eeprom.lis

用ATMEGA16的硬件SPI驱动AT45DB041D

                        .module eeprom.c
                        .area text(rom, con, rel)
 0000                   .dbfile E:\item\car\AT45DB041D\eeprom.c
 0000                   .dbfunc e eeprom_write_byte _eeprom_write_byte fV
 0000           ;         ucData -> R18
 0000           ;        address -> R16,R17
                        .even
 0000           _eeprom_write_byte::
 0000                   .dbline -1
 0000                   .dbline 5
 0000           ; #include <iom16v.h>
 0000           ; #include <macros.h>
 0000           ; 
 0000           ; void eeprom_write_byte(unsigned int address,unsigned char ucData)
 0000           ; {
 0000           L2:
 0000                   .dbline 8
 0000           ;       /* 等待上一次写操作结束 */
 0000           ;       while(EECR & (1<<EEWE))
 0000           ;       ;
 0000           L3:
 0000                   .dbline 7
 0000 E199              sbic 0x1c,1
 0002 FECF              rjmp L2
 0004           X0:
 0004                   .dbline 10
 0004           ;       /* 设置地址和数据寄存器 */
 0004           ;       EEAR = address;
 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 address 16 i
 0010                   .dbend
 0010           ; }