Difference between revisions of "BakeBit - OLED 128x64"
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==Introduction== | ==Introduction== | ||
[[File:BakeBit - OLED.jpg|thumb|OLED]] | [[File:BakeBit - OLED.jpg|thumb|OLED]] | ||
| − | *BakeBit - | + | * 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. |
==特性== | ==特性== | ||
Revision as of 15:19, 14 December 2016
Contents
1 Introduction
- 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 特性
- 使用标准的2.0mm 4 Pin BakeBit I2C接口
- 128x64分辨率
- 颜色：蓝色
- 模块I2C地址可配置。
- PCB尺寸（mm）：24x42
- 引脚说明:
| 名称 | 描述 |
| GND | 地 |
| 5V | 电源5V |
| 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：
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)
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：
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
- [Schematic](BakeBit - OLED 128x64.pdf)
- [Datasheet](BakeBit - OLED 128x64 Datasheet.pdf)
- [BakeBit Github项目](https://github.com/friendlyarm/BakeBit)
- [BakeBit Starter Kit手册](http://wiki.friendlyarm.com/bakebit/bakebit_starter_kit_manual_cn.pdf)
