里面有两个代码，一个是CAN总线的单帧的发送，另一个是CAN总线的单帧的接收代码，使用的硬件是C8051F040的单片机。这两个代码也能实现两单片机的通信。-Inside there are two codes, one of the single-frame CAN bus of the sending and the other is the single-frame CAN bus receive the code, using the hardware is C8051F040 microcontroller. These two codes can also achieve the two microcontroller communication.