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。
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
3.实物操作体验
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
鸿蒙开发文档参考:qr23.cn/AKFP8k点击或者复制转到即可。
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
- 修改编译依赖
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" ]
}
- 修改编译方式
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"]
}
- 修改iot_link中的部分文件
-
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 0struct timeval timedelay = {timeout / 1000, (timeout % 1000) * 1000};if(NULL== uf){return ret;}fd = (int)(intptr_t)ctx; ///< socket could be zeroif (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\n", __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; #elseint 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 zeroif (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)\n", __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 <sys/socket.h> #include <sys/param.h> #include <sys/time.h> // #include <netinet/in.h> // #include <netinet/tcp.h> // #include <arpa/inet.h> // #include <netdb.h> #include <stdio.h> #include <unistd.h> #include <errno.h> #include <fcntl.h> #include <string.h> #include <stdlib.h> #endif#if defined(WIN32) #include <Iphlpapi.h> #else // #include <sys/ioctl.h> // #include <net/if.h> #endif
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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);
- 修改GPIO查找方式
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, 并在设置中开启手机的NFC功能;
- 写设备NFC标签;
- 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。