per.c

/*
 * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
 * to the MC1322x project (http://mc1322x.devl.org)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of libmc1322x: see http://mc1322x.devl.org
 * for details. 
 *
 *
 */

#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  */

/* how long to wait between session requests */
#define SESSION_REQ_TIMEOUT 10000     /* 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 __attribute__((unused))) {
        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(uint16_t)*8))

void build_session_req(volatile packet_t *p) {
        static uint8_t count = 0;
        p->length = 4; p->offset = 0;
        p->data[0] = 0xff;
        p->data[1] = 0x01;
        p->data[2] = 0x02;
        p->data[3] = count++;
        return;
}

void session_req(uint16_t addr __attribute__((unused))) {       
        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);
                }
        }
        return; 
}

session_id_t open_session(uint16_t addr __attribute((unused))) { return 0; }

void main(void) {
        uint32_t state;
        volatile packet_t *p;
        session_id_t sesid;
        ptype_t type;
        uint16_t addr, my_addr;

        /* trim the reference osc. to 24MHz */
        pack_XTAL_CNTL(CTUNE_4PF, CTUNE, FTUNE, IBIAS);
        
        uart_init(INC, MOD, SAMP);

        vreg_init();

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

        /* 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_dir_set( 1ULL << 44 );

        print_welcome("Packet error test");

        state = SCANNING;
        while(1) { 
                
                switch(state) {
                case SCANNING:
                        if((p = rx_packet())) {
                                /* extract what we need and free the packet */
                                printf("Recv: ");
                                print_packet(p);
                                type = get_packet_type((packet_t *) p);
                                addr = 0; /* FIXME */
                                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(addr);
                                }
                        }  else {
                                session_req(my_addr);
                        }
                        break;
                default:
                        break;
                }
                                        

        }

}