eeprom_r_w.s

环保型IC卡门禁系统的C程序

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