git.gag.com Git - fw/altos/blob - src-avr/ao_packet_slave.c

   1 /*
   2  * Copyright © 2009 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include "ao.h"
  19
  20 void
  21 ao_packet_slave(void)
  22 {
  23         ao_tx_packet.addr = ao_serial_number;
  24         ao_tx_packet.len = AO_PACKET_SYN;
  25         while (ao_packet_enable) {
  26                 if (ao_packet_recv()) {
  27                         memcpy(&ao_tx_packet.callsign, &ao_rx_packet.packet.callsign, AO_MAX_CALLSIGN);
  28 #if HAS_FLIGHT
  29                         ao_flight_force_idle = TRUE;
  30 #endif
  31                         ao_packet_send();
  32                 }
  33         }
  34         ao_exit();
  35 }
  36
  37 void
  38 ao_packet_slave_start(void)
  39 {
  40         ao_packet_enable = 1;
  41         ao_add_task(&ao_packet_task, ao_packet_slave, "slave");
  42 }
  43
  44 void
  45 ao_packet_slave_stop(void)
  46 {
  47         if (ao_packet_enable) {
  48                 ao_packet_enable = 0;
  49                 while (ao_packet_task.wchan) {
  50                         ao_radio_recv_abort();
  51                         ao_delay(AO_MS_TO_TICKS(10));
  52                 }
  53         }
  54 }
  55
  56 void
  57 ao_packet_slave_init(uint8_t enable)
  58 {
  59         ao_add_stdio(ao_packet_pollchar,
  60                      ao_packet_putchar,
  61                      NULL);
  62         if (enable)
  63                 ao_packet_slave_start();
  64 }