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77 lines
1.9 KiB
77 lines
1.9 KiB
/*
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* mb_sample_rtu_master.c
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*
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* Change Logs:
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* Date Author Notes
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* 2024-04-02 qiyongzhong first version
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*/
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#include "rtthread.h"
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#include "modbus.h"
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#ifdef MB_USING_SAMPLE_RTU_MASTER
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#define DBG_TAG "mb.rtu.master"
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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 = "uart1", //设备名
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.rtu.baudrate = 9600, //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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static void mb_sample_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 = 4000;
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int nb = 29;
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int total = mb_read_regs(hinst, addr, nb, regs);
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if (total <= 0)
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{
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LOG_E("modbus read register fail.");
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return;
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}
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LOG_D("modbus read register success.");
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for (int i=0; i<total; i++)
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{
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LOG_D("addr : %d, value : %d", addr + i, regs[i]);
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}
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}
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static void mb_sample_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_TCP);//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_sample_read_regs(hinst);
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rt_thread_mdelay(1000);
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}
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}
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static int mb_sample_rtu_master_startup(void)
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{
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rt_thread_t tid = rt_thread_create("mb-rtu-master", mb_sample_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_sample_rtu_master_startup);
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#endif
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