Keil C problem - Electronic Circuits Projects Diagrams Free

sarang1_in · 23rd February 2005, 03:10 PM

Hi all.
I am facing this problem.
If I am using following syntax, logically it is ok, but it is generating a wrong asm code via keil C51.
Problem 1

ACC = ACC + B;
This statement works fine with C.
Now I thought it will generate

ADD A, B;
but it is generating

MOV A, B;
ADD A, B;

Problem 2
this C code also involving ACC without my wish.

ACC = z;
B = 0;
if(ACC<100)
...
this is generating following asm code

MOV A, z(0X0A)
CLR A;
MOV B, A;
this is not what i want.
if I interchange the first 2 lines it works OK. Why so?

Problem 3
I want the DA A command to take place in my code after the addition what I will have to do?
As I want to convert the result in decimal and form that I want to show it on LCD. (DEC to ASCII is quite simple)
I tried lot of C code variations which show correct result as far as only C is concerned but they arte generating absurd AS code and nothing is working.
Please suggest something.

**kinjalgp** · 24th February 2005, 02:05 AM

Try writing your code in in-line assembly.

sarang1_in · 24th February 2005, 03:59 AM

Yes. Thanks Kinjal. You are surely there to help all of us again.
I found that there is only way to do it.
Thanks again.

dudeshan · 27th February 2005, 05:05 AM

try posting at 8052.com also.

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23rd February 2005, 03:10 PM	(permalink)
sarang1_in	Keil C problem Hi all. I am facing this problem. If I am using following syntax, logically it is ok, but it is generating a wrong asm code via keil C51. Problem 1 ACC = ACC + B; This statement works fine with C. Now I thought it will generate ADD A, B; but it is generating MOV A, B; ADD A, B; Problem 2 this C code also involving ACC without my wish. ACC = z; B = 0; if(ACC<100) ... this is generating following asm code MOV A, z(0X0A) CLR A; MOV B, A; this is not what i want. if I interchange the first 2 lines it works OK. Why so? Problem 3 I want the DA A command to take place in my code after the addition what I will have to do? As I want to convert the result in decimal and form that I want to show it on LCD. (DEC to ASCII is quite simple) I tried lot of C code variations which show correct result as far as only C is concerned but they arte generating absurd AS code and nothing is working. Please suggest something. __________________ Microcontroller codes, schematics, and diagrams!

24th February 2005, 02:05 AM	(permalink)
kinjalgp	Try writing your code in in-line assembly. __________________ "There is no way to peace, peace is the way!"

24th February 2005, 03:59 AM	(permalink)
sarang1_in	Yes. Thanks Kinjal. You are surely there to help all of us again. I found that there is only way to do it. Thanks again. __________________ Microcontroller codes, schematics, and diagrams!

27th February 2005, 05:05 AM	(permalink)
dudeshan	8052.com try posting at 8052.com also. __________________ !!! Keep Moving !!!