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)
26 if (!ao_packet_enable)
28 if (ao_packet_master_sleeping)
29 ao_wake_task(&ao_packet_task);
31 ao_sleep(&ao_stdin_ready);
37 ao_packet_echo(void) __reentrant
40 while (ao_packet_enable) {
41 c = ao_packet_getchar();
48 static __xdata struct ao_task ao_packet_echo_task;
49 static __xdata uint16_t ao_packet_master_delay;
50 static __xdata uint16_t ao_packet_master_time;
52 #define AO_PACKET_MASTER_DELAY_SHORT AO_MS_TO_TICKS(100)
53 #define AO_PACKET_MASTER_DELAY_LONG AO_MS_TO_TICKS(1000)
54 #define AO_PACKET_MASTER_DELAY_TIMEOUT AO_MS_TO_TICKS(2000)
57 ao_packet_master_busy(void)
59 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
60 ao_packet_master_time = ao_time();
64 ao_packet_master_check_busy(void)
67 if (ao_packet_master_delay != AO_PACKET_MASTER_DELAY_SHORT)
69 idle = (int16_t) (ao_time() - ao_packet_master_time);
71 if (idle > AO_PACKET_MASTER_DELAY_TIMEOUT)
72 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_LONG;
76 ao_packet_master(void)
81 ao_radio_set_packet();
82 ao_tx_packet.addr = ao_serial_number;
83 ao_tx_packet.len = AO_PACKET_SYN;
84 ao_packet_master_time = ao_time();
85 ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
86 while (ao_packet_enable) {
87 memcpy(ao_tx_packet.callsign, ao_config.callsign, AO_MAX_CALLSIGN);
90 ao_packet_master_busy();
91 ao_packet_master_check_busy();
92 ao_alarm(ao_packet_master_delay);
93 status = ao_packet_recv();
94 if (status & AO_DMA_DONE) {
95 /* if we can transmit data, do so */
96 if (ao_packet_tx_used && ao_tx_packet.len == 0)
98 if (ao_rx_packet.packet.len)
99 ao_packet_master_busy();
100 ao_packet_master_sleeping = 1;
101 ao_delay(ao_packet_master_delay);
102 ao_packet_master_sleeping = 0;
105 ao_radio_set_telemetry();
110 ao_packet_forward(void) __reentrant
113 ao_packet_enable = 1;
118 ao_add_task(&ao_packet_task, ao_packet_master, "master");
119 ao_add_task(&ao_packet_echo_task, ao_packet_echo, "echo");
120 while ((c = ao_usb_getchar()) != '~') {
121 if (c == '\r') c = '\n';
122 ao_packet_putchar(c);
124 ao_packet_enable = 0;
126 while (ao_packet_echo_task.wchan || ao_packet_task.wchan) {
127 ao_wake_task(&ao_packet_echo_task);
128 ao_wake_task(&ao_packet_task);
135 __code struct ao_cmds ao_packet_master_cmds[] = {
136 { 'p', ao_packet_forward, "p Remote packet link." },
137 { 0, ao_packet_forward, NULL },
141 ao_packet_master_init(void)
143 ao_cmd_register(&ao_packet_master_cmds[0]);