keyscan.mp

一个解决5个IO口扫描25个按键的解决方法,完整文件包,有参考意义,C51.

NOTE: AVR Code addresses are word addresses
All other addresses (including ones in FLASH) are byte addresses

Area                               Addr   Size   Decimal Bytes (Attributes)
--------------------------------   ----   ----   ------- ----- ------------
                        func_lit   0026   0032 =     50. bytes (rel,con,rom)

       Addr  Global Symbol
      -----  --------------------------------
       0026  __func_lit_start
       0058  __func_lit_end

Area                               Addr   Size   Decimal Bytes (Attributes)
--------------------------------   ----   ----   ------- ----- ------------
                             lit   0058   000A =     10. bytes (rel,con,rom)

       Addr  Global Symbol
      -----  --------------------------------
       0058  __lit_start
       0062  __lit_end

Area                               Addr   Size   Decimal Bytes (Attributes)
--------------------------------   ----   ----   ------- ----- ------------
                           idata   0062   0005 =      5. bytes (rel,con,rom)

       Addr  Global Symbol
      -----  --------------------------------
       0062  __idata_start
       0067  __idata_end

Area                               Addr   Size   Decimal Bytes (Attributes)
--------------------------------   ----   ----   ------- ----- ------------
                            text   0068   04B2 =   1202. bytes (rel,con,rom)

       Addr  Global Symbol
      -----  --------------------------------
       0034  __start
       0034  __text_start
       0055  _exit
       0056  _Driver_INIT
       0057  _Delay_MS
       0064  _Insert_Timer0_OVF_ISR_Code
       0092  _chVirtualSPISender
       00B0  _Key_Scan
       00F4  _Key_Scan_New
       01B2  _Get_Code
       020D  _Device_INIT
       0212  HD_Support.c:Port_INIT
       0228  HD_Support.c:Timer0_INIT
       022F  _Timer0_OVF_ISR
       0260  _System_INIT
       0265  _main
       026E  lsl8
       0274  asgncblk
       028D  __text_end

Area                               Addr   Size   Decimal Bytes (Attributes)
--------------------------------   ----   ----   ------- ----- ------------
                            data   0060   0005 =      5. bytes (rel,con,ram)

       Addr  Global Symbol
      -----  --------------------------------
       0060  __data_start
       0062  _g_wSystemTimer
       0064  EX_Support.c:n
       0065  __data_end

Area                               Start  End    Decimal Bytes (Attributes)
--------------------------------   ----   ----   ------- ----- ------------
                          vector   0000   0014 =     20. bytes (abs,ovr,rom)

Files Linked      [ module(s) ]

D:\iccv7avr\lib\crtAVR.o	[ crtavr.s ]
EX_Support.o	[ EX_Support.c ]
HD_Support.o	[ HD_Support.c ]
PF_Config.o	[ PF_Config.c ]
System.o	[ System.c ]
<library>	[ lsl8.s, pmstruct.s ]

User Global Definitions

ram_end = 0x45f
hwstk_size = 0x20

User Base Address Definitions

func_lit = 0x26
data = 0x60
eeprom:0.512