ds18b20.s

温度测量ds18b20.rar

	.module ds18b20.c
	.area text(rom, con, rel)
	.dbfile ..\..\..\..\PROTEU~2\5.avr\19.温度测量ds18b20\3.开搞ds18b20\ds18b20.c
	.dbfile D:\教程及心得\Proteus\PROTEU~2\5.avr\19.温度测量ds18b20\3.开搞ds18b20\ds18b20.c
	.dbfunc e reset _reset fV
	.even
_reset::
	.dbline -1
	.dbline 11
; /*
; 我自己写的ds18b20的驱动,暂时固定PORTC0口当总线口好了
; */
; #include <iom8v.h>
; #include <macros.h>
; #include "mydelay.h"
; #include "ds18b20.h"
; //一。单点测量只要有presense应答就可以了，多点测量以后再搞
; //1.reset
; void reset(void)
; {
	.dbline 12
;   DDRC=DDRC|0x01;//输出
	sbi 0x14,0
	.dbline 13
;   PORTC=PORTC&0xfe;//置0
	in R24,0x15
	andi R24,254
	out 0x15,R24
	.dbline 14
;   delay0ms500us();
	.dbline -2
L1:
	.dbline 0 ; func end
	rjmp _delay0ms500us
	.dbend
	.dbfunc e ReadPresense _ReadPresense fV
	.even
_ReadPresense::
	.dbline -1
	.dbline 18
; }
; //2.读取presense应答信号
; void ReadPresense(void)
; {
	.dbline 19
;   DDRC=DDRC&0xfe;//输入
	in R24,0x14
	andi R24,254
	out 0x14,R24
	.dbline 20
;   delay0ms60us();
	rcall _delay0ms60us
L3:
	.dbline 21
;   while((PINC&0x01)==0x00) ;//检测到了应答信号
L4:
	.dbline 21
	sbis 0x13,0
	rjmp L3
X0:
	.dbline -2
L2:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e rdbit _rdbit fc
;           data -> R20
	.even
_rdbit::
	st -y,R20
	.dbline -1
	.dbline 25
;   //delay0ms60us();
; }
; unsigned char rdbit(void)
; {
	.dbline 27
;   unsigned char data;
;   DDRC=DDRC|0x01;//输出
	sbi 0x14,0
	.dbline 28
;   PORTC=PORTC&0xfe;//置0
	in R24,0x15
	andi R24,254
	out 0x15,R24
	.dbline 29
;   delay0ms5us();//等待1us即可，为了照顾晶振，这里给5us
	rcall _delay0ms5us
	.dbline 31
;   //PORTC=PORTC|0x01;//置1
;   DDRC=DDRC&0xfe;//输入
	in R24,0x14
	andi R24,254
	out 0x14,R24
	.dbline 32
;   data=PINC&0x01;
	in R20,0x13
	andi R20,1
	.dbline 33
;   delay0ms15us();
	rcall _delay0ms15us
	.dbline 34
;   delay0ms60us();//读时隙不少于60us
	rcall _delay0ms60us
	.dbline 35
;  return (data);
	mov R16,R20
	.dbline -2
L6:
	.dbline 0 ; func end
	ld R20,y+
	ret
	.dbsym r data 20 c
	.dbend
	.dbfunc e rdbyte _rdbyte fc
;              j -> R12
;              i -> R20
;           data -> R10
	.even
_rdbyte::
	rcall push_xgset303C
	.dbline -1
	.dbline 38
; }
; unsigned char rdbyte(void)
; {
	.dbline 41
;   unsigned char data;
;   unsigned char i,j;
;   for(i=8;i>0;i--)
	ldi R20,8
	rjmp L11
L8:
	.dbline 42
;   {
	.dbline 43
;     j=rdbit();
	rcall _rdbit
	mov R12,R16
	.dbline 44
;     data=(data>>1)|(j<<7);
	mov R2,R12
	lsl R2
	lsl R2
	lsl R2
	lsl R2
	lsl R2
	lsl R2
	lsl R2
	mov R3,R10
	lsr R3
	or R3,R2
	mov R10,R3
	.dbline 45
;   }
L9:
	.dbline 41
	dec R20
L11:
	.dbline 41
	ldi R24,0
	cp R24,R20
	brlo L8
X1:
	.dbline 46
;   return (data);
	mov R16,R10
	.dbline -2
L7:
	.dbline 0 ; func end
	rjmp pop_xgset303C
	.dbsym r j 12 c
	.dbsym r i 20 c
	.dbsym r data 10 c
	.dbend
	.dbfunc e wtbit _wtbit fV
;           data -> R20
	.even
_wtbit::
	st -y,R20
	mov R20,R16
	.dbline -1
	.dbline 49
; }
; void wtbit(unsigned char data)
; {
	.dbline 50
;   DDRC=DDRC|0x01;//输出
	sbi 0x14,0
	.dbline 51
;   PORTC=PORTC&0xfe;//置0
	in R24,0x15
	andi R24,254
	out 0x15,R24
	.dbline 52
;   delay0ms5us();//等待1us即可，为了照顾晶振，这里给5us
	rcall _delay0ms5us
	.dbline 53
;   if (data==0x01) PORTC=PORTC|0x01;//置1
	cpi R20,1
	brne L13
X2:
	.dbline 53
	sbi 0x15,0
L13:
	.dbline 54
;   delay0ms60us();
	rcall _delay0ms60us
	.dbline 55
;   PORTC=PORTC|0x01;//拉高回来
	sbi 0x15,0
	.dbline 56
;   delay0ms60us();//时隙不少于60us
	rcall _delay0ms60us
	.dbline -2
L12:
	.dbline 0 ; func end
	ld R20,y+
	ret
	.dbsym r data 20 c
	.dbend
	.dbfunc e wtbyte _wtbyte fV
;              j -> R22
;              i -> R20
;           data -> R10
	.even
_wtbyte::
	rcall push_xgsetF00C
	mov R10,R16
	.dbline -1
	.dbline 59
; }
; void wtbyte(unsigned char data)
; {
	.dbline 61
;   unsigned char i,j;
;   for (i=8;i>0;i--)
	ldi R20,8
	rjmp L19
L16:
	.dbline 62
;   {
	.dbline 63
;     j=(data>>i)&0x01;
	mov R16,R10
	mov R17,R20
	rcall lsr8
	mov R22,R16
	andi R22,1
	.dbline 64
; 	wtbit(j);
	mov R16,R22
	rcall _wtbit
	.dbline 65
;   }
L17:
	.dbline 61
	dec R20
L19:
	.dbline 61
	ldi R24,0
	cp R24,R20
	brlo L16
X3:
	.dbline -2
L15:
	.dbline 0 ; func end
	rjmp pop_xgsetF00C
	.dbsym r j 22 c
	.dbsym r i 20 c
	.dbsym r data 10 c
	.dbend
	.dbfunc e convert _convert fV
	.even
_convert::
	.dbline -1
	.dbline 69
; }
; //启动温度转换
; void convert(void)
; {
	.dbline 70
;  reset();
	rcall _reset
	.dbline 71
;  ReadPresense();
	rcall _ReadPresense
	.dbline 72
;  wtbyte(0xcc);
	ldi R16,204
	rcall _wtbyte
	.dbline 73
;  wtbyte(0x44);
	ldi R16,68
	.dbline -2
L20:
	.dbline 0 ; func end
	rjmp _wtbyte
	.dbend
	.dbfunc e rdtemp _rdtemp fi
;            tmp -> <dead>
;           temp -> R10,R11
	.even
_rdtemp::
	st -y,R10
	st -y,R11
	.dbline -1
	.dbline 77
; }
; //读温度值
; unsigned int rdtemp(void)
; {
	.dbline 79
;  unsigned int temp,tmp;
;  reset();
	rcall _reset
	.dbline 80
;  ReadPresense();
	rcall _ReadPresense
	.dbline 81
;  wtbyte(0xcc);
	ldi R16,204
	rcall _wtbyte
	.dbline 82
;  wtbyte(0xbe);
	ldi R16,190
	rcall _wtbyte
	.dbline 87
;  //temp=rdbyte();
;  //tmp=temp;
;  //temp=rdbyte();
;  //temp=(temp<<8)|tmp;
;  PORTB=rdbyte();
	rcall _rdbyte
	out 0x18,R16
	.dbline 88
;  PORTD=rdbyte();
	rcall _rdbyte
	out 0x12,R16
	.dbline 89
;  return temp;
	movw R16,R10
	.dbline -2
L21:
	.dbline 0 ; func end
	ld R11,y+
	ld R10,y+
	ret
	.dbsym l tmp 1 i
	.dbsym r temp 10 i
	.dbend
; }