eeprom读写.lst

ICC mega8例子

__text_start:
__start:
      13 E5CF      LDI	R28,0x5F
      14 E0D4      LDI	R29,4
      15 BFCD      OUT	0x3D,R28
      16 BFDE      OUT	0x3E,R29
      17 51CE      SUBI	R28,0x1E
      18 40D0      SBCI	R29,0
      19 EA0A      LDI	R16,0xAA
      1A 8308      STD	Y+0,R16
      1B 2400      CLR	R0
      1C E6E0      LDI	R30,0x60
      1D E0F0      LDI	R31,0
      1E E010      LDI	R17,0
      1F 36E0      CPI	R30,0x60
      20 07F1      CPC	R31,R17
      21 F011      BEQ	0x0024
      22 9201      ST	R0,Z+
      23 CFFB      RJMP	0x001F
      24 8300      STD	Z+0,R16
      25 E2E6      LDI	R30,0x26
      26 E0F0      LDI	R31,0
      27 E6A0      LDI	R26,0x60
      28 E0B0      LDI	R27,0
      29 E010      LDI	R17,0
      2A E000      LDI	R16,0
      2B BF0B      OUT	0x3B,R16
      2C 32E6      CPI	R30,0x26
      2D 07F1      CPC	R31,R17
      2E F021      BEQ	0x0033
      2F 95C8      LPM
      30 9631      ADIW	R30,1
      31 920D      ST	R0,X+
      32 CFF9      RJMP	0x002C
      33 D020      RCALL	_main
_exit:
      34 CFFF      RJMP	_exit
FILE: E:\xiaozhiyong2009\设计资料\项目设计\ICCAVR_mega8_C\ICCAVR_mega8_EEPROM读写\EEPROM读写.c
(0001) //ICC-AVR application builder : 2009-3-12 17:39:42
(0002) // Target : M8
(0003) // Crystal: 8.0000Mhz
(0004) 
(0005) #include <iom8v.h>
(0006) #include <macros.h>
(0007) 
(0008) void port_init(void)
(0009) {
(0010)  PORTB = 0x00;
_port_init:
      35 2422      CLR	R2
      36 BA28      OUT	0x18,R2
(0011)  DDRB  = 0x00;
      37 BA27      OUT	0x17,R2
(0012)  PORTC = 0x00; //m103 output only
      38 BA25      OUT	0x15,R2
(0013)  DDRC  = 0x00;
      39 BA24      OUT	0x14,R2
(0014)  PORTD = 0x00;
      3A BA22      OUT	0x12,R2
(0015)  DDRD  = 0x00;
      3B BA21      OUT	0x11,R2
      3C 9508      RET
(0016) }
(0017) 
(0018) //call this routine to initialize all peripherals
(0019) void init_devices(void)
(0020) {
(0021)  //stop errant interrupts until set up
(0022)  CLI(); //disable all interrupts
_init_devices:
      3D 94F8      BCLR	7
(0023)  port_init();
      3E DFF6      RCALL	_port_init
(0024) 
(0025)  MCUCR = 0x00;
      3F 2422      CLR	R2
      40 BE25      OUT	0x35,R2
(0026)  GICR  = 0x00;
      41 BE2B      OUT	0x3B,R2
(0027)  TIMSK = 0x00; //timer interrupt sources
      42 BE29      OUT	0x39,R2
(0028)  SEI(); //re-enable interrupts
      43 9478      BSET	7
      44 9508      RET
(0029)  //all peripherals are now initialized
(0030) }
(0031) 
(0032) /*****************************************************************************
(0033) 用    途:EEPROM读写程序
(0034) Taget   :mega8
(0035) crystal :8M
(0036) 介    绍:
(0037) *****************************************************************************/
(0038) //eeprom写操作
(0039) void eeprom_write(unsigned int address,unsigned char data)
(0040) {
(0041)  while(EECR&(1<<EEWE))
_eeprom_write:
  data                 --> R18
  address              --> R16
      45 99E1      SBIC	0x1C,1
      46 CFFE      RJMP	_eeprom_write
(0042)  {;}
(0043)  EEAR=address;
      47 BB1F      OUT	0x1F,R17
      48 BB0E      OUT	0x1E,R16
(0044)  EEDR=data;
      49 BB2D      OUT	0x1D,R18
(0045)  EECR|=(1<<EEMWE);
      4A 9AE2      SBI	0x1C,2
(0046)  EECR|=(1<<EEWE);
      4B 9AE1      SBI	0x1C,1
      4C 9508      RET
(0047) }
(0048) //eeprom读操作
(0049) unsigned char eeprom_read(unsigned int address)
(0050) {
(0051)  while(EECR&(1<<EEWE))
_eeprom_read:
  address              --> R16
      4D 99E1      SBIC	0x1C,1
      4E CFFE      RJMP	_eeprom_read
(0052)  {;}
(0053)  EEAR=address;
      4F BB1F      OUT	0x1F,R17
      50 BB0E      OUT	0x1E,R16
(0054)  EECR|=(1<<EERE);
      51 9AE0      SBI	0x1C,0
(0055)  return EEDR;
      52 B30D      IN	R16,0x1D
      53 9508      RET
(0056) }
(0057) //****************************************************************************
(0058) void main()
(0059) {
(0060)  unsigned char i;
(0061)  port_init();
_main:
  i                    --> R10
      54 DFE0      RCALL	_port_init
(0062)  init_devices();
      55 DFE7      RCALL	_init_devices
(0063)  
(0064)  eeprom_write(1,0x55);
      56 E525      LDI	R18,0x55
      57 E001      LDI	R16,1
      58 E010      LDI	R17,0
      59 DFEB      RCALL	_eeprom_write
(0065)  eeprom_write(2,0xAA);
      5A EA2A      LDI	R18,0xAA
      5B E002      LDI	R16,2
      5C E010      LDI	R17,0
      5D DFE7      RCALL	_eeprom_write
(0066)  i=eeprom_read(1);
      5E E001      LDI	R16,1
      5F E010      LDI	R17,0
      60 DFEC      RCALL	_eeprom_read
(0067)  PORTB=i;
      61 BB08      OUT	0x18,R16
(0068)  i=eeprom_read(2);
      62 E002      LDI	R16,2
      63 E010      LDI	R17,0
      64 DFE8      RCALL	_eeprom_read
      65 2EA0      MOV	R10,R16
(0069)  PORTD=i;
      66 BB02      OUT	0x12,R16
(0070)  while(1)
FILE: <library>
      67 CFFF      RJMP	0x0067
      68 9508      RET