Difference between revisions of "BakeBit - OLED 128x64"

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(→‎Introduction)
(→‎特性)
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* Users can set the I2C's address to either 0X3C or 0X3D and place two OLED modules on one I2C bus.
 
* Users can set the I2C's address to either 0X3C or 0X3D and place two OLED modules on one I2C bus.
  
−
==特性==
+
==Hardware Spec==
−
* 使用标准的2.0mm 4 Pin BakeBit I2C接口
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* Standard 2.0mm pitch 4-Pin BakeBit I2C Interface
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* 128x64分辨率
+
* Resolution: 128 x 64
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* 颜色：蓝色
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* Color: blue
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* 模块I2C地址可配置。
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* I2C's address configurable
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* PCB尺寸（mm）：24x42
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* PCB dimension(mm): 24 x 42
 
[[File:BakeBit - OLED_Top_PCB.png | frameless|400px|BakeBit - OLED_Top]]
 
[[File:BakeBit - OLED_Top_PCB.png | frameless|400px|BakeBit - OLED_Top]]
 
[[File:BakeBit - OLED_Bottom_PCB.png | frameless|359px|BakeBit - OLED_Bottom]]
 
[[File:BakeBit - OLED_Bottom_PCB.png | frameless|359px|BakeBit - OLED_Bottom]]
  
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* 引脚说明:
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* Pin Description:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
−
|名称 || 描述
+
|Pin || Description
 
|-
 
|-
−
|GND  || 地
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|GND  || Ground
 
|-
 
|-
−
|5V    || 电源5V
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|5V    || 5V Supply Voltage
 
|-
 
|-
 
|SDA    || I2C-SDA
 
|SDA    || I2C-SDA

Revision as of 15:21, 14 December 2016

查看中文

1 Introduction

OLED
  • The BakeBit - OLED is a monochromatic OLED module. The OLED is 0.96" and its resoltuion is 128 x 64. Its interface is I2C.
  • Users can set the I2C's address to either 0X3C or 0X3D and place two OLED modules on one I2C bus.

2 Hardware Spec

  • Standard 2.0mm pitch 4-Pin BakeBit I2C Interface
  • Resolution: 128 x 64
  • Color: blue
  • I2C's address configurable
  • PCB dimension(mm): 24 x 42

BakeBit - OLED_Top BakeBit - OLED_Bottom

  • Pin Description:
Pin Description
GND Ground
5V 5V Supply Voltage
SDA I2C-SDA
SCL I2C-SCL

3 示例程序(1)：Display System Info

这个例子我们使用显示屏来显示系统信息，例如IP地址，存储空间和内存信息，CPU当前频率等。

3.1 硬件连接

简单的将 OLED 模块插入随便一个 I2C 接口，如下面这样：

OLED-1.jpg OLED-2.jpg

3.2 示例源代码

import time
import bakebit
import os
import psutil
from math import log
import multiprocessing
import platform
import socket
import bakebit_128_64_oled as oled
 
oled.init()                  #initialze SEEED OLED display
oled.clearDisplay()          #clear the screen and set start position to top left corner
oled.setNormalDisplay()      #Set display to normal mode (i.e non-inverse mode)
oled.setPageMode()           #Set addressing mode to Page Mode
 
byteunits = ('B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB')
def filesizeformat(value):
    exponent = int(log(value, 1024))
    return "%.1f %s" % (float(value) / pow(1024, exponent), byteunits[exponent])
 
memUsage = psutil.phymem_usage()
diskUsage = psutil.disk_usage('/')
 
oled.setTextXY(0,0)
oled.putString("%s" % socket.gethostbyname(socket.gethostname()))
 
oled.setTextXY(0,1)
oled.putString("Mem:%s" % filesizeformat(memUsage.total))
import time
import bakebit
import os
import psutil
from math import log
import multiprocessing
import platform
import socket
import bakebit_128_64_oled as oled
 
oled.init()                  #initialze SEEED OLED display
oled.clearDisplay()          #clear the screen and set start position to top left corner
oled.setNormalDisplay()      #Set display to normal mode (i.e non-inverse mode)
oled.setPageMode()           #Set addressing mode to Page Mode
 
byteunits = ('B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB')
def filesizeformat(value):
    exponent = int(log(value, 1024))
    return "%.1f %s" % (float(value) / pow(1024, exponent), byteunits[exponent])
 
memUsage = psutil.phymem_usage()
diskUsage = psutil.disk_usage('/')
 
oled.setTextXY(0,0)
oled.putString("%s" % socket.gethostbyname(socket.gethostname()))
 
oled.setTextXY(0,1)
oled.putString("Mem:%s" % filesizeformat(memUsage.total))
 
oled.setTextXY(0,2)
oled.putString("Usage:%d%%" % memUsage.percent)
 
oled.setTextXY(0,3)
oled.putString("Disk:%s" % filesizeformat(diskUsage.total))
 
oled.setTextXY(0,4)
oled.putString("Usage:%d%%" % diskUsage.percent)
 
oled.setTextXY(0,5)
oled.putString("CPU:%s" % platform.processor())
 
oled.setTextXY(0,6)
oled.putString("Cores:%d" % multiprocessing.cpu_count())
 
with open("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq") as f:
	freq = int(f.readlines()[0])/1000
	freqStr = "%d MHz" % freq
	if freq > 1000:
		freqStr = "%.1f GHz" % (float(freq)/1000.0)
	oled.setTextXY(0,7)
	oled.putString("Freq:%s" % freqStr)
oled.setTextXY(0,2)
oled.putString("Usage:%d%%" % memUsage.percent)
 
oled.setTextXY(0,3)
oled.putString("Disk:%s" % filesizeformat(diskUsage.total))
 
oled.setTextXY(0,4)
oled.putString("Usage:%d%%" % diskUsage.percent)
 
oled.setTextXY(0,5)
oled.putString("CPU:%s" % platform.processor())
 
oled.setTextXY(0,6)
oled.putString("Cores:%d" % multiprocessing.cpu_count())
 
with open("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq") as f:
	freq = int(f.readlines()[0])/1000
	freqStr = "%d MHz" % freq
	if freq > 1000:
		freqStr = "%.1f GHz" % (float(freq)/1000.0)
	oled.setTextXY(0,7)
	oled.putString("Freq:%s" % freqStr)

Github

3.3 运行示例

假设你已经参考bakebit教程安装了BakeBit源代码，
要运行示例程序，可以在开发板上进入 BakeBit/Software/Python目录,运行bakebit_prj_SystemInfo.py: 

cd ~/BakeBit/Software/Python
sudo python bakebit_prj_SystemInfo.py

3.4 运行结果

效果如下图所示：
OLED-SystemInfo.jpg

4 示例程序(2)：UI Control via Joystick

该示例是配合BakeBit - JoyStick来实现的，可参考BakeBit - JoyStick页面。

5 相关资料

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