I'm not familiar with the P89C66x but maybe you need to enable the xdata
memory first?
I see nothing wrong in the generated code.
> Hi
> I was trying to compile a small program for an 8051 variant (a test
> version
> of my large one) and I get strange results:
> #include "P89c66x.h"
>
> void usleep(unsigned char j)
> {
> // 1 = 3.12us
> unsigned char i;
> for ( i=0;i<=j;i++);
> }
>
> void main()
> {
> while(1) {
> P1=0xFE;
> usleep(100);
> P1=0xFF;
> usleep(100);
> }
> }
>
> This program blinks pin P1_0. If I compile it with the small memory model,
> the
> usleep function works perfectly but it does not if I use large memory
> model.
> Then the sleeping time is independent of the input number.
>
> The small sleep function is:
> _usleep:
> ar2 = 0x02
> ar3 = 0x03
> ar4 = 0x04
> ar5 = 0x05
> ar6 = 0x06
> ar7 = 0x07
> ar0 = 0x00
> ar1 = 0x01
> mov r2,dpl
> ; test_array.c:9: for ( i=0;i<=j;i++);
> mov r3,#0x00
> 00101$:
> clr c
> mov a,r2
> subb a,r3
> jc 00105$
> inc r3
> sjmp 00101$
> 00105$:
> ret
>
>
> The large function is the following:
> _usleep:
> ar2 = 0x02
> ar3 = 0x03
> ar4 = 0x04
> ar5 = 0x05
> ar6 = 0x06
> ar7 = 0x07
> ar0 = 0x00
> ar1 = 0x01
> mov a,dpl
> mov dptr,#_usleep_j_1_1
> movx @dptr,a
> ; test_array.c:9: for ( i=0;i<=j;i++);
> mov dptr,#_usleep_j_1_1
> movx a,@dptr
> mov r2,a
> mov r3,#0x00
> 00101$:
> clr c
> mov a,r2
> subb a,r3
> jc 00105$
> inc r3
> sjmp 00101$
> 00105$:
> ret
>
> I don't see anything in the code that should not work.
>
> Thanks
> Gudjon
>
> Ps. I will read through the P89c66x.h file and then contribute it. Thanks
> for
> the nice software :)
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