git.gag.com Git - fw/altos/blob - src/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         uint8_t status;
  24
  25         ao_radio_set_packet();
  26         ao_tx_packet.addr = ao_serial_number;
  27         ao_tx_packet.len = AO_PACKET_SYN;
  28         while (ao_packet_enable) {
  29                 status = ao_packet_recv();
  30                 if (status & AO_DMA_DONE)
  31                         ao_packet_send();
  32         }
  33         ao_exit();
  34 }
  35
  36 void
  37 ao_packet_slave_start(void)
  38 {
  39         ao_packet_enable = 1;
  40         ao_add_task(&ao_packet_task, ao_packet_slave, "slave");
  41 }
  42
  43 void
  44 ao_packet_slave_stop(void)
  45 {
  46         if (ao_packet_enable) {
  47                 ao_packet_enable = 0;
  48                 ao_radio_abort();
  49                 while (ao_packet_task.wchan) {
  50                         ao_wake_task(&ao_packet_task);
  51                         ao_yield();
  52                 }
  53                 ao_radio_set_telemetry();
  54         }
  55 }
  56
  57 void
  58 ao_packet_slave_init(void)
  59 {
  60         ao_add_stdio(ao_packet_pollchar,
  61                      ao_packet_putchar,
  62                      NULL);
  63 }