在介绍SDIO wifi Marvell8801/Marvell88w8801之前先附上模块链接： //

代码工程的GITHUB连接：
https://github.com/sj15712795029/stm32f1_marvell88w8801_marvell8801_wifi

Marvell自己实现驱动系列文章分为几篇介绍：

每篇更新打开专栏可以看到：

1. 上位机照片

功能如下：
①串口配置区，默认是921600的波特率
②Wi-Fi功能开启区
③STA功能调试区
④AP功能调试区
⑤PING功能调试区
⑥TCP功能调试区
⑦UDP功能调试区
⑧云服务器调试区
⑨Debug日志区
跟云服务器有关的界面如下：

2. 上位机与STM32通信格式

目前上位机跟开发板是通过串口来通信，通信格式是json，如果你没听过json，那么自行百度，跟WIFI PING相关的json格式分别如下：

1）上位机给STM32发送json的代码如下：

上位机用的c# winform,用的json库using Newtonsoft.Json，此库需要Newtonsoft.Json.dll库
发送代码如下：

private void json_construction_send(string func, string operate, string param1, string param2, string param3, string param4, string param5, string param6)
{
    json_commmand cmd = new json_commmand();
    cmd.FUNC = func;
    cmd.OPERATE = operate;
    cmd.PARAM1 = param1;
    cmd.PARAM2 = param2;
    cmd.PARAM3 = param3;
    cmd.PARAM4 = param4;
    cmd.PARAM5 = param5;
    cmd.PARAM6 = param6;
    string json_cmd = JsonConvert.SerializeObject(cmd);
#if  CONSOLE_DEBUG
    Console.WriteLine(json_cmd);
#endif
    if (serialPort1.IsOpen)
    {
        serialPort1.WriteLine(json_cmd);
    }
}

其中跟wifi ping相关的operate为：

string operate_wifi_mqtt_connect = "WIFI_MQTT_CONNECT";
string operate_wifi_mqtt_disconnect = "WIFI_MQTT_DISCONNECT";
string operate_wifi_mqtt_subcribe = "WIFI_MQTT_SUBCRIBE";
string operate_wifi_mqtt_unsubcribe = "WIFI_MQTT_UNSUBCRIBE";
string operate_wifi_mqtt_publish = "WIFI_MQTT_PUBLISH";

2）STM32收到json的命令解析框架

uint8_t uart_receive_parse(uint8_t *shell_string)
{
    uint8_t result = HW_ERR_OK;

    cJSON* parse_json = cJSON_Parse((const char *)shell_string);
    uint8_t* func_value = (uint8_t*)((cJSON *)cJSON_GetObjectItem(parse_json,"FUNC"))->valuestring;
    uint8_t* operate_value = (uint8_t*)((cJSON *)cJSON_GetObjectItem(parse_json,"OPERATE"))->valuestring;
    uint8_t* para1 = (uint8_t*)((cJSON *)cJSON_GetObjectItem(parse_json,"PARAM1"))->valuestring;
    uint8_t* para2 = (uint8_t*)((cJSON *)cJSON_GetObjectItem(parse_json,"PARAM2"))->valuestring;
    uint8_t* para3 = (uint8_t*)((cJSON *)cJSON_GetObjectItem(parse_json,"PARAM3"))->valuestring;
    uint8_t* para4 = (uint8_t*)((cJSON *)cJSON_GetObjectItem(parse_json,"PARAM4"))->valuestring;
    uint8_t* para5 = (uint8_t*)((cJSON *)cJSON_GetObjectItem(parse_json,"PARAM5"))->valuestring;

    if(strcmp((const char *)func_value,"WIFI") == 0)
    {
        if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_CONNECT") == 0)
        {
            HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_CONNECT\n");
            memset(mqtt_web_address,0,64);
            memset(mqtt_account,0,32);
            memset(mqtt_password,0,32);

            memcpy(mqtt_web_address,para1,strlen((const char*)para1));
            memcpy(mqtt_account,para2,strlen((const char*)para2));
            memcpy(mqtt_password,para3,strlen((const char*)para3));
            app_mqtt_connect_server();
            operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
            goto exit;

        }

        if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_DISCONNECT") == 0)
        {
            HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_DISCONNECT\n");
            app_mqtt_disconnect_server();
            operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
            goto exit;

        }

        if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_SUBCRIBE") == 0)
        {
            HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_SUBCRIBE\n");
            memset(mqtt_subcribe_topic,0,32);
            memcpy(mqtt_subcribe_topic,para1,strlen((const char*)para1));
            app_mqtt_subcribe();
            operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
            goto exit;

        }

        if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_UNSUBCRIBE") == 0)
        {
            HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_UNSUBCRIBE\n");
            app_mqtt_unsubcribe();
            operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
            goto exit;

        }

        if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_PUBLISH") == 0)
        {
            uint16_t data_len = atoi((const char*)para3);
            HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_PUBLISH\n");

            app_mqtt_publish(para1,para2,data_len);
            operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
            goto exit;

        }   
    }

    if(hw_strcmp((const char *)shell_string,"shop220811498.taobao.com") == 0)
        HW_DEBUG("welcome to use our stm32f1 camera wifi board\n");
    else
        HW_DEBUG("UART PARSE ERR:HW_ERR_SHELL_NO_CMD\n");

    result = HW_ERR_SHELL_NO_CMD;
exit:
    cJSON_Delete(parse_json);
    return result;
}

3）STM32给上位机发送json的代码如下：

uint8_t uart_send_json(uint8_t *func,uint8_t *operate,uint8_t *status,uint8_t *para1,uint8_t *para2,uint8_t *para3,uint8_t *para4,uint8_t *para5)
{
    uint8_t *wifi_status_string;
    cJSON *wifi_json_status = cJSON_CreateObject();

    cJSON_AddStringToObject(wifi_json_status, "FUNC", (const char*)func);
    cJSON_AddStringToObject(wifi_json_status, "OPERATE", (const char*)operate);
    cJSON_AddStringToObject(wifi_json_status, "STATUS", (const char*)status);

    if(para1)
        cJSON_AddStringToObject(wifi_json_status, "PARAM1", (const char*)para1);
    if(para2)
        cJSON_AddStringToObject(wifi_json_status, "PARAM2", (const char*)para2);
    if(para3)
        cJSON_AddStringToObject(wifi_json_status, "PARAM3", (const char*)para3);
    if(para4)
        cJSON_AddStringToObject(wifi_json_status, "PARAM4", (const char*)para4);
    if(para5)
        cJSON_AddStringToObject(wifi_json_status, "PARAM5", (const char*)para5);
    wifi_status_string = (uint8_t *)cJSON_Print(wifi_json_status);

    HW_DEBUG("%s\n",wifi_status_string);
    cJSON_Delete(wifi_json_status);
    free(wifi_status_string);

    return 0;
}

4）上位机接收STM32 json的代码如下

private void json_status_recv_parse(json_status status)
{
#if  CONSOLE_DEBUG
    Console.WriteLine("----------json_status_recv_parse-------------");
    Console.WriteLine("json func:"   status.FUNC);
    Console.WriteLine("json operate:"   status.OPERATE);
    Console.WriteLine("json status:"   status.STATUS);
    Console.WriteLine("json param1:"   status.PARAM1);
    Console.WriteLine("json param2:"   status.PARAM2);
    Console.WriteLine("json param3:"   status.PARAM3);
    Console.WriteLine("json param4:"   status.PARAM4);
    Console.WriteLine("json param5:"   status.PARAM5);
    Console.WriteLine("----------json_status_recv_parse  end--------");
#endif
    if (status.FUNC == "WIFI")
    {
        if (status.OPERATE == "WIFI_TCPS_RECV")
        {
            /* PARAM1:IP PARAM2:PORT PARMA3:DATA PARAM4:LENGTH */
            int tcp_recv_count = Convert.ToInt32(ltcp_recv_count.Text)   Convert.ToInt32(status.PARAM4);
            ltcp_recv_count.Text = tcp_recv_count.ToString();

            ttcp_recv.AppendText("收到IP:"   status.PARAM1   " 端口:"   status.PARAM2   " 数据:"   status.PARAM3   '\r'   '\n');
        }

        if (status.OPERATE == "WIFI_MQTT_SUBCRIBE_RECV")
        {
            tcloud_subcribe_data.AppendText(status.PARAM1   '\r'   '\n');
        }
    }
}

3. MQTT连接

1）上位机发送MQTT连接指令

private void bwifi_cloud_mqtt_con_Click(object sender, EventArgs e)
{
    if (tcloud_web_address.Text == "")
    {
        MessageBox.Show("请填入要连接的云服务器网址", "错误提示");
        return;
    }

    if (tcloud_acount.Text == "")
    {
        MessageBox.Show("请填入云服务器账号", "错误提示");
        return;
    }

    if (tcloud_password.Text == "")
    {
        MessageBox.Show("请填入云服务器密码", "错误提示");
        return;
    }

    json_construction_send(wifi_func, operate_wifi_mqtt_connect, tcloud_web_address.Text, tcloud_acount.Text, tcloud_password.Text, null, null, null);

}

2）STM32接收指令处理

if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_CONNECT") == 0)
{
    HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_CONNECT\n");
    memset(mqtt_web_address,0,64);
    memset(mqtt_account,0,32);
    memset(mqtt_password,0,32);

    memcpy(mqtt_web_address,para1,strlen((const char*)para1));
    memcpy(mqtt_account,para2,strlen((const char*)para2));
    memcpy(mqtt_password,para3,strlen((const char*)para3));
    app_mqtt_connect_server();
    operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
    goto exit;

}

4. MQTT断开

1）上位机发送MQTT断开指令

private void bwifi_cloud_mqtt_discon_Click(object sender, EventArgs e)
{
    json_construction_send(wifi_func, operate_wifi_mqtt_disconnect, null, null, null, null, null, null);

}

2）STM32接收指令处理

if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_DISCONNECT") == 0)
{
    HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_DISCONNECT\n");
    app_mqtt_disconnect_server();
    operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
    goto exit;

}

5. MQTT订阅

1）上位机发送MQTT订阅指令

private void bwifi_cloud_mqtt_subcribe_Click(object sender, EventArgs e)
{
    if (tcloud_subcribe.Text == "")
    {
        MessageBox.Show("请填入要订阅的主题", "错误提示");
        return;
    }
    json_construction_send(wifi_func, operate_wifi_mqtt_subcribe, tcloud_subcribe.Text, null, null, null, null, null);

}

2）STM32接收指令处理

if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_SUBCRIBE") == 0)
{
    HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_SUBCRIBE\n");
    memset(mqtt_subcribe_topic,0,32);
    memcpy(mqtt_subcribe_topic,para1,strlen((const char*)para1));
    app_mqtt_subcribe();
    operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
    goto exit;

}

6. MQTT取消订阅

1）上位机发送MQTT取消订阅指令

private void bwifi_cloud_mqtt_unsubcribe_Click(object sender, EventArgs e)
{
    json_construction_send(wifi_func, operate_wifi_mqtt_unsubcribe, tcloud_subcribe.Text, null, null, null, null, null);

}

2）STM32接收指令处理

if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_UNSUBCRIBE") == 0)
{
    HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_UNSUBCRIBE\n");
    app_mqtt_unsubcribe();
    operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
    goto exit;

}

7. MQTT接收订阅数据

1）STM32收到订阅主题的数据，发送给上位机

static void app_mqtt_incoming_data_cb(void *arg, const u8_t *data, u16_t len, u8_t flags)
{
    uint8_t index;
    uint8_t len_str[8] = {0};
    hw_sprintf((char*)len_str,"%d",len);

    printf("Incoming publish payload with length %d, flags %u\n", len, (unsigned int)flags);



    for(index = 0; index < len; index  )
    {
        printf("%c",data[index]);
    }
    printf("\n");

    memset(mqtt_subcribe_data,0,sizeof(mqtt_subcribe_data));
    memcpy(mqtt_subcribe_data,data,len);


    uart_send_json("WIFI","WIFI_MQTT_SUBCRIBE_RECV","SUCCESS",mqtt_subcribe_data,len_str,0,0,0);


    if(flags & MQTT_DATA_FLAG_LAST)
    {
        printf("MQTT_DATA_FLAG_LAST\n");
    }
    else
    {
        printf("~MQTT_DATA_FLAG_LAST\n");
    }
}

2）上位机处理订阅主题的数据

if (status.OPERATE == "WIFI_MQTT_SUBCRIBE_RECV")
{
    tcloud_subcribe_data.AppendText(status.PARAM1   '\r'   '\n');
}

8. MQTT推送

1）上位机发送MQTT推送指令

private void bcloud_publish_Click(object sender, EventArgs e)
{
    if (tcloud_publish_topic.Text == "")
    {
        MessageBox.Show("请填入要推送的主题", "错误提示");
        return;
    }
    if (tcloud_publish_data.Text == "")
    {
        MessageBox.Show("请填入要推送的内容", "错误提示");
        return;
    }
    json_construction_send(wifi_func, operate_wifi_mqtt_publish, tcloud_publish_topic.Text, tcloud_publish_data.Text, tcloud_publish_data.Text.Length.ToString(), null, null, null);

}

2）STM32接收指令处理

if(hw_strcmp((const char *)operate_value,"WIFI_MQTT_PUBLISH") == 0)
{
    uint16_t data_len = atoi((const char*)para3);
    HW_DEBUG("UART PARSE DEBUG:operate WIFI_MQTT_PUBLISH\n");

    app_mqtt_publish(para1,para2,data_len);
    operate_stauts_oled_show(func_value,operate_value,"SUCCESS",0,0,0,0,0,0);
    goto exit;

}