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hi i got the following error while trying to link there is no compilation error the source code is
void timer0(void) interrupt 1 { TR0=0;//stop timer if(loadstatus==1 && onehour==0) //if motor is running and one hour has not gone increment the timer { if(count<20) // count++; else { count=0; if(sec<59) sec+=1; else { sec=0; if(min<59) min+=1; else min=0; } } } else { if(counterstate==1) { if(count>0) count--; else { count=19; if(sec>0) sec--; else { sec=59; if(min>0) min--; } } } } TH0=0x4B;//value loaded to timer is for 1/20 sec delay TL0=0xFD; TR0=1;//start timer }
the error generated is
*** ERROR L121: IMPROPER FIXUP MODULE: charge.obj (CHARGE) SEGMENT: ABSOLUTE OFFSET: 000BH
plz help me and give me solution soon
the file name of the code is charge.c and the keil project name is also charge. the code i have posted is related to the error. i saw the list file created after compilation of the source code. no, i have used two interrupts, interrupt 1 and interrupt 3, both defined in the similar way, interrupt 1 named timer0 and interrupt 3 named timer1. do the use of two interrupts make differences in the compilation? there are two linking errors one for each interrupt subroutine. i have posted the error and the source code for only one error. i thought fixing the one will give me the way to fix the other
Why did you think that using the source code tags to format your reply would be a good idea?
Did you actually follow the link that Per suggested? Did you read the post - and the two knowledgebase articles that it references?
Did you look-up the error code L121 in the Linker Manual: http://www.keil.com/support/man/docs/bl51/bl51_l121.htm http://www.keil.com/support/man/docs/lx51/lx51_l121.htm
i tried them both but i can't find any helpful tips there. ya there is a similar problem to mine, but there is no solution. i tried using only one interrupt but the linking error persists.
i don't know where is the linker manual. plz any one give me some solutions is there any other c- compiler for 8051? i think it is the problem of keil. in the list file every function starts with address 0000h
You could post the minimal project that shows the fault. I can then have a closer lok.
Of course I mean "look".
"i don't know where is the linker manual." Did you follow the two links you got from Andy? They point to specific pages in the linker manual.
And did you notice the "See also" information accessible from my link?
i tried them all. i saw all the links deeper inside to find the solution. there is no any solution.
i changed my code as follows if it could solve the problem, but the problem persists.
void timer0(void) interrupt 1 { tr0(); }
tr0() is a new function which is called when timer 0 interrupt overflows. i put all the commands in the interrupt subroutine in the function tr0() but the problem is same. i am in hurry and i am giving my all the time to solve the problem. but failed each time
Really?
Did you actually read them thoroughly and carefully?
Did you think about how what they said might apply to your situation?
They said:
"This error occurs when an instruction tries do make a memory access that is outside the scope of this instruction (for example MOVX @Ri outside of the PDATA page, or ACALL outside of the 2KB code memory block)."
Have you checked to see if this might apply to your situation?
Did you thoroughly and carefully read the linked pages which give examples?
That is your problem!
This is not trivial stuff! You need to spend time studying the manuals and gaining familiarity with the tools before you will be able to use them effectively!
"is there any other c- compiler for 8051?"
Yes, there are many - but you will always get yourself into the sames kinds of mess if you just try to jump in without proper study/preparation.
"i think it is the problem of keil."
No, it is the problem of insufficient study.