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   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         if (!ao_packet_enable) {
  40                 ao_packet_enable = 1;
  41                 ao_add_task(&ao_packet_task, ao_packet_slave, "slave");
  42         }
  43 }
  44
  45 void
  46 ao_packet_slave_stop(void)
  47 {
  48         if (ao_packet_enable) {
  49                 ao_packet_enable = 0;
  50                 ao_radio_abort();
  51                 while (ao_packet_task.wchan) {
  52                         ao_wake_task(&ao_packet_task);
  53                         ao_yield();
  54                 }
  55                 ao_radio_set_telemetry();
  56         }
  57 }
  58
  59 #ifdef PACKET_HAS_SLAVE_CMD
  60 void
  61 ao_packet_slave_control(void)
  62 {
  63         ao_cmd_hex();
  64         if (ao_cmd_lex_i)
  65                 ao_packet_slave_start();
  66         else
  67                 ao_packet_slave_stop();
  68 }
  69
  70 __code struct ao_cmds ao_packet_slave_cmds[] = {
  71         { 's',  ao_packet_slave_control,        "s <enable>                         Remote packet link slave" },
  72         { 0,    ao_packet_slave_control,        NULL },
  73 };
  74 #endif
  75
  76 void
  77 ao_packet_slave_init(void)
  78 {
  79         ao_add_stdio(ao_packet_pollchar,
  80                      ao_packet_putchar,
  81                      NULL);
  82 #ifdef PACKET_HAS_SLAVE_CMD
  83         ao_cmd_register(&ao_packet_slave_cmds[0]);
  84 #endif
  85 }