实现SJA1000T内部的接收缓冲区只有64B ,所以在程序中定义了容纳32个Frame结构体数组can- rbuf [ ]并组成环形缓冲区。同时也定义了相同大小的数组eth- rbuf [ ]组成以太网接收的环形缓冲区。 -Internal receive buffer to achieve SJA1000T only 64B, it is defined in the program structure to accommodate an array of Frame 32 can-rbuf [] and the formation of the ring buffer. Also defines the size of the array of the same eth-rbuf [] composed of Ethernet receive ring buffer.