在nanopb中,string类型在生成c语言文件的时候,会有两种结构,一种是指定了最大长度的,一种是没有指定最大长度.指定了最大长度的string,会生成char[] 数组类型,没有指定最大长度的,会生成pb_callback_t类型.具体的可以参照nanopb文档 pb_callback_t 是一个结构体,有两个成员变量,一个是回调函数指针,这个回调函...
1. 第⼀步安装protobuf 去github上下载⼀个protobuf的版本,下载all版本,在本地解压缩之后,通过make install来安装.并安装python语⾔⽀持 bogon:protobuf-3.5-1.1 see$ ./configure ...(等待执⾏完成)bogon:protobuf-3.5-1.1 see$ make install ...(等待执⾏完成,protobuf就安装好了)bogon:...
voidtest_nest(void){RLOGD("lzq add for test_nest START >>>\n");/***写入数据***///Step 1.创建写入数据UserInfo userinfo;strcpy(userinfo.username,"linzhiqin");userinfo.age=18;userinfo.has_age=true;strcpy(userinfo.cars[0].name,"BMW");userinfo.cars[0].price=380000;strcpy(userinfo.cars[...
pb_callback_t callback_value; } MyUnion; ``` nanopb union类型的特点主要有以下几点: 1. 支持不同类型的数据:union类型可以存储bool、int32_t、float、double、字节数组和回调函数等不同类型的数据。 2. 省内存空间:union类型只会占用其中最大类型的内存空间,而不会分别占用每个成员的内存空间。 3. 灵活...
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Then the set-up callback has to be created: bool Oneof_decode(pb_istream_t *stream, const pb_field_t *field, void** arg){ Callback* msg = (Callback*)field->message; switch(field->tag){ case stringCallback_p_msg_tag:{ Serial.println("Oneof type: p_msg detected!"); payloadm...
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static bool checkreturn encode_basic_field(pb_ostream_t *stream, const pb_field_iter_t *field); static bool checkreturn encode_callback_field(pb_ostream_t *stream, const pb_field_iter_t *field); static bool checkreturn encode_field(pb_ostream_t *stream, pb_field_iter_t *field); ...
1. 第⼀步安装protobuf 去github上下载⼀个protobuf的版本,下载all版本,在本地解压缩之后,通过make install来安装.并安装python语⾔⽀持 bogon:protobuf-3.5-1.1 see$ ./configure ...(等待执⾏完成)bogon:protobuf-3.5-1.1 see$ make install ...(等待执⾏完成,protobuf就安装好了)bogon:...
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