一、简介本demo基于OpenHarmony3.1Beta版本开发,该样例能够接入数字管家应用,通过数字管家应用监测体重秤上报数据,获得当前测量到的体重,身高,并在应用端形成一段时间内记录的体重值,以折线图的形式表现出来,根据计算的BMI值来提醒当前身体健康状态,推送健康小知识。
1.交互流程如上图所示,智能体重称整体方案原理图可以大致分成:智能体重称设备、数字管家应用、云平台三部分。智能体重称通过MQTT协议连接华为IOT物联网平台,从而实现命令的接收和属性上报。 关于智能设备接入华为云IoT平台的详细细节可以参考 连接IOT云平台指南;智能设备同数字管家应用之间的设备模型定义可以参考profile .
2.实物简介
如上图示,左边为xr806模组,右边为超声波测距模块,echo脚连接PA19,Triq脚连接PA20,Vcc脚连接5V电源,Gnd脚接地,
如上图示,右边为称重模块,clk脚接PB15,dt脚接PB14,vcc脚接5V,gnd脚接地,称重传感器红色线接E+,黑色线接E-,白色线接A-,绿色线接A+
左边xr806模块左下角k1按键,长按k1按键不放,同时上电,4-5秒后松开按键,可以清除已保存得配网信息
xr806模块,在设备正常工作后,按k1按键,可以初始化当前得重量为0,高度为0
二、 快速上手1.硬件准备- xr806模组
- hcsr04超声波模块
- hx711称重模块带支架托盘
- 预装HarmonyOS手机一台
2、环境准备参照文档: XR806快速上手指导文档
3、编译前准备设备侧代码下载下载方式:使用git 命令下载,指令如下(用户也可以根据需要将该仓库fork到自己的目录下后进行下载)
- cd ~
- git clone git@gitee.com:openharmony-sig/knowledge_demo_smart_home.git
代码拷贝- cp -rfa ~/knowledge_demo_smart_home/dev/team_x ~/openharmony/vendor/
- cp -rfa ~/knowledge_demo_smart_home/dev/third_party/iot_link ~/openharmony/third_party/
SOC代码下载替换当前官方soc代码由于DHCP暂未适配,所以暂时不支持AP模式,这时需要下载并替换之前SOC代码。如果官方soc代码已修复该问题,可忽略此步骤。
- git clone https://gitee.com/moldy-potato-chips/xr806_-ap_mode.git
- mv ~/openharmony/device/soc/allwinner ~/allwinner.org // 不建议直接删除,
- cp -raf xr806_-ap_mode ~/openharmony/device/soc/allwinner
整合并修改完成后的目录结构如下图
修改文件打开 device/soc/allwinner/xradio/xr806/BUILD.gn,添加应用依赖(deps字段):
- module_group(module_name) {
- modules = [
- "src",
- "project",
- "include",
- ]
- configs = [
- ":SdkLdCconfig",
- ]
- deps = [ "//vendor/team_x/smart_weight_scale/demo_smart_weight_scale:smart_weight_scale" ]
- }
将demo依赖的库编译方式(static_library)修改为(source_set): 具体依赖查看demo_smart_weight_scale目录下的BUILD.gn:
- deps = [
- "../../common/iot_wifi_xradio:iot_wifi",
- "../../common/iot_cloud:iot_cloud",
- "//third_party/cJSON:cjson",
- "../../common/iot_boardbutton_xradio:iot_boardbutton",
- "../../common/iot_boardled_xradio:iot_boardled_xradio",
- ]
其中//third_party/cJSON目录下的BUILD.gn建议参照下面的修改:
- source_set("cJSON") {
- sources = [
- "cJSON.c",
- "cJSON_Utils.c",
- ]
- ldflags = [ "-lm" ]
- }
third_party/iot_link目录下的各级使用到的BUILD.gn也需要将编译方式修改为source_set,或者将所有需要编译的文件放在iot_link目录的BUILD.gn中,如下:
- source_set("iot_link") {
- sources = [
- "link_log/link_log.c",
- "link_misc/link_random.c",
- "link_misc/link_ring_buffer.c",
- "link_misc/link_string.c",
- "network/dtls/dtls_al/dtls_al.c",
- "network/dtls/mbedtls/mbedtls_port/dtls_interface.c",
- "network/dtls/mbedtls/mbedtls_port/mbed_port.c",
- "network/dtls/mbedtls/mbedtls_port/timing_alt.c",
- "network/mqtt/mqtt_al/mqtt_al.c",
- "network/mqtt/paho_mqtt/port/paho_mqtt_port.c",
- "network/mqtt/paho_mqtt/port/paho_osdepends.c",
- "network/mqtt/paho_mqtt/paho/MQTTClient-C/src/MQTTClient.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTConnectClient.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTConnectServer.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTDeserializePublish.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTFormat.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTPacket.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTSerializePublish.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTSubscribeClient.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTSubscribeServer.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTUnsubscribeClient.c",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src/MQTTUnsubscribeServer.c",
- "oc_mqtt/oc_mqtt_al/oc_mqtt_al.c",
- "oc_mqtt/oc_mqtt_profile_v5/oc_mqtt_profile.c",
- "oc_mqtt/oc_mqtt_profile_v5/oc_mqtt_profile_package.c",
- "oc_mqtt/oc_mqtt_profile_v5/oc_mqtt_event.c",
- "oc_mqtt/oc_mqtt_tiny_v5/oc_mqtt_tiny.c",
- "oc_mqtt/oc_mqtt_tiny_v5/hmac.c",
- "queue/queue.c",
- ]
-
- cflags = [ "-Wno-unused-variable" ]
- cflags += [ "-Wno-unused-but-set-variable" ]
- cflags += [ "-Wno-sign-compare" ]
- cflags += [ "-Wno-unused-parameter" ]
- cflags += [ "-Wno-unused-function" ]
- ldflags = [ "-Wl,-rpath-link=//device/xradio/xr806/xr_skylark/lib" ]
- ldflags += [ "-lmbedtls" ]
- include_dirs = [
- "inc",
- "link_log",
- "link_misc",
- "queue",
- "oc_mqtt/oc_mqtt_tiny_v5",
- "oc_mqtt/oc_mqtt_profile_v5",
- "oc_mqtt/oc_mqtt_al",
- "network/dtls/mbedtls/mbedtls_port",
- "network/mqtt/paho_mqtt/port",
- "network/mqtt/paho_mqtt/paho/MQTTClient-C/src",
- "network/mqtt/paho_mqtt/paho/MQTTPacket/src",
- "//third_party/mbedtls/include/",
- "//third_party/mbedtls/include/",
- "//third_party/cJSON",
- "//kernel/liteos_m/components/cmsis/2.0",
- "//device/xradio/xr806/xr_skylark/include/net/mbedtls-2.2.0/",
- ]
- defines = [
- "MQTTCLIENT_PLATFORM_HEADER=paho_osdepends.h",
- "WITH_DTLS",
- "MBEDTLS_AES_ROM_TABLES",
- "MBEDTLS_CONFIG_FILE="los_mbedtls_config_dtls.h"",
- "CONFIG_DTLS_MBEDTLS_CERT",
- "CONFIG_DTLS_MBEDTLS_PSK",
- "CFG_MBEDTLS_MODE=PSK_CERT",
- "CONFIG_OC_MQTT_TINY_ENABLE=1"
- ]
- }
- third_party/iot_link/network/mqtt/paho_mqtt/port/paho_mqtt_port.c
测试发现,当fd为0的时候,在执行recv时会立马返回-1,因此做下面规避操作。
- static int __socket_connect(Network *n, const char *host, int port)
- {
- ...
- int tmpfd = socket(AF_INET,SOCK_STREAM,0); // to skip fd = 0;
- fd = socket(AF_INET,SOCK_STREAM,0);
- if(fd == -1) {
- return ret;
- }
- close(tmpfd); // to skip fd = 0;
- ...
- }
- 系统setsockopt函数未适配,因此需要做下面的修改:
- static int __socket_read(void *ctx, unsigned char *buf, int len, int timeout)
- {
- int fd;
- int ret = 0;
- #if 0
- struct timeval timedelay = {timeout / 1000, (timeout % 1000) * 1000};
- if(NULL== uf)
- {
- return ret;
- }
-
- fd = (int)(intptr_t)ctx; ///< socket could be zero
- if (timedelay.tv_sec < 0 || (timedelay.tv_sec == 0 && timedelay.tv_usec <= 0))
- {
- timedelay.tv_sec = 0;
- timedelay.tv_usec = 100;
- }
-
- if(0 != setsockopt(fd,SOL_SOCKET,SO_RCVTIMEO,&timedelay,sizeof(struct timeval)))
- {
- return ret; //could not support the rcv timeout
- }
- int bytes = 0;
- while (bytes < len) {
- int rc = recv(fd, &buf[bytes], (size_t)(len - bytes), 0);
- printf("[%s|%s|%d]fd = %d, rc = %d
- ", __FILE__,__func__,__LINE__, fd, rc);
- if (rc == -1) {
- if (errno != EAGAIN && errno != EWOULDBLOCK) {
- bytes = -1;
- }
- break;
- } else if (rc == 0) {
- bytes = 0;
- break;
- } else {
- bytes += rc;
- }
- }
- return bytes;
- #else
- int bytes = 0;
- fd_set fdset;
- struct timeval timedelay = {timeout / 1000, (timeout % 1000) * 1000};
- if(NULL== buf)
- {
- return ret;
- }
-
- fd = (int)(intptr_t)ctx; ///< socket could be zero
- if (timedelay.tv_sec < 0 || (timedelay.tv_sec == 0 && timedelay.tv_usec <= 0))
- {
- timedelay.tv_sec = 0;
- timedelay.tv_usec = 100;
- }
- timedelay.tv_sec = 2;
- FD_ZERO(&fdset);
- FD_SET(fd, &fdset);
- ret = select(fd + 1, &fdset, NULL, NULL, &timedelay);
- if (ret > 0) {
- while (bytes < len) {
- int rc = recv(fd, &buf[bytes], (size_t)(len - bytes), 0);
- // printf("[%s|%s|%d]fd = %d, rc = %d, errno=%d(%s)
- ", __FILE__,__func__,__LINE__, fd, rc,errno, strerror(errno));
- if (rc == -1) {
- if (errno != EAGAIN && errno != EWOULDBLOCK) {
- bytes = -1;
- }
- break;
- } else if (rc == 0) {
- bytes = 0;
- break;
- } else {
- bytes += rc;
- }
- }
- }
- return bytes;
- #endif
- }
- third_party/iot_link/network/dtls/mbedtls/mbedtls_port/dtls_interface.c
在文件顶部添加打印函数定义以及添加mbedtls_calloc以及mbedtls_free的定义,否则编译会提示错误:
- #define MBEDTLS_LOG LINK_LOG_DEBUG
- #ifndef mbedtls_calloc
- #define mbedtls_calloc calloc
- #endif
- #ifndef mbedtls_free
- #define mbedtls_free free
- #endif
系统部分mbedtls接口不一致,固需要注释部分接口代码:
- mbedtls_ssl_context dtls_ssl_new(dtls_establish_info_s *info, char plat_type)
- {
- ...
- if (info->psk_or_cert == VERIFY_WITH_PSK)
- {
- /*
- if ((ret = mbedtls_ssl_conf_psk(conf,
- info->v.p.psk,
- info->v.p.psk_len,
- info->v.p.psk_identity,
- strlen((const char *)info->v.p.psk_identity))) != 0)
- {
- MBEDTLS_LOG("mbedtls_ssl_conf_psk failed: -0x%x", -ret);
- goto exit_fail;
- }
- */
- }
- ...
- }
- int dtls_shakehand(mbedtls_ssl_context *ssl, const dtls_shakehand_info_s *info)
- {
- ...
- if (MBEDTLS_SSL_IS_CLIENT == info->client_or_server)
- {
- ret = mbedtls_net_connect(server_fd, info->u.c.host, info->u.c.port, info->udp_or_tcp);
- if( 0 != ret)
- {
- ret = MBEDTLS_ERR_NET_CONNECT_FAILED;
- goto exit_fail;
- }
- }
- else
- {
- //server_fd = (mbedtls_net_context*)atiny_net_bind(NULL, info->u.s.local_port, MBEDTLS_NET_PROTO_UDP);
- ///< --TODO ,not implement yet
- }
- ...
- }
- void dtls_init(void)
- {
- (void)mbedtls_platform_set_calloc_free(calloc, free);
- (void)mbedtls_platform_set_snprintf(snprintf);
- // (void)mbedtls_platform_set_printf(printf);
- }
在iot_link/network/dtls/mbedtls/mbedtls_port/mbed_port.c文件中的dtls_imp_init()函数中,也需要注释掉未实现的接口,否则编译报错:
- int dtls_imp_init(void)
- {
- int ret =-1;
- // (void)mbedtls_platform_set_calloc_free(calloc, free);
- // (void)mbedtls_platform_set_snprintf(snprintf);
- // (void)mbedtls_platform_set_printf(printf);
- ret = dtls_al_install(&s_mbedtls_io);
- return ret;
- }
- 在文件iot_link/network/mqtt/paho_mqtt/port/paho_osdepends.c中添加对应timersub和timeradd的实现(系统中未实现该函数):
- // add this for "timersub" && "timeradd"
- #ifndef timersub
- #define timersub(s,t,a) (void) ( (a)->tv_sec = (s)->tv_sec - (t)->tv_sec,
- ((a)->tv_usec = (s)->tv_usec - (t)->tv_usec) < 0 &&
- ((a)->tv_usec += 1000000, (a)->tv_sec--) )
- #endif
- #ifndef timeradd
- #define timeradd(s,t,a) (void) ( (a)->tv_sec = (s)->tv_sec + (t)->tv_sec,
- ((a)->tv_usec = (s)->tv_usec + (t)->tv_usec) >= 1000000 &&
- ((a)->tv_usec -= 1000000, (a)->tv_sec++) )
- #endif
- 编译中会有部分头文件提示找不到,这个时候直接将其注释即可(iot_link/network/mqtt/paho_mqtt/port/paho_osdepends.h):
- #define INVALID_SOCKET SOCKET_ERROR
- // #include
- #include
- #include
- // #include
- // #include
- // #include
- // #include
- #include
- #include
- #include
- #include
- #include
- #include
- #endif
- #if defined(WIN32)
- #include
- #else
- // #include
- // #include
- #endif
- 因为弱引用导致无法链接相关符号,因此需要注释以下几个文件中的弱引用。
- 文件一 third_party/iot_link/network/dtls/dtls_al/dtls_al.c
- #if 0
- __attribute__((weak)) int dtls_imp_init(void)
- {
- LINK_LOG_DEBUG("%s:###please implement dtls by yourself####",__FUNCTION__);
- return -1;
- }
- #endif
- extern int dtls_imp_init(void);
- 文件二 third_party/iot_link/network/mqtt/mqtt_al/mqtt_al.c
- #if 0
- __attribute__((weak)) int mqtt_imp_init(void)
- {
- LINK_LOG_DEBUG("%s:###please implement mqtt by yourself####",__FUNCTION__);
- return -1;
- }
- #endif
- extern int mqtt_imp_init(void);
- 文件三 third_party/iot_link/oc_mqtt/oc_mqtt_al/oc_mqtt_al.c
- #if 0
- __attribute__ ((weak)) int oc_mqtt_imp_init(void)
- {
- LINK_LOG_DEBUG("%s:###please implement oc mqtt by yourself####",__FUNCTION__);
- return 0;
- }
- __attribute__ ((weak)) int oc_mqtt_demo_main(void)
- {
- LINK_LOG_WARN("Please implement the oc mqtt v5 demo yourself");
- return -1;
- }
- #endif
- extern int oc_mqtt_demo_main(void);
因为GPIO框架修改了设备驱动注册的管脚号,导致应用无法根据HCS的引脚操作对应的GPIO,此问题已经提issue,如果该问题已解决,可以忽略此步骤。
打开drivers/framework/support/platform/src/gpio/gpio_manager.c,将cntlr->start = start;注释即可。
- static int32_t GpioManagerAdd(struct PlatformManager *manager, struct PlatformDevice *device)
- {
- uint16_t start;
- struct GpioCntlr *cntlr = CONTAINER_OF(device, struct GpioCntlr, device);
- if ((start = GpioCntlrQueryStart(cntlr, &manager->devices)) >= GPIO_NUM_MAX) {
- PLAT_LOGE("GpioCntlrAdd: query range for start:%d fail:%d", cntlr->start, start);
- return HDF_ERR_INVALID_PARAM;
- }
- // cntlr->start = start;
- DListInsertTail(&device->node, &manager->devices);
- PLAT_LOGI("%s: start:%u count:%u", __func__, cntlr->start, cntlr->count);
- return HDF_SUCCESS;
- }
- 将对应的驱动文件复制到drvier对应目录:
因为主仓代码中未将对应的驱动文件合并到driver/adpater/platform对应的目录下,固需要手动将文件拷贝到对应目录。若主仓已合入,可忽略此步骤。
- // 拷贝gpio驱动
- cp -af device/soc/allwinner/xradio/drivers/gpio/gpio_xradio.* driver/adpater/platform/gpio
- // 修改driver/adpater/platform/gpio/BUILD.gn文件,加上gpio_xradio的编译
- hdf_driver(module_name) {
- sources = []
- if (defined(LOSCFG_SOC_COMPANY_BESTECHNIC)) {
- sources += [ "gpio_bes.c" ]
- }
- if (defined(LOSCFG_SOC_COMPANY_ALLWINNER)) {
- sources += [ "gpio_xradio.c" ]
- }
- include_dirs = [ "." ]
- }
为了节省ram资源,可以把无用的资源先关闭,如关闭内部codec,将 device/soc/allwinner/xradio/xr806/project/prj_config.h中的PRJCONF_INTERNAL_SOUNDCARD_EN设置为0,如下:
- /* Xradio internal codec sound card enable/disable */
- #define PRJCONF_INTERNAL_SOUNDCARD_EN 0
4、代码编译- #首先可以查看一下hb的版本,如果hb版本为0.4.4版本就不需要更新。
- ```
- ## 查看hb版本
- hb --version
- ## 更新hb, 以下指令需要在openharmony SDK根目录执行
- pip3 uninstall ohos_build
- pip3 install build/lite
- ```
- 编译命令:
- hb set // 如果是第一次编译,Input code path 命令行中键入"./" 指定OpenHarmony工程编译根目录后 回车,
- 如下图所示,使用键盘上下键选中wifi_skylark
- hb build // 如果需要全量编译,可以添加-f 选项
生成的固件保存在out/xradio/smart_weight_scale目录下
5、固件烧录参照文档: XR806快速上手指导文档
6、设备配网- 在设备上电前需准备好安装了数字管家应用的HarmonyOS手机,详情见数字管家应用开发, 并在设置中开启手机的NFC功能;
- 写设备NFC标签,详细操作见设备NFC标签指导文档;
- 烧录完成后,上电。开发者在观察开发板上状态LED灯以8Hz的频率闪烁时,将手机上半部靠近开发板NFC标签处(无NFC标签的可用NFC贴纸替代);
- 碰一碰后手机将自动拉起数字管家应用并进入配网状态;
- 配网过程中需要 连接设备的AP热点,然后填写需要配置的wifi的密码;
- 最后点击配置,手机会将ssid以及对应的密码通过AP热点发送到设备。