Coding pain

Is it possible to hard code a computer to feel pain? It seems like the answer is no. Even if we manage to develop super realistic robots, it seems we could only ever make them mimic the experience of feeling pain. After all, pain is a property only conscious creatures can experience, and a complicated entanglement of wires and silicon boards could never experience consciousness, right?

I don't know the answer to this question, and it may be true that the analogy between computing and the human brain could turn out to be quite simple and misleading. After all, Freud based a lot of his models of how the brain works on the steam engine. None the less, I've got a few pieces together which I think can help solve this problem.

1) Consciousness is not binary, it comes in a spectrum.  Bacteria --> Jellyfish --> Sheep --> Humans all have increasing consciousness, and sure, we can artificially draw a line somewhere, but it would be somewhat arbitrary especially since consciousness isn't rigorously defined.

2) It's tempting to think robots can only mimic the experience of pain - you could code the robot to quickly move its robotic hand from fire, despite it not experiencing the subjective experience of pain. But how can we be sure robots don't experience pain? It's a purely subjective experience that we can't measure with physical tools. It really bugs me to admit there might be some ethereal world of subjective experience caused by, but above the physical world.