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/etc/nginx/nginx.conf.求大神帮我注释一下 每行都是什么意思【单片机吧】_百度贴吧
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求大神帮我注释一下 每行都是什么意思收藏
以下内存定义;温度BCD码存在34H（百位），33H（十位），32H（个位）;读入字节放在值存在36h为首地址的内存，共9字节;温度值存在31h(高8位），30h（低8位） org 00h wendu:mov a,#00h;清内存mov r0,#30hmov r1,#16qingRAM:mov @r0,ainc r0djnz r1,qingRAM kaishi:mov 2ch,34h;将BCD码放入查表指针
mov 2bh,33h
mov 2ah,32h
call settimecewen:nop调用启动传感器子程序 mov r1,#100;扫描数码管约800ms，等待测温完成deng:nop调用数码管显示子程序djnz r1,dengnop调用温度读取程序nop调用BCD码转换程序nop以上是主程序 ;*********************************************;以下是启动传感器转换程序qidong:CALL复位
A, #0CCH;发 SKIP ROM命令
R6, #34H; 延时104us
DJNZ R6, $
MOV A, #44H;发启动测温命令
CALL WRITE
MOV R6, #34H;延时104us
DJNZ R6, $
RET;以上是启动传感器转换程序;******************************************;以下读取温度结果子程序jieguo:CALL复位
MOV A, #0CCH ;发 SKIP ROM命令
CALL WRITE
MOV R6, #34H ;延时104us
MOV A, #0BEH ;发读取转换结果命令
CALL WRITE
R6, #34H;延时104us
MOV R5, #02H;从传感器读取9字节数据（包含温度）
R0, #36H;温度结果存在36H为首地址的内存区
B,#00H jieguo1:
CALL READ;调用读取一个字节子程序
MOV @R0, A;保存温度结果
R0;修改保存内存指针
R5, jieguo1取完9字节的结果？
MOV A, 36h;保存温度信息低字节
MOV 30h, A
A, 37h;保存温度信息高字节
MOV 31h, AjieguoOUT: RET;以上读取温度结果子程序;*********************************************;以下是BCD码转换程序;先判断温度的正负，如正，进行BCD码转换，如负，显示000;若温度高字节最高位为1，则是负温度值;为正时，取高字节低4位、低字节高4位，即为温度值bcd: mov a,31h
jb acc.7,温度正、负？ ;为正，则进行BCD码调整zheng:取高字节低4位，低字节高4位，合成一个字节放在acc
anl a,#0f0h
orl a,#0fh
anl a,#0fh
orl a,#0f0h
mov b,#100;BCD码转换
mov 34h,a;存百位BCD码
mov 33h,a;存十位BCD码
mov 32h,b;存个位BCD码
ret fu:mov 32h,#00h;为负，则置BCD码内存单元为0
mov 33h,#00h
mov 34h,#00h
ret;以上是BCD码转换程序;********************************************;以下复位DS18B20子程序;传感器接在P3.7reset:setb p3.7
NOPCLR p3.7MOV
R6, #0A0H; 延时480usDJNZ
R6, #0A0HDJNZ R6, $SETB
R6, #32H ; 延时70usDJNZ
R6,#3CHLOOP1820:MOV
C, p3.7JC resetoutDJNZ
R6,LOOP1820MOV
R6, #064H; 延时200usDJNZ
resetRET resetout:SETB
RET;以上复位DS18B20子程序;*********************************************************;以下写DS18B20的程序（写入一个字节）;传感器接在P3.7write:MOV R7, #08H;一个字节8位
NOPwriteLOP: CLR p3.7
MOV R6, #07H; 延时 15us
DJNZ R6, $
MOV p3.7, C
MOV R6, #34H; 延时 104us
DJNZ R6, $
DJNZ R7, writeLOP
RET;以上写DS18B20的程序（写入一个字节）;**********************************************************;以下读DS18B20的程序,（读出一个字节的数据）;传感器接在P3.7read:
MOV R7, #08H;一个字节8位
NOPREADLOOP: CLR p3.7
R6, #07H; 延时15us
R6, #3CH;延时DELAY 120us
R7, READLOOP
R6, #3CH;DELAY 120us
RET;以上读DS18B20的程序,（读出一个字节的数据） ;***************************************************;以下是1ms延时子程序delay1ms:mov r2,#20
more:mov r3,#250
djnz r2,more
ret;以上是1ms延时;********************************************************;***********************************************;以下是查表子程序;查表指针：2ch，百位；2bh，十位；2ah，个位;查表后得到的显示数据：3ch，百位；3bh，十位；3ah，个位 chabiao:mov dptr,#shuju
mov a,2查表百位movc a,@a+dptr
mov a,2查表十位
movc a,@a+dptr
mov a,2查表个位
movc a,@a+dptr
ret shuju:db 0c0h,0f9h,0a4h,0b0h,99h,92h,83h,0f8h,80h,98h;
9;以上是查表子程序 ;***********************************************************;以下数码管显示子程序settime:call chabiao
setb p3.4;关显示器
mov a,3扫描百位
clr p3.4 call delay11ms延时 setb p3.4;关百位 mov a,3扫描十位 mov p0,aclr p3.5 call delay1ms
setb p3.5 mov a,3扫描个位mov p0,aclr p3.6 call delay1mssetb p3.6 ret
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