eeprom读写.s

ICC mega8例子

	.module EEPROM读写.c
	.area text(rom, con, rel)
	.dbfile E:\xiaozhiyong2009\设计资料\项目设计\ICCAVR_mega8_C\ICCAVR_mega8_EEPROM读写\EEPROM读写.c
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 9
; //ICC-AVR application builder : 2009-3-12 17:39:42
; // Target : M8
; // Crystal: 8.0000Mhz
; 
; #include <iom8v.h>
; #include <macros.h>
; 
; void port_init(void)
; {
	.dbline 10
;  PORTB = 0x00;
	clr R2
	out 0x18,R2
	.dbline 11
;  DDRB  = 0x00;
	out 0x17,R2
	.dbline 12
;  PORTC = 0x00; //m103 output only
	out 0x15,R2
	.dbline 13
;  DDRC  = 0x00;
	out 0x14,R2
	.dbline 14
;  PORTD = 0x00;
	out 0x12,R2
	.dbline 15
;  DDRD  = 0x00;
	out 0x11,R2
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline -1
	.dbline 20
; }
; 
; //call this routine to initialize all peripherals
; void init_devices(void)
; {
	.dbline 22
;  //stop errant interrupts until set up
;  CLI(); //disable all interrupts
	cli
	.dbline 23
;  port_init();
	rcall _port_init
	.dbline 25
; 
;  MCUCR = 0x00;
	clr R2
	out 0x35,R2
	.dbline 26
;  GICR  = 0x00;
	out 0x3b,R2
	.dbline 27
;  TIMSK = 0x00; //timer interrupt sources
	out 0x39,R2
	.dbline 28
;  SEI(); //re-enable interrupts
	sei
	.dbline -2
L2:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e eeprom_write _eeprom_write fV
;           data -> R18
;        address -> R16,R17
	.even
_eeprom_write::
	.dbline -1
	.dbline 40
;  //all peripherals are now initialized
; }
; 
; /*****************************************************************************
; 用    途:EEPROM读写程序
; Taget   :mega8
; crystal :8M
; 介    绍:
; *****************************************************************************/
; //eeprom写操作
; void eeprom_write(unsigned int address,unsigned char data)
; {
L4:
	.dbline 42
;  while(EECR&(1<<EEWE))
;  {;}
	.dbline 42
	.dbline 42
L5:
	.dbline 41
	sbic 0x1c,1
	rjmp L4
X0:
	.dbline 43
;  EEAR=address;
	out 0x1f,R17
	out 0x1e,R16
	.dbline 44
;  EEDR=data;
	out 0x1d,R18
	.dbline 45
;  EECR|=(1<<EEMWE);
	sbi 0x1c,2
	.dbline 46
;  EECR|=(1<<EEWE);
	sbi 0x1c,1
	.dbline -2
L3:
	.dbline 0 ; func end
	ret
	.dbsym r data 18 c
	.dbsym r address 16 i
	.dbend
	.dbfunc e eeprom_read _eeprom_read fc
;        address -> R16,R17
	.even
_eeprom_read::
	.dbline -1
	.dbline 50
; }
; //eeprom读操作
; unsigned char eeprom_read(unsigned int address)
; {
L8:
	.dbline 52
;  while(EECR&(1<<EEWE))
;  {;}
	.dbline 52
	.dbline 52
L9:
	.dbline 51
	sbic 0x1c,1
	rjmp L8
X1:
	.dbline 53
;  EEAR=address;
	out 0x1f,R17
	out 0x1e,R16
	.dbline 54
;  EECR|=(1<<EERE);
	sbi 0x1c,0
	.dbline 55
;  return EEDR;
	in R16,0x1d
	.dbline -2
L7:
	.dbline 0 ; func end
	ret
	.dbsym r address 16 i
	.dbend
	.dbfunc e main _main fV
;              i -> R10
	.even
_main::
	.dbline -1
	.dbline 59
; }
; //****************************************************************************
; void main()
; {
	.dbline 61
;  unsigned char i;
;  port_init();
	rcall _port_init
	.dbline 62
;  init_devices();
	rcall _init_devices
	.dbline 64
;  
;  eeprom_write(1,0x55);
	ldi R18,85
	ldi R16,1
	ldi R17,0
	rcall _eeprom_write
	.dbline 65
;  eeprom_write(2,0xAA);
	ldi R18,170
	ldi R16,2
	ldi R17,0
	rcall _eeprom_write
	.dbline 66
;  i=eeprom_read(1);
	ldi R16,1
	ldi R17,0
	rcall _eeprom_read
	.dbline 67
;  PORTB=i;
	out 0x18,R16
	.dbline 68
;  i=eeprom_read(2);
	ldi R16,2
	ldi R17,0
	rcall _eeprom_read
	mov R10,R16
	.dbline 69
;  PORTD=i;
	out 0x12,R16
L12:
	.dbline 71
;  while(1)
;  {
	.dbline 72
;   ;
	.dbline 73
;  }
L13:
	.dbline 70
	rjmp L12
X2:
	.dbline -2
L11:
	.dbline 0 ; func end
	ret
	.dbsym r i 10 c
	.dbend
; }