problem in initilise static variable

"I have add the INIT.A51 & STARTUP.A51 files.But still i have facing the same problem (i.e. static variable not initilise to proper value)."

Including those files in your project will not make any difference unless you modify them.

"I have add the INIT.A51 & STARTUP.A51 files.But still i have facing the same problem (i.e. static variable not initilise to proper value)."

Including those files in your project will not make any difference unless you modify them.

hi,

Thanks to all for immediate reply.
"Including those files in your project will not make any difference unless you modify them"

What modification i have to make?

Regards,
Pandurang S.

those required for your chip

here is an example for a f12x

STARTUP1:

;----------------------------------------------------------------
; Watchdog Timer Configuration
           mov   SG_WDTCN,#0DEh        ; Disable WDT
           mov   SG_WDTCN,#0ADh        ; takes 2 writes

; CROSSBAR REGISTER CONFIGURATION
           mov   SG_SFRPAGE,#00Fh
           mov   SF_XBR0, #004h                   ; XBAR0: UART0 enabled
           mov   SF_XBR1, #00ch                   ; XBAR1: INT0, T1 to port pin
           mov   SF_XBR2, #040h                   ; XBAR2: crossbar enbl & non-mpx memory
; Select Pin I/0
           mov SG_SFRPAGE, #00Fh;
           mov SF_P0MDOUT, #011h ; Output configuration for SG_P0 TxD PP, remaining open drain
           mov SF_P1MDOUT, #0ffh ; Output configuration for SG_P1 all are push-pull
           mov SF_P2MDOUT, #0ffh ; Output configuration for SG_P2 all are push-pull
           mov SF_P3MDOUT, #0ffh ; Output configuration for SG_P3 all are push-pull
           mov SF_P4MDOUT, #0c3h ; Output configuration for SF_P4 mixed
           mov SF_P5MDOUT, #0ffh ; Output configuration for SF_P5 all are push-pull
           mov SF_P6MDOUT, #0ffh ; Output configuration for SF_P6 all are push-pull
           mov SF_P7MDOUT, #0ffh ; Output configuration for SF_P7 all are open drain

           mov SF_P1MDIN, #0FFh  ; Input configuration for P1

           mov   SG_SFRPAGE,#000h
           mov   S0_EMI0CF,#038h    ; External Memory Configuration Register


; Oscillator Configuration
; internaql oswcillator, system clock = 48MHz
    mov    SG_SFRPAGE,#000h
    mov    S0_FLSCL,#090h
    mov    SG_SFRPAGE,#00fh
    orl    SF_PLL0CN,#001h
    mov    SF_PLL0DIV,#001h
    mov    SF_PLL0FLT,#021h
    mov    SF_PLL0MUL,#002h
    clr    A                     ; Wait 5us for initialization
    djnz   SG_ACC, $
    orl    SF_PLL0CN,    #002h
Pll_Wait:
    mov    A,SF_PLL0CN
    jnb    SG_ACC.4,Pll_Wait
    mov    SF_OSCICN,#083h
    mov    SF_CLKSEL,#002h

           mov   SG_SFRPAGE,#000h
           mov   S0_RSTSRC,#002h       ; Reset Source Register
           mov   S0_EMI0TC,#000h       ; External Memory Timing

; clear (i)data

Hi Erik,

Thanks once again.
The example you given quite same as the config file generated by cofig2.
But still i am not clear how to init static variable (may be to 0 or other than 0 value) that are used in a function,which is call by my main function.
What is the relation betn the example u given & library files(init.a51 & startup.a51).

Regards,
Pandurang S.

Hi Erik,... the example u given

I can not comment on an example given by micro.

Erik

Hi,

Leave the part of example.
"But still i am not clear how to init static variable (may be to 0 or other than 0 value) that are used in a function,which is call by my main function."


Regards,
Pandurang S.

Hi,

In my code when i have define the static variable in the internal memory with keyword idata, then the varable is initilise to proper value but when it come to xdata during 2nd trial(for testing i again define it to extermnal memory) it is not initilise to the value other than 0.

Regards,
Pandurang S.

then the varable is initilise to proper value but when it come to xdata during 2nd trial(for testing i again define it to extermnal memory) it is not initilise to the value other than 0.

This is getting ridiculous

HOW OFTENM DO I HAVE TO REPEAT?

If the external memory is not configured at the beginning of (a private copy of)startup.a51 variables in external memory will NOT be initialized.

Erik

"This is getting ridiculous

HOW OFTENM DO I HAVE TO REPEAT?

If the external memory is not configured at the beginning of (a private copy of)startup.a51 variables in external memory will NOT be initialized."

But we have already established that the derivative in question defaults to using internal XDATA, so that does not appear to be the problem.

If the external memory is configured before startup clear and ljmp ?C_START it will not be initialized.

My experience is that if it is configured before startup clear and ljmp ?C_START it will be initialized. Also that would be the way the Keil software should work.

Thus I see no other place that would affect the issue.

Who knows (I refer to f12x for my knowledge) what SFR if the f020 could have a hidden effect re memory access.

Erik

"If the external memory is configured before startup clear and ljmp ?C_START it will not be initialized."

"My experience is that if it is configured before startup clear and ljmp ?C_START it will be initialized."

Those statements appear to be in complete contradiction. What are you trying to say?