请问：
1.PHASE_ZERO到底怎么选？如果选0、15度或其他会怎么样？有没有什么原则？
// These Phase values represent the base Phase value of the sinewave for each
// one of the sectors (each sector is a translation of the hall effect sensors
// reading
#define PHASE_ZERO
57344
#define PHASE_ONE
((PHASE_ZERO + 65536/6) % 65536)
#define PHASE_TWO
((PHASE_ONE + 65536/6) % 65536)
#define PHASE_THREE
((PHASE_TWO + 65536/6) % 65536)
#define PHASE_FOUR
((PHASE_THREE + 65536/6) % 65536)
#define PHASE_FIVE
((PHASE_FOUR + 65536/6) % 65536)

2.PhaseOffset为什么大约22.5度？怎么得到的？

// In the sinewave generation algorithm we need an offset to be added to the
// pointer when energizing the motor in CCW. This is done to compensate an
// asymetry of the sinewave
int PhaseOffset = 4100;

希望各位能夠不吝賜教