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I have a problem that i cannot solve. I need to compare two bit values. Lets say: bit Low = 0; bit High = 1; But I get some really strange results if I try to compare both of them: Low == High will result in a 0 Low != High will also result in a 0 (expected 1) High == Low will result in a 1 High != Low will also result in a 1 (expected 0) (a compare with a constant like Low == 0 will work correctly) It semms that I allways get the value of the first bit, but not the value of the comparison. Same here with sbit operations. But the C51 User Guide tells me: ~~~ The following operations may be executed with bit-type operands: [...] Compare bit with bit or constant (==, !=) ~~~ So whats the problem here ?
If you are doing this in the debugger, you need to use the eval command if you want to evaluate an expression. Otherwise, the debugger just returns the value of the first operand. Jon