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📁 测试18b20的程序
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	.module _1.c
	.area data(ram, con, rel)
_disp_table::
	.blkb 2
	.area idata
	.byte 63,6
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 91,'O
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 'f,'m
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 125,7
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 127,'o
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 'w,124
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 57,94
	.area data(ram, con, rel)
	.blkb 2
	.area idata
	.byte 'y,'q
	.area data(ram, con, rel)
	.dbfile C:\DOCUME~1\Administrator\桌面\18b20\1.c
	.dbsym e disp_table _disp_table A[16:16]c
	.area text(rom, con, rel)
	.dbfile C:\DOCUME~1\Administrator\桌面\18b20\1.c
	.dbfunc e delay_1us _delay_1us fV
	.even
_delay_1us::
	.dbline -1
	.dbline 44
; /*  m818b20.c   2004-11-19   
;   本程序为采用mega8 和18b20的温度采集程序 
;   选用mega8内部8M RC震荡，18b20 数据线接pd6,数据线和vcc间接一4.7k上拉电阻 
;   感谢dfgeoff 嗜血蜗牛提供的资料*/ 
; 
; #include <iom16v.h> //和单片机类型相对应的头文件，选择Atmega8做实验； 
; #include <macros.h> 
; #define uchar unsigned char 
; #define uint unsigned int 
; void init_1820(); 
; write_1820(uchar x); 
; uchar read_1820(); 
; void send_byte(uchar x); 
; void delay(uint x); 
; void disp_led(uchar buffer,uchar control); 
; uchar  disp_table[16] = { 
;    0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, 
;    0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; 
; uchar dp; 
; long count; 
; #define LCD_EN_PORT    PORTA   //以下2个要设为同一个口
; #define LCD_EN_DDR     DDRA
; #define LCD_RS_PORT    PORTA   //以下2个要设为同一个口
; #define LCD_RS_DDR     DDRA
; #define LCD_DATA_PORT  PORTA   //以下3个要设为同一个口
; #define LCD_DATA_DDR   DDRA    //一定要用高4位
; #define LCD_DATA_PIN   PINA
; #define LCD_RS         (1<<0) //   port0      out
; #define LCD_EN         (1<<1) //  port1       out
; #define LCD_DATA       ((1<<4)|(1<<5)|(1<<6)|(1<<7)) //0xf0 
; /*函数说明
; ------------------------------------------------------------------------------*/
; void LCD_init(void);
; void LCD_en_write(void);
; void LCD_write_command(unsigned  char command) ;
; void LCD_write_data(unsigned char data);
; void LCD_set_xy (unsigned char x, unsigned char y);
; void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);
; void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data);
; void delay_nus(unsigned int n);
; void delay_nms(unsigned int n);
; /*----------------------------------------------------------------------------*/
; void delay_1us(void)                 //1us延时函数
;   {
	.dbline 45
;    asm("nop");
	nop
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e delay_nus _delay_nus fV
;              i -> R20,R21
;              n -> R22,R23
	.even
_delay_nus::
	xcall push_gset2
	movw R22,R16
	.dbline -1
	.dbline 49
;   }
; 
; void delay_nus(unsigned int n)       //N us延时函数
;   {
	.dbline 50
;    unsigned int i=0;
	clr R20
	clr R21
	.dbline 51
;    for (i=0;i<n;i++)
	xjmp L6
L3:
	.dbline 52
	xcall _delay_1us
L4:
	.dbline 51
	subi R20,255  ; offset = 1
	sbci R21,255
L6:
	.dbline 51
	cp R20,R22
	cpc R21,R23
	brlo L3
	.dbline -2
L2:
	xcall pop_gset2
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r n 22 i
	.dbend
	.dbfunc e delay_1ms _delay_1ms fV
;              i -> R16,R17
	.even
_delay_1ms::
	.dbline -1
	.dbline 56
;    delay_1us();
;   }
;   
; void delay_1ms(void)                 //1ms延时函数
;   {
	.dbline 58
	clr R16
	clr R17
	xjmp L11
L8:
	.dbline 58
L9:
	.dbline 58
	subi R16,255  ; offset = 1
	sbci R17,255
L11:
	.dbline 58
;    unsigned int i;
;    for (i=0;i<1140;i++);
	cpi R16,116
	ldi R30,4
	cpc R17,R30
	brlo L8
	.dbline -2
L7:
	.dbline 0 ; func end
	ret
	.dbsym r i 16 i
	.dbend
	.dbfunc e delay_nms _delay_nms fV
;              i -> R20,R21
;              n -> R22,R23
	.even
_delay_nms::
	xcall push_gset2
	movw R22,R16
	.dbline -1
	.dbline 62
;   }
;   
; void delay_nms(unsigned int n)       //N ms延时函数
;   {
	.dbline 63
;    unsigned int i=0;
	clr R20
	clr R21
	.dbline 64
;    for (i=0;i<n;i++)
	xjmp L16
L13:
	.dbline 65
	xcall _delay_1ms
L14:
	.dbline 64
	subi R20,255  ; offset = 1
	sbci R21,255
L16:
	.dbline 64
	cp R20,R22
	cpc R21,R23
	brlo L13
	.dbline -2
L12:
	xcall pop_gset2
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r n 22 i
	.dbend
	.dbfunc e LCD_init _LCD_init fV
	.even
_LCD_init::
	.dbline -1
	.dbline 71
;    delay_1ms();
;   }
; 
; 
; /*----------------------------------------------------------------------------*/
; void LCD_init(void)         //液晶初始化
; {
	.dbline 72
;   LCD_DATA_DDR|=LCD_DATA;   //数据口方向为输出
	in R24,0x1a
	ori R24,240
	out 0x1a,R24
	.dbline 73
;   LCD_EN_DDR|=LCD_EN;       //设置EN方向为输出
	sbi 0x1a,1
	.dbline 74
;   LCD_RS_DDR|=LCD_RS;       //设置RS方向为输出
	sbi 0x1a,0
	.dbline 75
;   LCD_write_command(0x28); 
	ldi R16,40
	xcall _LCD_write_command
	.dbline 76
;   LCD_en_write();
	xcall _LCD_en_write
	.dbline 77
;   delay_nus(40);
	ldi R16,40
	ldi R17,0
	xcall _delay_nus
	.dbline 78
;   LCD_write_command(0x28);  //4位显示
	ldi R16,40
	xcall _LCD_write_command
	.dbline 79
;   LCD_write_command(0x0c);  //显示开
	ldi R16,12
	xcall _LCD_write_command
	.dbline 80
;   LCD_write_command(0x01);  //清屏
	ldi R16,1
	xcall _LCD_write_command
	.dbline 81
;   delay_nms(2);
	ldi R16,2
	ldi R17,0
	xcall _delay_nms
	.dbline -2
L17:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e LCD_en_write _LCD_en_write fV
	.even
_LCD_en_write::
	.dbline -1
	.dbline 86
; }
; 
; /*----------------------------------------------------------------------------*/
; void LCD_en_write(void)  //液晶使能
; {
	.dbline 87
;   LCD_EN_PORT|=LCD_EN;
	sbi 0x1b,1
	.dbline 88
;   delay_nus(1);
	ldi R16,1
	ldi R17,0
	xcall _delay_nus
	.dbline 89
;   LCD_EN_PORT&=~LCD_EN;
	cbi 0x1b,1
	.dbline -2
L18:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e LCD_write_command _LCD_write_command fV
;        command -> R20
	.even
_LCD_write_command::
	xcall push_gset1
	mov R20,R16
	.dbline -1
	.dbline 94
; }
; 
; /*----------------------------------------------------------------------------*/
; void LCD_write_command(unsigned char command) //写指令
; {
	.dbline 95
;   delay_nus(16);
	ldi R16,16
	ldi R17,0
	xcall _delay_nus
	.dbline 96
;   LCD_RS_PORT&=~LCD_RS;        //RS=0
	cbi 0x1b,0
	.dbline 97
;   LCD_DATA_PORT&=0X0f;         //清高四位
	in R24,0x1b
	andi R24,15
	out 0x1b,R24
	.dbline 98
;   LCD_DATA_PORT|=command&0xf0; //写高四位
	mov R24,R20
	andi R24,240
	in R2,0x1b
	or R2,R24
	out 0x1b,R2
	.dbline 99
;   LCD_en_write();
	xcall _LCD_en_write
	.dbline 100
;   command=command<<4;          //低四位移到高四位
	mov R24,R20
	andi R24,#0x0F
	swap R24
	mov R20,R24
	.dbline 101
;   LCD_DATA_PORT&=0x0f;         //清高四位
	in R24,0x1b
	andi R24,15
	out 0x1b,R24
	.dbline 102
;   LCD_DATA_PORT|=command&0xf0; //写低四位
	mov R24,R20
	andi R24,240
	in R2,0x1b
	or R2,R24
	out 0x1b,R2
	.dbline 103
;   LCD_en_write();
	xcall _LCD_en_write
	.dbline -2
L19:
	xcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r command 20 c
	.dbend
	.dbfunc e LCD_write_data _LCD_write_data fV
;           data -> R20
	.even
_LCD_write_data::
	xcall push_gset1
	mov R20,R16
	.dbline -1
	.dbline 108
;   
; }
; /*----------------------------------------------------------------------------*/
; void LCD_write_data(unsigned char data) //写数据
; {
	.dbline 109
;   delay_nus(16);
	ldi R16,16
	ldi R17,0
	xcall _delay_nus
	.dbline 110
;   LCD_RS_PORT|=LCD_RS;       //RS=1
	sbi 0x1b,0
	.dbline 111
;   LCD_DATA_PORT&=0X0f;       //清高四位
	in R24,0x1b
	andi R24,15
	out 0x1b,R24
	.dbline 112
;   LCD_DATA_PORT|=data&0xf0;  //写高四位
	mov R24,R20
	andi R24,240
	in R2,0x1b
	or R2,R24
	out 0x1b,R2
	.dbline 113
;   LCD_en_write();
	xcall _LCD_en_write
	.dbline 114
;   data=data<<4;               //低四位移到高四位
	mov R24,R20
	andi R24,#0x0F
	swap R24
	mov R20,R24
	.dbline 115
;   LCD_DATA_PORT&=0X0f;        //清高四位
	in R24,0x1b
	andi R24,15
	out 0x1b,R24
	.dbline 116
;   LCD_DATA_PORT|=data&0xf0;   //写低四位
	mov R24,R20
	andi R24,240
	in R2,0x1b
	or R2,R24
	out 0x1b,R2
	.dbline 117
;   LCD_en_write();
	xcall _LCD_en_write
	.dbline -2
L20:
	xcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r data 20 c
	.dbend
	.dbfunc e LCD_set_xy _LCD_set_xy fV
;        address -> R20
;              y -> R20
;              x -> R22
	.even
_LCD_set_xy::
	xcall push_gset2
	mov R20,R18
	mov R22,R16
	.dbline -1
	.dbline 121
; }
; /*----------------------------------------------------------------------------*/
; void LCD_set_xy( unsigned char x, unsigned char y )  //写地址函数
; {
	.dbline 123
;     unsigned char address;
;     if (y == 0) address = 0x80 + x;
	tst R20
	brne L22
	.dbline 123
	mov R20,R22
	subi R20,128    ; addi 128
	xjmp L23
L22:
	.dbline 124
;     else   address = 0xc0 + x;
	mov R20,R22
	subi R20,64    ; addi 192
L23:
	.dbline 125
;     LCD_write_command( address);
	mov R16,R20
	xcall _LCD_write_command
	.dbline -2
L21:
	xcall pop_gset2
	.dbline 0 ; func end
	ret
	.dbsym r address 20 c
	.dbsym r y 20 c
	.dbsym r x 22 c
	.dbend
	.dbfunc e LCD_write_string _LCD_write_string fV
;              s -> R20,R21
;              Y -> R10
;              X -> R22
	.even
_LCD_write_string::
	xcall push_gset3
	mov R10,R18
	mov R22,R16
	ldd R20,y+6
	ldd R21,y+7
	.dbline -1
	.dbline 129
; }
; /*----------------------------------------------------------------------------*/
; void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s) //列x=0~15,行y=0,1
; {
	.dbline 130
;     LCD_set_xy( X, Y ); //写地址    
	mov R18,R10
	mov R16,R22
	xcall _LCD_set_xy
	xjmp L26
L25:
	.dbline 132
	.dbline 133
	movw R30,R20
	ldd R16,z+0
	xcall _LCD_write_data
	.dbline 134
	subi R20,255  ; offset = 1
	sbci R21,255
	.dbline 135
L26:
	.dbline 131
;     while (*s)  // 写显示字符
	movw R30,R20
	ldd R2,z+0
	tst R2
	brne L25
	.dbline -2
L24:
	xcall pop_gset3
	.dbline 0 ; func end
	ret
	.dbsym r s 20 pc
	.dbsym r Y 10 c
	.dbsym r X 22 c
	.dbend
	.dbfunc e LCD_write_char _LCD_write_char fV
;           data -> y+4
;              Y -> R22
;              X -> R20
	.even
_LCD_write_char::
	xcall push_gset2
	mov R22,R18
	mov R20,R16
	.dbline -1
	.dbline 141
;     {
;       LCD_write_data( *s );
;       s ++;
;     }
;       
; }
; 
; /*----------------------------------------------------------------------------*/
; void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data) //列x=0~15,行y=0,1
; {
	.dbline 142
;   LCD_set_xy( X, Y ); //写地址
	mov R18,R22
	mov R16,R20
	xcall _LCD_set_xy
	.dbline 143
;   LCD_write_data( data);
	ldd R16,y+4
	xcall _LCD_write_data
	.dbline -2
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#18b20 #测试 #程序
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