main.c

   1 /*
   2  * Copyright (c) 2011, Olivier MATZ <zer0@droids-corp.org>
   3  * All rights reserved.
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  *     * Redistributions of source code must retain the above copyright
   8  *       notice, this list of conditions and the following disclaimer.
   9  *     * Redistributions in binary form must reproduce the above copyright
  10  *       notice, this list of conditions and the following disclaimer in the
  11  *       documentation and/or other materials provided with the distribution.
  12  *     * Neither the name of the University of California, Berkeley nor the
  13  *       names of its contributors may be used to endorse or promote products
  14  *       derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 /* fuses:
  29  * avrdude -p atmega1284p -P usb -c avrispmkii -U lfuse:w:0xff:m -U hfuse:w:0x99:m -U efuse:w:0xff:m
  30  */
  31
  32 #include <aversive.h>
  33 #include <aversive/queue.h>
  34 #include <aversive/endian.h>
  35 #include <aversive/wait.h>
  36 #include <aversive/error.h>
  37
  38 #include <uart.h>
  39
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <stdint.h>
  43 #include <inttypes.h>
  44 #include <stdlib.h>
  45 #include <stdarg.h>
  46 #include <errno.h>
  47 #include <ctype.h>
  48
  49 #include <scheduler.h>
  50 #include <clock_time.h>
  51 #include <parse.h>
  52 #include <rdline.h>
  53 #include <timer.h>
  54
  55 #include "eeprom_config.h"
  56 #include "beep.h"
  57 #include "main.h"
  58
  59 struct xbeeboard xbeeboard;
  60 volatile uint16_t global_ms;
  61 struct callout_manager cm;
  62
  63 #define TIMEOUT_MS 1000
  64
  65 /* global xbee device */
  66 struct xbee_dev *xbee_dev;
  67
  68 /* events */
  69 //static struct event stdin_read_event, xbee_read_event;
  70
  71 /* parameters */
  72 int xbee_raw = 0;
  73 int xbee_hexdump = 0;
  74 int xbee_debug = 0;
  75
  76 int xbee_cmdline_input_enabled = 1;
  77
  78 static struct xbee_ctx xbee_ctx[XBEE_MAX_CHANNEL];
  79
  80 static void hexdump(const char *title, const void *buf, unsigned int len)
  81 {
  82         unsigned int i, out, ofs;
  83         const unsigned char *data = buf;
  84 #define LINE_LEN 80
  85         char line[LINE_LEN];    /* space needed 8+16*3+3+16 == 75 */
  86
  87         printf_P(PSTR("%s at [%p], len=%d\r\n"), title, data, len);
  88         ofs = 0;
  89         while (ofs < len) {
  90                 /* format 1 line in the buffer, then use printk to print them */
  91                 out = snprintf_P(line, LINE_LEN, PSTR("%08X"), ofs);
  92                 for (i=0; ofs+i < len && i<16; i++)
  93                         out += snprintf_P(line+out, LINE_LEN - out,
  94                                           PSTR(" %02X"),
  95                                           data[ofs+i]&0xff);
  96                 for (;i<=16;i++)
  97                         out += snprintf(line+out, LINE_LEN - out, "   ");
  98                 for (i=0; ofs < len && i<16; i++, ofs++) {
  99                         unsigned char c = data[ofs];
 100                         if (!isascii(c) || !isprint(c))
 101                                 c = '.';
 102                         out += snprintf_P(line+out,
 103                                           LINE_LEN - out,
 104                                           PSTR("%c"), c);
 105                 }
 106                 printf_P(PSTR("%s\r\n"), line);
 107         }
 108 }
 109
 110 static int parse_xmit_status(struct xbee_ctx *ctx,
 111                              struct xbee_xmit_status_hdr *frame, unsigned len)
 112 {
 113         (void)len;
 114
 115         if (ctx == NULL) {
 116                 printf_P(PSTR("no context\r\n"));
 117                 return -1;
 118         }
 119
 120         /* see if it matches a xmit query (atcmd_query must be NULL) */
 121         if (ctx->atcmd_query[0] != '\0') {
 122                 printf_P(PSTR("invalid response 2\r\n"));
 123                 return -1;
 124         }
 125
 126         /* XXX use defines for these values */
 127         if (frame->delivery_status == 0x00)
 128                 printf_P(PSTR("Success\r\n"));
 129         else if (frame->delivery_status == 0x01)
 130                 printf_P(PSTR("MAC ACK Failure\r\n"));
 131         else if (frame->delivery_status == 0x15)
 132                 printf_P(PSTR("Invalid destination endpoint\r\n"));
 133         else if (frame->delivery_status == 0x21)
 134                 printf_P(PSTR("Network ACK Failure\r\n"));
 135         else if (frame->delivery_status == 0x25)
 136                 printf_P(PSTR("Route Not Found\r\n"));
 137
 138         return 0;
 139 }
 140
 141 static int dump_atcmd(struct xbee_ctx *ctx, struct xbee_atresp_hdr *frame,
 142                unsigned len)
 143 {
 144         char atcmd_str[3];
 145         const struct xbee_atcmd *cmd_pgm;
 146         struct xbee_atcmd cmd;
 147         union {
 148                 uint8_t u8;
 149                 uint16_t u16;
 150                 uint32_t u32;
 151                 int16_t s16;
 152         } __attribute__((packed)) *result;
 153
 154         if (ctx == NULL) {
 155                 printf_P(PSTR("no context\r\n"));
 156                 return -1;
 157         }
 158
 159         /* get AT command from frame */
 160         memcpy(atcmd_str, &frame->cmd, 2);
 161         atcmd_str[2] = '\0';
 162
 163         /* see if it matches query */
 164         if (memcmp(atcmd_str, ctx->atcmd_query, 2)) {
 165                 printf_P(PSTR("invalid response <%c%c><%s><%s>\r\n"),
 166                          frame->cmd & 0xFF,
 167                          (frame->cmd >> 8) & 0xFF,
 168                          atcmd_str, ctx->atcmd_query);
 169                 return -1;
 170         }
 171
 172         /* see if it exists */
 173         cmd_pgm = xbee_atcmd_lookup_name(atcmd_str);
 174         if (cmd_pgm == NULL) {
 175                 printf_P(PSTR("unknown response\r\n"));
 176                 return -1;
 177         }
 178         memcpy_P(&cmd, cmd_pgm, sizeof(cmd));
 179
 180         /* bad status */
 181         if (frame->status == 1) {
 182                 printf_P(PSTR("Status is error\r\n"));
 183                 return -1;
 184         }
 185         else if (frame->status == 2) {
 186                 printf_P(PSTR("Invalid command\r\n"));
 187                 return -1;
 188         }
 189         else if (frame->status == 3) {
 190                 printf_P(PSTR("Invalid parameter\r\n"));
 191                 return -1;
 192         }
 193         else if (frame->status != 0) {
 194                 printf_P(PSTR("Unknown status error %d\r\n"), frame->status);
 195                 return -1;
 196         }
 197
 198         /* callback */
 199         if (ctx->func != NULL)
 200                 ctx->func(frame, len, ctx->arg);
 201
 202         /* dump frame */
 203         result = (void *)frame->data;
 204         len -= offsetof(struct xbee_atresp_hdr, data);
 205         if (cmd.flags & XBEE_ATCMD_F_PARAM_U8 && len == sizeof(uint8_t))
 206                 printf_P(PSTR("<%s> is 0x%x\r\n"), atcmd_str, result->u8);
 207         else if (cmd.flags & XBEE_ATCMD_F_PARAM_U16 && len == sizeof(uint16_t))
 208                 printf_P(PSTR("<%s> is 0x%x\r\n"),
 209                          atcmd_str,
 210                          ntohs(result->u16));
 211         else if (cmd.flags & XBEE_ATCMD_F_PARAM_U32 && len == sizeof(uint32_t))
 212                 printf_P(PSTR("<%s> is 0x%"PRIx32"\r\n"),
 213                          atcmd_str,
 214                          ntohl(result->u32));
 215         else if (cmd.flags & XBEE_ATCMD_F_PARAM_S16 && len == sizeof(int16_t))
 216                 printf_P(PSTR("<%s> is %d\r\n"), atcmd_str, ntohs(result->s16));
 217         else if (len == 0)
 218                 printf_P(PSTR("no data, status ok\r\n"));
 219         else
 220                 hexdump("atcmd answer", frame->data, len);
 221
 222
 223         return 0;
 224 }
 225
 226
 227 int xbee_recv_data(struct xbee_recv_hdr *recvframe, unsigned len)
 228 {
 229         unsigned int datalen;
 230         struct rc_proto_hdr *rch = (struct rc_proto_hdr *) &recvframe->data;
 231
 232         if (len <  sizeof(*recvframe))
 233                 return -1;
 234
 235         datalen = len - sizeof(*recvframe);
 236         if (datalen < sizeof(struct rc_proto_hdr))
 237                 return -1;
 238
 239         switch (rch->type) {
 240                 case RC_PROTO_TYPE_CHANNEL: {
 241                         struct rc_proto_channel *rcc =
 242                                 (struct rc_proto_channel *) recvframe->data;
 243                         int16_t val;
 244                         if (datalen != sizeof(struct rc_proto_channel))
 245                                 return -1;
 246                         val = ntohs(rcc->axis[0]);
 247                         val >>= 6;
 248                         val += 512;
 249                         spi_servo_set(0, val);
 250                         break;
 251                 }
 252                 case RC_PROTO_TYPE_RANGE: {
 253                         struct rc_proto_range *rcr =
 254                                 (struct rc_proto_range *) recvframe->data;
 255
 256                         if (datalen != sizeof(struct rc_proto_range))
 257                                 return -1;
 258
 259                         if (rcr->power_level >= MAX_POWER_LEVEL)
 260                                 return -1;
 261
 262                         rc_proto_rx_range(rcr->power_level);
 263
 264                         break;
 265                 }
 266                 default:
 267                         return -1;
 268         }
 269
 270         return 0;
 271 }
 272
 273 /* socat /dev/ttyUSB0,raw,echo=0,b115200 /dev/ttyACM1,raw,echo=0,b115200 */
 274 void xbee_rx(struct xbee_dev *dev, int channel, int type,
 275              void *frame, unsigned len, void *opaque)
 276 {
 277         struct xbee_ctx *ctx = opaque;
 278         int do_hexdump = xbee_hexdump;
 279
 280         if (xbee_debug)
 281                 printf_P(PSTR("type=0x%x, channel=%d, ctx=%p\r\n"),
 282                          type, channel, ctx);
 283
 284         /* if ctx is !NULL, it is an answer to a query */
 285         if (ctx != NULL) {
 286                 /* XXX only delete timeout if answer matched */
 287                 xbee_unload_timeout(ctx);
 288                 if (xbee_debug && ctx->atcmd_query)
 289                         printf_P(PSTR("Received answer to query <%c%c>\r\n"),
 290                                  ctx->atcmd_query[0], ctx->atcmd_query[1]);
 291         }
 292
 293         /* some additional checks before sending */
 294         switch (type) {
 295                 case XBEE_TYPE_MODEM_STATUS: {
 296                         printf_P(PSTR("Received Modem Status frame\r\n"));
 297                         break;
 298                 }
 299
 300                 case XBEE_TYPE_RMT_ATRESP: {
 301                         union {
 302                                 uint64_t u64;
 303                                 struct {
 304 #if BYTE_ORDER == LITTLE_ENDIAN
 305                                         uint32_t low;
 306                                         uint32_t high;
 307 #else
 308                                         uint32_t high;
 309                                         uint32_t low;
 310 #endif
 311                                 } u32;
 312                         } addr;
 313                         memcpy(&addr, frame, sizeof(addr));
 314                         addr.u64 = ntohll(addr.u64);
 315                         printf_P(PSTR("from remote address %"PRIx32"%"PRIx32"\r\n"),
 316                                  addr.u32.high, addr.u32.low);
 317
 318                         /* this answer contains an atcmd answer at offset 10 */
 319                         if (dump_atcmd(ctx, frame + 10, len - 10) < 0)
 320                                 do_hexdump = 1;
 321                         break;
 322                 }
 323                 case XBEE_TYPE_ATRESP: {
 324                         if (dump_atcmd(ctx, frame, len) < 0)
 325                                 do_hexdump = 1;
 326                         break;
 327                 }
 328
 329                 case XBEE_TYPE_XMIT_STATUS: {
 330                         if (parse_xmit_status(ctx, frame, len) < 0)
 331                                 do_hexdump = 1;
 332                         break;
 333                 }
 334
 335                 case XBEE_TYPE_RECV: {
 336                         if (xbee_recv_data(frame, len) < 0)
 337                                 do_hexdump = 1;
 338                         break;
 339                 }
 340
 341                 case XBEE_TYPE_ATCMD:
 342                 case XBEE_TYPE_ATCMD_Q:
 343                 case XBEE_TYPE_XMIT:
 344                 case XBEE_TYPE_EXPL_XMIT:
 345                 case XBEE_TYPE_RMT_ATCMD:
 346                 case XBEE_TYPE_EXPL_RECV:
 347                 case XBEE_TYPE_NODE_ID:
 348                 default:
 349                         printf_P(PSTR("Invalid frame\r\n"));
 350                         do_hexdump = 1;
 351                         break;
 352         }
 353
 354         if (do_hexdump)
 355                 hexdump("undecoded rx frame", frame, len);
 356
 357         /* restart command line if it was a blocking query */
 358         if (ctx != NULL) {
 359                 xbee_unregister_channel(dev, channel);
 360                 if (ctx->foreground) {
 361                         xbee_stdin_enable();
 362                         rdline_newline(&xbeeboard.rdl, xbeeboard.prompt);
 363                 }
 364         }
 365 }
 366
 367 static int xbeeapp_send(struct xbee_ctx *ctx, int type, void *buf, unsigned len,
 368                         int foreground)
 369 {
 370         int ret;
 371         int channel;
 372
 373         if (len > XBEE_MAX_FRAME_LEN) {
 374                 printf_P(PSTR("frame too large\r\n"));
 375                 return -1;
 376         }
 377
 378         /* register a channel */
 379         channel = xbee_register_channel(xbee_dev, XBEE_CHANNEL_ANY,
 380                                         xbee_rx, NULL);
 381         if (channel < 0) {
 382                 printf_P(PSTR("cannot send: no free channel\r\n"));
 383                 return -1;
 384         }
 385
 386         /* copy context in the static struct table (avoiding a malloc) */
 387         memcpy(&xbee_ctx[channel], ctx, sizeof(*ctx));
 388         ctx = &xbee_ctx[channel];
 389         xbee_set_opaque(xbee_dev, channel, ctx);
 390
 391         if (xbee_debug)
 392                 printf_P(PSTR("send frame channel=%d type=0x%x len=%d\r\n"),
 393                          channel, type, len);
 394         if (xbee_hexdump)
 395                 hexdump("xmit frame", buf, len);
 396
 397         /* transmit the frame on this channel */
 398         ret = xbee_proto_xmit(xbee_dev, channel, type, buf,
 399                               len);
 400         if (ret < 0) {
 401                 printf_P(PSTR("cannot send\r\n"));
 402                 xbee_unregister_channel(xbee_dev, channel);
 403                 return -1;
 404         }
 405
 406         ctx->channel = channel;
 407         xbee_load_timeout(ctx);   /* load a timeout event */
 408
 409         /* suspend command line until we have answer or timeout */
 410         if (foreground) {
 411                 ctx->foreground = 1;
 412                 rdline_stop(&xbeeboard.rdl); /* don't display prompt when return */
 413                 xbee_stdin_disable();  /* unload file descriptor polling */
 414         }
 415
 416         return 0;
 417 }
 418
 419 /* send an AT command with parameters filled by caller. Disable
 420  * command line until we get the answer or until a timeout occurs */
 421 int xbeeapp_send_atcmd(const char *atcmd_str,
 422                        void *param, unsigned param_len, int foreground,
 423                        int (*func)(void *frame, unsigned len, void *arg), void *arg)
 424 {
 425         struct xbee_ctx ctx;
 426         struct {
 427                 struct xbee_atcmd_hdr atcmd;
 428                 char buf[XBEE_MAX_FRAME_LEN];
 429         } __attribute__((packed)) frame;
 430
 431         memset(&ctx, 0, sizeof(ctx));
 432         ctx.atcmd_query[0] = atcmd_str[0];
 433         ctx.atcmd_query[1] = atcmd_str[1];
 434         ctx.func = func;
 435         ctx.arg = arg;
 436
 437         memcpy(&frame.atcmd.cmd, atcmd_str, 2);
 438         memcpy(&frame.buf, param, param_len);
 439
 440         if (xbeeapp_send(&ctx, XBEE_TYPE_ATCMD, &frame,
 441                          sizeof(struct xbee_atcmd_hdr) +
 442                          param_len, foreground) < 0) {
 443                 return -1;
 444         }
 445
 446         return 0;
 447 }
 448
 449 int xbeeapp_send_msg(uint64_t addr, void *data,
 450                      unsigned data_len, int foreground)
 451 {
 452         struct xbee_ctx ctx;
 453         struct {
 454                 struct xbee_xmit_hdr xmit;
 455                 char buf[XBEE_MAX_FRAME_LEN];
 456         } __attribute__((packed)) frame;
 457
 458         memset(&ctx, 0, sizeof(ctx));
 459         ctx.atcmd_query[0] = '\0';
 460
 461         frame.xmit.dstaddr = htonll(addr);
 462         frame.xmit.reserved = htons(0xFFFE);
 463         frame.xmit.bcast_radius = 0;
 464         frame.xmit.opts = 0;
 465         memcpy(&frame.buf, data, data_len);
 466
 467         if (xbeeapp_send(&ctx, XBEE_TYPE_XMIT, &frame,
 468                          sizeof(struct xbee_xmit_hdr) +
 469                          data_len, foreground) < 0) {
 470                 return -1;
 471         }
 472
 473         return 0;
 474 }
 475
 476 void xbee_stdin_enable(void)
 477 {
 478         xbee_cmdline_input_enabled = 1;
 479 }
 480
 481 void xbee_stdin_disable(void)
 482 {
 483         xbee_cmdline_input_enabled = 0;
 484 }
 485
 486 static void evt_timeout(struct callout_manager *cm, struct callout *clt,
 487                         void *arg)
 488 {
 489         struct xbee_ctx *ctx = arg;
 490
 491         (void)cm;
 492         (void)clt;
 493
 494         printf_P(PSTR("Timeout\r\n"));
 495
 496         /* restart command line */
 497         xbee_stdin_enable();
 498         rdline_newline(&xbeeboard.rdl, xbeeboard.prompt);
 499
 500         /* free event */
 501         xbee_unregister_channel(xbee_dev, ctx->channel);
 502 }
 503
 504 void xbee_load_timeout(struct xbee_ctx *ctx)
 505 {
 506         callout_reset(&cm, &ctx->timeout, TIMEOUT_MS, SINGLE, evt_timeout, ctx);
 507 }
 508
 509 void xbee_unload_timeout(struct xbee_ctx *ctx)
 510 {
 511         callout_stop(&cm, &ctx->timeout);
 512 }
 513
 514 void bootloader(void)
 515 {
 516 #define BOOTLOADER_ADDR 0x3f000
 517         if (pgm_read_byte_far(BOOTLOADER_ADDR) == 0xff) {
 518                 printf_P(PSTR("Bootloader is not present\r\n"));
 519                 return;
 520         }
 521         cli();
 522         /* ... very specific :( */
 523         TIMSK0 = 0;
 524         TIMSK1 = 0;
 525         TIMSK2 = 0;
 526         TIMSK3 = 0;
 527         EIMSK = 0;
 528         UCSR0B = 0;
 529         UCSR1B = 0;
 530         SPCR = 0;
 531         TWCR = 0;
 532         ACSR = 0;
 533         ADCSRA = 0;
 534
 535         /* XXX */
 536         /* __asm__ __volatile__ ("ldi r31,0xf8\n"); */
 537         /* __asm__ __volatile__ ("ldi r30,0x00\n"); */
 538         /* __asm__ __volatile__ ("eijmp\n"); */
 539 }
 540
 541 void xbee_mainloop(void)
 542 {
 543         while (1) {
 544                 callout_manage(&cm);
 545
 546                 if (xbee_raw) {
 547                         int16_t c;
 548
 549                         /* from xbee to cmdline */
 550                         c = xbee_dev_recv(NULL);
 551                         if (c >= 0)
 552                                 cmdline_dev_send((uint8_t)c, NULL);
 553
 554                         /* from cmdline to xbee */
 555                         c = cmdline_dev_recv(NULL);
 556                         if (c == 4) { /* CTRL-d */
 557                                 xbee_dev_send('A', NULL);
 558                                 xbee_dev_send('T', NULL);
 559                                 xbee_dev_send('C', NULL);
 560                                 xbee_dev_send('N', NULL);
 561                                 xbee_dev_send('\n', NULL);
 562                                 xbee_raw = 0;
 563                                 rdline_newline(&xbeeboard.rdl,
 564                                                xbeeboard.prompt);
 565                         }
 566                         else if (c >= 0) {
 567                                 /* send to xbee */
 568                                 xbee_dev_send((uint8_t)c, NULL);
 569
 570                                 /* echo on cmdline */
 571                                 cmdline_dev_send((uint8_t)c, NULL);
 572                         }
 573                 }
 574                 else {
 575                         if (xbee_cmdline_input_enabled)
 576                                 cmdline_poll();
 577                         xbee_proto_rx(xbee_dev);
 578                 }
 579         }
 580 }
 581
 582 /* return time in milliseconds on unsigned 16 bits */
 583 static uint16_t get_time_ms(void)
 584 {
 585         return global_ms;
 586 }
 587
 588 static void main_timer_interrupt(void)
 589 {
 590         static uint16_t cycles;
 591         static uint8_t cpt;
 592
 593         cpt++;
 594
 595         /* interrupt every 2048 cycles */
 596         cycles += 2048;
 597         if (cycles >= 12000) {
 598                 cycles -= 12000;
 599                 global_ms ++;
 600         }
 601
 602         /* LED blink */
 603         if (global_ms & 0x80)
 604                 LED1_ON();
 605         else
 606                 LED1_OFF();
 607
 608         if (cpt & beep_mask)
 609                 BUZZER_ON();
 610         else
 611                 BUZZER_OFF();
 612
 613         /* call scheduler every 682us with interrupt unlocked */
 614         sei();
 615         if ((cpt & 0x3) == 0)
 616                 scheduler_interrupt();
 617 }
 618
 619 int main(void)
 620 {
 621         //struct callout t1;
 622         FILE *xbee_file;
 623         int8_t err;
 624         struct xbee_dev dev;
 625
 626         DDRA = 0x07 /* LEDs */ | 0x10 /* buzzer */;
 627
 628         uart_init();
 629         uart_register_rx_event(CMDLINE_UART, emergency);
 630
 631         fdevopen(cmdline_dev_send, cmdline_dev_recv);
 632         xbee_file = fdevopen(xbee_dev_send, xbee_dev_recv);
 633         scheduler_init();
 634         timer_init();
 635         timer0_register_OV_intr(main_timer_interrupt);
 636
 637         cmdline_init();
 638         spi_servo_init();
 639         beep_init();
 640
 641         printf_P(PSTR("\r\n"));
 642         rdline_newline(&xbeeboard.rdl, xbeeboard.prompt);
 643
 644         callout_manager_init(&cm, get_time_ms);
 645         //callout_reset(&cm, &t1, 500, PERIODICAL, do_led_blink, NULL);
 646
 647         /* initialize libxbee */
 648         err = xbee_init();
 649         if (err < 0)
 650                 return -1;
 651
 652         xbee_dev = &dev;
 653
 654         /* open xbee device */
 655         if (xbee_open(xbee_dev, xbee_file) < 0)
 656                 return -1;
 657
 658         /* register default channel with a callback */
 659         if (xbee_register_channel(xbee_dev, XBEE_DEFAULT_CHANNEL,
 660                                   xbee_rx, NULL) < 0) {
 661                 fprintf(stderr, "cannot register default channel\n");
 662                 return -1;
 663         }
 664         sei();
 665
 666         eeprom_load_config();
 667         xbee_mainloop();
 668         return 0;
 669 }