key.uv2

这里很详细地将了怎样编写一个4*4的行列扫描式键盘（它已经通过keil编译并使用）。该程序利用P1口作为行列扫描端口,它能够识别是否有多键按下

### uVision2 Project, (C) Keil Software
### Do not modify !

Target (Target 1), 0x0000 // Tools: 'MCS-51'

Group (Source Group 1)

File 1,2,<.\STARTUP.A51><STARTUP.A51> 0x0 
File 1,1,<.\code\main.c><main.c> 0x0 
File 1,5,<.\code\config.h><config.h> 0x0 


Options 1,0,0  // Target 'Target 1'
 Device (8052 (all Variants))
 Vendor (Generic)
 Cpu (IRAM(0-0xFF) IROM(0-0x1FFF) CLOCK(12000000))
 FlashUt ()
 StupF ("LIB\STARTUP.A51" ("Standard 8051 Startup Code"))
 FlashDR ()
 Rgf (REG52.H)
 Mem ()
 C ()
 A ()
 RL ()
 OH ()
 UseEnv=0
 EnvBin ()
 EnvInc ()
 EnvLib ()
 EnvReg ()
 OrgReg ()
 TgStat=0
 OutDir (.\)
 OutName (key)
 GenApp=1
 GenLib=0
 GenHex=1
 Debug=1
 Browse=1
 LstDir (.\)
 HexSel=0
 MG32K=0
 TGMORE=0
 RunUsr 0 0 <>
 RunUsr 1 0 <>
 BrunUsr 0 0 <>
 BrunUsr 1 0 <>
 SVCSID <>
 MODEL5=0
 RTOS5=0
 ROMSZ5=2
 DHOLD5=0
 XHOLD5=0
 T51FL=80
 CBANKS5=0
 XBANKS5=0
 RCB51 { 0,0,0,0,0,0,0,1,0 }
 RXB51 { 0,0,0,0,0,0,0,0,0 }
 OCM51 { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
 OCR51 { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
 IRO51 { 1,0,0,0,0,0,32,0,0 }
 IRA51 { 0,0,0,0,0,0,1,0,0 }
 XRA51 { 0,0,0,0,0,0,0,0,0 }
 XRA512 { 0,0,0,0,0,0,0,0,0 }
 C51FL=21630224
 C51VA=0
 C51MSC ()
 C51DEF ()
 C51UDF ()
 INCC5 ()
 AX51FL=4
 AX51MSC ()
 AX51SET ()
 AX51RST ()
 INCA5 ()
 PropFld { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
 IncBld=1
 AlwaysBuild=0
 GenAsm=0
 AsmAsm=0
 PublicsOnly=0
 StopCode=3
 CustArgs ()
 LibMods ()
 BankNo=65535
 LX51FL=292
 LX51OVL ()
 LX51MSC ()
 LX51DWN ()
 LX51LFI ()
 LX51ASN ()
 LX51RES ()
 LX51CCL ()
 LX51UCL ()
 LX51CSC ()
 LX51UCS ()
 LX51COB ()
 LX51XDB ()
 LX51PDB ()
 LX51BIB ()
 LX51DAB ()
 LX51IDB ()
 LX51PRC ()
 LX51STK ()
 LX51COS ()
 LX51XDS ()
 LX51BIS ()
 LX51DAS ()
 LX51IDS ()
  OPTDL (S8051.DLL)()(DP51.DLL)(-p52)(S8051.DLL)()(TP51.DLL)(-p52)
  OPTDBG 48125,0,()()()()()()()()()() ()()()()
 FLASH1 { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
 FLASH2 ()
 FLASH3 ()
EndOpt