eeprom_r_w.lis

环保型IC卡门禁系统的C程序

                        .module EEPROM_R_W.C
                        .area text(rom, con, rel)
 0000                   .dbfile D:\PROGRA~1\ICC\Pro(AVR)\环保型IC卡门禁系统\EEPROM_R_W.C
 0000                   .dbfunc e EEPROM_write _EEPROM_write fV
 0000           ;         ucData -> R18
 0000           ;      uiAddress -> R16,R17
                        .even
 0000           _EEPROM_write::
 0000                   .dbline -1
 0000                   .dbline 5
 0000           ; #include <iom8v.h>
 0000           ; #include <macros.h>
 0000           ;                      
 0000           ; void EEPROM_write(unsigned int uiAddress, unsigned char ucData)
 0000           ; {
 0000           L2:
 0000                   .dbline 8
 0000           L3:
 0000                   .dbline 7
 0000           ; /* 等待上一次写操作结束 */
 0000           ; while(EECR & (1<<EEWE))
 0000 E199              sbic 0x1c,1
 0002 FECF              rjmp L2
 0004                   .dbline 10
 0004           ; ;
 0004           ; /* 设置地址和数据寄存器 */
 0004           ; EEAR = uiAddress;
 0004 1FBB              out 0x1f,R17
 0006 0EBB              out 0x1e,R16
 0008                   .dbline 11
 0008           ; EEDR = ucData;
 0008 2DBB              out 0x1d,R18
 000A                   .dbline 13
 000A           ; /* 置位EEMWE */
 000A           ; EECR |= (1<<EEMWE);
 000A E29A              sbi 0x1c,2
 000C                   .dbline 15
 000C           ; /* 置位EEWE以启动写操作 */
 000C           ; EECR |= (1<<EEWE);
 000C E19A              sbi 0x1c,1
 000E                   .dbline -2
 000E           L1:
 000E                   .dbline 0 ; func end
 000E 0895              ret
 0010                   .dbsym r ucData 18 c
 0010                   .dbsym r uiAddress 16 i
 0010                   .dbend
 0010                   .dbfunc e EEPROM_read _EEPROM_read fc
 0010           ;      uiAddress -> R16,R17
                        .even
 0010           _EEPROM_read::
 0010                   .dbline -1
 0010                   .dbline 19
 0010           ; }
 0010           ; 
 0010           ; unsigned char EEPROM_read(unsigned int uiAddress)
 0010           ; {
 0010           L6:
 0010                   .dbline 22
 0010           L7:
 0010                   .dbline 21
 0010           ; /* 等待上一次写操作结束 */
 0010           ; while(EECR & (1<<EEWE))
 0010 E199              sbic 0x1c,1
 0012 FECF              rjmp L6
 0014                   .dbline 24
 0014           ; ;
 0014           ; /* 设置地址寄存器 */
 0014           ; EEAR = uiAddress;
 0014 1FBB              out 0x1f,R17
 0016 0EBB              out 0x1e,R16
 0018                   .dbline 26
 0018           ; /* 设置EERE以启动读操作 */
 0018           ; EECR |= (1<<EERE);
 0018 E09A              sbi 0x1c,0
 001A                   .dbline 28
 001A           ; /* 自数据寄存器返回数据 */
 001A           ; return EEDR;
 001A 0DB3              in R16,0x1d
 001C                   .dbline -2
 001C           L5:
 001C                   .dbline 0 ; func end
 001C 0895              ret
 001E                   .dbsym r uiAddress 16 i
 001E                   .dbend