看着没人回复,我自己就再回复一下,我今天又仔细看了一遍文档,终于找到关于ACK的描述了,并且已检验到,现在正在努力通信中,希望香主看到了,回复一下鼓励一下:lol
附:文档关于ACK的描述
ack:acknowledge (1 bit at ‘1’). The receiver must send the not-acknowledge
value if it has detected a parity error (NACK: not acknowledge = 1 bit at ‘0’), or
it is not yet ready.