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ISD51 problems

chen yu

1.I can't access PORT1,PORT2 from the debugger;

2.Can I use the "printf" function to send something to the serial window of the debugger?

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    sorry,in problem one I mean:
    In ISD51's single-stepping mode, I can access PORT0 and PORT3 from the debugger,but"I can't access PORT1,PORT2 ";

    here is the ISD51 Features:
    Controlled program execution with single-stepping and multiple software breakpoints.
    Viewing and changing CPU registers and memory.
    Access to Special Function Registers (SFRs).

    In factory, I have studied the ISD51.a51--there are no programs about changing the SFR of P1,P2 at all! why?

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    sorry,in problem one I mean:
    In ISD51's single-stepping mode, I can access PORT0 and PORT3 from the debugger,but"I can't access PORT1,PORT2 ";

    here is the ISD51 Features:
    Controlled program execution with single-stepping and multiple software breakpoints.
    Viewing and changing CPU registers and memory.
    Access to Special Function Registers (SFRs).

    In factory, I have studied the ISD51.a51--there are no programs about changing the SFR of P1,P2 at all! why?

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