dn_hdlc.h

00001 /*
00002 Copyright (c) 2014, Dust Networks. All rights reserved.
00003 
00004 HDLC library.
00005 
00006 \license See attached DN_LICENSE.txt.
00007 */
00008 
00009 #ifndef DN_HDLC_H
00010 #define DN_HDLC_H
00011 
00012 #include "dn_common.h"
00013 
00014 //=========================== defines =========================================
00015 
00016 // this table is used to expedite execution (at the expense of memory usage)
00017 static const uint16_t dn_hdlc_fcstab[256] = {
00018    0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
00019    0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
00020    0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
00021    0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
00022    0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
00023    0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
00024    0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
00025    0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
00026    0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
00027    0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
00028    0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
00029    0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
00030    0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
00031    0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
00032    0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
00033    0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
00034    0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
00035    0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
00036    0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
00037    0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
00038    0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
00039    0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
00040    0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
00041    0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
00042    0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
00043    0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
00044    0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
00045    0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
00046    0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
00047    0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
00048    0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
00049    0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
00050 };
00051 
00052 #define DN_HDLC_FLAG                   0x7e
00053 #define DN_HDLC_ESCAPE                 0x7d
00054 #define DN_HDLC_ESCAPE_MASK            0x20
00055 #define DN_HDLC_CRCINIT                0xffff
00056 #define DN_HDLC_CRCGOOD                0xf0b8
00057 
00058 #define DN_HDLC_MAX_FRAME_LENGTH       128
00059 #define DN_HDLC_INPUT_BUFFER_SIZE      DN_HDLC_MAX_FRAME_LENGTH
00060 
00061 //=========================== typedef =========================================
00062 
00063 typedef void (*dn_hdlc_rxFrame_cbt)(uint8_t* rxFrame, uint8_t rxFrameLen);
00064 
00065 //=========================== variables =======================================
00066 
00067 //=========================== prototypes ======================================
00068 
00069 #ifdef __cplusplus
00070  extern "C" {
00071 #endif
00072 
00073 void dn_hdlc_init(dn_hdlc_rxFrame_cbt rxFrame_cb);
00074 // output
00075 void dn_hdlc_outputOpen();
00076 void dn_hdlc_outputWrite(uint8_t b);
00077 void dn_hdlc_outputClose();
00078 
00079 #ifdef __cplusplus
00080 }
00081 #endif
00082 
00083 #endif
00084