So you want to say, I can shift left or right whole contents of an array?
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Re: How to do bitwise shift across several variables/array members?
So you want to say, I can shift left or right whole contents of an array?
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Re: How to do bitwise shift across several variables/array members?
Are you using the shiftout command? If so you can select MSB or LSB first.
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Re: How to do bitwise shift across several variables/array members?
No, there is no "one command way" to shift or rotate bits spanning multiple members of an an array. You will have to write some code to do that.
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Re: How to do bitwise shift across several variables/array members?
Start with the least significant byte, use the Shift-Left "<<", then check the STATUS Register Carry bit to see if you have to add one to the more significant byte after shifting.
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Re: How to do bitwise shift across several variables/array members?
I'm thinking it in the following way (as example, 2 byte array, shifted to right)
1. Read both array bytes into variables A and B
2. Shift B right 1 bit
3. Add LSB from A as MSB to B
4. Shift A right
5. Write A and B back to array
Repeat as desired.
Correct?
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Re: How to do bitwise shift across several variables/array members?
Yes, assuming you really do want a shift and don't want to rotate the value shifted out of B back into the MSB of the array.
There's no need to copy the array bytes to A and B, but if it helps you keep it straight then go for it.
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