Problem with Port 6 of 80c517 in Keil C51 Compiler

[onde]

80c517

Hi,

I have a problem with the Keil C51-Compiler:
If I write
sbit RS = P6^1;
I got the following error:
MAIN.C(8): error C146: 'P6': invalid base address
If I change it to:
sbit RS = P5^1;
it compiles correctly.

In reg517.h P6 is defined as followed:
sfr P6 = 0xFA;

So that should not be the problem.
I can use P6 like P6=1 in Programms, but it seems P6 is not bitadressable??
So what´s the Problem, is there something special I do not know with the 80c517 on Port 6 or is it a Problem with the Compiler???
Pse help,

thx onde

 

[micro_tools]

Re: P6 and 80c517 (Keil)

Hi,

Port P6 is NOT bit adressable ( see data sheet )

Possible solution snippet code is

ACC = P6;
ACC_6 = 1;
ACC_0 = 0;
...
P6 = ACC;

Note : If you use COM2 this will not work