i want use if satement, to do something for the one time, example:
main(){ char k; k=0;
while(1){
if(k==0){ printfLCD("please only one time\n"); k=1; }//end if
printfLCD("test message\n");
}//end while }//end main
but it isnt work, program enters the if statement infinite time. where is the error?, there is anyything about keilc51, which is i dont know? i use upsd3434 8051 microcontroler, sory for my nglish
i dont know using debugger, i can started debug sesion and go step to step, but i only see on the monitor,the mcu special data registers(r0 r1 .. r7 ,a ,b psw) how can i fallow my variables changing when debugging?
how can i fallow my variables changing when debugging I know that 'read' is a 4 letter word, but, unfortunately the answer to your question is "read the documentation for the debugger". Any debugger without the ability to view a variable, would be too ridiculous to even be released.
Erik
how can i fallow my variables changing when debugging?
The debugger should offer the ability to "watch" variables and memory locations, as well as "view" whole ranges of memory.
If it doesn't, throw it out and get one that does.
If after extensive reads, you find it doesn't, throw it out and get one that does.
I do not know how much I know of that has been "thrown out" because the user did not take the time to 'find' a feature. I recall some post somewhere "xxx is a piece of crap, it can not .... I threw it out" to which the response was "as stated in the manual, click x>y>z and it is right there.
the post from the OP "i can started debug sesion ... but i only see" clearly indicates that reading the documentation is considered "unnecessary" or "troublesome" or maybe even "not cool"
maybe i can say troublesome
ok. firstly i will study on debugging , then you can see my questions later.
finally i want to write my last question;
xdata unsigned int *ptr _at_ 0x8000; is this valid? or is this useful?
for example; *(ptr) = 10;
*(ptr+1) = 11;
where are the 10 and 11 values ,in xdata
your 'condtruct is wrong, here is a "cheat sheet" extracted from my definition file
// pointer in data in #define U8DI unsigned char idata * data // data idata #define U8DX unsigned char xdata * data // data xdata #define U8IX unsigned char xdata * idata // idata xdata #define U8XX unsigned char xdata * xdata // xdata xdata #define U8IC unsigned char code * idata // idata code #define U8DC unsigned char code * data // data code #define U8XC unsigned char code * xdata // xdata code #define U8CC unsigned char code * code // code code