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畢業(yè)論文設(shè)計(jì)-基于lpc1700的usb針式打印機(jī)-全文預(yù)覽

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【正文】 總體方案設(shè)計(jì) ........................................................................................................... 7 TFT 液晶屏 ............................................................................................................... 7 第 4章 系統(tǒng)硬件設(shè)計(jì) .................................................................................................. 8 核心板工作外圍器件 ............................................................................................... 8 復(fù)位電路 ........................................................................................................... 8 時(shí)鐘電路 ........................................................................................................... 8 JTAG 接口電路 ................................................................................................ 9 電 源電路設(shè)計(jì) ......................................................................................................... 10 系統(tǒng)用電分析 ................................................................................................. 10 電源電路選型 ................................................................................................. 10 USB 接口電路設(shè)計(jì) ................................................................................................ 10 打印機(jī)芯電路設(shè)計(jì) ................................................................................................. 10 主位置檢測 ..................................................................................................... 10 缺紙檢測 ......................................................................................................... 10 黑標(biāo)檢測 ......................................................................................................... 10 托架步進(jìn)電機(jī)驅(qū)動 ......................................................................................... 10 走紙步進(jìn)電機(jī)驅(qū)動 ......................................................................................... 10 打印頭保護(hù)與驅(qū)動電路 ................................................................................. 10 TFT 液晶顯示電路設(shè)計(jì) ......................................................................................... 10 字庫芯片電路設(shè)計(jì) ................................................................................................. 10 第 5章 系統(tǒng)軟件設(shè)計(jì) ................................................................................................ 11 上位機(jī)軟件設(shè)計(jì) ..................................................................................................... 11 USB 通信協(xié)議 ........................................................................................................ 11 USB 枚舉過程 ................................................................................................ 11 2 ZLG/USB Device 軟件包 ............................................................................... 12 打印機(jī) ESC/POS 協(xié)議命令 ................................................................................... 13 打印機(jī)芯底層驅(qū)動 ................................................................................................. 13 TFT 液晶顯示 ......................................................................................................... 13 字庫芯片 ................................................................................................................. 13 第 6章 系統(tǒng)調(diào)試與結(jié)果分析 ..........................
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