File content as of revision 0:ea8459db49ef:

/*
Copyright (c) 2011, Senio Networks, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#include "XBee.h"
#include "macros.h"
#include <stdarg.h>

void XBee::sendCommand(char *command, char *param, int param_length, bool queue) {
    char buf[param_length + 4];

    createAtRequest(frame_id, command, param, param_length, queue, buf, sizeof(buf));
    sendFrame(buf, param_length + 4);
    frame_id = frame_id % 255 + 1;
}

void XBee::sendRemoteCommand(char *command, char *param, int param_length, char options) {
    char buf[param_length + 15];

    createRemoteAtRequest(frame_id, command, param, param_length, options, buf, sizeof(buf));
    sendFrame(buf, param_length + 15);
    frame_id = frame_id % 255 + 1;
}

void XBee::send(char *data, int length) {
    char buf[length + 14];

    createTxRequest(frame_id, data, length, buf, sizeof(buf));
    sendFrame(buf, length + 14);
    frame_id = frame_id % 255 + 1;
}

bool XBee::sendConfirm(char *data, int length) {
    send(data, length);

    int index = seekFor(ZigBeeTransmitStatus, 3.0);
    if (index != -1) {
        char delivery;
        scan(index, DeliveryStatus, &delivery);
        buf[INDEX(index + 2)] = 0x00;
        return delivery == 0;
    }
    return false;
}

int XBee::printf(const char *format, ...) {
    va_list argv;
    va_start(argv, format);
    char buf[256];
    int length = vsnprintf(buf, sizeof buf, format, argv);
    return length > 0 && sendConfirm(buf, length) ? length : -1;
}

void XBee::send(char c) {
    while (!writeable()) wait_us(100);
    putc(c);
}

void XBee::send2(char c) {
    switch (c) {
        case 0x7E:
        case 0x7D:
        case 0x11:
        case 0x13:
            send(ESCAPE);
            send(c ^ 0x20);
            break;
        default:
            send(c);
    }
}

void XBee::sendFrame(char* frame, int length) {
    char checksum = 255;
    if (debug) leds = leds | 8; //**LEDS=1xxx

    send(PREAMBLE);

    if (apiMode == 2) {
        send2((length >> 8) & 255);
        send2(length & 255);
        for (int i = 0; i < length; i++) {
            send2(frame[i]);
            checksum -= frame[i];
        }
        send2(checksum);
    } else {
        send((length >> 8) & 255);
        send(length & 255);
        for (int i = 0; i < length; i++) {
            send(frame[i]);
            checksum -= frame[i];
        }
        send(checksum);
    }
    if (debug) leds = leds & 7; //**LEDS=0xxx
}

int XBee::createTxRequest(char frame_id, char* data, int data_length, char* buf, int buf_size) {
    if (data_length + 14 > buf_size) return -1;

    buf[0] = 0x10; // frame type
    buf[1] = frame_id;
    for (int i = 0; i < 8; i++) buf[i + 2] = destination64[i];
    buf[10] = destination16[0]; // 16 bit dest address
    buf[11] = destination16[1]; // 16 bit dest address
    buf[12] = 0;
    buf[13] = 0;
    for (int i = 0; i < data_length; i++) buf[i + 14] = data[i];

    return data_length + 14;
}

int XBee::createAtRequest(char frame_id, char* command, char* param, int param_length, bool queue, char* buf, int buf_size) {
    if (param_length + 4 > buf_size) return -1;

    buf[0] = queue ? 0x09 : 0x08; // frame type
    buf[1] = frame_id;
    buf[2] = command[0];
    buf[3] = command[1];
    for (int i = 0; i < param_length; i++) buf[i + 4] = param[i];

    return param_length + 4;
}

int XBee::createRemoteAtRequest(char frame_id, char* command, char* param, int param_length, char options, char* buf, int buf_size) {
    if (param_length + 4 > buf_size) return -1;

    buf[0] = 0x17; // frame type
    buf[1] = frame_id;
    memcpy(buf + 2, destination64, 8);
    buf[10] = destination16[0];
    buf[11] = destination16[1];
    buf[12] = options;
    buf[13] = command[0];
    buf[14] = command[1];
    for (int i = 0; i < param_length; i++) buf[i + 15] = param[i];

    return param_length + 15;
}