Pinned Loading

1. Arduino: Port Manipulation Arduino: Port Manipulation

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   // DDRD (R/W) pin direction (0 = INPUT / 1 = OUTPUT)

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   // PORTD (R/W) pin state (INPUT: 0 = LOW / 1 = HIGH | OUTPUT: 0 = PULL-UP DIACTIVATED / 1 = PULL-UP ACTIVATED)

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   // PIND (R) pin state (INPUT ONLY: 0 = LOW / 1 = HIGH)

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   // bit(n)                                 // calculates value of n-th bit (returns: 0 / 1)