Compare bits in assembly
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26-10-2019 - |
Question
How can I compare two bits if they are equal or not in 8051? I need to jump if two bits are equal. I have a value in a register and I am searching if this value is equal another constant value. Example: I have "EDh" value and I have another value in R0 register.
Solution
To compare a register and an immediate (a constant), and then conditionally jump, you can use the CJNE
instruction.
OTHER TIPS
It's been a long time since I worked with the 8051. But I seem to remember that the CJNE instruction was quite useful.
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