I would not call it "complete". Maybe "complete" in the sense that it works under perfect conditions, but not "complete" in any real sense. I don't see any erro

I would not call it "complete". Maybe "complete" in the sense that it works under perfect conditions, but not "complete" in any real sense. I don't see any error handling or power-up initialization, I don't see any DMA, I don't see any timeouts, I don't see any interrupts. I could write the same code in C and it would be just about as long.