AV121讲义.doc

Block Diagram: MAIN: Function Block : Down Load FW: Read CCD Raw Data: Learning: White Calibration: TWAIN SCAN : CHECK PAPER IN ADF : Get Light Status: Read Calibration Format: Send Gamma Table: Read Image: ADF Test() ButtonBuf1=0… Y Y FlagRunIn==1 ButtonBuf1=1… VBusDetect ==1 While ( 1) Y Y N N N FlagRunIn = 0 任2鍵同時被按 RunInCnt = 80 While ( 1) FlagRunIn = 1 GPIO Init ( ) Function Start ASIC SW Reset ( ) N WaitCommand() Whjle(1) Enable Timer 1 interrupt Read NVRAM low128 data calibration ReadNVRam PoSaving Time LightCheckA USBInit() ReadID Whjle(1) FlagError==0 N Y Hatch Detect ( ) //check cover show error USB Protocol Scanner Information Run – In Mode Down Load FW Read RAW DATA Learning Mechanical OD Image Process Gamma shading TWAIN 的掃描 將SDRAM中從0X178000 開始的32K 寫入FLASH 清空FLASH 32K 將ROM中32K寫入SDRAM 0X178000 LoadFlashRom FlagDownLoadOK=1 N SetError(1) 與D/L的SUM比較 計算SDRAM中FW的 CHECK SUM SetError(1) N Y Y 判斷FWID是否一致 從USB拿Data放入 DownloadFWST+DownloadFWLength DownLoadFW()W Y N SetError(1) 與SDRAMD/L的SUM比較 計算FLASH中DownLoadFW的check sum. 將SDRAM中從0X180000開始的DownloadFWLength寫入 Flash接著的位置. 向Flash中固定位置寫入 “ROM OK” CheckSum. Read CCD Raw () Pass Actual pixel Number MODE to AP. Read CCD Raw Data Format () Set Channel type, pixel Number Set Channel type Set Gain value is 1 Set Resolution 600*600 Power Saving Disable ASIC SW DRAM Reset Abort command () Send Raw Data Format () Read Nvram low128 byte Start Scan () APSendGammaTable () Calibration () Set Win () /scan area ,res,mo Get Light Status () 將TempBuffer (HIGH 128) writetoNVRAM “0” GetDataUSB (TempBuffer) N Y Flag Learning ==0. Write Learning Data () 將NVRAM中Lead/Side edge 清零並設標記FlagLearning=1. Reset Learning Data () FW Send () 向NVRAM相應位置寫入 “ MARK” Send OD learning data to NV Send low 128 learning data lead/side edge to NVRA Read learning data to AP AP Send Nvram Point 129 DowHalfTownT() White calibration