一 概述

RS485通信協(xié)議是一種多點(diǎn)通信協(xié)議，它允許多個(gè)設(shè)備在同一總線上進(jìn)行通信，且每個(gè)設(shè)備都可以發(fā)送和接收數(shù)據(jù)。RS485通訊協(xié)議采用差分信號(hào)傳輸，具有高速、遠(yuǎn)距離、可靠性強(qiáng)等特點(diǎn)，可實(shí)現(xiàn)長(zhǎng)距離的數(shù)據(jù)傳輸。

RS485信號(hào)利用兩線之間的電壓差來(lái)傳遞邏輯信號(hào)，規(guī)定當(dāng)電壓差為+2V～+6V時(shí)為邏輯“1”，而電壓差為-2V～-6V時(shí)為邏輯“0”。這種傳輸方式對(duì)于外部干擾有良好的抵抗能力，可實(shí)現(xiàn)長(zhǎng)距離和高噪聲環(huán)境下的可靠傳輸。

RS485通信協(xié)議支持半雙工通信模式，在同一總線上可以連接多個(gè)驅(qū)動(dòng)器和接收器，方便建立設(shè)備網(wǎng)絡(luò)。此外，RS485通信協(xié)議的接口電平低，不易損壞芯片，電平與TTL電平兼容，方便與TTL電路連接。RS485通信協(xié)議是一種適用于工業(yè)控制系統(tǒng)和智能家居等領(lǐng)域的通信協(xié)議，具有高速、遠(yuǎn)距離、可靠性強(qiáng)等優(yōu)點(diǎn)，能夠滿足大量數(shù)據(jù)傳輸?shù)男枨螅⑻岣邤?shù)據(jù)傳輸?shù)男屎蛯?shí)時(shí)性。

二 RS485通信的優(yōu)缺點(diǎn)

1 RS485通信協(xié)議優(yōu)點(diǎn)：

抗干擾性強(qiáng)：RS485采用平衡驅(qū)動(dòng)器和差分接收器的組合，具有抗共模干擾能力，能夠抵抗外部干擾，保證通信的穩(wěn)定性。

傳輸距離遠(yuǎn)：RS485最大的通信距離約為1219米，最大傳輸速率為10Mbps，傳輸速率與傳輸距離成反比，可以在較長(zhǎng)的距離上進(jìn)行穩(wěn)定的數(shù)據(jù)傳輸。

通信速率高：RS485的數(shù)據(jù)最高傳輸速率為10Mbps，比傳統(tǒng)的串口通信協(xié)議快得多，可以滿足高速數(shù)據(jù)傳輸?shù)男枨蟆?/p>

支持多設(shè)備連接：RS485采用總線式拓?fù)浣Y(jié)構(gòu)，允許多個(gè)設(shè)備共享同一通信線路，方便實(shí)現(xiàn)設(shè)備之間的互連互通。

2 RS485通信協(xié)議缺點(diǎn)：

通信速率限制：雖然RS485支持高速數(shù)據(jù)傳輸，但隨著傳輸距離的增加，傳輸速率會(huì)受到限制。當(dāng)傳輸距離超過(guò)一定距離時(shí)，需要使用中繼器來(lái)擴(kuò)展傳輸距離。

連接設(shè)備數(shù)量限制：由于RS485采用總線式拓?fù)浣Y(jié)構(gòu)，連接的設(shè)備數(shù)量越多，線路越復(fù)雜，因此連接設(shè)備數(shù)量受到限制。

信號(hào)衰減問(wèn)題：在長(zhǎng)距離傳輸時(shí)，由于信號(hào)衰減和噪聲干擾等原因，可能會(huì)出現(xiàn)數(shù)據(jù)傳輸錯(cuò)誤或丟失的情況。因此，對(duì)于長(zhǎng)距離傳輸，需要采取措施來(lái)保證數(shù)據(jù)的準(zhǔn)確性和完整性。

三 物理層接口

RS485通信協(xié)議的物理層接口包括差分信號(hào)傳輸、DB9或RJ45接口以及信號(hào)定義等。

差分信號(hào)傳輸是RS485通信協(xié)議的核心技術(shù)，通過(guò)兩個(gè)信號(hào)線（A線和B線）來(lái)傳輸數(shù)據(jù)。A線傳輸數(shù)據(jù)的正信號(hào)，B線傳輸數(shù)據(jù)的負(fù)信號(hào)。這種差分信號(hào)的優(yōu)點(diǎn)是可以抵消干擾信號(hào)，提高通信的穩(wěn)定性。

在物理層接口中，RS485協(xié)議使用DB9或RJ45接口進(jìn)行連接。DB9接口包括A線、B線、地線和控制線等，而RJ45接口則采用水晶頭連接方式。

RS485通信協(xié)議的物理層還定義了電壓、時(shí)序、數(shù)據(jù)速率等參數(shù)。標(biāo)準(zhǔn)規(guī)定，邏輯1的電壓范圍為+2V～+6V，邏輯0的電壓范圍為-6V～-2V。在較長(zhǎng)的電纜長(zhǎng)度上，接收器接收到的電壓可能會(huì)降低到+/- 200 mV，但對(duì)于RS485仍然是完全可以接受的。RS485通信協(xié)議的物理層接口規(guī)定了通信協(xié)議的核心技術(shù)要求，包括差分信號(hào)傳輸、接口標(biāo)準(zhǔn)和信號(hào)定義等，以確保數(shù)據(jù)傳輸?shù)姆€(wěn)定性和可靠性。

四 RS485與Modbus的區(qū)別

物聯(lián)網(wǎng)的從業(yè)者，剛應(yīng)用RS485時(shí)，經(jīng)常會(huì)接觸到另外一個(gè)協(xié)議：Modbus協(xié)議，它與RS485有什么關(guān)系和區(qū)別呢？

RS485與Modbus的區(qū)別主要體現(xiàn)在以下三個(gè)方面：

協(xié)議性質(zhì)：RS485是一種物理層通信標(biāo)準(zhǔn)，主要定義了電氣特性、信號(hào)傳輸方式和連接方式等，而Modbus是一種通信協(xié)議，定義了一種常用的通信格式和規(guī)則，用于在主設(shè)備和從設(shè)備之間進(jìn)行數(shù)據(jù)交換。

應(yīng)用范圍：RS485通常用作物理層協(xié)議，支持Modbus協(xié)議，而Modbus更常用于工業(yè)控制領(lǐng)域，是一種通用的通信語(yǔ)言，支持RS485、RS232等串口。

功能特性：RS485具有較長(zhǎng)的通信距離、較強(qiáng)的抗干擾能力，支持多點(diǎn)、雙向通信，而Modbus支持主從模式，可以實(shí)現(xiàn)多個(gè)設(shè)備之間的數(shù)據(jù)交換。

所以，RS485和Modbus在協(xié)議性質(zhì)、應(yīng)用范圍和功能特性方面存在明顯的區(qū)別。在工業(yè)控制和智能設(shè)備通信領(lǐng)域，二者常常被結(jié)合使用，以實(shí)現(xiàn)高效、穩(wěn)定的數(shù)據(jù)傳輸。

四 綜述

RS485通信協(xié)議在物聯(lián)網(wǎng)中具有重要的地位和價(jià)值。首先，RS485協(xié)議是一種可靠、高效的通信協(xié)議，適用于多個(gè)設(shè)備之間的長(zhǎng)距離通信，能夠滿足物聯(lián)網(wǎng)中大量設(shè)備之間數(shù)據(jù)傳輸?shù)男枨?。其次，RS485協(xié)議具有抗干擾能力強(qiáng)、傳輸距離遠(yuǎn)、支持多設(shè)備連接等優(yōu)點(diǎn)，可以適應(yīng)復(fù)雜的物聯(lián)網(wǎng)環(huán)境，保證數(shù)據(jù)傳輸?shù)姆€(wěn)定性和可靠性。此外，RS485協(xié)議的傳輸層協(xié)議規(guī)定了數(shù)據(jù)傳輸?shù)母袷胶鸵?guī)則，包括數(shù)據(jù)幀的定義、傳輸順序、校驗(yàn)方式等，可以滿足物聯(lián)網(wǎng)中不同應(yīng)用場(chǎng)景的數(shù)據(jù)傳輸需求。

在物聯(lián)網(wǎng)中，RS485協(xié)議被廣泛應(yīng)用于各種領(lǐng)域，如工業(yè)控制、智能家居、城市管理、智能交通等。在這些領(lǐng)域中，RS485協(xié)議可以實(shí)現(xiàn)設(shè)備之間的快速、穩(wěn)定、可靠的數(shù)據(jù)傳輸，提高設(shè)備的智能化程度和用戶體驗(yàn)。例如，在智能家居中，RS485協(xié)議可以用于家庭內(nèi)部的各種設(shè)備之間的通信，包括智能電視、智能音響、智能照明、智能安防等，實(shí)現(xiàn)設(shè)備的互聯(lián)互通和集中控制。

AIoT星球君：RS485通信協(xié)議在物聯(lián)網(wǎng)中具有重要的地位和價(jià)值，它的優(yōu)點(diǎn)和特性使其成為工業(yè)控制系統(tǒng)和智能家居等領(lǐng)域的重要通信方式。通過(guò)使用RS485協(xié)議，可以實(shí)現(xiàn)設(shè)備的遠(yuǎn)程監(jiān)控和控制，提高設(shè)備的智能化程度和用戶體驗(yàn)。

五 組件的使用

1 Gitee鏈接地址

組件位于amaziot_bloom_os_sdklibrariesair_4g_swair_swam_485.c

Gitee源碼地址：https://gitee.com/ning./hongdou

Github源碼地址：https://github.com/ayumid/hongdou

2 應(yīng)用層組件功能介紹

提供485串口Modbus實(shí)例。實(shí)現(xiàn)輪詢，并將Modbus RTU 協(xié)議數(shù)據(jù)，轉(zhuǎn)發(fā)到服務(wù)器。

該組件需要和文件組件組合使用，文件中記錄了485總線中哪些設(shè)備目前在線等信息。

3 代碼講解

dtu_485_task_init

初始化modbus任務(wù)

void dtu_485_task_init(void)
{
    OSA_STATUS status = 0;

    /*creat message*/
    status = OSAMsgQCreate(&dtu_485_msgq, "dtu_485_msgq", DTU_485_TASK_MSGQ_MSG_SIZE, DTU_MODBUS_TASK_MSGQ_QUEUE_SIZE, OS_FIFO);
    ASSERT(status == OS_SUCCESS);

    status = OSATaskCreate(&dtu_485_msgq_task_ref, dtu_485_task_stack, DTU_485_TASK_STACK_SIZE, 161, "modbus_task", dtu_modbus_task, NULL);
    ASSERT(status == OS_SUCCESS);
}

dtu_alive_task

檢查設(shè)備在線情況任務(wù)，輪詢檢查，檢查最后一次收到信息和當(dāng)前時(shí)間的時(shí)間差，判斷是否離線

static void dtu_alive_task(void *ptr)
{
    OSA_STATUS status = 0;
    int i = 0;
    UINT32 timestamp = 0;
//    int id = 0;
    
    DTU_FILE_PARAM_T* dtu_file_ctx = NULL;

    dtu_file_ctx = dtu_get_file_ctx();
    
    while(1)
    {
//        uprintf("%s[%d] timer msgrn", __FUNCTION__, __LINE__);
        //for循環(huán)查詢列表中哪些指令激活，按照激活指令參數(shù)配置 指令
        for(i = 0; i < SW_DTU_NUM_MAX; i++)
        {
            //當(dāng)前列表第i指令被激活
            if(DTU_MODBUS_ACTIVE == dtu_file_ctx-?>modbus.cmd[i].active)
            {
                //獲取當(dāng)前時(shí)間
                timestamp = utils_utc8_2_timestamp();
                if(timestamp -  sw_dtu_alive[i].timercv > SW_DTU_TIMEOUT)
                {
                    sw_dtu_alive[i].alive = 0;
                }
                uprintf("%s[%d] slave addr: %d id: %d cmd: 0x%02Xn", __FUNCTION__, __LINE__, dtu_file_ctx->modbus.cmd[i].slave_addr, st_dtu_md.id + 1, dtu_file_ctx->modbus.cmd[i].fn);
            }
        }
        sleep(1);
    }
}

dtu_485_task

485主任務(wù)，接收發(fā)送485串口數(shù)據(jù)

static void dtu_485_task(void *ptr)
{
    OSA_STATUS status = 0;
    int ret = 0;
    int i = 0;
//    int id = 0;
    int send_len = 0;
    DTU_MSG_UART_DATA_PARAM_T uart_data = {0};
    uint8_t ctx_send_buf[AGILE_MODBUS_MAX_ADU_LENGTH];
    uint8_t ctx_read_buf[1];
//    uint8_t send[100] = {0};
//    uint8_t recv[100] = {0};
//    uint8_t* temp = NULL;
    DTU_FILE_PARAM_T* dtu_file_ctx = NULL;

    dtu_file_ctx = dtu_get_file_ctx();
    
    agile_modbus_rtu_t ctx_dtu = {0};
    agile_modbus_t *ctx = &ctx_dtu._ctx;
    agile_modbus_rtu_init(&ctx_dtu, ctx_send_buf, sizeof(ctx_send_buf), ctx_read_buf, sizeof(ctx_read_buf));

    dtu_modbus_interval_timer_init();
    st_dtu_md.state = DTU_MODBUS_POOLLING_STATE;

    if(DTU_MODBUS_TYPE_ENABLE == dtu_file_ctx->modbus.config.type)
    {
        dtu_modbus_interval_timer_start();
    }
//#define AGILE_MODBUS_FC_READ_COILS               0x01
//#define AGILE_MODBUS_FC_READ_DISCRETE_INPUTS     0x02
//#define AGILE_MODBUS_FC_READ_HOLDING_REGISTERS   0x03
//#define AGILE_MODBUS_FC_READ_INPUT_REGISTERS     0x04
//#define AGILE_MODBUS_FC_WRITE_SINGLE_COIL        0x05
//#define AGILE_MODBUS_FC_WRITE_SINGLE_REGISTER    0x06
//#define AGILE_MODBUS_FC_READ_EXCEPTION_STATUS    0x07
//#define AGILE_MODBUS_FC_WRITE_MULTIPLE_COILS     0x0F
//#define AGILE_MODBUS_FC_WRITE_MULTIPLE_REGISTERS 0x10
//#define AGILE_MODBUS_FC_REPORT_SLAVE_ID          0x11
//#define AGILE_MODBUS_FC_MASK_WRITE_REGISTER      0x16
//#define AGILE_MODBUS_FC_WRITE_AND_READ_REGISTERS 0x17
    while(1)
    {
        //阻塞1s等待從機(jī)回復(fù)的數(shù)據(jù)
        status = OSAMsgQRecv(dtu_modbus_msgq, (void *)&uart_data, DTU_MODBUS_TASK_MSGQ_MSG_SIZE, OSA_SUSPEND);

        if(status == OS_SUCCESS)
        {
            if(DTU_MODBUS_TIMER_INTERVAL_MSG == uart_data.id)
            {
//                uprintf("%s[%d] timer msgrn", __FUNCTION__, __LINE__);
                if(DTU_MODBUS_POOLLING_STATE == st_dtu_md.state)
                {
                    //for循環(huán)查詢列表中哪些指令激活，按照激活指令參數(shù)配置 指令
                    for(i = st_dtu_md.id; i < DTU_MODBUS_CMD_NUM; i++)
                    {
                        //當(dāng)前列表第i指令被激活
                        if(DTU_MODBUS_ACTIVE == dtu_file_ctx-?>modbus.cmd[i].active)
                        {
                            //設(shè)置從機(jī)地址
                            agile_modbus_set_slave(ctx, dtu_file_ctx->modbus.cmd[i].slave_addr);
                            uprintf("%s[%d] slave addr: %d id: %d cmd: 0x%02Xn", __FUNCTION__, __LINE__, dtu_file_ctx->modbus.cmd[i].slave_addr, st_dtu_md.id + 1, dtu_file_ctx->modbus.cmd[i].fn);
                        }
                        else
                        {
//                            uprintf("%s[%d] none cmd continue i:%d id: %dn", __FUNCTION__, __LINE__, i + 1, st_dtu_md.id);
                            st_dtu_md.id = i + 1;
                            continue;
                        }
                        //根據(jù)指令01 來(lái)組包
                        if(dtu_file_ctx->modbus.cmd[i].fn == AGILE_MODBUS_FC_READ_COILS)
                        {
                            //組包數(shù)據(jù)
                            send_len = agile_modbus_serialize_read_bits(ctx, dtu_file_ctx->modbus.cmd[i].reg_addr, dtu_file_ctx->modbus.cmd[i].reg_n_d);
                        }
                        //根據(jù)指令02 來(lái)組包
                        else if(dtu_file_ctx->modbus.cmd[i].fn == AGILE_MODBUS_FC_READ_DISCRETE_INPUTS)
                        {
                            //組包數(shù)據(jù)
                            send_len = agile_modbus_serialize_read_input_bits(ctx, dtu_file_ctx->modbus.cmd[i].reg_addr, dtu_file_ctx->modbus.cmd[i].reg_n_d);
                        }
                        //根據(jù)指令03 來(lái)組包
                        else if(dtu_file_ctx->modbus.cmd[i].fn == AGILE_MODBUS_FC_READ_HOLDING_REGISTERS)
                        {
                            //組包數(shù)據(jù)
                            send_len = agile_modbus_serialize_read_registers(ctx, dtu_file_ctx->modbus.cmd[i].reg_addr, dtu_file_ctx->modbus.cmd[i].reg_n_d);
                        }
                        //根據(jù)指令04 來(lái)組包
                        else if(dtu_file_ctx->modbus.cmd[i].fn == AGILE_MODBUS_FC_READ_INPUT_REGISTERS)
                        {
                            //組包數(shù)據(jù)
                            send_len = agile_modbus_serialize_read_input_registers(ctx, dtu_file_ctx->modbus.cmd[i].reg_addr, dtu_file_ctx->modbus.cmd[i].reg_n_d);
                        }
                        //根據(jù)指令05 來(lái)組包
                        else if(dtu_file_ctx->modbus.cmd[i].fn == AGILE_MODBUS_FC_WRITE_SINGLE_COIL)
                        {
                            //組包數(shù)據(jù)
                            send_len = agile_modbus_serialize_write_bit(ctx, dtu_file_ctx->modbus.cmd[i].reg_addr, dtu_file_ctx->modbus.cmd[i].reg_n_d);
                        }
                        //根據(jù)指令06 來(lái)組包
                        else if(dtu_file_ctx->modbus.cmd[i].fn == AGILE_MODBUS_FC_WRITE_SINGLE_REGISTER)
                        {
                            //組包數(shù)據(jù)
                            send_len = agile_modbus_serialize_write_register(ctx, dtu_file_ctx->modbus.cmd[i].reg_addr, dtu_file_ctx->modbus.cmd[i].reg_n_d);
                        }
//                        uprintf("%s[%d] find cmdrn", __FUNCTION__, __LINE__);
                        //當(dāng)前激活id，跳出這次循環(huán)
                        break;
                    }
                    st_dtu_md.id++;
//                    uprintf("%s[%d] sendbuf len: %d mdid: %drn", __FUNCTION__, __LINE__, send_len, st_dtu_md.id);
                    if(st_dtu_md.id > DTU_MODBUS_CMD_NUM)
                    {
                        st_dtu_md.id = 0;
                        st_dtu_md.state = DTU_MODBUS_POOLLING_WN_STATE;
                        uprintf("%s[%d] poolling  end", __FUNCTION__, __LINE__);
                        //停止modbus驅(qū)動(dòng)定時(shí)器
//                        dtu_modbus_interval_timer_stop();
                        //輪訓(xùn)完畢后，重新開始之前等待時(shí)間
//                        dtu_sleep(dtu_file_ctx->modbus.config.delay);
                        //開始modbus驅(qū)動(dòng)定時(shí)器
//                        dtu_modbus_interval_timer_start();
                    }
                    else
                    {
//                        uprintf("%s[%d] send md hexrn", __FUNCTION__, __LINE__);
//                        int j = 0;
//                        for(j = 0; j < send_len; j++)
//                        {
//                            uprintf("reg data[%d]: %Xrn", j, ctx-?>send_buf[j]);
//                        }
                        //發(fā)送數(shù)據(jù)到串口
                        UART_SEND_DATA(ctx->send_buf, send_len);
                    }
                }
                else if(DTU_MODBUS_POOLLING_WN_STATE == st_dtu_md.state)
                {
                    //for循環(huán)查詢列表中哪些指令激活，按照激活指令參數(shù)配置 指令
                    for(i = st_dtu_md.id; i < DTU_MODBUS_CMD_WN_NUM; i++)
                    {
                        //當(dāng)前列表第i指令被激活
                        if(DTU_MODBUS_ACTIVE == dtu_file_ctx-?>modbus.cmd_wn[i].active)
                        {
                            //設(shè)置從機(jī)地址
                            agile_modbus_set_slave(ctx, dtu_file_ctx->modbus.cmd_wn[i].slave_addr);
                            uprintf("%s[%d] slave addr: %d id: %d cmd: 0x%02X", __FUNCTION__, __LINE__, dtu_file_ctx->modbus.cmd_wn[i].slave_addr, st_dtu_md.id + 1, dtu_file_ctx->modbus.cmd_wn[i].fn);
                        }
                        else
                        {
//                            uprintf("%s[%d] none cmd continue i:%d id: %dn", __FUNCTION__, __LINE__, i + 1, st_dtu_md.id);
                            st_dtu_md.id = i + 1;
                            continue;
                        }
                        
                        //根據(jù)指令0F 來(lái)組包
//                        if(dtu_file_ctx->modbus.cmd_wn[i].fn == AGILE_MODBUS_FC_WRITE_MULTIPLE_COILS)
//                        {
//                            uprintf("cmd 0x10 regnum: %drn", dtu_file_ctx->modbus.cmd_wn[i].reg_n_d);
                            //組包數(shù)據(jù)
//                            send_len = agile_modbus_serialize_write_registers(ctx, dtu_file_ctx->modbus.cmd_wn[i].reg_addr, dtu_file_ctx->modbus.cmd_wn[i].reg_n, (UINT16*)&dtu_file_ctx->modbus.cmd_wn[i].reg_data);
//                            int j = 0;
//                            for(j = 0; j < dtu_file_ctx-?>modbus.cmd_wn[i].reg_n_d; j++)
//                            {
//                                uprintf("reg data[%d]: %Xrn", j, dtu_file_ctx->modbus.cmd_wn[i].reg_data[j]);
//                            }
//                        }
                        //根據(jù)指令10 來(lái)組包
                        if(dtu_file_ctx->modbus.cmd_wn[i].fn == AGILE_MODBUS_FC_WRITE_MULTIPLE_REGISTERS)
                        {
//                            uprintf("cmd 0x10 regnum: %drn", dtu_file_ctx->modbus.cmd_wn[i].reg_n_d);
                            //組包數(shù)據(jù)
                            send_len = agile_modbus_serialize_write_registers(ctx, dtu_file_ctx->modbus.cmd_wn[i].reg_addr, dtu_file_ctx->modbus.cmd_wn[i].reg_n, (UINT16*)&dtu_file_ctx->modbus.cmd_wn[i].reg_data);
//                            int j = 0;
//                            for(j = 0; j < dtu_file_ctx-?>modbus.cmd_wn[i].reg_n_d; j++)
//                            {
//                                uprintf("reg data[%d]: %Xrn", j, dtu_file_ctx->modbus.cmd_wn[i].reg_data[j]);
//                            }
                        }
//                        uprintf("%s[%d] find cmdrn", __FUNCTION__, __LINE__);
                        //當(dāng)前激活id，跳出這次循環(huán)
                        break;
                    }
                    st_dtu_md.id++;
//                    uprintf("%s[%d] sendbuf len: %d mdid: %drn", __FUNCTION__, __LINE__, send_len, st_dtu_md.id);
                    if(st_dtu_md.id > DTU_MODBUS_CMD_WN_NUM)
                    {
                        st_dtu_md.id = 0;
                        st_dtu_md.state = DTU_MODBUS_POOLLING_STATE;
                        uprintf("%s[%d] wn poolling end", __FUNCTION__, __LINE__);
                        //停止modbus驅(qū)動(dòng)定時(shí)器
                        dtu_modbus_interval_timer_stop();
                        //輪訓(xùn)完畢后，重新開始之前等待時(shí)間
                        dtu_sleep(dtu_file_ctx->modbus.config.delay);
                        //開始modbus驅(qū)動(dòng)定時(shí)器
                        dtu_modbus_interval_timer_start();
                    }
                    else
                    {
//                        uprintf("%s[%d] send md hexrn", __FUNCTION__, __LINE__);
//                        int j = 0;
//                        for(j = 0; j < send_len; j++)
//                        {
//                            uprintf("reg data[%d]: %Xrn", j, ctx-?>send_buf[j]);
//                        }
                        //發(fā)送數(shù)據(jù)到串口
                        UART_SEND_DATA(ctx->send_buf, send_len);
                    }
                }
            }
            else if(DTU_MODBUS_DATA_MSG == uart_data.id && NULL != uart_data.UArgs)
            {
//                uprintf("%s[%d] modbus res", __FUNCTION__, __LINE__);
//                
//                UINT8* p = uart_data.UArgs;
//                for (i = 0; i < uart_data.len; i++)
//                {
//                    uprintf("0x%02X" , p[i]);
//                }
                
                //如果是modbus數(shù)據(jù)，判斷目前是modbus rtu上報(bào)模式，modbus tcp上報(bào)模式，還是json上報(bào)格式
                if(DTU_MODBUS_RESPONSE_JSON_TYPE == dtu_file_ctx-?>modbus.config.res_type)
                {
                    uprintf("modbus json res");
                    dtu_modbus_json_modbus_res(uart_data.UArgs, uart_data.len);
                }
//                else if(DTU_MODBUS_RESPONSE_TCP_TYPE == dtu_file_ctx->modbus.config.res_type)
//                {
//                    //判斷是否是modbus一幀數(shù)據(jù)
//                    ret = dtu_modbus_protocol_check(uart_data.UArgs, uart_data.len);
//                    if(DTU_MODBUS_PROTOCOL_SUCCESS == ret)
//                    {
//                        uprintf("modbus tcp res");
//                    }
//                }
                else
                {
                    uprintf("modbus rtu res");
                    //modbus rtu幀，直接發(fā)
#ifdef DTU_BASED_ON_TCP
                    dtu_socket_write(uart_data.UArgs, uart_data.len);
#endif /* ifdef DTU_BASED_ON_TCP.2023-10-31 12:01:18 by: zhaoning */

#ifdef DTU_BASED_ON_MQTT
                    dtu_mqtt_send(uart_data.UArgs, uart_data.len);
#endif /* ifdef DTU_BASED_ON_MQTT.2023-10-31 12:01:28 by: zhaoning */
                }

                //釋放數(shù)據(jù)內(nèi)存
                free(uart_data.UArgs);
                //置空
                uart_data.UArgs = NULL;

            }
        }
    }
}

dtu_485_interval_timer_init

初始化指令間隔定時(shí)器，Modbus輪詢過(guò)程中每個(gè)指令之間的間隔時(shí)間

static void dtu_485_interval_timer_init(void)
{
    OSA_STATUS status = 0;
    
    //初始化指令間隔定時(shí)器
    status = OSATimerCreate(&st_dtu_md.md_timer_ref);
    ASSERT(status == OS_SUCCESS);
    
}

dtu_485_interval_timer_start

開始指令間隔定時(shí)器

void dtu_485_interval_timer_start(void)
{
    DTU_FILE_PARAM_T* dtu_file_ctx = NULL;
    
    dtu_file_ctx = dtu_get_file_ctx();

    OSATimerStart(st_dtu_md.md_timer_ref, dtu_file_ctx->modbus.config.interval * 200, dtu_file_ctx->modbus.config.interval * 200 , dtu_modbus_interval_timer_callback, 0);
}

4 Demo實(shí)戰(zhàn)

4.1 創(chuàng)建一個(gè)Demo

復(fù)制20.9_di_xtu示例工程，到同一個(gè)文件夾下，修改文件名為20.12_485_air_sw，如圖：

4.2 修改makefile

增加文件組件所在目錄頭文件路徑，和源文件路徑，以及一些宏定義，如圖：

-D是makefile中定義宏定義必要的前綴，可以搜索相關(guān)makefile學(xué)習(xí)文章學(xué)習(xí)相關(guān)知識(shí)。

DTU_BASED_ON_TCP 表示當(dāng)前是TCP模式，當(dāng)前組件使用需要am.h中包含一些對(duì)應(yīng)。

DTU_TYPE_5X6 表示使用SOM板貼片5x6卡，可以使用其它卡，修改為對(duì)應(yīng)宏定義就可以。

DTU_UART_115200_BAUD 表示使用115200波特率

DTU_TYPE_JSON_INCLUDE 表示把JSON功能包含進(jìn)來(lái)

4.3 增加頭文件

使用代碼編輯器，將新建的工程文件加入代碼編輯器中，打開main.c，修改main.c，加入am.h頭文件，如圖：

4.4 修改代碼

示例使用的是板載5x6卡，用戶的硬件可能是使用外置卡，或者是三合一全網(wǎng)通卡，因?yàn)橛布先N卡使用的模組SIM卡接口不一樣（外置卡SIM1，5x6卡和三合一卡SIM2），所以，需要通過(guò)一個(gè)全局變量來(lái)制定SIM卡硬件接口。

extern外部變量SDK_INIT_SIM_SELECT_VALUE，這里判斷了是否使用外置卡，這個(gè)宏定義在Makefile里面定義。

在Phase1Inits_enter中，宏定義判斷是否要包含對(duì)SDK_INIT_SIM_SELECT_VALUE變量的修改。

在Phase2Inits_exit 調(diào)用文件組件提供的對(duì)外API，如圖：

4.5 編譯

在SDK根目錄打開命令行，輸入命令.build.bat -l .amaziot_bloom_os_sdksamplelibraries20.14_modbus_xtu

PS F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08
λ .build.bat -l .amaziot_bloom_os_sdksamplelibraries20.14_485_air_sw
子目錄或文件 outbin 已經(jīng)存在。
子目錄或文件 buildcJSON 已經(jīng)存在。
子目錄或文件 buildobj 已經(jīng)存在。
gnumake: Entering directory `F:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.14_modbus_xtu'
armcc.exe -c  --cpu Cortex-R4 --no_unaligned_access -g -O2 --apcs /inter --diag_suppress 2084,1,2,177,188,223,550,1296,2795,6319,9931,9933 --diag_error=warning --gnu --thumb --loose_implicit_cast  -DDATA_COLLECTOR_IMPL -DISPT_OVER_SSP -DDIAG_SSP_DOUBLE_BUFFER_USE_DYNAMIC_ALLOCATION -DENV_XSCALE -DL1_DCXO_ENABLED -DLTE_HIGH_MOBILITY_OPTIMIZATION -DRUN_XIP_MODE -DCRANE_Z2 -DCA_LONG_IPC_MSG -DNEZHA3 -DNEZHA3_1826 -DUPGRADE_PLMS -DUPGRADE_PLMS_SR -DLTE_GSMMULTIBCCH -DGPLC_LTE_RSSI_SCAN -DL1V_NEW_RSSI -DUPGRADE_PLMS_3G -DUPGRADE_PLMS_L1 -DUPGRADE_FG_PLMS -DFG_PLMS_URR -DUPGRADE_L1A_FG_PLMS -DUPGRADE_PLMS_STAGE_2 -DUPGRADE_MBCCH -DMULTI_BCCH_READY_IND -DURR_MRAT_ICS_SEARCH -DUPGRADE_ICS -DMRAT_NAS -DUPGRADE_PLMS_SEARCH_API -DICS_MBCCH -DICS_MBCCH_2G_RSSI -DDIAG_NEWPP -DPHS_SW_DEMO -DPHS_SW_DEMO_TTC -DPHS_SW_DEMO_TTC_PM -DFULL_SYSTEM -D_DDR_INIT_ -D_TAVOR_HARBELL_ -DUPGRADE_ARBEL_PLATFORM -D_TAVOR_B0_SILICON_ -DTDL1C_SPY_ENABLE -DDLM_TAVOR -DTAVOR -DFLAVOR_DUALCORE -DDEBUG_D2_MOR_REG_RESEREVED_ENABLE -D_DIAG_USE_COMMSTACK_ -D_TAVOR_DIAG_ -DPM_DEBUG_MODE_ENABLED -DPM_D2FULL_MODE -DPM_EXT_DBG_INT_ARR -DFEATURE_WB_AMR_PS -DMACRO_FOR_LWG -DHL_LWG -DOPTIMIZE_FOR_2G_BCCH -DPLAT_TEST -D_FDI_USE_OSA_ -DPLAT_USE_THREADX -DLWIP_IPNETBUF_SUPPORT -DCRANE_MCU_DONGLE -DAT_OVER_UART -DPHS_SW_DEMO_TTC_PM -DUPGRADE_LTE_ONLY -DEXT_AT_MODEM_SUPPORT -DLTEONLY_THIN_SINGLE_SIM -DLFS_FILE_SYS -DLFS_FILE_SYS_V2 -DPSM_ENABLE -DNO_PAHO_MQTT -DNO_XML -DNO_LWM2M -DREMOVE_MBEDTLS -DNO_AT_NET -DCRANE_SD_NOT_SUPPORT -DNTP -DYMODEM_EEH_DUMP -DENABLE_DM_LTEONLY -DLTEONLY_THIN -DNO_EXTEND_MY_Q_AT -DNOT_SUPPORT_HTTPS -DNOT_SUPPORT_PM813 -DCRANEL_4MRAM -DREMOVE_PB -DUART_NEW_VERSION -DREMOVE_MEP -DREMOVE_SMS -DREMOVE_ENVSIM -DAPN_INCODE -DLTEONLY_THIN_SINGLE_SIM_2MFLASH -DASR160X_OPENCPU_FEATURE -DENABLE_UART3_FEATRUE -DENABLE_UART4_FEATRUE -DYUGE_MBEDTLS_3_2_1 -DENABLE_MAC_TX_DATA_LOGGING -DDISABLE_NVRAM_ACCESS -DINTEL_UPGRADE_EE_HANDLER_SUPPORT -DLTE_W_PS -DL1_DUAL_MODE -DUPGRADE_HERMON_DUAL -DINTEL_UPGRADE_DUAL_RAT -DINTEL_UPGRADE_GPRS_CIPHER_FLUSH -DUPGRADE_ENHANCED_QUAD_BAND -DINTEL_2CHIP_PLAT -DI_2CHIP_PLAT -DUPGRDE_TAVOR_COMMUNICATION -DRUN_WIRELESS_MODEM -DFLAVOR_DDR12MB_GB1MB5 -DFEATURE_SHMEM -DACIPC_ENABLE_NEW_CALLBACK_MECHANISM -DRELIABLE_DATA -DMAP_NSS -DTV_FNAME=""SW_PLATFORM=PMD2NONE PHS_SW_DEMO PHS_SW_DEMO_PM SRCNUCLEUS FULL_SYSTEM NOACRTC PDFLT PLAT_TEST PV2 DIAGOSHMEM NVM WITHL1V"" -DTV_FDESC=""SW_DESCRIPTION="" -DENABLE_ACIPC -D_DATAOMSL_ENABLED_ -DUSB_CABLE_DETECTION_VIA_PMIC -DMIPS_TEST -DMIPS_TEST_RAM -DFLAVOR_DIET_RAM -DNVM_INCLUDE -DMSL_INCLUDE -DMSL_POOL_MEM -DNO_AUDIO -DOSA_QUEUE_NAMES -D_DIAG_DISABLE_USB_ -DOSA_NUCLEUS -DOSA_USED -DPM_D2NONE_MODE -DCRANE_SOC_TEMPERATURE_SENSOR -DL1_SW_UPDATE_FOR_DIGRF -DPHS_L1_SW_UPDATE_R7 -DUPGRADE_LTE -DFRBD_CALIB_NVM -DFRBD_AGC_CALIB -DFRBD_FDT_CALIB -DHSPA_MPR -DCAPT_PARAMS_OPTIMIZE -DL1_WB_R99_ONLY -DL1V_WB_R99_ONLY -DINTERGRATED_RF_SUPPORT -DL1_RX_DIV_SUPPORT -DENABLE_OOS_HANDLING -DTAVOR_D2_WB_L1_SUPPORT -DL1_DDR_HIGH_FREQ -DUPGRADE_DIGRF3G_SUPPORT -DW_PS_PLUS_G_PAGING -D"NO_APLP=0" -DINTEL_UPGRADE_UNIFIED_VOICE_TASK -DINTEL_UPGRADE_R99 -DAPLP_SPY_ENABLE -D__TARGET_FEATURE_DOUBLEWORD -DWHOLE_UMTS_STACK -DUSE_TTPCOM_CSR_BLUETOOTH_AUDIO_GAIN_CONTROL -DL1_UPGRADE_R5 -DUPGRADE_EDGE -DUPGRADE_R4_FS1 -DINTEL_UPGRADE_GSM_CRL_IF -DUPGRADE_EGPRS_M -DINTEL_UPGRADE_EGPRS_M -DINTEL_UPGRADE_RF_PARAMS_IN_CF_TDS -DINTEL_UPGRADE_2SAMPLES_PER_SYMBOL -D"GPRS_MULTISLOT_CLASS=12" -D"EGPRS_MULTISLOT_CLASS=12" -DMARVELL_UPGRADE_BSIC_REDESIGN -DMSL_INCLUDE -DINTEL_HERMON_SAC -DCRANE_CUST_BUILD -DL1_SW_UPDATE_FOR_DIGRF -DFLAVOR_COM -DSILICON_PV2 -DSILICON_SEAGULL -DSILICON_TTC_CORE_SEAGULL -DPCAC_INCLUDE -Otime  -DBUILD_DATE=""11 22 2023"" -DBUILD_TIME=""11:19:00"" -Iatcmdsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyyugeinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalUARTinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalcoreinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalPMUinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalGPIOinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xosposixinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xdiagdiag_logicsrc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswSysCfginc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswplatforminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xenvwin32inc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswBSPinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswplatformdev_platbuild 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-IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilTickManagerinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopBSPinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyatcmdsrvinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyatparserinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonysdkinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcachttpclientinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacciinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcinclude -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludearch -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludeipv4 -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludeipv6 -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludelwip -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludenetif -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopmmi_matinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xtavorArbelinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xtavorenvinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonymodeminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacdusterinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacfotainc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalI2Cinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalACIPCinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilfatsysflash -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilFDIsrcINCLUDE -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalMMUinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilFDIsrcFDI_ADD -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilFDIsrcFM_INC -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilfatsysfshdr -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutillittlefsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacttsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacdialinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilcsw_memoryinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoputilitiesinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopcommpminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilnvminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilEEhandlerinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilEEhandlersrc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopRTCinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyci_clientinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalBT_deviceinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalUARTinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopmrdinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopdmainc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilsoftutilinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalSPIinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacwebsocketinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacatnet_srvinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilfotacomminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swAudioinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swACM_COMMinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swaudio_stubsrc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopaaminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swAudioHALinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhaldbgshellinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacopencpuinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08amaziot_bloom_os_sdkutils -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08CSDK_CODEcJSONinc -IF:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.14_modbus_xtuaminc -IF:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.14_modbus_xtuatcmdsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/librariesamxtu -DDTU_BASED_ON_TCP -DDTU_TYPE_5X6 -DDTU_UART_115200_BAUD -DDTU_TYPE_MODBUS_INCLUDE -DDTU_TYPE_JSON_INCLUDE -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/libraries/third_party/agile_modbus-1.1.3inc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/libraries/third_party/agile_modbus-1.1.3util  -o buildobj/ext_at_cmds.o F:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.14_modbus_xtu/atcmds/src/ext_at_cmds.c
armlink.exe buildobj/main.o buildobj/ext_at_cmds.o buildobj/ext_at_controller.o buildobj/am_file.o buildobj/am_at.o buildobj/am_trans.o buildobj/am_socket.o buildobj/am_hb.o buildobj/am_net.o buildobj/am_json.o buildobj/am_modbus.o buildobj/utils_string.o buildobj/agile_modbus_slave_util.o buildobj/agile_modbus.o buildobj/agile_modbus_rtu.o buildobj/agile_modbus_tcp.o buildCSDK_CODE.lib 
                -o F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08outbinArbel_PMD2NONE_40M.axf 
                --via F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08prebuilt_1606lArbel_PMD2NONE_targ_objliblist.txt 
                --elf 
                --scatter F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08prebuilt_1606lCrane_DS_4M_Ram_2M_Flash_XIP_CIPSRAM_Common_SingleSIM.sct 
                --predefine="-DLTEONLY_THIN_SINGLE_SIM" --map --symbols --info sizes,totals 
                --list F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08outbinArbel_PMD2NONE_40M.map 
                --keep init.o(Header) --keep init.o(Vectors) --diag_suppress 6312,6314,6319,6329 
                --feedback F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08outfeedbackLinkOptLteonlyThin_SingleSim_NoSMS.txt
F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08toolsbuildimage_1606l.bat
SDK_PROD_TYPE   : [DM]
SDK_CUST_SKU    : [THIN_SINGLE_SIM_NO_SMS]
SDK_PS_MODE     : [LTEONLY]
SDK_CHIP_VER    : [Z2A0]
SDK_OS_TYPE     : [TX]
Platform Convertion Tools v4.01 with PS option extension
Convertion done!
|INPUT   |outbincp_1606L.bin
|MARK    |NAME    |EXEADDR .LOADADDR.LENGTH  .CPZLADDR|COMPRESS STASTIC              |
|--------|--------|--------.--------.--------.--------|------------------------------|
|This Is LteOnly 4M|
|RW_CPZ_1|DDR_RW_ |7e11c000.8006b8a4.0000d290.8006c000|0000d290->00003000
|This Is LteOnly 4M|
|RW_CPZ_2|PS_NCAH |7e388000.80078b34.00001300.8006f000|00001300->00001000
|This Is LteOnly 4M|
|RW_CPZ_3|ITCM    |7e3dac00.80079e34.0000f51c.80070000|0000f51c->0000a000
|This Is LteOnly 4M|
|RW_CPZ_4|CODE_PS |7e1ad000.80089350.0002fcdc.8007a000|0002fcdc->0001e000
|This Is LteOnly 4M|
|RW_CPZ_5|CODEPSB |7e1df000.800b902c.000339bc.80098000|000339bc->0001b000
|This Is LteOnly 4M|
|RW_CPZ_6|CODEPSC |7e216000.800ec9e8.000323ec.800b3000|000323ec->0001b000
|This Is LteOnly 4M|
|RW_CPZ_7|CODEPSD |7e24c000.8011edd4.00028d88.800ce000|00028d88->0001a000
|This Is LteOnly 4M|
|RW_CPZ_8|CODEPSE |7e27a000.80147b5c.0002e310.800e8000|0002e310->0001a000
|This Is LteOnly 4M|
|RW_CPZ_9|CODEPSF |7e2ac000.80175e6c.0001c948.80102000|0001c948->00011000
|This Is LteOnly 4M|
|RW_CPZ_A|CODE_PL |7e2cd000.801927b4.0002f914.80113000|0002f914->0001e000
|This Is LteOnly 4M|
|RW_CPZ_B|CODEPLB |7e2fd000.801c20c8.00038d38.80131000|00038d38->00021000
|This Is LteOnly 4M|
|RW_CPZ_C|CODEPLC |7e337000.801fae00.000268d4.80152000|000268d4->00012000
|--------|--------|--------.--------.--------.--------|------------------------------|
|                                                     |      0x0020a6d4 -> 0x0014d000|
|                                                     |       2.041(MB) ->  1.301(MB)|
|------------------------------------------------------------------------------------|
cp_1606L.axf
cp_1606L.bin
cp_1606L.map
gnumake: Leaving directory `F:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.14_modbus_xtu'
"copy NEZHAC_CP_CNR_MIFI_TX.bin to ./ "

已復(fù)制         1 個(gè)文件。

4.6 生成固件

參考入門中開發(fā)工具，生成工具。

4.7 查看現(xiàn)象

固件下載到模組后，配置服務(wù)器地址，配置Modubs指令，之后用Modbus客戶端來(lái)模擬查看

[11-22 11:46:54:993]
[11-22 11:46:54:993]OK
[11-22 11:46:56:212]
[11-22 11:46:56:212]AT+TRANSIP="TCP","101.200.35.208",8866
[11-22 11:46:56:212]
[11-22 11:46:56:212]OK
[11-22 11:46:58:042]
[11-22 11:46:58:042]CONNECT OK
[11-22 11:46:59:123]
[11-22 11:46:59:123]AT+MBADD=1,1,1,1,0,10
[11-22 11:46:59:123]
[11-22 11:46:59:123]OK
[11-22 11:46:59:515]
[11-22 11:46:59:515]AT+MBADD=2,1,1,2,0,10
[11-22 11:46:59:515]
[11-22 11:46:59:515]OK
[11-22 11:47:00:287]
[11-22 11:47:00:287]AT+MBADD=3,1,1,3,0,10
[11-22 11:47:00:287]
[11-22 11:47:00:287]OK
[11-22 11:47:00:709]
[11-22 11:47:00:709]AT+MBADD=20,1,1,4,0,10
[11-22 11:47:00:709]
[11-22 11:47:00:709]OK
[11-22 11:47:01:172]
[11-22 11:47:01:172]AT+MBADD=49,1,1,5,0,10
[11-22 11:47:01:172]
[11-22 11:47:01:172]OK
[11-22 11:47:01:669]
[11-22 11:47:01:669]AT+MBADD=50,1,1,6,0,6666
[11-22 11:47:01:669]
[11-22 11:47:01:669]OK
[11-22 11:47:02:336]
[11-22 11:47:02:336]AT+MBADDWN=1,1,1,16,0,5,"16B352A9F615D7D3FE198"
[11-22 11:47:02:336]
[11-22 11:47:02:336]OK
[11-22 11:47:02:937]
[11-22 11:47:02:937]AT+MBCFG=1,1,3,6
[11-22 11:47:02:937]
[11-22 11:47:02:937]OK

5 總結(jié)

根據(jù)實(shí)驗(yàn)現(xiàn)象，用戶需要實(shí)現(xiàn)自己的AT指令，只需要參考組件中的例子，按照自己需求修改，

本文章源自奇跡物聯(lián)開源的物聯(lián)網(wǎng)應(yīng)用知識(shí)庫(kù)Cellular IoT Wiki，更多技術(shù)干貨歡迎關(guān)注收藏Wiki：Cellular IoT Wiki 知識(shí)庫(kù)（https://rckrv97mzx.feishu.cn/wiki/wikcnBvAC9WOkEYG5CLqGwm6PHf）

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