Hi I m recieving the serial port data by using the scanf command and then running a loop for inserting the delay the character got from serial port will determeine the delay But the problem i m facing is that though the data recieved from serial port changes but the delay remains constant...... to change the delay i have to reburn the prog... My program is #include<reg51.h> #include<stdio.h> #include<ctype.h> sbit P10=P1^0; int k; /* Inser delay*/ void delay() int i,j; P2=k; for(i=0;i<1;i++) { for(j=o;j<k;j++) { i=i; } } } void main (void) int j; char ch, i; P1=0; #ifndef MONITOR51 SCON=0x50; TCON=0X40; TMOD |=0X20; TH1=253; TR1=1; TI=1; #endif while (1) { scanf("%c",ch); i=SBUF; K=toint(i) P10=0; delay(); P10=1; delay(); } } Any one who can help me in debigguging the problem
I' sure you would like a simple answer, but that is impossible with the mess above. a couple of comments 1) you run a timer, but do not use it for anything 2) the delay routine only has internal cariables - how can it ever chaneg. Erik
Please copy and paste the code you are actually using.
"the delay routine only has internal cariables - how can it ever chaneg." What about 'k'?
What about 'k'? Missed it, as I have so often before, when someone does not have the time to use meaningful names. I still wonder what the timer is supposed to do and, regardless a delay routine (with ot without 'k') in C can never be calculated. Erik
k inside delay() and K in the main loop, am I missing something here? There also seem to be some missing braces but it's late and I'm having a beer so I'm not going to look to closely. The earlier comment about the timer is a big hint. If you want a time delay start with the 8051 hardware and add C as needed. I assume you're using P10 with a scope to monitor timing?
Thank u alot i got my problems solved....... thanx again uzma