eeprom.lst

meg16 的所有功能实例

__text_start:
__start:
    002A E5CF      LDI	R28,0x5F
    002B E0D4      LDI	R29,4
    002C BFCD      OUT	0x3D,R28
    002D BFDE      OUT	0x3E,R29
    002E 51C0      SUBI	R28,0x10
    002F 40D0      SBCI	R29,0
    0030 EA0A      LDI	R16,0xAA
    0031 8308      STD	Y+0,R16
    0032 2400      CLR	R0
    0033 E6E0      LDI	R30,0x60
    0034 E0F0      LDI	R31,0
    0035 E010      LDI	R17,0
    0036 36E0      CPI	R30,0x60
    0037 07F1      CPC	R31,R17
    0038 F011      BEQ	0x003B
    0039 9201      ST	R0,Z+
    003A CFFB      RJMP	0x0036
    003B 8300      STD	Z+0,R16
    003C E5E4      LDI	R30,0x54
    003D E0F0      LDI	R31,0
    003E E6A0      LDI	R26,0x60
    003F E0B0      LDI	R27,0
    0040 E010      LDI	R17,0
    0041 35E4      CPI	R30,0x54
    0042 07F1      CPC	R31,R17
    0043 F021      BEQ	0x0048
    0044 95C8      LPM
    0045 9631      ADIW	R30,1
    0046 920D      ST	R0,X+
    0047 CFF9      RJMP	0x0041
    0048 940E004B  CALL	_main
_exit:
    004A CFFF      RJMP	_exit
FILE: 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
(0001) /****************************************Copyright (c)**************************************************
(0002) **                               ADEmbed Development Co.,LTD.                                    
(0003) **                                 http://www.adembed.com
(0004) **--------------File Info-------------------------------------------------------------------------------
(0005) ** File name:			EEPROM.c
(0006) ** Last modified Date:  2008-12-13
(0007) ** Last Version:		1.0
(0008) ** Descriptions:		IC inside EEPROM write and read test.
(0009) ** 
(0010) **------------------------------------------------------------------------------------------------------
(0011) ** Created by:			junbolu
(0012) ** Created date:		2008-12-13
(0013) ** Version:				1.0
(0014) ** Descriptions:		
(0015) **
(0016) **------------------------------------------------------------------------------------------------------
(0017) ** Modified by:
(0018) ** Modified date:
(0019) ** Version:
(0020) ** Descriptions:
(0021) **
(0022) **------------------------------------------------------------------------------------------------------
(0023) **ICC-AVR application builder : 2008-12-13
(0024) **Target : M16
(0025) **Crystal: 7.3728Mhz
(0026) **
(0027) **
(0028) **描述：这是一个读写片内EEPROM的测试程序。
(0029) **      没有一点多余的代码，清晰明了。
(0030) **
(0031) **涉及知识点：
(0032) **          EEPROM
(0033) **          
(0034) **          
(0035) *******************************************************************************************************/
(0036) #include <iom16v.h>
(0037) #include <macros.h>
(0038) #include "define.h"
(0039) #include "EEPROM.h"
(0040) 
(0041) 
(0042) void main(void)
(0043) {
(0044)  EEPROM_write(0x01,0x66);          //在地址0x01写入0x66
_main:
    004B E626      LDI	R18,0x66
    004C E001      LDI	R16,1
    004D E010      LDI	R17,0
    004E D005      RCALL	_EEPROM_write
(0045)  EEPROM_read(0x01);				   //读取地址0x01的数据
    004F E001      LDI	R16,1
    0050 E010      LDI	R17,0
    0051 D00C      RCALL	_EEPROM_read
(0046)  while(1);
    0052 CFFF      RJMP	0x0052
    0053 9508      RET
(0047) }
(0048) 
(0049) //=======================================================================
(0050) void EEPROM_write(uint16 address,uint8 data)
(0051) {
(0052)  SREG&=~0x80;
_EEPROM_write:
  data                 --> R18
  address              --> R16
    0054 94F8      BCLR	7
(0053)  while(EECR&(1<<EEWE))
    0055 99E1      SBIC	0x1C,1
    0056 CFFE      RJMP	0x0055
(0054)   {
(0055)   }
(0056)  EEAR=address;
    0057 BB1F      OUT	0x1F,R17
    0058 BB0E      OUT	0x1E,R16
(0057)  EEDR=data;
    0059 BB2D      OUT	0x1D,R18
(0058)  EECR|=(1<<EEMWE);
    005A 9AE2      SBI	0x1C,2
(0059)  EECR|=(1<<EEWE);
    005B 9AE1      SBI	0x1C,1
(0060)  SREG|=0x80;
    005C 9478      BSET	7
    005D 9508      RET
(0061) }
(0062) 
(0063) //=======================================================================
(0064) uint8 EEPROM_read(uint16 address)
(0065) {
(0066)  SREG&=~0x80;
_EEPROM_read:
  address              --> R16
    005E 94F8      BCLR	7
(0067)  while(EECR&(1<<EEWE))
    005F 99E1      SBIC	0x1C,1
    0060 CFFE      RJMP	0x005F
(0068)   {
(0069)   }
(0070)  EEAR=address;
    0061 BB1F      OUT	0x1F,R17
    0062 BB0E      OUT	0x1E,R16
(0071)  EECR|=(1<<EERE);
    0063 9AE0      SBI	0x1C,0
(0072)  SREG|=0x80;
    0064 9478      BSET	7
(0073)  return EEDR;
FILE: <library>
    0065 B30D      IN	R16,0x1D
    0066 9508      RET