【正文】 ...................................................5 系統(tǒng)方案結構圖 ......................................................................................................................................................................5第三章 基于 GPS 授時的點陣 LED 屏顯示時鐘的系統(tǒng) ................................................................................................................6 NXP LPC11C24 主控板 ...............................................................................................................................................................6 NXP LPC11C24 簡介 ......................................................................................................................................................................6 開發(fā)環(huán)境 ......................................................................................................................................................................................7 LPCXPRESSO 的項目建立 ...............................................................................................................................................................8 點陣 LED 屏顯示模塊 ...............................................................................................................................................................8 P10 LED 點陣屏電路圖 ................................................................................................................................................................9 P10 LED 點陣顯示屏的指標 ........................................................................................................................................................9 LED 點陣屏上控制 LED 的亮滅原理 .........................................................................................................................................10 LED 點陣屏的動態(tài)掃描原理 .....................................................................................................................................................10 主控模塊 LPC11C24 與 LED 點陣屏的引腳連接 .....................................................................................................................11 LED 點陣屏的顯示的軟件設計 .................................................................................................................................................12 控制 LED 亮滅的設計過程 .....................................................................................................................................................13 點陣屏的動態(tài)掃描設計過程 .........................................................................................................................................14BUF 緩沖區(qū)數據組織 .........................................................................................................................................................................15 時鐘顯示秒的控制 ...................................................................................................................................................................19 GPS 衛(wèi)星數據接收模塊 GR87 ................................................................................................................................................203. 技術簡介 .......................................................................................................................................................................20 GR87 .........................................................................................................................................................................................21 引腳功能 ....................................................................................................................................................................................21GR87 指標 .........................................................................................................................................................................................22 硬件接口— UART .....................................................................................................................................................................23 通信協(xié)議 NMEA.......................................................................................................................................................................24 主控模塊 LPC11C24 與 GR87 的連接 ...................................................................................................................................24 UART 接收 GPS 數據軟件設計 ...................................................................................................................................................25 供電電源的選擇 .....................................................................................................................................................................29 全 國 大 學 生 嵌 入 式 物 聯(lián) 網 設 計 大 賽 3第四章 系統(tǒng)測試 .........................................................................................................................................................................29 測試儀器和設備 ...................................................................................................................................................................29 測試方案 ................................................................................................................................................................................30 LED 點陣屏顯示測試 ...............................................................................................................................................................30 GPS 通信測試 ............................................................................................................................................................................30 NXP LPC11C24 測試 ................................................................................................................................................................30 系統(tǒng)綜合測試 .......................................