eeprom.s

meg16 的所有功能实例

	.module EEPROM.c
	.area text(rom, con, rel)
	.dbfile E:\MYWORK~1\开发设计\EasyAVR\程序范例\Mega16程序包\完成整理\内部EEPROM实验\EEPROM.c
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 43
; /****************************************Copyright (c)**************************************************
; **                               ADEmbed Development Co.,LTD.                                    
; **                                 http://www.adembed.com
; **--------------File Info-------------------------------------------------------------------------------
; ** File name:			EEPROM.c
; ** Last modified Date:  2008-12-13
; ** Last Version:		1.0
; ** Descriptions:		IC inside EEPROM write and read test.
; ** 
; **------------------------------------------------------------------------------------------------------
; ** Created by:			junbolu
; ** Created date:		2008-12-13
; ** Version:				1.0
; ** Descriptions:		
; **
; **------------------------------------------------------------------------------------------------------
; ** Modified by:
; ** Modified date:
; ** Version:
; ** Descriptions:
; **
; **------------------------------------------------------------------------------------------------------
; **ICC-AVR application builder : 2008-12-13
; **Target : M16
; **Crystal: 7.3728Mhz
; **
; **
; **描述：这是一个读写片内EEPROM的测试程序。
; **      没有一点多余的代码，清晰明了。
; **
; **涉及知识点：
; **          EEPROM
; **          
; **          
; *******************************************************************************************************/
; #include <iom16v.h>
; #include <macros.h>
; #include "define.h"
; #include "EEPROM.h"
; 
; 
; void main(void)
; {
	.dbline 44
;  EEPROM_write(0x01,0x66);          //在地址0x01写入0x66
	ldi R18,102
	ldi R16,1
	ldi R17,0
	xcall _EEPROM_write
	.dbline 45
;  EEPROM_read(0x01);				   //读取地址0x01的数据
	ldi R16,1
	ldi R17,0
	xcall _EEPROM_read
L2:
	.dbline 46
L3:
	.dbline 46
	xjmp L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e EEPROM_write _EEPROM_write fV
;           data -> R18
;        address -> R16,R17
	.even
_EEPROM_write::
	.dbline -1
	.dbline 51
;  while(1);
; }
; 
; //=======================================================================
; void EEPROM_write(uint16 address,uint8 data)
; {
	.dbline 52
;  SREG&=~0x80;
	bclr 7
L6:
	.dbline 54
	.dbline 55
L7:
	.dbline 53
;  while(EECR&(1<<EEWE))
	sbic 0x1c,1
	rjmp L6
	.dbline 56
;   {
;   }
;  EEAR=address;
	out 0x1f,R17
	out 0x1e,R16
	.dbline 57
;  EEDR=data;
	out 0x1d,R18
	.dbline 58
;  EECR|=(1<<EEMWE);
	sbi 0x1c,2
	.dbline 59
;  EECR|=(1<<EEWE);
	sbi 0x1c,1
	.dbline 60
;  SREG|=0x80;
	bset 7
	.dbline -2
L5:
	.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 65
; }
; 
; //=======================================================================
; uint8 EEPROM_read(uint16 address)
; {
	.dbline 66
;  SREG&=~0x80;
	bclr 7
L10:
	.dbline 68
	.dbline 69
L11:
	.dbline 67
;  while(EECR&(1<<EEWE))
	sbic 0x1c,1
	rjmp L10
	.dbline 70
;   {
;   }
;  EEAR=address;
	out 0x1f,R17
	out 0x1e,R16
	.dbline 71
;  EECR|=(1<<EERE);
	sbi 0x1c,0
	.dbline 72
;  SREG|=0x80;
	bset 7
	.dbline 73
;  return EEDR;
	in R16,0x1d
	.dbline -2
L9:
	.dbline 0 ; func end
	ret
	.dbsym r address 16 i
	.dbend