PD3.0协议消息格式的解析和生成 数据消息的解析和生成，以及控制消息和数据消息的组装和发送代码

以下是一个简单的PD3.0协议数据消息格式的解析和生成的代码示例，以及控制消息和数据消息的组装和发送的代码示例，供参考：

解析数据消息：

void parse_data_message(uint8_t* data, uint32_t length) {
    uint16_t message_id = (data[0] << 8) | data[1];
    uint8_t object_type = (data[2] >> 4) & 0x0F;
    uint16_t object_id = ((data[2] & 0x0F) << 8) | data[3];
    uint8_t object_count = data[4];
    uint8_t* object_data = &data[5];

    // 根据不同的消息类型和对象类型，进行相应的操作
    // ...
}

生成数据消息：

void send_data_message(uint16_t message_id, uint8_t object_type, uint16_t object_id, uint8_t object_count, uint8_t* object_data) {
    uint8_t data[32];
    data[0] = (message_id >> 8) & 0xFF;
    data[1] = message_id & 0xFF;
    data[2] = (object_type << 4) | ((object_id >> 8) & 0x0F);
    data[3] = object_id & 0xFF;
    data[4] = object_count;
    memcpy(&data[5], object_data, object_count);

    // 将数据消息发送给接收设备
    // ...
}

组装和发送控制消息：

void send_control_request(uint8_t object_type, uint16_t object_id, uint8_t object_count, uint8_t* object_data) {
    uint16_t message_id = CONTROL_REQUEST | CONTROL_TO_DEVICE;
    send_control_message(message_id, object_type, object_id, object_count, object_data);
}

void send_control_response(uint8_t object_type, uint16_t object_id, uint8_t object_count, uint8_t* object_data) {
    uint16_t message_id = CONTROL_RESPONSE | CONTROL_TO_HOST;
    send_control_message(message_id, object_type, object_id, object_count, object_data);
}

组装和发送数据消息：

void send_data_message_to_device(uint8_t object_type, uint16_t object_id, uint8_t object_count, uint8_t* object_data) {
    uint16_t message_id = DATA_MESSAGE | DATA_TO_DEVICE;
    send_data_message(message_id, object_type, object_id, object_count, object_data);
}

void send_data_message_to_host(uint8_t object_type, uint16_t object_id, uint8_t object_count, uint8_t* object_data) {
    uint16_t message_id = DATA_MESSAGE | DATA_TO_HOST;
    send_data_message(message_id, object_type, object_id, object_count, object_data);
}

以上代码仅为示例，实际开发中还需要根据具体的需求进行调整和优化。同时，还需要实现PD3.0协议的通信流程控制和电源管理等功能。