用户需要控制htsmb_mapping 中的值,主站如果读,, /** 功能:本函数完成modbus从站*/intmodbusRTUSlave(){modbus_t*ctx;intslaveAddr=13;uint8_tquerySlave[MODBUS_RTU_MAX_ADU_LENGTH];//接收数组/*libmodbus 从站使用modbus_mapping结构来处理需要主站读取的参数,包括4个参数* 如果不需要提供相关存储,设置为0...
query = malloc(MODBUS_TCP_MAX_ADU_LENGTH); } else { ctx = modbus_new_rtu(ip_or_device, 115200, 'N', 8, 1); modbus_set_slave(ctx, SERVER_ID); query = malloc(MODBUS_RTU_MAX_ADU_LENGTH); } header_length = modbus_get_header_length(ctx); modbus_set_debug(ctx, TRUE); mb_mappin...
static uint8_t ctx_send_buf[AGILE_MODBUS_MAX_ADU_LENGTH]; static uint8_t ctx_read_buf[AGILE_MODBUS_MAX_ADU_LENGTH]; static uint16_t hold_register[100]; static void mb_master_poll(void *parameter) { agile_modbus_rtu_t ctx_rtu; agile_modbus_t *ctx = &ctx_rtu._ctx; agile_modbus_...
msg_type);if(length_to_read !=0) { step = _STEP_META; }/* else switches straight to the next step */}break;case_STEP_META: length_to_read = compute_data_length_after_meta( ctx, msg, msg_type);if((msg_length + length_to_read) > (int)ctx->backend->max_adu_length) { errno...
nb, name, MODBUS_MAX_READ_REGISTERS); } else if (mapping_address < 0 || (mapping_address + nb) > nb_registers) { rsp_length = response_exception( ctx, &sft, MODBUS_EXCEPTION_ILLEGAL_DATA_ADDRESS, rsp, FALSE, "Illegal data address 0x%0X in %s\n", ...
uint8_t query[MODBUS_TCP_MAX_ADU_LENGTH]; //接受client报文 int rc = modbus_receive(ctx_, query); if (rc > 0) { //处理client报文 modbus_reply(ctx_, query, rc, mb_mapping_); } else{ printf("error %s\n", modbus_strerror(errno)); ...
MaxDataLen]; ucharidataSlaveOutputBuf[MaxRegLen];//Hight8bitofwordisfront,Low8bitisback高8位在前低8位在后 ucharidataSlaveInputBuf[MaxRegLen]; uchardata*port_at_0x7F; /*expdatadefine*/ //#defineSlaveAdrXBYTE[0xD800] sbitLED0=P1^0; sbitLED1=P1^1; sbitLED2=P1^2;
modbus_mapping_t *data_mapping; struct timeval timeout; int ret, go = 1; uint8_t query[MODBUS_TCP_MAX_ADU_LENGTH]; ctx = modbus_new_rtu(MODBUS_SERIAL_DEV, MODBUS_SERIAL_BAUDRATE, MODBUS_SERIAL_PARITY, MODBUS_SERIAL_DATABITS, MODBUS_SERIAL_STOPBITS); if (ctx == NULL) { fprintf(std...
单片机modbus 通讯
[2];21intDataBits[2];22intStopBit[2];2324intslave;//设备地址25intbaud;//波特率26charparity;//校验27intdata_bit;//数据位28intstop_bit;//停止位2930modbus_mapping_t *mb_mapping;31uint8_t query[MODBUS_RTU_MAX_ADU_LENGTH];3233voidrun();343536signals:3738publicslots:3940};4142#endif//...