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Sbit doest work

Amos Komolafe

Hello ALL

I need to access some of the bit positions of the SFR. But each time i tried to declare a variable of the type sbit , i get error C141: syntax error near sbit. I have read the manual and i even tried the statement : 

 sbit EA = 0xAF
but I still get the same error . Can someone help me out!!!

Thanks.

Parents
  • 0 in reply to Amos Komolafe

    Only SFRs with addresses that end in 0 or 8 are bit-addressable.

    Note that there are eight bits in a byte, and the bit addresses for SFR X0 range from X + 0 to X + 7, whereupon you reach SFR X8 with bits X8 + 0 to X8 + 7.

    There's method in the madness.

    For registers that are not bit addressable, you can set bits the good old fashioned way, with AND and OR operations. AND / OR also works on the SFRs with addressable bits.

Reply
  • 0 in reply to Amos Komolafe

    Only SFRs with addresses that end in 0 or 8 are bit-addressable.

    Note that there are eight bits in a byte, and the bit addresses for SFR X0 range from X + 0 to X + 7, whereupon you reach SFR X8 with bits X8 + 0 to X8 + 7.

    There's method in the madness.

    For registers that are not bit addressable, you can set bits the good old fashioned way, with AND and OR operations. AND / OR also works on the SFRs with addressable bits.

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