How to set MCON register in DS5000T from sw applikation

I think your code should be:

#pragma disable
void set_mcon (void)
{
TA    = 0xAA; // timed access
TA    = 0x55;
MCON |= 0x02; // paa=1
MCON  = 0xD8; // partition adr 6000h
TA    = 0xAA; // timed access
TA    = 0x55;
MCON &= ~0x02; // paa=0
}

Hi Jon!
Thanks for your answer!
It would work in a small memory model!
But I'm using the large memory model.

Here is the test sequence:
1.With the set_mcon(),placed right after the declaration of varibles in main().
2.mcon = 0xcc
3.start the program
-> program did't run(for long) and mcon = 0x08 now.

I think I know the reason!
The problem are that I can't run set_mcon(),
before the declaration of varibles, and most of them are stored in xdata. That failes due to MCON = 0xCC(ece2=1).

Is it possible run set_mcon() before any xdata access?

thanks
Pih Lung

Memory layout configuration doesn't belong into main(). Not into any C code at all, usually.

Instead, you should do it by modifying startup.a51 accordingly.

Thanks Hans-Bernhard
I could set ece2=0 from the startup.a51
/Pih Lung

Hi,

I having the same problem as you i.e. setting the partition from sw application.

You mentioned setting ece2=1 in startup.a51, hope you can explain how and where you set it ?

Thanks

Hi dfg gdf!

I put this code in the end of the startup.a51 file to set Mcon=88.

PUSH PSW

MOV TA,#0AAH
MOV TA,#055H
ORL MCON,#02H
MOV MCON,#088H
MOV TA,#0AAH
MOV TA,#055H
ANL MCON,#0FDH

POP PSW
MOV EA,C
END

Remember to set the right xdata start adr. in the beginning of the file.
XDATASTART EQU 4000H

Pih Lung

Hi,
I copied the set of codes, but it didn't work well.
a) Should I place the set of codes before or after "LJMP ?C_START"
b) for "MOV EA, C", what is C, I gave it the value of #1. Is this correct ?
c) In addition, I placed the following at the start of my codes
MCON DATA 0C6H
TA DATA 0C7H
PSW DATA 0D0H
d) Earlier, you mentioned "void set_mcon (void)", should this be invoked in the main() or commented out?

Thanks.

hi
a,b) right after
LJMP ?C_START

SETB C
JBC EA,?C0158
CLR C
?C0158:
PUSH PSW
MOV TA,#0AAH
MOV TA,#055H
ORL MCON,#02H
MOV MCON,#088H
MOV TA,#0AAH
MOV TA,#055H
ANL MCON,#0FDH
POP PSW
MOV EA,C
END
c) my defines

EA EQU 0xAF
PSW EQU 0xD0
TA EQU 0xC7
MCON EQU 0xC6

d) commented out

/Pih Lung

Hi,

Thanks for your complete codes, but it still doesn't work.

I debug and step-through. It seems that placing the MCON codes after LJMP ?C_START, will skip directly to main() without executing MCON codes.

I tried to place it in other areas but no success.

Am I missing something, for example should I configure additional parameters in the project options or should I use particular optimizations or memory model ?

I am using small memomry model for Compact code rom size, optmization is 9, favour speed.

Hope to hear from you.
TIA

Hi
My Project options:
Device: use BL51 linker, not the LX51.
Target: large, large, no OS.
BL51 locate: code 0x0-0x3fff,
xdata 0x4000-0x7fff
code optim:6 or 8, but it has nothing to do with setting ECE2 in MCON,
same thing with startup.a51 code.

In the beginning of main()
EA=0;
MCON &= ~ECE2;
EA=1;
or set the original state of EA.

This work for me!
Pih Lung