{"id":25666,"date":"2023-10-26T22:46:05","date_gmt":"2023-10-26T14:46:05","guid":{"rendered":"https:\/\/www.modbus.cn\/?p=25666"},"modified":"2024-03-27T16:29:48","modified_gmt":"2024-03-27T08:29:48","slug":"modbus-tong-xin-xie-yi-de-wan-zheng-c-c-yuan-dai-ma-shi-li","status":"publish","type":"post","link":"https:\/\/www.modbus.cn\/en\/25666.html","title":{"rendered":"Modbus\u901a\u4fe1\u534f\u8bae\u7684\u5b8c\u6574C\/C++\u6e90\u4ee3\u7801\u793a\u4f8b"},"content":{"rendered":"\n

RXD<\/strong><\/h2>\n\n\n\n
#include \"ModBus.h\"\n\/******************************************************************\/\nStrRxd xdata sys_rxd;               \/\/\u5b9a\u4e49\u63a5\u6536\u5904\u7406\u7ed3\u6784\u4f53\n\/******************************************************************\/\n\/*******\u516c\u6709\u51fd\u6570***************************************************\/\nvoid    init_proc_rxd(void);        \/\/\u521d\u59cb\u5316\u4e32\u53e3\u901a\u4fe1\u53d8\u91cf\nvoid    process_rxd(void);          \/\/\u901a\u4fe1\u5904\u7406\u51fd\u6570\nvoid    init_serial(void);          \/\/\u521d\u59cb\u5316\u4e32\u53e3\n\/*******\u79c1\u6709\u51fd\u6570***************************************************\/\nuint8   read_sys_rxd(void);         \/\/\u8bfb\u63a5\u6536\u7f13\u51b2\u533a\nuint8   data_check(void);           \/\/\u6821\u9a8c\u548c\u68c0\u9a8c\nuint8   lenghchk(void);             \/\/\u6570\u636e\u957f\u5ea6\u68c0\u9a8c\nvoid    data_change(void);          \/\/\u6570\u636eASCII\u8f6c\u6362\u6210HEX\n\/******************************************************************\/\nvoid    init_proc_rxd(void)\/\/\u521d\u59cb\u5316\u4e32\u53e3\u901a\u4fe1\u53d8\u91cf\n{\n    uint8 idata i;\n    for( i = 0;i < POOLLEN;i++ )\n    {\n        \/\/\u8bfb\n\t\tsys_rxd.pool[i] = 0;\/\/\u63a5\u6536\u6570\u636e\u7f13\u51b2\u533a\n        sys_rxd.rec_buf[i] = 0;\/\/\u53bb\u9664\u5305\u5934\u5305\u5c3e\u540e\u7684\u6570\u636e\u4fdd\u7559\u533a\uff0c\u8fd9\u91cc\u53ea\u4fdd\u7559\u4e00\u5e27\u6709\u6548\u6570\u636e\n        \/\/\u5199\n\t\tsys_txd.pool[i] = 0;\/\/\u53d1\u9001\u6570\u636eASCII\u7f13\u51b2\u533a\n        sys_txd.combuf[i] = 0;\/\/\u53d1\u9001\u6570\u636eHEX\u7f13\u51b2\u533a\n    }\n    for( i = 0;i < 16;i++ )\n    {\n        sys_rxd.add_buf[i] = 0;\/\/\u7528\u4e8e\u5b58\u653e\u63a5\u6536\u7f13\u51b2\u7684\u5730\u5740\uff0c\u53ef\u4ee5\u5b58\u653e16\u4e2a\u5e27\u5730\u5740\uff0c\u5947\u6570\u4f4d\u662f\u9996\u5730\u5740\uff0c\u5076\u6570\u4f4d\u662f\u5c3e\u5730\u5740\n    }\n\n    sys_rxd.front = 0;\n    sys_rxd.rear = 0;\n    sys_rxd.frm_num = 0;\/\/\u7f13\u51b2\u533a\u4e2d\u7684\u5e27\u6570\u91cf\n    sys_rxd.rd_byte = 0;\/\/\u6682\u5b58\u8bfb\u6570\u636e\n    sys_rxd.start_0x7e = 0;\n    sys_rxd.end_0x0d = 0;\n\n    sys_txd.txd_len = 0;\/\/\u53d1\u9001\u6570\u636e\u957f\u5ea6\n}\n\/*****************************************************************\/\nuint8 \tread_sys_rxd(void)\/\/\u8bfb\u63a5\u6536\u7f13\u51b2\u533a\n{\n \tif( sys_rxd.rear == sys_rxd.front )\n \t{\n        return WRONG;\n    }\n\telse\n    {\n        sys_rxd.rd_byte = sys_rxd.pool[sys_rxd.front];\n\t    sys_rxd.front = (sys_rxd.front+1) % POOLLEN;\n\n\t    return RIGHT;\n    }\n}\n\/*****************************************************************\/\nuint8 data_check(void)\/\/\u6821\u9a8c\u548c\u68c0\u9a8c\n{\n    uint8  add_len,temp;\n\tuint8   i,j,k,fram_temp;\n\tuint16  chk_sum,chk_sum_temp;\n\n\tfram_temp = sys_rxd.frm_num;\/\/\u5982\u4f55\u9632\u6b62\u5728\u5904\u7406\u6570\u636e\u7684\u540c\u65f6\u65b0\u7684\u4e2d\u65ad\u4f7f\u8be5\u503c\u53d8\u5316\n\tadd_len = 0;\n\n\tif( fram_temp )\/\/\u63a5\u6536\u7684\u4e00\u5e27\u5b8c\u6574\u6570\u636e\n    {\n\t\tfram_temp -= 1;\n\n \t\tj = sys_rxd.add_buf[fram_temp * 2];\n        k = sys_rxd.add_buf[fram_temp * 2 + 1];\n\n\t\tif(k > j)\n\t\t{\n\t\t    add_len = k-j;\n\t\t}\n\t\telse\n\t\t{\n\t\t    add_len = (POOLLEN - j ) + k;\/\/\u5730\u5740\u786e\u8ba4\n\t\t}\n\n        sys_rxd.front = j;\n\n\t\tchk_sum = 0;\n\n \t\tfor( i = 0;i < add_len - 4;i++ )          \/\/4 byte is check sum\n\t\t{\n            read_sys_rxd();    \/\/the poionter is add1\n        \tif( sys_rxd.rd_byte == FRAME_START )\n       \t    {\n        \t    sys_rxd.rd_byte = 0;\n        \t}\n\t    \tchk_sum += sys_rxd.rd_byte;\n\t \t}\n\n\t\tchk_sum =  (~chk_sum) + 1;\n\n\t\tchk_sum_temp = 0;\n\t\tfor(i=0;i<4;i++)\n\t\t{\n\t\t\tread_sys_rxd();\n\t\t\ttemp = sys_rxd.rd_byte;\/\/rd_byte \u6682\u5b58\u8bfb\u6570\u636e\n\n\t\t\tif(temp > 0x40)\n\t\t\t{\n\t\t\t    temp -= 0x37; \/\/ get the hex valume\n\t\t\t}\n            else\n            {\n                temp -= 0x30;\n            }\n\n\t\t\tchk_sum_temp  += temp;\n\n\t\t\tif( i < 3 )\n\t\t\t{\n\t   \t\t    chk_sum_temp = chk_sum_temp << 4;\n\t   \t\t}\n\t\t}\n\n        if( chk_sum_temp == chk_sum )\n        {\n            return RIGHT;\n        }\n        else\n        {\n            return WRONG;\n        }\n    }\n    else\n    {\n        return WRONG;\n    }\n}\n\/*****************************************************************\/\nuint8   lenghchk(void)    \/\/\u6570\u636e\u957f\u5ea6\u68c0\u9a8c\n{\n    uint8 link_sum,link_sum_temp;\n    uint8  add_len;\n\tuint8  j,k,fram_temp;\n\n    if( sys_rxd.rec_buf[4] != lchksum(sys_rxd.rec_buf[5]) )\n    {\n        return WRONG;\n    }\n\n    fram_temp = sys_rxd.frm_num; \/\/\u5982\u4f55\u9632\u6b62\u5728\u5904\u7406\u6570\u636e\u7684\u540c\u65f6\u65b0\u7684\u4e2d\u65ad\u4f7f\u8be5\u503c\u53d8\u5316\n\tif ( fram_temp == 0 )\n\t{\n\t    return WRONG;\n\t}\n\n    fram_temp--;\n\n\tj = sys_rxd.add_buf[fram_temp*2];\n\tk = sys_rxd.add_buf[fram_temp*2+1];\n\n\tif(k>j)\n\t{\n\t    add_len = k-j;\n\t}\n\telse\n\t{\n\t    add_len = ( POOLLEN - j ) + k;\n\t}\n\n\tlink_sum_temp = (add_len - 17);\n\tlink_sum = sys_rxd.rec_buf[5];\n\n\tif(link_sum != link_sum_temp)\n\t{\n\t    return WRONG;\n\t}\n\telse\n\t{\n\t    return RIGHT;\n\t}\n\n}\n\/*****************************************************************\/\nvoid data_change(void)\/\/\u6570\u636eASCII\u8f6c\u6362\u6210HEX\n{\n    uint8  add_len;\n\tuint8  i,j,k,temp1,fram_temp;\n\tuint8  temp;\n\n    fram_temp = sys_rxd.frm_num; \/\/\u5982\u4f55\u9632\u6b62\u5728\u5904\u7406\u6570\u636e\u7684\u540c\u65f6\u65b0\u7684\u4e2d\u65ad\u4f7f\u8be5\u503c\u53d8\u5316\n\tif ( fram_temp == 0 )\n\t{\n\t    return;\n\t}\n\n    fram_temp--;\n\n\tj = sys_rxd.add_buf[fram_temp*2];\n\tk = sys_rxd.add_buf[fram_temp*2+1];\n\n\tif(k>j)\n\t{\n\t    add_len = k-j;\n\t}\n\telse\n\t{\n\t    add_len = ( POOLLEN - j ) + k;\n\t}\n\n\tadd_len = add_len \/ 2 + 1;  \/\/cup down 2 byte chksum\n\tsys_rxd.front = j;\n\n\tfor(i = 0;i < add_len;i++ )\n\t{\n        read_sys_rxd(); \/\/the poionter is add1\n    \tif (sys_rxd.rd_byte == 0x0d)\n   \t\t{\n            sys_rxd.rec_buf[i] = 0xaa;\n\t\t\tsys_rxd.rec_buf[i+1]=0x55;\n \t\t\treturn;\n\t\t}\n    \tif (sys_rxd.rd_byte == 0x7e)\n    \t{\n\t\t    read_sys_rxd();\n\t\t}\n        temp = sys_rxd.rd_byte;\n        if(temp>0x40)\n        {\n             temp-=0x37;\n        }\n        else\n        {\n       \t\ttemp -=0x30;\n\t    }\n       \ttemp = temp<<4;\/\/\u9ad84\u4f4d\n     \tread_sys_rxd();\/\/the poionter is add1\n        temp1 = sys_rxd.rd_byte;\n        if(temp1>0x40)\n        {\n       \t\ttemp1-=0x37;\n        }\n        else\n        {\n      \t\ttemp1-=0x30;\n        }\n        sys_rxd.rec_buf[i] = temp+temp1; \/\/ include ver\/adr\/cid1\/cid2\/length\/info\n    }\n}\n\/*****************************************************************\/\nvoid process_rxd(void) \/\/\u63a5\u6536\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e \u5165\u5904\u7406\u7f13\u51b2\u533a\n{\n    while(sys_rxd.frm_num)\n    {\n        if(data_check() == WRONG)\n        {\n            sys_rxd.add_buf[sys_rxd.frm_num*2] = 0;\n            sys_rxd.add_buf[sys_rxd.frm_num*2+1] =0;\n            sys_rxd.frm_num --;\n\n            txd_uni(0x02);  \/\/\u6821\u9a8c\u548c\u9519\u8bef\n            return;\n     \t}\n\n        data_change();\n\n        if( (sys_rxd.rec_buf[1] == ADDR ) )  \/\/\u5730\u5740\u6b63\u786e\n        {\n            if( lenghchk() ==WRONG )  \/\/\u957f\u5ea6\u6821\u9a8c\n            {\n                sys_rxd.add_buf[sys_rxd.frm_num*2] = 0;\n                sys_rxd.add_buf[sys_rxd.frm_num*2+1] =0;\n                sys_rxd.frm_num --;\n\n                txd_uni(0x03);  \/\/\u957f\u5ea6\u6821\u9a8c\u9519\u8bef\n                return;\n            }\n\n            if(sys_rxd.rec_buf[0] != VER)\n            {\n                sys_rxd.add_buf[sys_rxd.frm_num*2] = 0;\n                sys_rxd.add_buf[sys_rxd.frm_num*2+1] =0;\n                sys_rxd.frm_num --;\n                txd_uni(0x01);  \/\/\u7248\u672c\u9519\n                return;\n            }\n            if( (sys_rxd.rec_buf[2] != M_CID))  \/\/\u8bbe\u5907ID\u9519\n            {\n                sys_rxd.add_buf[sys_rxd.frm_num*2] = 0;\n                sys_rxd.add_buf[sys_rxd.frm_num*2+1] =0;\n\n                sys_rxd.frm_num--;\n                txd_uni(0xe1);  \/\/\u8bbe\u5907ID\u9519\n                return;\n            }\n            switch(sys_rxd.rec_buf[3])\n            {\n                case 0x44:\n                    txd_sta();\n               \t    break;\n                case 0x4f:\n                    txd_uni(0x4f);      \/\/\u53d1\u9001\u901a\u8baf\u534f\u8bae\u7248\u672c\u53f7\n                    break;\n                case 0x50:\n                    txd_uni(0x50);      \/\/\u53d1\u9001\u8bbe\u5907\u5730\u5740\n                    break;\n                case 0x51:\n                    txd_man();      \/\/\u53d1\u9001\u8bbe\u5907\u5382\u5bb6\u4fe1\u606f\n                    break;\n                case 0x60:\n                    txd_uni(0x60);      \/\/\u7cfb\u7edf\u521d\u59cb\u5316\n                    break;\n                default:\n                    txd_uni(0x04);  \/\/\u65e0\u6548\u547d\u4ee4\n                    break;\n            }\n        }\n        sys_rxd.frm_num--;\n    }\n}\n\/*****************************************************************\/\nvoid    init_serial(void)\/\/\u521d\u59cb\u5316\u4e32\u53e3\n{\n  \t\/\/\u4e32\u884c\u53e3\u6ce2\u7279\u7387\u7b49\u8bbe\u7f6e\n        TMOD=0x21;      \/\/ T1  mode 2 T0,mode 1 \/\/GATE C\/T M1 M0 GATE C\/T M1 M0\n\tTL1=0xfa;       \/\/ 0xfa=4800 bps  0xfd=9600 bps    0xe8 = 1200    0xf4 = 2400\n\tTH1=0xfa;\n\tTH0=-(10000\/256);\n   \tTL0=-(10000%256);\n        PCON=0;          \/\/\u6ce2\u7279\u7387\u4e0d\u53d8\u7b49\u8bbe\u7f6e\n        SCON=0x50;       \/\/\u4e32\u53e31\u65b9\u5f0f1\uff0c\u5141\u8bb8\u63a5\u6536\n        IT0=1;           \/\/\u5916\u90e8\u4e2d\u65ad0\u4e0b\u964d\u6cbf\u6709\u6548\n        IT1=1;           \/\/\u5916\u90e8\u4e2d\u65ad1\u4e0b\u964d\u6cbf\u6709\u6548\n        TR0=1;           \/\/\u542f\u52a8\u5b9a\u65f6\u56680\n        TR1=1;           \/\/\u542f\u52a8\u5b9a\u65f6\u56681\n        ET0=1;           \/\/\u5f00\u653e\u5b9a\u65f6\u56680\u4e2d\u65ad\n        ES=1;            \/\/\u4e32\u884c\u4e2d\u65ad\n        EX0=0;           \/\/\u5916\u90e8\u4e2d\u65ad0\n        EX1=1;           \/\/\u5916\u90e8\u4e2d\u65ad1\n        EA=1;            \/\/\u5f00\u603b\u4e2d\u65ad\n \/\/       RS485EN = 0;\n\n}\n\/*****************************************************************\/\nvoid    serial_uart(void) interrupt 4\n{\n    uchar idata temp;\n    uchar idata num;\n    if(RI)\n    {\n        RI = 0;\n        temp = SBUF;\n        if( sys_rxd.start_0x7e && (temp != FRAME_END) )\n        {\n            sys_rxd.pool[sys_rxd.rear] = temp;\n            sys_rxd.rear = (sys_rxd.rear + 1) % POOLLEN;\n            return;\n        }\n        else\n        {\n            if( (temp ^ FRAME_START)==0 )    \/\/\u5982\u679c\u63a5\u6536\u5230\u5305\u8d77\u59cb\u4f4d\n            {\n                if( (sys_rxd.start_0x7e) && (sys_rxd.end_0x0d) )\n                {\n                    sys_rxd.rear = sys_rxd.add_buf[num];\n                }\n                else\n                {   \/\/\u7b2c\u4e00\u6b21\u63a5\u6536\u5230\u8d77\u59cb\u4f4d\n                    sys_rxd.start_0x7e = 1;\n                    sys_rxd.end_0x0d = 1;\n                    num = sys_rxd.frm_num * 2;    \/\/\u65b0\u7684\u4e00\u5e27\u7684\u8d77\u59cb\u5730\u5740\u4e0b\u6807\n                    sys_rxd.add_buf[num] = sys_rxd.rear;  \/\/\u8d77\u59cb\u5730\u5740\u4fdd\u5b58\n                }\n                sys_rxd.pool[sys_rxd.rear] = temp;\n                sys_rxd.rear=(sys_rxd.rear+1) % POOLLEN;\n                return;\n            }\n            else\n            {\n                if( sys_rxd.start_0x7e && ( temp == FRAME_END ) )\n\t\t{\n                    sys_rxd.end_0x0d = 0;\n                    sys_rxd.start_0x7e = 0;\n                    sys_rxd.pool[sys_rxd.rear] = temp;\n                    sys_rxd.rear = (sys_rxd.rear+1) % POOLLEN;\n                    num = sys_rxd.frm_num*2+1;\/\/\u7ed3\u675f\u5730\u5740\u4f4d\n\n                    if(sys_rxd.rear==0)   \/\/\u5bf9\u4e8ePOOLLEN\u4e0d\u662f255\u7684\u65f6\u5019\uff0c\u5982\u679c\u76f4\u63a5-1\u505a\u5c3e\u5730\u5740\u3002\u80af\u5b9a\u9020\u6210\u5c3e\u5730\u5740\u9519\u8bef\u3002\u56e0\u4e3a 0-1\uff1d255\n                    {\n                        sys_rxd.add_buf[num] = POOLLEN - 1;\/\/\u5728\u5199\u8fdb\u540e\u7684\u5730\u5740\u5df2\u52a0\u4e0a1\n                    }\n                    else\n                    {\n                        sys_rxd.add_buf[num] = sys_rxd.rear-1;\/\/\u5728\u5199\u8fdb\u540e\u7684\u5730\u5740\u5df2\u52a0\u4e0a1\n                    }\n\n                    sys_rxd.frm_num++;\/\/\u589e\u52a0\u4e00\u5e27\/\/\u6210\u529f\u624d\u52a0\u4e00\u4f4d\n                    sys_rxd.frm_num = sys_rxd.frm_num % 16;\n                    return;\n                }\n            }\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n
\u8fd9\u662f\u4e00\u4e2a\u7528\u4e8e\u5904\u7406Modbus\u901a\u4fe1\u7684\u5d4c\u5165\u5f0fC\u4ee3\u7801\u793a\u4f8b\uff0c\u5305\u542b\u4e86\u4e32\u53e3\u901a\u4fe1\u3001\u6570\u636e\u6821\u9a8c\u3001\u6570\u636e\u957f\u5ea6\u68c0\u9a8c\u548c\u6570\u636e\u8f6c\u6362\u7b49\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u5bf9\u8fd9\u6bb5\u4ee3\u7801\u7684\u7b80\u8981\u8bf4\u660e\uff1a<\/p>\n\n\n\n
    \n
  1. StrRxd<\/code> \u7ed3\u6784\u4f53\u7528\u4e8e\u5b58\u50a8\u63a5\u6536\u5904\u7406\u7684\u76f8\u5173\u53d8\u91cf\u548c\u6570\u636e\u3002<\/li>\n\n\n\n
  2. init_proc_rxd<\/code> \u51fd\u6570\u7528\u4e8e\u521d\u59cb\u5316\u4e32\u53e3\u901a\u4fe1\u53d8\u91cf\u3002\u5b83\u6e05\u96f6\u4e86\u4e00\u4e9b\u7f13\u51b2\u533a\u548c\u6807\u5fd7\u53d8\u91cf\uff0c\u4ee5\u51c6\u5907\u63a5\u6536\u6570\u636e\u3002<\/li>\n\n\n\n
  3. read_sys_rxd<\/code> \u51fd\u6570\u7528\u4e8e\u4ece\u63a5\u6536\u7f13\u51b2\u533a\u4e2d\u8bfb\u53d6\u4e00\u4e2a\u5b57\u8282\u7684\u6570\u636e\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728 sys_rxd.rd_byte<\/code> \u4e2d\u3002<\/li>\n\n\n\n
  4. data_check<\/code> \u51fd\u6570\u7528\u4e8e\u6821\u9a8c\u548c\u68c0\u9a8c\u3002\u5b83\u8ba1\u7b97\u63a5\u6536\u6570\u636e\u7684\u6821\u9a8c\u548c\u5e76\u4e0e\u63a5\u6536\u6570\u636e\u7684\u6821\u9a8c\u5b57\u6bb5\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3002<\/li>\n\n\n\n
  5. lenghchk<\/code> \u51fd\u6570\u7528\u4e8e\u6570\u636e\u957f\u5ea6\u68c0\u9a8c\u3002\u5b83\u6bd4\u8f83\u63a5\u6536\u5230\u7684\u6570\u636e\u957f\u5ea6\u5b57\u6bb5\u4e0e\u5b9e\u9645\u6570\u636e\u957f\u5ea6\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u957f\u5ea6\u6b63\u786e\u3002<\/li>\n\n\n\n
  6. data_change<\/code> \u51fd\u6570\u7528\u4e8e\u5c06ASCII\u683c\u5f0f\u7684\u6570\u636e\u8f6c\u6362\u4e3aHEX\u683c\u5f0f\u7684\u6570\u636e\uff0c\u4ee5\u4fbf\u8fdb\u4e00\u6b65\u5904\u7406\u3002<\/li>\n\n\n\n
  7. process_rxd<\/code> \u51fd\u6570\u7528\u4e8e\u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e\u3002\u5b83\u6839\u636e\u534f\u8bae\u89c4\u8303\u68c0\u67e5\u6570\u636e\u7684\u7248\u672c\u3001\u5730\u5740\u548c\u547d\u4ee4\uff0c\u7136\u540e\u6267\u884c\u76f8\u5e94\u7684\u64cd\u4f5c\u3002<\/li>\n\n\n\n
  8. init_serial<\/code> \u51fd\u6570\u7528\u4e8e\u521d\u59cb\u5316\u4e32\u53e3\u901a\u4fe1\u3002\u5b83\u914d\u7f6e\u4e86\u4e32\u53e3\u7684\u6ce2\u7279\u7387\u3001\u5b9a\u65f6\u5668\u7b49\u53c2\u6570\u3002<\/li>\n\n\n\n
  9. serial_uart<\/code> \u51fd\u6570\u662f\u4e32\u53e3\u63a5\u6536\u4e2d\u65ad\u670d\u52a1\u7a0b\u5e8f\u3002\u5b83\u5728\u4e32\u53e3\u63a5\u6536\u5230\u6570\u636e\u65f6\u89e6\u53d1\uff0c\u5c06\u6570\u636e\u5b58\u50a8\u5728\u63a5\u6536\u7f13\u51b2\u533a\u4e2d\uff0c\u5e76\u89e6\u53d1\u76f8\u5e94\u7684\u5904\u7406\u51fd\u6570\u3002<\/li>\n<\/ol>\n\n\n\n
    \u8fd9\u6bb5\u4ee3\u7801\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684Modbus\u901a\u4fe1\u534f\u8bae\u89e3\u6790\u5668\uff0c\u7528\u4e8e\u63a5\u6536\u548c\u5904\u7406Modbus RTU\u5e27\u3002\u8bf7\u6ce8\u610f\uff0c\u6b64\u793a\u4f8b\u4e2d\u7684\u4ee3\u7801\u662f\u4e3a\u7279\u5b9a\u786c\u4ef6\u548c\u901a\u4fe1\u8981\u6c42\u7f16\u5199\u7684\uff0c\u56e0\u6b64\u9700\u8981\u6839\u636e\u60a8\u7684\u786c\u4ef6\u548c\u5e94\u7528\u7a0b\u5e8f\u8981\u6c42\u8fdb\u884c\u9002\u5f53\u7684\u4fee\u6539\u3002\u6b64\u5916\uff0c\u5b83\u8fd8\u5305\u542b\u4e86\u4e00\u4e9b\u4e2d\u65ad\u5904\u7406\uff0c\u5982\u4e32\u53e3\u63a5\u6536\u4e2d\u65ad\u548c\u5b9a\u65f6\u5668\u4e2d\u65ad\uff0c\u4ee5\u652f\u6301\u5f02\u6b65\u901a\u4fe1\u3002\u8fd9\u4e2a\u4ee3\u7801\u793a\u4f8b\u662f\u4e00\u4e2a\u8d77\u70b9\uff0c\u60a8\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u6269\u5c55\u548c\u4f18\u5316\u3002<\/p>\n\n\n\n
    TXD<\/h2>\n\n\n\n
    #include \"ModBus.h\"\n\/\/--------\u516c\u6709\u51fd\u6570\u548c\u53d8\u91cf-------\nStrTxd xdata sys_txd;\n\/****************************************\/\nuint8 lchksum(uint8  data_len);    \/\/\u6c42LENTH_SUM\u51fd\u6570\nvoid txd_sta(void);     \/\/\u53d1\u9001\u7cfb\u7edf\u544a\u8b66\u4fe1\u606f\nvoid txd_man(void);     \/\/\u53d1\u9001\u5382\u5bb6\u4fe1\u606f\nvoid txd_uni(uint8 cid2);  \/\/\u53d1\u9001\u7cfb\u7edf\u901a\u4fe1\u4fe1\u606f\n\/******************************************\/\nvoid package(void);     \/\/\u6570\u636e\u6253\u5305\u6210ASCII\u7801\nvoid chksum (void);     \/\/\u6c42\u6821\u9a8c\u548c\nvoid com(void);         \/\/\u516c\u5171\u7684\u53d1\u9001\u51fd\u6570\n\/******************************************\/\nuint8 lchksum(uint8  data_len)\/\/\u6c42LENTH_SUM\u51fd\u6570\n{\n    uint8  sum,temp1;\n\tsum = 0;\n\tif (data_len)\n\t{\n\t\tsum = data_len & 0x0f;\n\t\ttemp1 = (data_len & 0xf0)>>4;\n\t\tsum += temp1;\n\t\tsum = sum %16;\n\t\tsum = (~sum)+1;\n\t\tsum = sum <<4;\n\t}\n\n\treturn sum;\n}\n\/******************************************\/\nvoid package(void)\/\/\u6570\u636e\u6253\u5305\u6210ASCII\u7801\n{\n    uint8  i;\n    uint8  temp1,temp2;\n\n    sys_txd.pool[0] = FRAME_START;\n\n    for(i = 1;i < POOLLEN; i++)\n    {\n\t    if( (sys_txd.combuf[i] == 0xaa ) && (sys_txd.combuf[i+1] == 0x55 ) )  \/\/\u7ed3\u675f\u6807\u5fd7\n\t    {\n           \tsys_txd.pool[i*2-1] = FRAME_END;\n           \tbreak;\n       \t}\n        else\n        {\n           \ttemp1 = sys_txd.combuf[i];\n           \ttemp2 = temp1 & 0x0f;\n           \ttemp1 = temp1 & 0xf0;\n           \ttemp1 = temp1>>4;\n          \tsys_txd.pool[i*2-1] = (temp1>0x09)?(temp1+0x37):(temp1+0x30);\n           \tsys_txd.pool[i*2]   = (temp2>0x09)?(temp2+0x37):(temp2+0x30);\n       \t}\n    }\n}\n\/******************************************\/\nvoid chksum (void)\/\/\u6c42\u6821\u9a8c\u548c\n{\n   \tuint8  i;\n   \tuint8  sumh,suml,temp;\n   \tuint16   sum = 0;\n\n  \tfor(i = 1;i < POOLLEN;i++ )\n    {\n  \t    if( sys_txd.pool[i] == FRAME_END )\n  \t  \t{\n         \ttemp = i;\n \t    \tbreak;\n\t  \t}\n\t    else\n\t    {\n          \tsum += sys_txd.pool[i];    \/\/\u6ea2\u51fa\u90e8\u5206\u4e0d\u7528\u8003\u8651\n        }\n    }\n\n   \tsum = (~sum) + 1;\/\/\u53d6\u53cd+1\n   \tsumh = (uint8)(sum\/256);\/\/\u9ad88\u4f4d\n   \tsuml = (uint8)sum;\n   \ti = temp;\n\n   \ttemp = (sumh&0xf0)>>4;\n   \ttemp = (temp>0x09)?(temp+0x37):(temp+0x30);\n   \tsys_txd.pool[i]   =  temp;\n\n   \ttemp = (sumh & 0x0f);\n   \ttemp = (temp>0x09)?(temp+0x37):(temp+0x30);\n   \tsys_txd.pool[i+1] =  temp;\n\n   \ttemp = (suml&0xf0)>>4;\n    temp = (temp>0x09)?(temp+0x37):(temp+0x30);\n   \tsys_txd.pool[i+2] = temp;\n\n    temp = (suml&0x0f);\n   \ttemp = (temp>0x09)?(temp+0x37):(temp+0x30);\n  \tsys_txd.pool[i+3] = temp;\n\n   \tsys_txd.pool[i+4] = FRAME_END;\n\n   \tsys_txd.txd_len = i+4;\n\n   \treturn;\n}\n\/******************************************\/\nvoid com(void)\/\/\u516c\u5171\u7684\u53d1\u9001\u51fd\u6570\n{\n    uint8  i;\n    uint8  j;\n    \n    EA = 0;\n\/\/    RS485EN = 1;    \/\/\u4f7f\u7528485\u901a\u4fe1\u7684\u65f6\u5019\u4f7f\u7528\n    for( i = 0;i <= sys_txd.txd_len;i++ )\n    {\n        SBUF = sys_txd.pool[i];\n        while(TI==0);\n        TI = 0;\n        if( sys_txd.pool[i] == FRAME_END )\n        {\n            for( j=0;j <= sys_txd.txd_len;j++ )\n            {\n      \t        sys_txd.pool[i] = 0;            \/\/\u5bf9\u5df2\u7ecf\u53d1\u9001\u7684\u6570\u636e\u6e050\n            }\n        }\n    }\n\/\/    RS485EN = 0;\n\/\/    RI = 0;   \/\/\u6ce8\u610f\uff0c\u5982\u679c485\u7684\u63a5\u6536\u4f7f\u80fd\u4e00\u76f4\u6709\u6548\uff0c\u5fc5\u987b\u8981\u8fd9\u4e00\u884c\u89e3\u51b3\n    EA = 1;\n}\n\/******************************************\/\nvoid txd_sta(void)\/\/\u53d1\u9001\u7cfb\u7edf\u544a\u8b66\u4fe1\u606f\n{\n\n    sys_txd.combuf[0] = FRAME_START;               \/\/\u8d77\u59cb\u6807\u5fd7\n    sys_txd.combuf[1] = VER;                       \/\/\u7248\u672c\u53f7\n    sys_txd.combuf[2] = ADDR;                      \/\/\u5730\u5740\uff0c\u4e3b\u673a\n    sys_txd.combuf[3] = M_CID;                     \/\/\u8bbe\u5907ID\n\/\/------\u4ee5\u4e0a\u662f\u5305\u5934---------\n    sys_txd.combuf[4] = 0x44;                      \/\/Cid2=0x44\uff0c\u8868\u793a\u53d1\u9001\u6240\u6709\u7684\u544a\u8b66\u72b6\u6001\n\/\/------length---------\n    sys_txd.combuf[5] = lchksum(20); \/\/length checksum\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n    sys_txd.combuf[6] = 20;          \/\/length id\n    \/********************************************\/\n    sys_txd.combuf[7] = 20;          \/\/\u8fd9\u91cc\u653e\u544a\u8b66\u4fe1\u606f\n    sys_txd.combuf[8] = 20;          \/\/\n    sys_txd.combuf[9] = 20;          \/\/\n    sys_txd.combuf[10] = 20;         \/\/\n    \/********************************************\/\n    sys_txd.combuf[11] = 0xaa;        \/\/end ;\n    sys_txd.combuf[12] = 0x55;    \/\/\u6570\u636e\u6253\u5305\u6210ASCII\u7801\n    \n    package();              \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\n    chksum();                  \/\/\u9664\u8d77\u59cb\u548c\u6821\u9a8c\u548c\u4ee5\u53ca\u7ed3\u675f\u4e4b\u5916\u7684ASCII\u7801\u6c42\u6821\u9a8c\u548c\n    com();\n}\n\/******************************************************\/\nvoid txd_man(void)\/\/\u53d1\u9001\u5382\u5bb6\u4fe1\u606f\n{\n\/\/-----------------------------------------------------------------\n    sys_txd.combuf[0] = FRAME_START;               \/\/\u8d77\u59cb\u6807\u5fd7\n    sys_txd.combuf[1] = VER;                       \/\/\u7248\u672c\u53f7\n    sys_txd.combuf[2] = ADDR;                      \/\/\u5730\u5740\uff0c\u4e3b\u673a\n    sys_txd.combuf[3] = M_CID;                     \/\/\u8bbe\u5907ID\n\t\/\/----------\u4ee5\u4e0a\u662f\u5305\u5934\n\/\/-----------------------------------------------------------------\n\tsys_txd.combuf[4] =0x51;\n\n\tsys_txd.combuf[5] =lchksum(0x40);\n\tsys_txd.combuf[6] =0x40;\n\n\tsys_txd.combuf[7]  = 'L';        \/\/L\n\tsys_txd.combuf[8]  = 'I';        \/\/I\n\tsys_txd.combuf[9]  = 'N';        \/\/N\n\tsys_txd.combuf[10] = 'E';        \/\/E\n\tsys_txd.combuf[11] = 0;\n\tsys_txd.combuf[12] = 0x00;\n\tsys_txd.combuf[13] = 0x00;\n\tsys_txd.combuf[14] = 0x00;\n\tsys_txd.combuf[15] = 0x00;\n\tsys_txd.combuf[16] = 0x00;\n\n\tsys_txd.combuf[17] = 0x01;       \/\/1   \u7248\u672c\n\tsys_txd.combuf[18] = 0x00;       \/\/0\n\n\tsys_txd.combuf[19] = 0x41;       \/\/A   \u5382\u5bb6\n\tsys_txd.combuf[20] = 0x41;       \/\/A\n\tsys_txd.combuf[21] = 0x41;       \/\/A\n\tsys_txd.combuf[22] = 0x41;       \/\/A\n\tsys_txd.combuf[23] = 0x41;       \/\/A\n\tsys_txd.combuf[24] = 0x41;       \/\/A\n\tsys_txd.combuf[25] = 0x41;       \/\/A\n\tsys_txd.combuf[26] = 0x41;       \/\/A\n\tsys_txd.combuf[27] = 0x41;       \/\/A\n\tsys_txd.combuf[28] = 0x41;       \/\/A\n\tsys_txd.combuf[29] = 0x00;\n\tsys_txd.combuf[30] = 0x00;\n\tsys_txd.combuf[31] = 0x00;\n\tsys_txd.combuf[32] = 0x00;\n\tsys_txd.combuf[33] = 0x00;\n\tsys_txd.combuf[34] = 0x00;\n\tsys_txd.combuf[35] = 0x00;\n\tsys_txd.combuf[36] = 0x00;\n\tsys_txd.combuf[37] = 0x00;\n\tsys_txd.combuf[38] = 0x00;\n\n\tsys_txd.combuf[39] = 0xaa;\n\tsys_txd.combuf[40] = 0x55;\n\n    package();                 \/\/\u6570\u636e\u6253\u5305\u6210ASCII\u7801\n\tchksum();                  \/\/\u9664\u8d77\u59cb\u548c\u6821\u9a8c\u548c\u4ee5\u53ca\u7ed3\u675f\u4e4b\u5916\u7684ASCII\u7801\u6c42\u6821\u9a8c\u548c\n    com();\n}\n\/******************************************\/\nvoid txd_uni(uint8 cid2)\/\/\u53d1\u9001\u7cfb\u7edf\u901a\u4fe1\u4fe1\u606f\n{\n\/\/-----------------------------------------------------------------\n    sys_txd.combuf[0] = FRAME_START;               \/\/\u8d77\u59cb\u6807\u5fd7\n    sys_txd.combuf[1] = VER;                       \/\/\u7248\u672c\u53f7\n    sys_txd.combuf[2] = ADDR;                      \/\/\u5730\u5740\uff0c\u4e3b\u673a\n    sys_txd.combuf[3] = M_CID;                     \/\/\u8bbe\u5907ID\n\t\/\/----------\u4ee5\u4e0a\u662f\u5305\u5934\n\/\/-----------------------------------------------------------------\n\tsys_txd.combuf[4] = cid2;\n\tsys_txd.combuf[5] = lchksum(0x00);       \/\/length checksum 0x00\n\tsys_txd.combuf[6] = 0x00;                \/\/length id 00\n\n\tsys_txd.combuf[7] = 0xaa;                \/\/length id=00,\u6240\u4ee5\uff0c\u6ca1\u6709info\n\tsys_txd.combuf[8] = 0x55;\n    package();                 \/\/\u6570\u636e\u6253\u5305\u6210ASCII\u7801\n\tchksum();                  \/\/\u9664\u8d77\u59cb\u548c\u6821\u9a8c\u548c\u4ee5\u53ca\u7ed3\u675f\u4e4b\u5916\u7684ASCII\u7801\u6c42\u6821\u9a8c\u548c\n    com();\n}\n\/******************************************\/\n<\/code><\/pre>\n\n\n\n
    \u8fd9\u6bb5\u4ee3\u7801\u662f\u7528\u4e8e\u5904\u7406Modbus\u901a\u4fe1\u4e2d\u7684\u6570\u636e\u6253\u5305\u548c\u53d1\u9001\u7684\u76f8\u5173\u51fd\u6570\u3002\u4ee5\u4e0b\u662f\u5bf9\u6bcf\u4e2a\u51fd\u6570\u7684\u7b80\u8981\u8bf4\u660e\uff1a<\/p>\n\n\n\n
      \n
    1. lchksum<\/code> \u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u957f\u5ea6\u6821\u9a8c\u548c\uff08length checksum<\/code>\uff09\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u957f\u5ea6\u5b57\u6bb5\u6b63\u786e\u3002\u5b83\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570 data_len<\/code>\uff0c\u8ba1\u7b97\u5e76\u8fd4\u56de\u957f\u5ea6\u6821\u9a8c\u548c\u3002<\/li>\n\n\n\n
    2. package<\/code> \u51fd\u6570\u7528\u4e8e\u5c06\u6570\u636e\u6253\u5305\u6210ASCII\u7801\u5f62\u5f0f\u3002\u5b83\u5c06HEX\u683c\u5f0f\u7684\u6570\u636e\u8f6c\u6362\u4e3aASCII\u7801\uff0c\u5e76\u5728\u6bcf\u4e2aHEX\u5b57\u8282\u4e4b\u95f4\u63d2\u5165\u5408\u9002\u7684\u5206\u9694\u7b26\u3002\u6700\u7ec8\u7684\u6570\u636e\u5b58\u50a8\u5728 sys_txd.combuf<\/code> \u4e2d\u3002<\/li>\n\n\n\n
    3. chksum<\/code> \u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u6821\u9a8c\u548c\u3002\u5b83\u8ba1\u7b97\u9664\u4e86\u8d77\u59cb\u6807\u5fd7\u3001\u6821\u9a8c\u548c\u5b57\u6bb5\u548c\u7ed3\u675f\u6807\u5fd7\u4e4b\u5916\u7684\u6240\u6709\u6570\u636e\u7684\u6821\u9a8c\u548c\uff0c\u5c06\u5176\u6dfb\u52a0\u5230\u6570\u636e\u4e2d\u3002<\/li>\n\n\n\n
    4. com<\/code> \u51fd\u6570\u7528\u4e8e\u53d1\u9001\u6570\u636e\u3002\u5b83\u901a\u8fc7\u4e32\u53e3\u5c06\u6570\u636e\u53d1\u9001\u51fa\u53bb\uff0c\u5e76\u6e05\u9664\u5df2\u53d1\u9001\u7684\u6570\u636e\uff0c\u4ee5\u4fbf\u4e0b\u4e00\u6b21\u4f7f\u7528\u3002<\/li>\n\n\n\n
    5. txd_sta<\/code> \u51fd\u6570\u7528\u4e8e\u53d1\u9001\u7cfb\u7edf\u544a\u8b66\u4fe1\u606f\u3002\u5b83\u8bbe\u7f6e\u4e86\u4e00\u4e2a\u7279\u5b9a\u7684\u547d\u4ee4 cid2<\/code>\uff080x44\uff09\uff0c\u8868\u793a\u53d1\u9001\u544a\u8b66\u4fe1\u606f\u3002\u7136\u540e\uff0c\u5b83\u8bbe\u7f6e\u6570\u636e\u957f\u5ea6\u3001\u544a\u8b66\u4fe1\u606f\u548c\u5176\u4ed6\u76f8\u5173\u5b57\u6bb5\uff0c\u6700\u540e\u8c03\u7528 package<\/code>\u3001chksum<\/code> \u548c com<\/code> \u51fd\u6570\u53d1\u9001\u6570\u636e\u3002<\/li>\n\n\n\n
    6. txd_man<\/code> \u51fd\u6570\u7528\u4e8e\u53d1\u9001\u5382\u5bb6\u4fe1\u606f\u3002\u5b83\u8bbe\u7f6e\u4e86\u4e00\u4e2a\u7279\u5b9a\u7684\u547d\u4ee4 cid2<\/code>\uff080x51\uff09\uff0c\u8868\u793a\u53d1\u9001\u5382\u5bb6\u4fe1\u606f\u3002\u7136\u540e\uff0c\u5b83\u8bbe\u7f6e\u6570\u636e\u957f\u5ea6\u3001\u5382\u5bb6\u4fe1\u606f\u548c\u5176\u4ed6\u76f8\u5173\u5b57\u6bb5\uff0c\u6700\u540e\u8c03\u7528 package<\/code>\u3001chksum<\/code> \u548c com<\/code> \u51fd\u6570\u53d1\u9001\u6570\u636e\u3002<\/li>\n\n\n\n
    7. txd_uni<\/code> \u51fd\u6570\u7528\u4e8e\u53d1\u9001\u7cfb\u7edf\u901a\u4fe1\u4fe1\u606f\u3002\u5b83\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570 cid2<\/code>\uff0c\u8868\u793a\u901a\u4fe1\u547d\u4ee4\u3002\u6839\u636e\u4e0d\u540c\u7684 cid2<\/code>\uff0c\u5b83\u8bbe\u7f6e\u4e86\u76f8\u5e94\u7684\u547d\u4ee4\u5e76\u53d1\u9001\u76f8\u5e94\u7684\u6570\u636e\u3002<\/li>\n<\/ol>\n\n\n\n
      \u8fd9\u4e9b\u51fd\u6570\u4e00\u8d77\u6784\u5efa\u4e86\u6570\u636e\u53d1\u9001\u7684\u6d41\u7a0b\uff0c\u7528\u4e8e\u53d1\u9001\u4e0d\u540c\u7c7b\u578b\u7684Modbus\u5e27\u3002\u8bf7\u6ce8\u610f\uff0c\u6b64\u793a\u4f8b\u4e2d\u7684\u4ee3\u7801\u662f\u4e3a\u7279\u5b9a\u5e94\u7528\u7a0b\u5e8f\u7f16\u5199\u7684\uff0c\u56e0\u6b64\u9700\u8981\u6839\u636e\u60a8\u7684\u8981\u6c42\u8fdb\u884c\u9002\u5f53\u7684\u4fee\u6539\u3002\u6b64\u5916\uff0c\u8be5\u4ee3\u7801\u793a\u4f8b\u8fd8\u5305\u62ec\u4e00\u4e9b\u4e32\u53e3\u901a\u4fe1\u548c\u6570\u636e\u8f6c\u6362\u7684\u529f\u80fd\uff0c\u4ee5\u652f\u6301Modbus\u901a\u4fe1\u3002<\/p>\n\n\n\n
      ModBusStr<\/h2>\n\n\n\n
      #ifndef MODBUSSTR_H\n#define MODBUSSTR_H\n\/\/==============================================\n#define uchar unsigned char\n#define uint unsigned int\n#define uint8 unsigned char\n#define uint16 unsigned int\n\/\/\u63a5\u6536\u7f13\u51b2\u533a\u7ed3\u6784\u53d8\u91cf\ntypedef struct str_rxd_pool\n{\n    uint8 pool[255];\t\/\/\u63a5\u6536\u6570\u636e\u7f13\u51b2\u533a\n    uint8 front; \t    \/\/\u5934\u6307\u9488\n    uint8 rear;\t    \t\/\/\u5c3e\u6307\u9488\n    uint8 rd_byte;\t    \/\/\u6682\u5b58\u8bfb\u6570\u636e\n    uint8 frm_num;\t    \/\/\u7f13\u51b2\u533a\u4e2d\u7684\u5e27\u6570\u91cf\n    uint8 add_buf[16];\t\/\/\u7528\u4e8e\u5b58\u653e\u63a5\u6536\u7f13\u51b2\u7684\u5730\u5740\uff0c\u53ef\u4ee5\u5b58\u653e16\u4e2a\u5e27\u5730\u5740\uff0c\u5947\u6570\u4f4d\u662f\u9996\u5730\u5740\uff0c\u5076\u6570\u4f4d\u662f\u5c3e\u5730\u5740\n    uint8 rec_buf[255]; \/\/\u53bb\u9664\u5305\u5934\u5305\u5c3e\u540e\u7684\u6570\u636e\u4fdd\u7559\u533a\uff0c\u8fd9\u91cc\u53ea\u4fdd\u7559\u4e00\u5e27\u6709\u6548\u6570\u636e\n\n    uint8 start_0x7e;   \/\/\u63a5\u6536\u5230\u5e27\u5934\u6807\u5fd7\n    uint8 end_0x0d;     \/\/\u63a5\u6536\u5230\u5e27\u5c3e\u6807\u5fd7\n\n}StrRxd;\n\/\/===============================================\n\/\/\u53d1\u9001\u7f13\u51b2\u533a\u7ed3\u6784\u53d8\u91cf\ntypedef struct str_txd_pool\n{\n    uint8 pool[255];\t    \/\/\u53d1\u9001\u6570\u636eASCII\u7f13\u51b2\u533a\n    uint8 combuf[255];      \/\/\u53d1\u9001\u6570\u636eHEX\u7f13\u51b2\u533a\n    uint8 txd_len;          \/\/\u53d1\u9001\u6570\u636e\u957f\u5ea6\n}StrTxd;\n#endif<\/code><\/pre>\n\n\n\n
      \u8fd9\u662f\u4e00\u4e2aC\u8bed\u8a00\u5934\u6587\u4ef6\uff08MODBUSSTR.H<\/code>\uff09\uff0c\u5b9a\u4e49\u4e86\u7528\u4e8eModbus\u901a\u4fe1\u7684\u6570\u636e\u7ed3\u6784\u548c\u76f8\u5173\u7c7b\u578b\u522b\u540d\u3002\u4ee5\u4e0b\u662f\u8fd9\u4e2a\u5934\u6587\u4ef6\u4e2d\u5b9a\u4e49\u7684\u4e3b\u8981\u5185\u5bb9\uff1a<\/p>\n\n\n\n
        \n
      1. \u5934\u6587\u4ef6\u4fdd\u62a4\u5b8f\u5b9a\u4e49 #ifndef MODBUSSTR_H<\/code> \u548c #define MODBUSSTR_H<\/code>\uff0c\u4ee5\u786e\u4fdd\u6587\u4ef6\u53ea\u88ab\u5305\u542b\u4e00\u6b21\u3002<\/li>\n\n\n\n
      2. \u4e00\u4e9b\u7c7b\u578b\u522b\u540d\u7684\u5b9a\u4e49\uff0c\u5176\u4e2d uchar<\/code>\u3001uint<\/code>\u3001uint8<\/code> \u548c uint16<\/code> \u5206\u522b\u4ee3\u8868\u65e0\u7b26\u53f7\u5b57\u7b26\u3001\u65e0\u7b26\u53f7\u6574\u6570\u548c\u4e0d\u540c\u5bbd\u5ea6\u7684\u65e0\u7b26\u53f7\u6574\u6570\u3002<\/li>\n\n\n\n
      3. StrRxd<\/code> \u7ed3\u6784\u4f53\u5b9a\u4e49\uff0c\u7528\u4e8e\u63a5\u6536\u7f13\u51b2\u533a\u7684\u76f8\u5173\u6570\u636e\u7ed3\u6784\u3002\u8fd9\u4e2a\u7ed3\u6784\u4f53\u5305\u62ec\u4ee5\u4e0b\u6210\u5458\uff1a<\/li>\n<\/ol>\n\n\n\n
          \n
        • pool[255]<\/code>\uff1a\u7528\u4e8e\u5b58\u50a8\u63a5\u6536\u7684\u6570\u636e\u7684\u7f13\u51b2\u533a\uff0c\u6700\u5927\u957f\u5ea6\u4e3a255\u5b57\u8282\u3002<\/li>\n\n\n\n
        • front<\/code>\uff1a\u5934\u6307\u9488\uff0c\u6307\u5411\u7f13\u51b2\u533a\u7684\u5f00\u5934\u3002<\/li>\n\n\n\n
        • rear<\/code>\uff1a\u5c3e\u6307\u9488\uff0c\u6307\u5411\u7f13\u51b2\u533a\u7684\u672b\u5c3e\u3002<\/li>\n\n\n\n
        • rd_byte<\/code>\uff1a\u7528\u4e8e\u6682\u5b58\u8bfb\u53d6\u7684\u6570\u636e\u3002<\/li>\n\n\n\n
        • frm_num<\/code>\uff1a\u7f13\u51b2\u533a\u4e2d\u7684\u5e27\u6570\u91cf\u3002<\/li>\n\n\n\n
        • add_buf[16]<\/code>\uff1a\u7528\u4e8e\u5b58\u653e\u63a5\u6536\u7f13\u51b2\u533a\u7684\u5730\u5740\uff0c\u53ef\u4ee5\u5b58\u653e16\u4e2a\u5e27\u5730\u5740\uff0c\u5947\u6570\u4f4d\u662f\u9996\u5730\u5740\uff0c\u5076\u6570\u4f4d\u662f\u5c3e\u5730\u5740\u3002<\/li>\n\n\n\n
        • rec_buf[255]<\/code>\uff1a\u7528\u4e8e\u5b58\u50a8\u53bb\u9664\u5305\u5934\u548c\u5305\u5c3e\u540e\u7684\u6570\u636e\uff0c\u53ea\u4fdd\u7559\u4e00\u5e27\u6709\u6548\u6570\u636e\u3002<\/li>\n\n\n\n
        • start_0x7e<\/code>\uff1a\u7528\u4e8e\u6807\u5fd7\u662f\u5426\u63a5\u6536\u5230\u5e27\u5934\u6807\u5fd7\u3002<\/li>\n\n\n\n
        • end_0x0d<\/code>\uff1a\u7528\u4e8e\u6807\u5fd7\u662f\u5426\u63a5\u6536\u5230\u5e27\u5c3e\u6807\u5fd7\u3002<\/li>\n<\/ul>\n\n\n\n
            \n
          1. StrTxd<\/code> \u7ed3\u6784\u4f53\u5b9a\u4e49\uff0c\u7528\u4e8e\u53d1\u9001\u7f13\u51b2\u533a\u7684\u76f8\u5173\u6570\u636e\u7ed3\u6784\u3002\u8fd9\u4e2a\u7ed3\u6784\u4f53\u5305\u62ec\u4ee5\u4e0b\u6210\u5458\uff1a<\/li>\n<\/ol>\n\n\n\n
              \n
            • pool[255]<\/code>\uff1a\u7528\u4e8e\u5b58\u50a8\u53d1\u9001\u7684\u6570\u636e\u7684ASCII\u7801\u5f62\u5f0f\u7684\u7f13\u51b2\u533a\uff0c\u6700\u5927\u957f\u5ea6\u4e3a255\u5b57\u8282\u3002<\/li>\n\n\n\n
            • combuf[255]<\/code>\uff1a\u7528\u4e8e\u5b58\u50a8\u53d1\u9001\u7684\u6570\u636e\u7684HEX\u5f62\u5f0f\u7684\u7f13\u51b2\u533a\uff0c\u6700\u5927\u957f\u5ea6\u4e3a255\u5b57\u8282\u3002<\/li>\n\n\n\n
            • txd_len<\/code>\uff1a\u53d1\u9001\u6570\u636e\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n
              \u8fd9\u4e2a\u5934\u6587\u4ef6\u5b9a\u4e49\u4e86\u7528\u4e8eModbus\u901a\u4fe1\u7684\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5305\u542b\u6b64\u5934\u6587\u4ef6\u4ee5\u8bbf\u95ee\u8fd9\u4e9b\u6570\u636e\u7ed3\u6784\u548c\u7c7b\u578b\u522b\u540d\u3002\u8fd9\u6709\u52a9\u4e8e\u66f4\u597d\u5730\u7ec4\u7ec7\u548c\u7ba1\u7406Modbus\u901a\u4fe1\u4e2d\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
              ModBus<\/h2>\n\n\n\n
              #include \"reg51.h\"\n#include \"ModBusStr.h\"\n\n#define uchar unsigned char\n#define uint unsigned int\n#define uint8 unsigned char\n#define uint16 unsigned int\n\n#define OK 1\n#define ERROR 0\n\n#define RIGHT 1\n#define WRONG 0\n\n\n#define    POOLLEN  255              \/\/\u7f13\u51b2\u533a\u5927\u5c0f\n\n#define    INIT_COMMAND   0x20\n#define    START_COMMAND  0x21\n#define    END_COMMAND    0x22\n#define    ALARM_COMMAND  0x23\n\n\n#define    FRAME_START    0x7e         \/\/\u5e27\u5f00\u59cb\u6807\u5fd7\n#define    FRAME_END      0x0d         \/\/\u5e27\u7ed3\u675f\u6807\u5fd7\n#define    VER    0x10\n#define    ADDR   0x01\n\n\n#define    M_CID   0x25                \/\/\u8bbe\u5907\u8bc6\u522b\u7801\uff0c0x25\u4ee3\u8868\u76f4\u6d41\u7535\u6e90\u67dc\n\nextern    StrRxd xdata sys_rxd;\nextern    StrTxd xdata sys_txd;\n\nextern    void    init_proc_rxd(void);\nextern    void    process_rxd(void);\nextern    void    init_serial(void);\n\nextern    uint8 lchksum(uint8  data_len);\nextern    void txd_sta(void);\nextern    void txd_man(void);\nextern    void txd_uni(uint8 cid2);\n<\/code><\/pre>\n\n\n\n
              \u8fd9\u6bb5\u4ee3\u7801\u662f\u4e00\u4e2a\u5305\u542b\u4e86\u4e00\u4e9b\u5b8f\u5b9a\u4e49\u3001\u6570\u636e\u7ed3\u6784\u7684\u5934\u6587\u4ef6 \"ModBusStr.h\"<\/code> \u548c\u5176\u4ed6\u7684\u76f8\u5173\u5934\u6587\u4ef6 \"reg51.h\"<\/code>\uff0c\u4ee5\u53ca\u5b9a\u4e49\u4e86\u4e00\u4e9b\u5168\u5c40\u53d8\u91cf\u548c\u51fd\u6570\u539f\u578b\u3002<\/p>\n\n\n\n
              \u4ee5\u4e0b\u662f\u4ee3\u7801\u4e2d\u7684\u4e00\u4e9b\u91cd\u8981\u5143\u7d20\uff1a<\/p>\n\n\n\n
                \n
              1. \u5934\u6587\u4ef6\u5305\u542b\uff1a<\/li>\n<\/ol>\n\n\n\n
                  \n
                • \"reg51.h\"<\/code>\uff1a\u8fd9\u662f\u7528\u4e8e 8051 \u7cfb\u5217\u5355\u7247\u673a\u7684\u6807\u51c6\u5934\u6587\u4ef6\uff0c\u63d0\u4f9b\u4e86\u4e0e\u8be5\u7cfb\u5217\u82af\u7247\u76f8\u5173\u7684\u5bc4\u5b58\u5668\u548c\u5b8f\u5b9a\u4e49\u3002<\/li>\n\n\n\n
                • \"ModBusStr.h\"<\/code>\uff1a\u8fd9\u662f\u4f60\u81ea\u5df1\u521b\u5efa\u7684\u5934\u6587\u4ef6\uff0c\u5305\u542b\u4e86 Modbus \u901a\u4fe1\u76f8\u5173\u7684\u6570\u636e\u7ed3\u6784\u548c\u7c7b\u578b\u522b\u540d\u3002<\/li>\n<\/ul>\n\n\n\n
                    \n
                  1. \u5b8f\u5b9a\u4e49\uff1a<\/li>\n<\/ol>\n\n\n\n
                      \n
                    • OK<\/code> \u548c ERROR<\/code>\uff1a\u5b9a\u4e49\u4e86\u4e24\u4e2a\u5e38\u91cf\uff0c\u5206\u522b\u4e3a 1 \u548c 0\uff0c\u901a\u5e38\u7528\u4e8e\u8868\u793a\u51fd\u6570\u6267\u884c\u6210\u529f\u548c\u5931\u8d25\u3002<\/li>\n\n\n\n
                    • RIGHT<\/code> \u548c WRONG<\/code>\uff1a\u5b9a\u4e49\u4e86\u4e24\u4e2a\u5e38\u91cf\uff0c\u901a\u5e38\u7528\u4e8e\u8868\u793a\u67d0\u4e9b\u6761\u4ef6\u6216\u64cd\u4f5c\u7684\u6210\u529f\u548c\u5931\u8d25\u3002<\/li>\n\n\n\n
                    • POOLLEN<\/code>\uff1a\u5b9a\u4e49\u4e86\u7f13\u51b2\u533a\u7684\u6700\u5927\u957f\u5ea6\u4e3a 255\u3002<\/li>\n\n\n\n
                    • INIT_COMMAND<\/code>\u3001START_COMMAND<\/code>\u3001END_COMMAND<\/code> \u548c ALARM_COMMAND<\/code>\uff1a\u5b9a\u4e49\u4e86\u4e00\u4e9b\u547d\u4ee4\u5e38\u91cf\uff0c\u8868\u793a\u4e0d\u540c\u7684\u64cd\u4f5c\u3002<\/li>\n\n\n\n
                    • FRAME_START<\/code> \u548c FRAME_END<\/code>\uff1a\u5b9a\u4e49\u4e86\u5e27\u7684\u8d77\u59cb\u548c\u7ed3\u675f\u6807\u5fd7\u3002<\/li>\n\n\n\n
                    • VER<\/code> \u548c ADDR<\/code>\uff1a\u5b9a\u4e49\u4e86\u7248\u672c\u53f7\u548c\u5730\u5740\u3002<\/li>\n\n\n\n
                    • M_CID<\/code>\uff1a\u5b9a\u4e49\u4e86\u8bbe\u5907\u7684\u8bc6\u522b\u7801\u3002<\/li>\n<\/ul>\n\n\n\n
                        \n
                      1. \u5916\u90e8\u5168\u5c40\u53d8\u91cf\u58f0\u660e\uff1a<\/li>\n<\/ol>\n\n\n\n
                          \n
                        • StrRxd xdata sys_rxd<\/code> \u548c StrTxd xdata sys_txd<\/code>\uff1a\u58f0\u660e\u4e86\u4e24\u4e2a\u5916\u90e8\u5168\u5c40\u53d8\u91cf\uff0csys_rxd<\/code> \u548c sys_txd<\/code>\uff0c\u8fd9\u4e9b\u53d8\u91cf\u662f\u5728\u5176\u4ed6\u6e90\u6587\u4ef6\u4e2d\u5b9a\u4e49\u7684\uff0c\u7528\u4e8e\u5b58\u50a8 Modbus \u901a\u4fe1\u76f8\u5173\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n
                            \n
                          1. \u5916\u90e8\u51fd\u6570\u539f\u578b\u58f0\u660e\uff1a<\/li>\n<\/ol>\n\n\n\n
                              \n
                            • void init_proc_rxd(void)<\/code>\u3001void process_rxd(void)<\/code> \u548c void init_serial(void)<\/code>\uff1a\u8fd9\u4e9b\u51fd\u6570\u539f\u578b\u58f0\u660e\u7528\u4e8e\u521d\u59cb\u5316\u63a5\u6536\u5904\u7406\u3001\u901a\u4fe1\u5904\u7406\u548c\u4e32\u53e3\u521d\u59cb\u5316\u3002<\/li>\n\n\n\n
                            • uint8 lchksum(uint8 data_len)<\/code>\u3001void txd_sta(void)<\/code>\u3001void txd_man(void)<\/code> \u548c void txd_uni(uint8 cid2)<\/code>\uff1a\u8fd9\u4e9b\u51fd\u6570\u539f\u578b\u58f0\u660e\u7528\u4e8e\u8ba1\u7b97\u957f\u5ea6\u6821\u9a8c\u548c\u3001\u53d1\u9001\u7cfb\u7edf\u544a\u8b66\u4fe1\u606f\u3001\u53d1\u9001\u5382\u5bb6\u4fe1\u606f\u548c\u53d1\u9001\u7cfb\u7edf\u901a\u4fe1\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n
                              \u8fd9\u6bb5\u4ee3\u7801\u7ec4\u7ec7\u4e86 Modbus \u901a\u4fe1\u76f8\u5173\u7684\u6570\u636e\u548c\u51fd\u6570\uff0c\u5e76\u901a\u8fc7\u5934\u6587\u4ef6\u5c06\u8fd9\u4e9b\u5b9a\u4e49\u548c\u58f0\u660e\u63d0\u4f9b\u7ed9\u5176\u4ed6\u6e90\u6587\u4ef6\u4f7f\u7528\u3002\u6e90\u6587\u4ef6\u53ef\u4ee5\u5305\u542b\u8fd9\u4e2a\u5934\u6587\u4ef6\u6765\u8bbf\u95ee\u8fd9\u4e9b\u5b9a\u4e49\u548c\u58f0\u660e\uff0c\u4ece\u800c\u5b9e\u73b0 Modbus \u901a\u4fe1\u529f\u80fd\u3002<\/p>\n\n\n\n
                              MainTest<\/h2>\n\n\n\n
                              #include \"ModBus.h\"\nvoid    main(void)\n{\n    init_serial();\/\/\u521d\u59cb\u5316\u4e32\u53e3\n    init_proc_rxd();\/\/\u521d\u59cb\u5316\u4e32\u53e3\u901a\u4fe1\u53d8\u91cf\n    while(1)\n    {\n        process_rxd();\/\/\u901a\u4fe1\u5904\u7406\u51fd\u6570 \u63a5\u6536\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e \u5165\u5904\u7406\u7f13\u51b2\u533a\n    }\n}\n<\/code><\/pre>\n\n\n\n
                              \u8fd9\u662f\u4e00\u4e2a8051\u5355\u7247\u673a\u4e0a\u7684\u4e3b\u7a0b\u5e8f\u793a\u4f8b\uff0c\u7528\u4e8e\u6267\u884cModbus\u901a\u4fe1\u5904\u7406\u3002\u5728\u4e3b\u51fd\u6570\u4e2d\uff0c\u5b83\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n\n\n\n
                                \n
                              1. \u5305\u542b ModBus.h<\/code> \u5934\u6587\u4ef6\uff0c\u8be5\u6587\u4ef6\u5e94\u8be5\u5305\u542b\u6240\u6709\u5fc5\u9700\u7684\u5b9a\u4e49\u3001\u5168\u5c40\u53d8\u91cf\u548c\u51fd\u6570\u539f\u578b\u4ee5\u652f\u6301Modbus\u901a\u4fe1\u3002<\/li>\n\n\n\n
                              2. \u8c03\u7528 init_serial()<\/code> \u51fd\u6570\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u4e32\u53e3\u901a\u4fe1\uff0c\u8fd9\u662f\u8bbe\u7f6e\u548c\u51c6\u5907\u4e0e\u5176\u4ed6\u8bbe\u5907\u901a\u4fe1\u7684\u91cd\u8981\u4e00\u6b65\u3002<\/li>\n\n\n\n
                              3. \u8c03\u7528 init_proc_rxd()<\/code> \u51fd\u6570\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u4e32\u53e3\u901a\u4fe1\u53d8\u91cf\u3002\u8fd9\u4e00\u6b65\u901a\u5e38\u662f\u4e3a\u4e86\u786e\u4fdd\u901a\u4fe1\u53d8\u91cf\u5904\u4e8e\u6b63\u786e\u7684\u521d\u59cb\u72b6\u6001\u3002<\/li>\n\n\n\n
                              4. \u8fdb\u5165\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\uff08while(1)<\/code>\uff09\uff0c\u5728\u5faa\u73af\u4e2d\u4e0d\u65ad\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/li>\n<\/ol>\n\n\n\n
                                  \n
                                • \u8c03\u7528 process_rxd()<\/code> \u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u901a\u4fe1\u5904\u7406\uff0c\u63a5\u6536\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e\u5e76\u8fdb\u884c\u5904\u7406\u3002\u901a\u5e38\uff0c\u8fd9\u662f\u4e00\u4e2a\u6301\u7eed\u76d1\u542c\u548c\u5904\u7406\u6765\u81ea\u5176\u4ed6\u8bbe\u5907\u7684Modbus\u901a\u4fe1\u8bf7\u6c42\u7684\u8fc7\u7a0b\u3002<\/li>\n<\/ul>\n\n\n\n
                                  \u6574\u4e2a\u7a0b\u5e8f\u5c06\u4e0d\u65ad\u8fd0\u884c\uff0c\u7b49\u5f85\u6765\u81ea\u5176\u4ed6\u8bbe\u5907\u7684\u901a\u4fe1\u8bf7\u6c42\uff0c\u7136\u540e\u6267\u884c\u76f8\u5e94\u7684\u64cd\u4f5c\u3002\u8fd9\u4e2a\u793a\u4f8b\u4e2d\u4e3b\u8981\u7528\u4e8eModbus\u901a\u4fe1\u7684\u521d\u59cb\u5316\u548c\u5904\u7406\uff0c\u5b9e\u9645\u7684\u901a\u4fe1\u903b\u8f91\u548c\u54cd\u5e94\u5c06\u5728 process_rxd()<\/code> \u51fd\u6570\u4e2d\u5b9e\u73b0\u3002<\/p>\n\n\n\n
                                  \"Modbus\u901a\u4fe1\u534f\u8bae\u7684\u5b8c\u6574C\/C++\u6e90\u4ee3\u7801\u793a\u4f8b\u63d2\u56fe\"<\/figure>\n<\/span>","protected":false},"excerpt":{"rendered":"
                                  RXD \u8fd9\u662f\u4e00\u4e2a\u7528\u4e8e\u5904\u7406Modbus\u901a\u4fe1\u7684\u5d4c\u5165\u5f0fC\u4ee3\u7801\u793a\u4f8b\uff0c…<\/p>","protected":false},"author":1,"featured_media":25667,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[691],"tags":[281,633],"class_list":["post-25666","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-modbus-code-base","tag-281","tag-633"],"_links":{"self":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts\/25666","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/comments?post=25666"}],"version-history":[{"count":0,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts\/25666\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media\/25667"}],"wp:attachment":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media?parent=25666"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/categories?post=25666"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/tags?post=25666"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}