osd-contiki/tests/per.c

#include <mc1322x.h>
#include <board.h>
#include <stdio.h>

#include "tests.h"
#include "config.h"

/* This program communicates with itself and determines the packet */
/* error rate (PER) under a variety of powers and packet sizes  */
/* Each test the packets are sent and received as fast as possible */

/* The program first scans on channel 11 and attempts to open a test */
/* session with a node. After opening a session, the nodes begin the */
/* test sequence  */

#define DEBUG_MACA 1

/* how long to wait between session requests */
#define SESSION_REQ_TIMEOUT 10 /* phony seconds */

enum STATES {
	SCANNING,
	MAX_STATE
};

typedef uint32_t ptype_t;
enum PACKET_TYPE {
	PACKET_SESS_REQ,
	MAX_PACKET_TYPE
};
/* get protocol level packet type   */
/* this is not 802.15.4 packet type */
ptype_t get_packet_type(packet_t *p) {
	return MAX_PACKET_TYPE;
}

typedef uint32_t session_id_t;

/* phony get_time */
uint32_t get_time(void) {
	static volatile int32_t cur_time = 0;
	cur_time++;
	return cur_time;
}


#define random_short_addr() (*MACA_RANDOM & ones(sizeof(short_addr_t)*8))

void build_session_req(volatile packet_t *p) {
	p->length = 4;
	p->data[0] = 0xff;
	p->data[1] = 0x01;
	p->data[2] = 0x23;
	p->data[3] = 0x45;
	return;
}

void session_req(short_addr_t addr) { 	
	static volatile int time = 0;
	volatile packet_t *p;

//	if((get_time() - time) > SESSION_REQ_TIMEOUT) {
//		time = get_time();
		p = get_free_packet();
		build_session_req(p);
		tx_packet(p);
//	}
	return; 
}

void print_packet(packet_t *p) { return; }
session_id_t open_session(short_addr_t addr) { return 0; }

void main(void) {
	uint32_t state;
	volatile packet_t *p;
	session_id_t sesid;
	ptype_t type;
	short_addr_t addr, my_addr;
	
	uart_init(INC,MOD);
	
	print_welcome("Packet error test");

	/* standard radio initialization */
	reset_maca();
	radio_init();
	vreg_init();
	flyback_init();
	init_phy();
	free_all_packets();
	
	/* trim the reference osc. to 24MHz */
	pack_XTAL_CNTL(CTUNE_4PF, CTUNE, FTUNE, IBIAS);

	set_power(0x0f); /* 0dbm */
	set_channel(0); /* channel 11 */

	enable_irq(MACA);

	/* initial radio command */
        /* nop, promiscuous, no cca */
	*MACA_CONTROL = (1 << PRM) | (NO_CCA << MODE); 

	/* generate a random short address */
	my_addr = random_short_addr();

	state = SCANNING;
	while(1) { 
		
		switch(state) {
		case SCANNING:
			if((p = rx_packet())) {
				/* extract what we need and free the packet */
    				print_packet(p);
				type = get_packet_type(p);
				addr = p->addr;
				free_packet(p);
				/* pick a new address if someone else is using ours */
				if(addr == my_addr) {
					my_addr = random_short_addr();
					printf("DUP addr received, changing to new addr 0x%x02\n\r",my_addr);
				}
				/* if we have a packet */
				/* check if it's a session request beacon */
				if(type == PACKET_SESS_REQ) {
					/* try to start a session */
					sesid = open_session(p->addr);
				}
			}  else {
				session_req(my_addr);
			}
			break;
		default:
			break;
		}
					

	}

}