2 * Copyright © 2009 Keith Packard <keithp@keithp.com>
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.
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.
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.
21 ao_packet_getchar(void) __critical
24 while ((c = ao_packet_pollchar()) == AO_READ_AGAIN) {
25 if (!ao_packet_enable)
27 if (ao_packet_master_sleeping)
28 ao_wakeup(&ao_packet_master_sleeping);
30 ao_sleep(&ao_stdin_ready);
36 ao_packet_echo(void) __reentrant
39 while (ao_packet_enable) {
40 c = ao_packet_getchar();
41 if (c != AO_READ_AGAIN)
47 static __xdata struct ao_task ao_packet_echo_task;
48 static __xdata uint16_t ao_packet_master_delay;
49 static __xdata uint16_t ao_packet_master_time;
51 #define AO_PACKET_MASTER_DELAY_SHORT AO_MS_TO_TICKS(100)
52 #define AO_PACKET_MASTER_DELAY_LONG AO_MS_TO_TICKS(1000)
53 #define AO_PACKET_MASTER_DELAY_TIMEOUT AO_MS_TO_TICKS(2000)
56 ao_packet_master_busy(void)
58 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
59 ao_packet_master_time = ao_time();
63 ao_packet_master_check_busy(void)
66 if (ao_packet_master_delay != AO_PACKET_MASTER_DELAY_SHORT)
68 idle = (int16_t) (ao_time() - ao_packet_master_time);
70 if (idle > AO_PACKET_MASTER_DELAY_TIMEOUT)
71 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_LONG;
75 ao_packet_master(void)
78 ao_tx_packet.addr = ao_serial_number;
79 ao_tx_packet.len = AO_PACKET_SYN;
80 ao_packet_master_time = ao_time();
81 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
82 while (ao_packet_enable) {
83 memcpy(ao_tx_packet.callsign, ao_config.callsign, AO_MAX_CALLSIGN);
86 ao_packet_master_busy();
87 ao_packet_master_check_busy();
88 ao_alarm(ao_packet_master_delay);
89 if (ao_packet_recv()) {
90 /* if we can transmit data, do so */
91 if (ao_packet_tx_used && ao_tx_packet.len == 0)
93 if (ao_rx_packet.packet.len)
94 ao_packet_master_busy();
95 ao_packet_master_sleeping = 1;
96 ao_alarm(ao_packet_master_delay);
97 ao_sleep(&ao_packet_master_sleeping);
98 ao_packet_master_sleeping = 0;
105 ao_packet_forward(void) __reentrant
108 ao_packet_enable = 1;
115 ao_add_task(&ao_packet_task, ao_packet_master, "master");
116 ao_add_task(&ao_packet_echo_task, ao_packet_echo, "echo");
117 while ((c = getchar()) != '~') {
118 if (c == '\r') c = '\n';
119 ao_packet_putchar(c);
122 /* Wait for a second if there is any pending data */
123 for (c = 0; (ao_packet_tx_used || ao_tx_packet.len) && c < 10; c++)
124 ao_delay(AO_MS_TO_TICKS(100));
125 ao_packet_enable = 0;
126 while (ao_packet_echo_task.wchan || ao_packet_task.wchan) {
127 ao_radio_recv_abort();
128 ao_wakeup(&ao_stdin_ready);
129 ao_delay(AO_MS_TO_TICKS(10));
135 __code struct ao_cmds ao_packet_master_cmds[] = {
136 { ao_packet_forward, "p\0Remote packet link." },
141 ao_packet_master_init(void)
143 ao_cmd_register(&ao_packet_master_cmds[0]);