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    "data": {
        "title": "2.2_TFT(Chinese)",
        "rev_id": 799,
        "updated_at": "2015-08-07T07:21:41+00:00",
        "chunk_count": 7,
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            {
                "title": "2.2_TFT(Chinese)",
                "rev_id": 799,
                "heading_path": "",
                "chunk_index": 0,
                "content": "# 2.2 TFT(Chinese)",
                "char_count": 18,
                "token_estimate": 5
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            {
                "title": "2.2_TFT(Chinese)",
                "rev_id": 799,
                "heading_path": "产品简介",
                "chunk_index": 1,
                "content": "这款迷你TFT屏幕专为树莓派而设计,在2.2'的屏幕上具有320\\*240的分辨率,16位色彩的显示能力,其通过高速SPI接口与树莓派进行通信,刷新速度很快,可以作为Xwindow的显示窗口,或者用于播放图片或视频,可以使用于A+,B+,pi2上 <img src=\"TFT22_show01.jpg\" title=\"TFT22_show01.jpg\" width=\"800\" alt=\"TFT22_show01.jpg\" \/>",
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            {
                "title": "2.2_TFT(Chinese)",
                "rev_id": 799,
                "heading_path": "产品参数",
                "chunk_index": 2,
                "content": "|     项目     |          参数          |\n|:------------:|:----------------------:|\n|   产品名称   | 树莓派:2.2'TFT显示模块 |\n|    分辨率    |        320×240         |\n|   屏幕尺寸   |          2.2'          |\n|   显示面积   |      47.3×36.5MM       |\n|   模块重量   |         23.9g          |\n|  显示刷新率  |        \\>20fps         |\n|   模块尺寸   | 66(长)x57(宽)x12(高)MM |\n|   模块接口   |       2\\*20排座        |\n| 屏幕控制方式 |        高速spi         |\n|   工作电压   |           5V           |",
                "char_count": 443,
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            {
                "title": "2.2_TFT(Chinese)",
                "rev_id": 799,
                "heading_path": "产品展示",
                "chunk_index": 3,
                "content": "<img src=\"TFT22_show02.jpg\" title=\"TFT22_show02.jpg\" width=\"800\" alt=\"TFT22_show02.jpg\" \/>\n<img src=\"TFT22_show03.jpg\" title=\"TFT22_show03.jpg\" width=\"800\" alt=\"TFT22_show03.jpg\" \/>\n<img src=\"TFT22_show04.jpg\" title=\"TFT22_show04.jpg\" width=\"800\" alt=\"TFT22_show04.jpg\" \/>\n<img src=\"TFT22_show05.jpg\" title=\"TFT22_show05.jpg\" width=\"800\" alt=\"TFT22_show05.jpg\" \/>\n<img src=\"TFT22_show06.jpg\" title=\"TFT22_show06.jpg\" width=\"800\" alt=\"TFT22_show06.jpg\" \/>\n<img src=\"TFT22_show07.jpg\" title=\"TFT22_show07.jpg\" width=\"800\" alt=\"TFT22_show07.jpg\" \/>",
                "char_count": 545,
                "token_estimate": 137
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            {
                "title": "2.2_TFT(Chinese)",
                "rev_id": 799,
                "heading_path": "如何使用 > 关于屏幕",
                "chunk_index": 4,
                "content": "-   初次使用树莓派2.2寸TFT显示模块需要下载驱动文件,驱动文件的下载链接为:\n\n<!-- -->\n\n-   下载完成后将驱动文件复制到树莓派用户目录下\n\n<img src=\"2.2TFT_tech1.png\" title=\"2.2TFT_tech1.png\" width=\"800\" alt=\"2.2TFT_tech1.png\" \/>\n\n-   使用`sudo tar -jxpvf TFT-stable-Build-20150424.tar.bz2 -C`解压缩文件\n\n<img src=\"2.2TFT_tech3.png\" title=\"2.2TFT_tech3.png\" width=\"800\" alt=\"2.2TFT_tech3.png\" \/>\n\n-   修改\/etc下modules文件,使用`sudo vim.tiny \/etc\/modules` 打开,修改内容如下所示,添加内容\n\n`fbtft dma` `fbtft_device name=rpi-display rotate=270 speed=64000000 gpios=dc:24,reset:23,led:18`\n<img src=\"2.2TFT_tech5.png\" title=\"2.2TFT_tech5.png\" width=\"800\" alt=\"2.2TFT_tech5.png\" \/>\n<img src=\"2.2TFT_tech6.png\" title=\"2.2TFT_tech6.png\" width=\"800\" alt=\"2.2TFT_tech6.png\" \/>\n\n-   修改完成后重新启动树莓派,可以看到树莓派的启动画面已经显示在屏幕上了",
                "char_count": 721,
                "token_estimate": 321
            },
            {
                "title": "2.2_TFT(Chinese)",
                "rev_id": 799,
                "heading_path": "如何使用 > 关于按键",
                "chunk_index": 5,
                "content": "-   对于屏幕按键的配置也很简单,首先安装evtest用来检测按键\n-   修改\/etc下的modules文件,修改文件如下,添加\n\n`gpio_keys_device pulldown active_low=0 keys=26:103,21:108,20:105,16:106`\n<img src=\"2.2TFT_tech4.png\" title=\"2.2TFT_tech4.png\" width=\"800\" alt=\"2.2TFT_tech4.png\" \/>\n<img src=\"2.2TFT_tech8.png\" title=\"2.2TFT_tech8.png\" width=\"800\" alt=\"2.2TFT_tech8.png\" \/>\n<img src=\"2.2TFT_tech9.png\" title=\"2.2TFT_tech9.png\" width=\"800\" alt=\"2.2TFT_tech9.png\" \/>\n\n-   修改完成后重启系统,输入sudo evtest启动按键检测,输入0选择测试模式,此时点按2.2'TFT屏幕上的按键可以发现树莓派树莓派已经识别到按键\n\n<img src=\"2.2TFT_tech11.png\" title=\"2.2TFT_tech11.png\" width=\"800\" alt=\"2.2TFT_tech11.png\" \/>\n<img src=\"2.2TFT_tech12.png\" title=\"2.2TFT_tech12.png\" width=\"800\" alt=\"2.2TFT_tech12.png\" \/>",
                "char_count": 683,
                "token_estimate": 282
            },
            {
                "title": "2.2_TFT(Chinese)",
                "rev_id": 799,
                "heading_path": "附件",
                "chunk_index": 6,
                "content": "[1306-0.91-CODE.zip](1306-0.91-CODE.zip \"wikilink\")\n[SSD1306-Revision 1.0.pdf](SSD1306-Revision_1.0.pdf \"wikilink\")",
                "char_count": 115,
                "token_estimate": 29
            }
        ]
    }
}