File list (Check if you may need any files):
SIM900
......\Arduino SIM900 GSMGPRS 扩展板 GPRS shield.rar
......\DOC_SIM900 Reference Design Guide.pdf
......\DOC_SIM900_AT Command Manual_V1.03.pdf
......\DOC_SIM900_AT_Command_Manua.pdf
......\DOC_SIM900_Hardware Design_V2.00.pdf
......\DOC_SIM900_schematic_ref.pdf
......\DS_IM120525010_GPRS_Module.pdf
......\ICOMSAT SIM900 GSMGPRS扩展板.zip
......\Library_IM130609001_Raspberry_PI_SIM900_GSM_GPRS_Module_Adapter_Kit
......\Library_IM130609001_Raspberry_PI_SIM900_GSM_GPRS_Module_Adapter_Kit.zip
......\...................................................................\ITEAD_RPI_GSM_Library
......\...................................................................\.....................\example
......\...................................................................\.....................\.......\CheckR.c
......\...................................................................\.....................\.......\CheckVer.c
......\...................................................................\.....................\.......\GSMCheck.c
......\...................................................................\.....................\.......\TakeAPhone.c
......\...................................................................\.....................\GSM.c
......\...................................................................\.....................\GSM.h
......\...................................................................\.....................\GSMDemo.c
......\...................................................................\.....................\makefile
......\...................................................................\.....................\piHiPri.c
......\...................................................................\.....................\piThread.c
......\...................................................................\.....................\pthread.h
......\...................................................................\.....................\version.txt
......\...................................................................\.....................\wiringPi.c
......\...................................................................\.....................\wiringPi.h
......\Lib_GSM_Shield.zip
......\SCH_IM120417009_IComSat.pdf
......\SCH_IM120525010_GPRS_Module.pdf
......\产品手册
......\........\icomsat V1.0_DS.pdf
......\其他资料
......\........\sim900_sim300demo.exe
......\原理图
......\......\sch-icomsat-v1.0.pdf
......\范例代码
......\........\GSM_Shield
......\........\GSM_Shield2.zip
......\........\..........\examples
......\........\..........\........\GSM_Shield_Call
......\........\..........\........\...............\GSM_Shield_Call.pde
......\........\..........\........\GSM_Shield_LibVer
......\........\..........\........\.................\GSM_Shield_LibVer.pde
......\........\..........\........\GSM_Shield_Reg
......\........\..........\........\..............\GSM_Shield_Reg.pde
......\........\..........\........\GSM_Shield_Test
......\........\..........\........\...............\GSM_Shield_Test.pde
......\........\..........\GSM_Shield.cpp
......\........\..........\GSM_Shield.h
......\........\..........\keywords.txt
......\........\..........\Library GSM_Shield.doc
......\........\..........\Library GSM_Shield.odt
......\........\..........\NewSoftSerial.cpp
......\........\..........\NewSoftSerial.h