PIC16887A单片机单片机U1为主控发送,从动接收,U2为从动接收,产控发送的双机通信:开始时,由U1担任主控方,向从动方U2发送字符”hello!”,发送完毕并转为同步从动接收状态,如接收到的字符为”How are you?”则LED闪亮,通信结束.U2开始时被设置为同步从动接收状态,收到7个字符并确认接收的字符为”hello!”后,再转为主控发送方式,回送字符”How are you?”,进入LED闪亮状态,通信结束-U1 is the master SCM SCM PIC16887A sent slave receiver, U2 is driven receiving, production control to send the two-plane communication: the beginning, as the master side by the U1, U2 sends to the slave side characters " hello!" , Send receiving end and converted to synchronize slave state, such as the received character is " How are you?"　the LED flashes, communication ended. U2 is set to synchronize the start of the slave state of receiving and confirm the receipt of 7 characters received The characters " hello!"　and then sent into the master mode to send characters back to " How are you?" , enter the LED flashing status, communication end