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53 lines
959 B
53 lines
959 B
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#define RECV_OVERFLOW 10 // preamb + postamb + ?
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#define RESYNC_LEN 10 // size of rcv default buffer
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//*********** ASYNC PROTOCOL DEFINITIONS AND STRUCTURES *****************
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#define SOH_BCAST 0x01
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#define SOH_DEST 0x02
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// if a type field exists, OR in this bit (i.e. TCP/IP, IPX)
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#define SOH_TYPE 0x80
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// if the frame went through coherency, OR in this bit
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#define SOH_COMPRESS 0x40
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// if the frame has escape characters removed (ASCII 0-31) set this.
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#define SOH_ESCAPE 0x20
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#define SYN 0x16
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#define ETX 0x03
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//*********** FRAME STRUCTURES
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typedef struct preamble preamble;
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struct preamble {
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UCHAR syn;
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UCHAR soh;
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};
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typedef struct postamble postamble;
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struct postamble {
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UCHAR etx;
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UCHAR crclsb;
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UCHAR crcmsb;
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};
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//*** Frame parsing....
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#define ETHERNET_HEADER_SIZE 14
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//*** Ethernet type header
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typedef struct ether_addr ether_addr;
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struct ether_addr {
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UCHAR dst[6];
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UCHAR src[6];
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};
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