osd-contiki/tests/per.c

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C
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#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
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/* how long to wait between session requests */
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#define SESSION_REQ_TIMEOUT 10000 /* phony seconds */
enum STATES {
SCANNING,
MAX_STATE
};
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typedef uint32_t ptype_t;
enum PACKET_TYPE {
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PACKET_SESS_REQ,
MAX_PACKET_TYPE
};
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/* 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->offset = 0;
p->data[0] = 0x01;
p->data[1] = 0x02;
p->data[2] = 0x03;
p->data[3] = 0x04;
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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();
if((p = get_free_packet())) {
build_session_req(p);
tx_packet(p);
}
}
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return;
}
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session_id_t open_session(short_addr_t addr) { return 0; }
void main(void) {
uint32_t state;
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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();
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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 */
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enable_irq(MACA);
/* initial radio command */
/* nop, promiscuous, no cca */
*MACA_CONTROL = (1 << PRM) | (NO_CCA << MODE);
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/* generate a random short address */
my_addr = random_short_addr();
/* sets up tx_on, should be a board specific item */
*GPIO_FUNC_SEL2 = (0x01 << ((44-16*2)*2));
*GPIO_PAD_DIR0 = *GPIO_PAD_DIR0 | (1<<(44-32));
state = SCANNING;
while(1) {
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switch(state) {
case SCANNING:
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if((p = rx_packet())) {
/* extract what we need and free the packet */
printf("Recv: ");
print_packet(p);
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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 */
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/* check if it's a session request beacon */
if(type == PACKET_SESS_REQ) {
/* try to start a session */
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sesid = open_session(p->addr);
}
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} else {
session_req(my_addr);
}
break;
default:
break;
}
}
}