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/*
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#include <packages/qmodbus/inc/modbus.h>
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#include <packages/qmodbus/inc/modbus.h>
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2025-10-20 Administrator the first version
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* 2025-11-12 Modified Switch to IDLE interrupt mode (no DMA, no ringbuffer)
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* 2025-11-21 Fixed Enable RX_IDLE mode correctly for RT-Thread 5.1
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*/
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#include "rtthread.h"
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#include "modbus.h"
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#define DBG_TAG "plc.rtu"
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#define DBG_LVL DBG_LOG
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#include <rtdbg.h>
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static const mb_backend_param_t mb_bkd_prm = {
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.rtu.dev = "uart2", //设备名
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.rtu.baudrate = 57600, //波特率
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.rtu.parity = 0, //校验位, 0-无, 1-奇, 2-偶
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.rtu.pin = -1, //控制引脚, <0 表示不使用
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.rtu.lvl = 0 //控制发送电平
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};
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extern unsigned char sys_time[6];
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static void mb_plc_read_regs(mb_inst_t *hinst)
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{
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if (mb_connect(hinst) < 0)//连接失败, 延时返回
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{
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LOG_E("modbus connect fail.");
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return;
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}
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u16 regs[64];
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int addr = 7000;
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int nb = 10;
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int total = mb_write_regs(hinst, addr, nb, regs);
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if (total <= 0)
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{
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return;
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}
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u8 regsM[64];
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int addrM = 3000;
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int nbM = 10;
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int totalM = mb_read_bits(hinst, addrM, nbM, regsM);
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if (totalM <= 0)
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{
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return;
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}
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}
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static void mb_plc_thread(void *args)//线程服务函数
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{
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mb_inst_t *hinst = mb_create(MB_BACKEND_TYPE_RTU, &mb_bkd_prm);
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RT_ASSERT(hinst != NULL);
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mb_set_slave(hinst, 1);//修改从机地址, 默认地址为1, 可根据实际情况修改
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mb_set_prot(hinst, MB_PROT_RTU);//修改通信协议类型, RTU后端默认使用MODBUS-RTU通信协议
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mb_set_tmo(hinst, 500, 15);//修改超时时间, 应答超时500ms(默认300ms), 字节超时15ms(默认32ms)
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while(1)
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{
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mb_plc_read_regs(hinst);
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rt_thread_mdelay(50);
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}
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}
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static int mb_rtu_master_startup(void)
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{
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rt_thread_t tid = rt_thread_create("plc_rtu", mb_plc_thread, NULL, 2048, 5, 20);
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RT_ASSERT(tid != NULL);
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rt_thread_startup(tid);
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return(0);
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}
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INIT_APP_EXPORT(mb_rtu_master_startup);
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