: Device path
* @slave_addr: Slave device address
* @i2c_dev: Pointer to the device structure
****************************************************************/
void config_i2c_struct(char *i2c_dev_path, unsigned char slave_addr, I2C_DevicePtr i2c_dev)
{
i2c_dev->i2c_dev_path = i2c_dev_path;
i2c_dev->fd_i2c = 0;
i2c_dev->i2c_slave_addr = slave_addr;
}
/****************************************************************
* Function Name : init_i2c_dev
* Description : Connect the i2c bus to the slave device
* Returns : 0 on success, -1 on failure
* Params @i2c_path: the path to the device
* @slave_addr: Slave device address
****************************************************************/
int init_i2c_dev(const char* i2c_path, unsigned char slave_address)
{
config_i2c_struct((char*)i2c_path, slave_address, &I2C_DEV_2);
if(Open_device(I2C_DEV_2.i2c_dev_path, &I2C_DEV_2.fd_i2c) == -1)
{
perror("I2C: Failed to open device |");
return -1;
}
if(Set_slave_addr(I2C_DEV_2.fd_i2c, I2C_DEV_2.i2c_slave_addr) == -1)
{
perror("I2C: Failed to connect to slave device |");
return -1;
}
return 0;
}

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/*
* MIT License
Copyright (c) 2017 DeeplyEmbedded
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* I2C.h
*
* Created on : Sep 4, 2017
* Author : Vinay Divakar
* Website : www.deeplyembedded.org
*/
#ifndef I2C_H_
#define I2C_H_
#include<stdint.h>
/* No. of bytes per transaction */
#define I2C_ONE_BYTE 1
#define I2C_TWO_BYTES 2
#define I2C_THREE_BYTES 3
/*Definitions specific to i2c-x */
#define I2C_DEV0_PATH "/dev/i2c-0"
#define I2C_DEV1_PATH "/dev/i2c-1"
#define I2C_DEV2_PATH "/dev/i2c-2"
/*I2C device configuration structure*/
typedef struct{
char* i2c_dev_path;
int fd_i2c;
unsigned char i2c_slave_addr;
}I2C_DeviceT, *I2C_DevicePtr;
/* Exposed Generic I2C Functions */
extern int Open_device(char *i2c_dev_path, int *fd);
extern int Close_device(int fd);
extern int Set_slave_addr(int fd, unsigned char slave_addr);
extern int i2c_write(int fd, unsigned char data);
extern int i2c_read(int fd, unsigned char *read_data);
extern int i2c_read_register(int fd, unsigned char read_addr, unsigned char *read_data);
extern int i2c_read_registers(int fd, int num, unsigned char starting_addr,
unsigned char *buff_Ptr);
extern void config_i2c_struct(char *i2c_dev_path, unsigned char slave_addr, I2C_DevicePtr i2c_dev);
extern int i2c_multiple_writes(int fd, int num, unsigned char *Ptr_buff);
extern int i2c_write_register(int fd, unsigned char reg_addr_or_cntrl, unsigned char val);
/* Exposed I2C-x Specific Functions */
extern int init_i2c_dev(const char* i2c_path, unsigned char slave_address);
#endif /* I2C_H_ */

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MIT License
Copyright (c) 2017 DeeplyEmbedded
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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CC = gcc
LD = gcc
SOURCES = SSD1306_OLED_Library/SSD1306_OLED.c Example_Code/Main.c Example_Code/example_app.c I2C_Library/I2C.c
OBJS := $(SOURCES:.c=.o)
CPPFLAGS := -I SSD1306_OLED_Library -I I2C_Library
CFLAGS := -g
oled: $(OBJS)
$(CC) $^ -o $@
clean:
rm -rf oled $(OBJS)
compile: oled
install: compile
mkdir -p $(DESTDIR)/usr/bin
cp oled $(DESTDIR)/usr/bin/oled

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# SSD1306-OLED-display-driver-for-BeagleBone
This is a SSD1306 OLED Display Library fully compatible with the BeagleBone.
The Library has 3 components:
1. I2C component for enabling communication between the BeagleBone and display.
2. Control component for sending I2C commands to configure and control the display.
3. Graphics component for drawing geometrical figures, bitmaps, texts, characters, emoticons and numbers.
Author: Vinay Divakar
References:
1. https://github.com/adafruit/Adafruit_SSD1306
2. https://github.com/adafruit/Adafruit-GFX-Library
Youtube demo: https://youtu.be/sDKf6zW6Pyg
MIT license, check LICENSE file for more information
This Library is written in C. To use it, just include the I2C and SSD1306 Libraries in your project.
Enjoy :)

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/*
* MIT License
Copyright (c) 2017 DeeplyEmbedded
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* SSD1306_OLED.h
*
* Created on : Sep 21, 2017
* Author : Vinay Divakar
* Website : www.deeplyembedded.org
*/
#ifndef SSD1306_OLED_H_
#define SSD1306_OLED_H_
/* Lib's */
#include <stdbool.h>
/* Find Min and Max - MACROS */
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
/* I2C Address of SSD1306 */
#define SSD1306_OLED_ADDR 0x3C
#define DISPLAY_BUFF_SIZE (SSD1306_LCDWIDTH*SSD1306_LCDHEIGHT/8)
/* COLOR MACROS */
#define WHITE 1
#define BLACK 0
#define INVERSE 2
/* Number output format */
#define DEC 10
#define HEX 16
#define OCT 8
#define BIN 2
#define DEFAULT 0
/*D/C# bit is '0' indicating that following
* byte is a command. '1' is for data
*/
#define SSD1306_CNTRL_CMD 0x00
#define SSD1306_CNTRL_DATA 0x40
/*-----------------------Enable the WxL of the Display ---------------------------*/
//#define SSD1306_128_64
#define SSD1306_128_32
//#define SSD1306_96_16
/*--------------------------------------------------------------------------------*/
/* LCD HxW i.e. 64x128 || WxL i.e. 128x64 */
#if defined SSD1306_128_64
#define SSD1306_LCDWIDTH 128
#define SSD1306_LCDHEIGHT 64
#endif
#if defined SSD1306_128_32
#define SSD1306_LCDWIDTH 128
#define SSD1306_LCDHEIGHT 32
#endif
#if defined SSD1306_96_16
#define SSD1306_LCDWIDTH 96
#define SSD1306_LCDHEIGHT 16
#endif
/* SSD1306 Commands */
#define SSD1306_DISPLAY_OFF 0xAE
#define SSD1306_SET_DISP_CLK 0xD5
#define SSD1306_SET_MULTIPLEX 0xA8
#define SSD1306_SET_DISP_OFFSET 0xD3
#define SSD1306_SET_DISP_START_LINE 0x40
#define SSD1306_CONFIG_CHARGE_PUMP 0x8D
#define SSD1306_SET_MEM_ADDR_MODE 0x20
#define SSD1306_SEG_REMAP (0xA0 | 0x01)
#define SSD1306_SEG_REMAP1 0xA0
#define SSD1306_SET_COMSCANDEC 0xC8
#define SSD1306_SET_COMSCANDEC1 0xC0
#define SSD1306_SET_COMPINS 0xDA
#define SSD1306_SET_CONTRAST 0x81
#define SSD1306_SET_PRECHARGE 0xD9
#define SSD1306_SET_VCOMDETECT 0xDB
#define SSD1306_DISPLAYALLON_RESUME 0xA4
#define SSD1306_NORMAL_DISPLAY 0xA6
#define SSD1306_DISPLAYON 0xAF
#define SSD1306_SET_COL_ADDR 0x21
#define SSD1306_PAGEADDR 0x22
#define SSD1306_INVERT_DISPLAY 0x01
#define SSD1306_NORMALIZE_DISPLAY 0x00
/* SDD1306 Scroll Commands */
#define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
#define SSD1306_ACTIVATE_SCROLL 0x2F
#define SSD1306_DEACTIVATE_SCROLL 0x2E
#define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
#define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A
#define SSD1306_INVERTDISPLAY 0xA7
/* SSD1306 Configuration Commands */
#define SSD1306_DISPCLK_DIV 0x80
#if defined SSD1306_128_64
#define SSD1306_MULT_64 0x3F
#endif
#if defined SSD1306_128_32
#define SSD1306_MULT_64 0x1F
#endif
#define SSD1306_MULT_64 0x1F
#define SSD1306_DISP_OFFSET_VAL 0x00
#define SSD1306_COL_START_ADDR 0x00 //Reset to = 0
#define SSD1306_COL_END_ADDR (SSD1306_LCDWIDTH - 1) //Reset to = 127
#define SSD1306_PG_START_ADDR 0x00
#define SSD1306_PG_END_ADDR 7
#define SSD1306_CHARGE_PUMP_EN 0x14
#if defined SSD1306_128_64
#define SSD1306_CONFIG_COM_PINS 0x12
#endif
#if defined SSD1306_128_32
#define SSD1306_CONFIG_COM_PINS 0x02
#endif
#define SSD1306_CONTRAST_VAL 0xCF //207
#define SSD1306_PRECHARGE_VAL 0xF1
#define SSD1306_VCOMH_VAL 0x40
#define SSD1306_MULT_DAT (SSD1306_LCDHEIGHT - 1)
#define SSD1306_HOR_MM 0x00
/*SSD1306 Display API's */
extern void clearDisplay();
extern void display_Init_seq();
extern void Display();
extern void Init_Col_PG_addrs(unsigned char col_start_addr, unsigned char col_end_addr,
unsigned char pg_start_addr, unsigned char pg_end_addr);
extern void setRotation(unsigned char x);
extern void startscrollright(unsigned char start, unsigned char stop);
extern void startscrollleft(unsigned char start, unsigned char stop);
extern void startscrolldiagright(unsigned char start, unsigned char stop);
extern void startscrolldiagleft(unsigned char start, unsigned char stop);
extern void stopscroll();
extern void setCursor(short x, short y);
extern short getCursorX();
extern short getCursorY();
extern unsigned char getRotation();
extern void invertDisplay(unsigned char i);
/*SSD1306 Graphics Handling API's */
extern signed char drawPixel(short x, short y, short color);
extern void writeLine(short x0, short y0, short x1, short y1, short color);
extern void drawCircleHelper( short x0, short y0, short r, unsigned char cornername, short color);
extern void drawLine(short x0, short y0, short x1, short y1, short color);
extern void drawRect(short x, short y, short w, short h, short color);
extern void fillRect(short x, short y, short w, short h, short color);
extern void drawCircle(short x0, short y0, short r, short color);
extern void fillCircleHelper(short x0, short y0, short r, unsigned char cornername, short delta, short color);
extern void fillCircle(short x0, short y0, short r, short color);
extern void drawTriangle(short x0, short y0, short x1, short y1, short x2, short y2, short color);
extern void fillTriangle(short x0, short y0, short x1, short y1, short x2, short y2, short color);
extern void drawRoundRect(short x, short y, short w, short h, short r, short color);
extern void fillRoundRect(short x, short y, short w, short h, short r, short color);
extern void drawBitmap(short x, short y, const unsigned char bitmap[], short w, short h, short color);
extern short oled_write(unsigned char c);
/*SSD1306 Text and Character Handling API's */
extern void setTextSize(unsigned char s);
extern void setTextColor(short c);
extern void setTextWrap(bool w);
extern void drawChar(short x, short y, unsigned char c, short color, short bg, unsigned char size);
extern short print_str(const unsigned char *strPtr);
extern short println();
extern short print_strln(const unsigned char *strPtr);
/*SSD1306 Number Handling API's */
extern short printNumber(unsigned long n, unsigned char base);
extern short printNumber_UL(unsigned long n, int base);
extern short printNumber_UL_ln(unsigned long num, int base);
extern short printNumber_UI(unsigned int n, int base);
extern short printNumber_UI_ln(unsigned int n, int base);
extern short printNumber_UC(unsigned char b, int base);
extern short printNumber_UC_ln(unsigned char b, int base);
extern short printNumber_L(long n, int base);
extern short printNumber_L_ln(long num, int base);
extern short printNumber_I(int n, int base);
extern short printNumber_I_ln(int n, int base);
extern short printFloat(double number, unsigned char digits);
extern short printFloat_ln(double num, int digits);
#endif /* SSD1306_OLED_H_ */

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#ifndef _GFXFONT_H_
#define _GFXFONT_H_
typedef struct { // Data stored PER GLYPH
unsigned short bitmapOffset; // Pointer into GFXfont->bitmap
unsigned char width, height; // Bitmap dimensions in pixels
unsigned char xAdvance; // Distance to advance cursor (x axis)
char xOffset, yOffset; // Dist from cursor pos to UL corner
} GFXglyphT, *GFXglyphPtr;
typedef struct { // Data stored for FONT AS A WHOLE:
unsigned char *bitmap; // Glyph bitmaps, concatenated
GFXglyphPtr glyph; // Glyph array
unsigned char first, last; // ASCII extents
unsigned char yAdvance; // Newline distance (y axis)
} GFXfontT, *GFXfontPtr;
#endif // _GFXFONT_H_