1# Coap协议的通信实验<a name="ZH-CN_TOPIC_0000001130176841"></a> 2## 硬件环境搭建 3- 硬件要求：Hi3861V100核心板、扩展板；硬件搭建及组网图如下图所示。 4- [Hi3861V100核心板参考：HiSpark_WiFi_IoT智能开发套件_原理图硬件资料\原理图\HiSpark_WiFi-IoT_Hi3861_CH340G_VER.B.pdf](http://gitee.com/hihope_iot/embedded-race-hisilicon-track-2022/blob/master/%E7%A1%AC%E4%BB%B6%E8%B5%84%E6%96%99/HiSpark_WiFi_IoT%E6%99%BA%E8%83%BD%E5%AE%B6%E5%B1%85%E5%BC%80%E5%8F%91%E5%A5%97%E4%BB%B6_%E5%8E%9F%E7%90%86%E5%9B%BE.rar) 5- [扩展板参考：HiSpark_WiFi_IoT智能开发套件_原理图硬件资料\原理图\HiSpark_WiFi-IoT_Hi3861_CH340G_VER.B.pdf](http://gitee.com/hihope_iot/embedded-race-hisilicon-track-2022/blob/master/%E7%A1%AC%E4%BB%B6%E8%B5%84%E6%96%99/HiSpark_WiFi_IoT%E6%99%BA%E8%83%BD%E5%AE%B6%E5%B1%85%E5%BC%80%E5%8F%91%E5%A5%97%E4%BB%B6_%E5%8E%9F%E7%90%86%E5%9B%BE.rar) 6 7 8 9## 软件介绍 10 11- 1.代码目录结构及相应接口功能介绍 12``` 13vendor_hisilicon/hispark_pegasus/demo/coap_demo 14├── app_demo_iot.c # 15├── BUILD.gn # BUILD.gn文件由三部分内容（目标、源文件、头文件路径）构成,开发者根据需要填写,static_library中指定业务模块的编译结果，为静态库文件led_example，开发者根据实际情况完成填写。 16| sources中指定静态库.a所依赖的.c文件及其路径，若路径中包含"//"则表示绝对路径（此处为代码根路径），若不包含"//"则表示相对路径。include_dirs中指定source所需要依赖的.h文件路径。 17├── cjson_init.c # 18├── coap_client.c # 19├── coap_service.c # 20├── iot_config.h # 21├── iot_hmac.c # 22├── iot_hmac.h # 23├── iot_log.c # 24├── iot_log.h # 25├── iot_main.c # 26├── iot_main.h # 27├── iot_profile.c # 28├── iot_profile.h # 29└── iot_sta.c # 30``` 31- 2.工程编译 32 - 将源码./vendor/hisilicon/hispark_pegasus/demo/coap_demo整个文件夹及内容复制到源码./applications/sample/wifi-iot/app/下。 33 ``` 34 . 35 └── applications 36 └── sample 37 └── wifi-iot 38 └── app 39 └──coap_demo 40 └── 代码 41 ``` 42 - 修改./applications/sample/wifi-iot/app/coapdemo/iot_config.h中CONFIG_AP_SSID，CONFIG_AP_PWD为WiFi名称和WiFi密码。 43 ``` 44 #define CONFIG_AP_SSID "xxx" // WIFI SSID 45 #define CONFIG_AP_PWD "xxxxxx" // WIFI PWD 46 ``` 47 - 如果编译coap_service服务端，修改./applications/sample/wifi-iot/app/coapdemo/BUILD.gn文件中,在sources = [ "coap_service.c" ]字段中添加。 48 ``` 49 static_library("appDemoIot") { 50 sources = [ 51 "app_demo_iot.c", 52 "cjson_init.c", 53 "coap_service.c", 54 "iot_hmac.c", 55 "iot_log.c", 56 "iot_main.c", 57 "iot_profile.c", 58 "iot_sta.c", 59 #"coap_client.c", 60 ] 61 62 include_dirs = [ 63 "./", 64 "//utils/native/lite/include", 65 "//kernel/liteos_m/kal/cmsis", 66 "//base/iothardware/peripheral/interfaces/inner_api", 67 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/lwip_sack/include/lwip", 68 "//third_party/cJSON", 69 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/mbedtls/include/mbedtls", 70 "//foundation/communication/wifi_lite/interfaces/wifiservice", 71 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/paho.mqtt.c/include/mqtt", 72 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/libcoap/include/coap2", 73 ] 74 defines = [ "WITH_LWIP" ] 75 } 76 ``` 77 78 - 修改源码./applications/sample/wifi-iot/app下的BUILD.gn文件，在features字段中增加索引，使目标模块参与编译。features字段指定业务模块的路径和目标,features字段配置如下。 79 ``` 80 import("//build/lite/config/component/lite_component.gni") 81 82 lite_component("app") { 83 features = [ 84 "coap_demo:appDemoIot", 85 ] 86 } 87 ``` 88 89 - 修改完成后编译rebuild,烧录到Hi3861V100开发板上，烧录成功后，再次点击Hi3861核心板上的“RST”复位键，在串口工具栏可以看到server服务端IP地址。 90 91  92 93 - 配置./applications/sample/wifi-iot/app/coap_demo/iot_config.h中字段PARAM_SERVER_ADDR里面主机IP地址。 94 ``` 95 #define CONFIG_AP_SSID "xxx" // WIFI SSID 96 #define CONFIG_AP_PWD "xxxxxx" // WIFI PWD 97 #define PARAM_SERVER_ADDR "xxxxxxxx" 98 ``` 99 - 如果编译coap_client客户端，修改./applications/sample/wifi-iot/app/lwip_demo/BUILD.gn文件中,在sources = [ "coap_client.c" ]字段中添加。 100 ``` 101 static_library("appDemoIot") { 102 sources = [ 103 "app_demo_iot.c", 104 "cjson_init.c", 105 #"coap_service.c", 106 "iot_hmac.c", 107 "iot_log.c", 108 "iot_main.c", 109 "iot_profile.c", 110 "iot_sta.c", 111 "coap_client.c", 112 ] 113 114 include_dirs = [ 115 "./", 116 "//utils/native/lite/include", 117 "//kernel/liteos_m/kal/cmsis", 118 "//base/iothardware/peripheral/interfaces/inner_api", 119 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/lwip_sack/include/lwip", 120 "//third_party/cJSON", 121 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/mbedtls/include/mbedtls", 122 "//foundation/communication/wifi_lite/interfaces/wifiservice", 123 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/paho.mqtt.c/include/mqtt", 124 "//device/soc/hisilicon/hi3861v100/sdk_liteos/third_party/libcoap/include/coap2", 125 ] 126 defines = [ "WITH_LWIP" ] 127 } 128 ``` 129 130 - 修改源码./applications/sample/wifi-iot/app下的BUILD.gn文件，在features字段中增加索引，使目标模块参与编译。features字段指定业务模块的路径和目标,features字段配置如下。 131 ``` 132 import("//build/lite/config/component/lite_component.gni") 133 134 lite_component("app") { 135 features = [ 136 "coap_demo:appDemoIot", 137 ] 138 } 139 ``` 140 141 - 工程相关配置完成后,然后rebuild编译。 142- 3.烧录 143 - 编译成功后，点击DevEco Home->配置工程->hi3861->upload_port->选择对应串口端口号->选择upload_protocol->选择hiburn-serial->点击save保存，在保存成功后点击upload进行烧录，出现connecting, please reset device..字样复位开发板等待烧录完成。 144 - 烧录成功后，再次点击Hi3861核心板上的“RST”复位键，此时开发板的系统会运行起来。运行结果：服务端设备在串口工具显示Hello coap，客户端在串口工具显示scheduling for xxxx ticks。
