Djnz r5 $什么意思
Webr7的初始值是18h,执行语句djnz r7,next后,r7的值是 ( ) a.19h b.18h c.17h d.1 1年前 1个回答 英语翻译金属铸件图纸求解翻译金属铸件图纸上的 怎么翻译 2X VARIABLE RADIUS BLEND R7.5±0. WebDJNZ是減一不為零轉移指令(dec 1 jump if not zero): DJNZ Rn rel DJNZ direct. rel 此指令是將操作數的內容減1,然後判斷操作數的結果,若操作數為零,則順序執行程序,不為零則程序轉移。根據DJNZ指令的功能:每執行一次DJNZ RO, IDATALOOP就將R0的值減1,若R0的值不為0則就跳到 ...
Djnz r5 $什么意思
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WebMar 31, 2012 · djnz r6,delay2 ; 循环200次 djnz r5,delay1 ; 循环50次 故延时总计:123 x 200 x 10 x 2 个指令周期(djnz 双周期指令) r7,r6,r5 都=0后,子程序返回。这时r7=0,《djnz r7,loop;重点求解》执行后,r7=#0ffh, 所以《djnz r7,loop;重点求解》以下的代码永远不会执行。 WebOct 3, 2024 · 1. 点亮第一个led灯 org 0000h ljmp main main: clr p2.0 ljmp main end 2. led闪烁 org 0000h ljmp main delay: mov r5,#2 mov r6,#0 mov r7,#0 delayloop: nop;延时程序 djnz r7,delayloop djnz r6,delayloop djnz r5,delayloop ret main: clr p2.0 lcall delay setb p2.0 lcall delay ljmp main end
WebNov 11, 2006 · 作者: maychang 于 2006/11/11 2:04:00 发布:. $在某些51的汇编语言里表示本条指令的地址. DJNZ R6,$ 意思是 R6减一,不为零跳转到本条指令 (为零执行下一条 … WebMOV R6,#200 BACK:MOV R5,#100 HERE:DJNZ R5, HERE DJNZ R6,BACK END. advertisement. a) 100 b) 200 c) 20000 d) 2000 View Answer. Answer: c Explanation: It will be executed 200*100 times. 9. What is the meaning of the instruction MOV A,05H? a) data 05H is stored in the accumulator
Web随着手上的客户越来越多,很多外贸人表示有些客户聊天的时候很爱用缩写,“Just FYI, AKA,G2G.....”这些你都知道什么意思吗? 以下整理了A到Z常用英语缩写,从此远 … WebAug 28, 2015 · 用一个djnz的循环。org0000hmovr0,#1fh;r0指向20h单元movr5,#04h;四个数loop:incr0mov@r0,#0f0h写入djnzr5,loop和m+1单元存有两个bcd数,将它们合并到m单元中,编写程序完成。 ... org 0000h mov r0,#2fh 指向前一个单元mov r5,#0ah ;循环 10 loop:inc r0 add a,@r0 djnz r5,loop mov 50h,a end6.假定8 位二 ...
WebSince the DJNZ loop test control is at the end of the loop, all the operations for the loop happen on the zeroth time when the loop exits as they do all the previous times. This would be different if the loop test control was at the top (or head) of the loop. Thus, Huisman's answer is correct. Counting from Part1, the loop ends after:
WebMar 17, 2014 · C8051F560 DJNZ. When testing the C8051F560 with DJNZ in a timing loop I find that the DJNZ R5,$ gives a delay of 4 cycles (3 when R5 = 0), rather than the delay … palatine overnight parkingWebdjnz r7, $ djnz r6, $ - 4 djnz r5, $ - 8 ret;-----setb p1.7 acall dfra baidu biblioteklay ajmp start delay:mov r7,#250 d1:mov r6,#250 d2:djnz r6,d2 djnz r7,d1 ret end 开发板上的8只led为共阳极连接,即单片机输出端为低电平时即可点亮led。 程序a:;用最直接的方式实现流水灯 ... palatine opening hoursWebApr 22, 2010 · 单片机里的cjne djnz分别是指:. 1、cjne是比较不相等转移指令,一般应用方法为:. cjne a #b rel; 其作用是a中的数与b比较,如果a=b,顺序执行,否则转移到指定的标号处。. 由于这是一条3字节指令,程序的转移范围应以(pc)+3为起始地址的+127~-128共256字节单元地址 ... summer night lights employmentWeb- Lệnh DJNZ: Giảm và nhảy khi giá trị khác 0. Lệnh DJNZ thường dùng để tạo vòng lặp và có dạng sau: ... djnz R5,lap_delay_1 ret. Note: FFFF = 65535 D8F0h= 55536=-10000dec. Delay = 65536-55536 =10000 micro giay=10ms summer night gowns for ladiesWebSep 5, 2008 · $的意思是本行的地址 djnz r5 $ 的意思就是将r5的内容减1判断是否为0不为0返回本行继续执行 如果是0就向下执行 这两个的意思是一样的 palatine of hungarypalatine panthers footballWebDescription: DJNZ decrements the value of register by 1. If the initial value of register is 0, decrementing the value will cause it to reset to 255 (0xFF Hex). If the new value of … palatine panthers