Keil compiler doesn't allow us to use sbit in declaration file (.h - header) So I am using bit in declaration of 1-bit variable in my .h (header) file and sbit in definition (.c) file for sfr . I am working on a critical project so will this cause any problem while executing on hardware?? If yes, when??
Please look, I am using as follows:
File 1: var1.h #define a= 0x125D;
extern unsigned char bdata obc; extern unsigned char idata b;
extern bit val0; extern bit val1; extern bit val2; extern bit val3; extern bit val4; extern bit val5; extern bit val6; extern bit val7;
File 2: var1.c #include "var1.h"
unsigned char bdata obc; unsigned char idata b;
sbit val0= obc^0; sbit val1= obc^1; sbit val2= obc^2; sbit val3= obc^3; sbit val4= obc^4; sbit val5= obc^5; sbit val6= obc^6; sbit val7= obc^7;
File 3: MyProg.c
#include "var1.h"
void main
{.......... ...........
if cond...1 {........ ......... ......... }
else if cond..2 {...... ....... obc=XBYTE[a] & b; ....... ....... }
else {........ ......... ......... }
......... ......... }
** void main(void) not only void main
Please look at the instructions for posting source code!
See: www.danlhenry.com/.../keil_code.png to help you.
Thank you :)
File 1: var1.h
#define a= 0x125D; extern unsigned char bdata obc; extern unsigned char idata b; extern bit val0; extern bit val1; extern bit val2; extern bit val3; extern bit val4; extern bit val5; extern bit val6; extern bit val7;
File 2: var1.c
#include "var1.h" unsigned char bdata obc; unsigned char idata b; sbit val0= obc^0; sbit val1= obc^1; sbit val2= obc^2; sbit val3= obc^3; sbit val4= obc^4; sbit val5= obc^5; sbit val6= obc^6; sbit val7= obc^7;
#include "var1.h" void main(void) {.......... ........... if cond...1 {........ ......... ......... } else if cond..2 {...... ....... obc=XBYTE[a] & b; ....... ....... } else {........ ......... ......... } ......... ......... }
Tool set is c51
As shown, C51 does allow you to have sbit definitions in a header file.
It does not allow me to use sbit as extern sbit in File 1: var1.h for above case.
What do you mean, "does not allow me" ?
Show the exact, complete error message you get; and identify the line to which it relates
See: http://www.keil.com/forum/63979/
If you look at the Keil example, you'll see that they don't use extern with their sbit declarations ...
exampole on internet<code> static bit done_flag = 0; /* bit variable */
bit testfunc ( /* bit function */ bit flag1, /* bit arguments */ bit flag2) { . . . return (0); /* bit return value */ }