[掌控]循环语句编写--创新中国有你有我

假期里，在大圣老师的帮助下，掌控的第一作品完成后，创客的步伐就停不下来了

     在掌控板上循环交替播放：二高logo和掌控图标

一、OLED屏点阵

1、OLED显示技术具有自发光的特性，采用非常薄的有机材料涂层和玻璃基板，当有电流通过时，这些有机材料就会发光，而且OLED显示屏幕可视角度大，并且能够节省电能，以OLED使用的有机发光材料来看，
2、以染料及颜料为材料的小分子器件系统，同时由于有机电致发光器件具有发光二极管整流与发光的特性，因此小分子有机电致发光器件亦被称为OLED(Organic Light Emitting Diode)，
3、OLED的基本结构是由一薄而透明具半导体特性之铟锡氧化物(ITO)，与电力之正极相连，再加上另一个金属阴极，包成如三明治的结构。整个结构层中包括了：空穴传输层(HTL)、发光层(EL)与电子传输层(ETL)。
4、当电力供应至适当电压时，正极空穴与阴极电荷就会在发光层中结合，产生光亮，依其配方不同产生红、绿和蓝RGB三基色，构成基本色彩。
5、OLED的特性是自己发光，不像TFT LCD需要背光，因此可视度和亮度均高，其次是电压需求低且省电效率高，加上反应快、重量轻、厚度薄，构造简单，成本低等，被视为 21世纪最具前途的产品之一.
6、一行显示不到12个汉字，即占点阵11*11，中文标点占11*11点阵  ，数字约6*9点阵。小写字母约点6*12点阵。大写字母约占8*9点阵。（仅供参考）
二、 处理图片：
1、利用美图秀秀分别将校徽分辨率图片处理成54*54（校徽），掌控板图片分辨率：128*32.
2、利用取模工具对图片进行取模。网上有PCtoLCD、lcd image converter等取模软件，可根据自己喜好自行选择。以下使用的是Img2Lcd工具。

l 步骤1.导入刚才修改后的图片

步骤2.选择参数,输出数据类型[C语言数组]、扫描模式[水平扫描]、输出灰度[单色]、宽高[128*64]（注意：一定要根据实际图片效果来调整亮度和对比度，已达到最佳显示效果）

l 步骤3.保存数据：点击保存，填写好文件名，自动会弹出图像的取模值。但是我们在使用的时候一定要注意：前面的注释部分（下图中的蓝色部分）不能写入一会儿的程序中。

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三、编程

1、显示“创新中国 有你有我 ”程序如下：

第一部分：调用库文件

from mpython import * #导入库文件

import framebuf

import time  

第二部分：设置图片的数组，该部分数组来自图像取模工具，就是刚才我们生成的校徽和掌控两个c文件，

第三部分：创建缓存，读取图片

fb2 = framebuf.FrameBuffer(bmp2,128,32, framebuf.MONO_HLSB)   #创建128x64大小帧缓存区储存图片帧，水平扫描      #oled

第四部分：主程序部分