紫陌才韵//返回AM栈中节点的am地址 command am_addr_t address();
//返回AM数据包的目的地址的AM地址
command am_addr_t destination(message_t* amsg);
//返回AM数据包中的原地址的AM地址
command am_addr_t source(message_t* amsg); //设置AM数据包的目的地址的AM地址
command void setDestination(message_t* amsg, am_addr_t addr); //设置AM数据包中的原地址的AM地址
command void setSource(message_t* amsg, am_addr_t addr);
//返回该信息是否为给本节点的，简单判断destination和address是否一致，广播可能出错 command bool isForMe(message_t* amsg); //返回AM数据包的AM类型，就是说包的类型 command am_id_t type(message_t* amsg);
//设置包的类型
command void setType(message_t* amsg, am_id_t t); //获得AM数据包的AM组
command am_group_t group(message_t* amsg); //设置AM数据包的AM组
command void setGroup(message_t* amsg, am_group_t grp); //返回本节点的AM组
command am_group_t localGroup(); }
AMSend：为基本的AM数据包提供发送接口
#include
interface AMSend {
//发送负载长度为len的数据，addr为发送地址
command error_t send(am_addr_t addr, message_t* msg, uint8_t len); //取消发送数据
command error_t cancel(message_t* msg);
//数据发送完成，成功返回SUCCESS，失败返回FAIL，被取消返回ECANCEL event void sendDone(message_t* msg, error_t error); //返回通信层提供的最大负载长度 command uint8_t maxPayloadLength(); //获取负载
command void* getPayload(message_t* msg, uint8_t len); }
通信的组件：此组件位于/tos/system的目录下
AMReceiverC:提供Receive，Packet和AMPacket的接口
#include \
generic configuration AMReceiverC(am_id_t amId) { provides {
interface Receive; interface Packet; interface AMPacket; } }
implementation {
components ActiveMessageC;
Receive = ActiveMessageC.Receive[amId]; Packet = ActiveMessageC; AMPacket = ActiveMessageC; }
generic的含义：普通的，可以在其他的程序中调用
AMSenderC：提供AMSend，Packet和AMPacket和ACK的接口 #include \
generic configuration AMSenderC(am_id_t AMId) { provides {
interface AMSend; interface Packet; interface AMPacket;
interface PacketAcknowledgements as Acks; } }
implementation {
#if defined(LOW_POWER_LISTENING)
components new LplAMSenderC(AMId) as SenderC; #else
components new DirectAMSenderC(AMId) as SenderC; #endif
AMSend = SenderC; Packet = SenderC; AMPacket = SenderC; Acks = SenderC; }
AMSnooperC：提供Receive，Packet和AMPacket的接口，进行嗅探的组件功能于AMRecieverC相同，用于接收#include \
generic configuration AMSnooperC(am_id_t AMId) { provides {
interface Receive; interface Packet; interface AMPacket; } }
implementation {
components ActiveMessageC;
Receive = ActiveMessageC.Snoop[AMId]; Packet = ActiveMessageC; AMPacket = ActiveMessageC; }
AMSnoopingReceiverC：提供Receive，Packet和AMPacket的接口，多了个ActiveMessageC.Receive[AMId]
#include \
generic configuration AMSnoopingReceiverC(am_id_t AMId) { provides {
interface Receive; interface Packet; interface AMPacket; } }
implementation {
components ActiveMessageC;
Receive = ActiveMessageC.Snoop[AMId]; Receive = ActiveMessageC.Receive[AMId]; Packet = ActiveMessageC; AMPacket = ActiveMessageC;
}
ActiveMessageAddressC：本module提供了get和set节点AM地址的commond。本module不是为一般用户提供坏网络栈，在了解其操作的情况下才可使用。
module ActiveMessageAddressC @safe() { provides {
interface ActiveMessageAddress;
async command am_addr_t amAddress();
async command void setAmAddress(am_addr_t a); } }
implementation {
am_addr_t addr = TOS_AM_ADDRESS;
am_group_t group = TOS_AM_GROUP;
async command am_addr_t ActiveMessageAddress.amAddress() { return call amAddress(); }
async command void ActiveMessageAddress.setAddress(am_group_t myGroup, am_addr_t myAddr) { atomic {
addr = myAddr; group = myGroup; }
signal ActiveMessageAddress.changed(); }
async command am_group_t ActiveMessageAddress.amGroup() { am_group_t myGroup; atomic myGroup = group; return myGroup; }
async command am_addr_t amAddress() { am_addr_t myAddr; atomic myAddr = addr; return myAddr; }
async command void setAmAddress(am_addr_t a) { atomic addr = a;
signal ActiveMessageAddress.changed(); }
default async event void ActiveMessageAddress.changed() { } }
TinyOS, address, 数据包, 以太网, 接口
TinyOS学习笔记8-简单发送接收数据
简单发送接收数据
本节为对BlinkToRadio的分析，从而了解简单的收发过程。 我们读BlinkToRadio修改如下：发送本节点的id给其他的节点 BlinkToRadio.h
#ifndef BLINKTORADIO_H #define BLINKTORADIO_H
enum {
AM_BLINKTORADIO = 6, //AM数据包的类型
TIMER_PERIOD_MILLI = 250 //发送的时间间隔为250ms };
//定义发送数据包的负载部分
typedef nx_struct BlinkToRadioMsg { nx_uint16_t nodeid; //本节点的id nx_uint16_t counter; //计数 } BlinkToRadioMsg;
#endif
BlinkToRadioC.nc 文件分析
#include
#include \
module BlinkToRadioC { //定义使用的接口
uses interface Boot; //从Boot开始启动 uses interface Leds; //led灯
