Contiki introduction II-from what to how

Contiki tutorial II. From What to How Xu Dingxin 2011/09/05

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Two main data structures. ,[object Object],[object Object],[object Object],[object Object],struct process { struct process * next ; const char * name ; PT_THREAD ((* thread )( struct pt *, process_event_t , process_data_t )); struct pt pt ; unsigned char state , needspoll ; }; struct event_data { process_event_t ev ; process_data_t data ; struct process * p ; };

Types of System Events #define PROCESS_EVENT_NONE 0x80 #define PROCESS_EVENT_INIT 0x81 #define PROCESS_EVENT_POLL 0x82 #define PROCESS_EVENT_EXIT 0x83 #define PROCESS_EVENT_SERVICE_REMOVED 0x84 #define PROCESS_EVENT_CONTINUE 0x85 #define PROCESS_EVENT_MSG 0x86 #define PROCESS_EVENT_EXITED 0x87 #define PROCESS_EVENT_TIMER 0x88 #define PROCESS_EVENT_COM 0x89 #define PROCESS_EVENT_MAX 0x8a

How to Invoke a Process ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How to process events ,[object Object],[object Object],[object Object],int process_run(void) { /* Process poll events. */ if(poll_requested) { do_poll(); } /* Process one event from the queue */ do_event(); return nevents + poll_requested; }

Inter-process Communication ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TDMA MAC: buffer management ,[object Object],State 2: State 1: State 4: State 3:

TDMA MAC: slot scheduling ,[object Object],now = clock_time(); frame_start =now – now%FRAME_LENGTH; slot_start = frame_start + MY_SLOT*SLOT_LENGTH; slot_end = slot_start + SLOT_LENGTH;

Contiki introduction II-from what to how

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Viewers also liked

Viewers also liked (11)

Similar to Contiki introduction II-from what to how

Similar to Contiki introduction II-from what to how (20)

Recently uploaded

Recently uploaded (20)

Contiki introduction II-from what to how