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121 lines
2.6 KiB
121 lines
2.6 KiB
4 weeks ago
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/*
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* mb_sample_rtu_slave.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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4 weeks ago
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#include "modbus.h"
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4 weeks ago
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#ifdef MB_USING_SAMPLE_RTU_SLAVE
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#define DBG_TAG "mb.rtu.slave"
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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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#define MB_REG_ADDR_BEGIN 4000 //寄存器起始地址
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static u16 regs[] = {//寄存器数据
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2210,
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2220,
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2230,
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111,
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112,
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113,
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3000,
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1111,
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1112,
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1113,
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600,
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201,
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202,
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203,
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4000,
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8008,
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9009,
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2001,
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2002,
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2003,
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2004,
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101,
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102,
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103,
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104,
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1111,
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1112,
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1113,
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1114
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};
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//重新实现 modbus_port_slave.c 中的回调函数
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int mb_port_read_hold(u16 addr, u16 *preg)//读保持寄存器, 返回 : 0-成功, -2-地址错误
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{
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MB_ASSERT(preg != NULL);
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if (addr < MB_REG_ADDR_BEGIN)
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{
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return(-2);
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}
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if (addr >= (MB_REG_ADDR_BEGIN + sizeof(regs)/sizeof(regs[0])))
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{
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return(-2);
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}
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*preg = regs[addr - MB_REG_ADDR_BEGIN];
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return(0);
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}
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//重新实现 modbus_port_slave.c 中的回调函数
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int mb_port_write_hold(u16 addr, u16 reg)//写保持寄存器, 返回 : 0-成功, -2-地址错误, -3-值非法, -4-设备故障
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{
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if (addr < MB_REG_ADDR_BEGIN)
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{
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return(-2);
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}
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if (addr >= (MB_REG_ADDR_BEGIN + sizeof(regs)/sizeof(regs[0])))
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{
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return(-2);
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}
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regs[addr - MB_REG_ADDR_BEGIN] = reg;
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return(0);
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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_slave_fsm(hinst);//循环调用从机状态机
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}
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}
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static int mb_sample_rtu_slave_startup(void)
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{
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rt_thread_t tid = rt_thread_create("mb-rtu-slave", 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_slave_startup);
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#endif
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