What you need is the Bitwise operators "&" + "|" (OR).
Since you only want to output the lower bits of PORTB, you have to read PORTB first, mask out the lower bits, then OR the new bits in.
portb = (portb & %11110000) | (var & %00001111)
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|
What you need is the Bitwise operators "&" + "|" (OR).
Since you only want to output the lower bits of PORTB, you have to read PORTB first, mask out the lower bits, then OR the new bits in.
portb = (portb & %11110000) | (var & %00001111)
<br>
DT
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