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)
25 /* No need to block interrupts in this function as
26 * all packet variables are only modified from task
27 * context, not an interrupt handler
29 while ((c = _ao_packet_pollchar()) == AO_READ_AGAIN) {
30 if (!ao_packet_enable)
32 if (ao_packet_master_sleeping)
33 ao_wakeup(&ao_packet_master_sleeping);
35 ao_sleep(&ao_stdin_ready);
41 ao_packet_echo(void) __reentrant
44 while (ao_packet_enable) {
45 c = ao_packet_getchar();
46 if (c != AO_READ_AGAIN)
52 static __xdata struct ao_task ao_packet_echo_task;
53 static __xdata uint16_t ao_packet_master_delay;
54 static __xdata uint16_t ao_packet_master_time;
56 #define AO_PACKET_MASTER_DELAY_SHORT AO_MS_TO_TICKS(100)
57 #define AO_PACKET_MASTER_DELAY_LONG AO_MS_TO_TICKS(1000)
58 #define AO_PACKET_MASTER_DELAY_TIMEOUT AO_MS_TO_TICKS(2000)
61 ao_packet_master_busy(void)
63 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
64 ao_packet_master_time = ao_time();
68 ao_packet_master_check_busy(void)
71 if (ao_packet_master_delay != AO_PACKET_MASTER_DELAY_SHORT)
73 idle = (int16_t) (ao_time() - ao_packet_master_time);
75 if (idle > AO_PACKET_MASTER_DELAY_TIMEOUT)
76 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_LONG;
80 ao_packet_master(void)
83 ao_tx_packet.addr = ao_serial_number;
84 ao_tx_packet.len = AO_PACKET_SYN;
85 ao_packet_master_time = ao_time();
86 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
87 while (ao_packet_enable) {
89 ao_xmemcpy(ao_tx_packet.callsign, ao_config.callsign, AO_MAX_CALLSIGN);
92 ao_packet_master_busy();
93 ao_packet_master_check_busy();
94 ao_alarm(ao_packet_master_delay);
98 /* if we can transmit data, do so */
99 if (ao_packet_tx_used && ao_tx_packet.len == 0)
101 if (ao_rx_packet.packet.len)
102 ao_packet_master_busy();
103 ao_packet_master_sleeping = 1;
104 ao_alarm(ao_packet_master_delay);
105 ao_sleep(&ao_packet_master_sleeping);
107 ao_packet_master_sleeping = 0;
114 ao_packet_forward(void) __reentrant
117 ao_packet_enable = 1;
122 ao_monitor_disable();
124 ao_add_task(&ao_packet_task, ao_packet_master, "master");
125 ao_add_task(&ao_packet_echo_task, ao_packet_echo, "echo");
126 while ((c = getchar()) != '~') {
127 if (c == '\r') c = '\n';
128 ao_packet_putchar(c);
131 /* Wait for a second if there is any pending data */
132 for (c = 0; (ao_packet_tx_used || ao_tx_packet.len) && c < 10; c++)
133 ao_delay(AO_MS_TO_TICKS(100));
134 ao_packet_enable = 0;
135 while (ao_packet_echo_task.wchan || ao_packet_task.wchan) {
136 ao_radio_recv_abort();
137 ao_wakeup(&ao_stdin_ready);
138 ao_delay(AO_MS_TO_TICKS(10));
146 ao_packet_signal(void)
148 printf ("RSSI: %d\n", ao_radio_rssi);
151 __code struct ao_cmds ao_packet_master_cmds[] = {
152 { ao_packet_forward, "p\0Remote packet link." },
153 { ao_packet_signal, "s\0Report signal strength." },
158 ao_packet_master_init(void)
160 ao_cmd_register(&ao_packet_master_cmds[0]);