git.gag.com Git - fw/altos/blob - src/drivers/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; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 #include "ao.h"
  20
  21 static void
  22 ao_packet_slave(void)
  23 {
  24         ao_tx_packet.addr = ao_serial_number;
  25         ao_tx_packet.len = AO_PACKET_SYN;
  26         ao_packet_restart = 1;
  27         while (ao_packet_enable) {
  28                 if (ao_packet_recv(0)) {
  29                         memcpy(&ao_tx_packet.callsign, &ao_rx_packet.packet.callsign, AO_MAX_CALLSIGN);
  30 #if HAS_FLIGHT
  31                         ao_flight_force_idle = true;
  32 #endif
  33                         ao_packet_send();
  34                 }
  35         }
  36         ao_exit();
  37 }
  38
  39 void
  40 ao_packet_slave_start(void)
  41 {
  42         if (!ao_packet_enable) {
  43                 ao_packet_enable = 1;
  44                 ao_add_task(&ao_packet_task, ao_packet_slave, "slave");
  45         }
  46 }
  47
  48 void
  49 ao_packet_slave_stop(void)
  50 {
  51         if (ao_packet_enable) {
  52                 ao_packet_enable = 0;
  53                 while (ao_packet_task.wchan) {
  54                         ao_radio_recv_abort();
  55                         ao_delay(AO_MS_TO_TICKS(10));
  56                 }
  57         }
  58 }
  59
  60 void
  61 ao_packet_slave_init(uint8_t enable)
  62 {
  63         ao_add_stdio(_ao_packet_pollchar,
  64                      ao_packet_putchar,
  65                      NULL);
  66         if (enable)
  67                 ao_packet_slave_start();
  68 }