文档介绍：:mand+mandParameter0..noptionalparameter,mandChecksum10x100-((sumofalllength/mand/parameterbytes)&0xFF):命令说明0xff0x550x030x000x010x040xf8打开ipod串口连接,并进入高级控制模式通讯命令说明?0xFF0x55+length+0x040x000x00+Result(1)+Command(2)+校验位(1)mandwasn′tunderstood返回:0xFF0x55+length+0x040x000x01+Result(1)+Command(2)+校验位(1)返回信息result::mand0xFF0x550x030x040x000x020xf7发送简单的ping指令,返回:FF550B040003FFFFFFFF00000000F2,表示连接成功返回:0xFF0x550x0B0x040x000x030xFF0xFF0xFF0xFF0x000x000x000x000xF2,表示成功连接?0xff0x550x030x040x000x090xf0?returnsflagsetwith0x000x0b,don′tknow,whatthismeans(perhapsanindicatorfortrack-change-ifyousetthisflagto0x01itturnsto0x00againafterchangingthetrack)?返回:0xFF0x550x040x040x000x0A+byte(1)+校验位(1)Byte=0x00or0x01?0xFF0x550x040x040x000x0B+byte(1)+校验位(1)parameter0x00&ess-answere(copare0x000x01),don′tknowwhathappens-seemstobeaflagwhichcanbereadwith0x000x09?0xFF0x550x040x040x000x0C+byte(7)+校验位(1)???resultsinaanswer0x0d?0xFF0x550x040x040x000x0D+byte(7)orbyte(1)+校验位(1)triedsomeparameters-resultseemstodependentoncurrentplaylistparameters0x000x000x000x000x000x000x00give(onmyIpod)11bytes(0x000x000x000x000x000x000x020xf00xdb0x000x00inmain-Playlist-*not*theplaylist-numberand*not*thecountoftracksinthisplaylist)essorywhenthereisatrackchange(onesongendsandanotherbegins).Soitisa"subscription"-