+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+static char
+ao_packet_getchar(void)
+{
+ char c;
+ while ((c = ao_packet_pollchar()) == AO_READ_AGAIN)
+ {
+ if (!ao_packet_enable)
+ break;
+ if (ao_packet_master_sleeping)
+ ao_wake_task(&ao_packet_task);
+ ao_sleep(&ao_stdin_ready);
+ }
+ return c;
+}
+
+static void
+ao_packet_echo(void) __reentrant
+{
+ uint8_t c;
+ while (ao_packet_enable) {
+ c = ao_packet_getchar();
+ if (ao_packet_enable)
+ putchar(c);
+ }
+ ao_exit();
+}
+
+static __xdata struct ao_task ao_packet_echo_task;
+static __xdata uint16_t ao_packet_master_delay;
+static __xdata uint16_t ao_packet_master_time;
+
+#define AO_PACKET_MASTER_DELAY_SHORT AO_MS_TO_TICKS(100)
+#define AO_PACKET_MASTER_DELAY_LONG AO_MS_TO_TICKS(1000)
+#define AO_PACKET_MASTER_DELAY_TIMEOUT AO_MS_TO_TICKS(2000)
+
+static void
+ao_packet_master_busy(void)
+{
+ ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
+ ao_packet_master_time = ao_time();
+}
+
+static void
+ao_packet_master_check_busy(void)
+{
+ int16_t idle;
+ if (ao_packet_master_delay != AO_PACKET_MASTER_DELAY_SHORT)
+ return;
+ idle = (int16_t) (ao_time() - ao_packet_master_time);
+
+ if (idle > AO_PACKET_MASTER_DELAY_TIMEOUT)
+ ao_packet_master_delay = AO_PACKET_MASTER_DELAY_LONG;
+}
+
+void
+ao_packet_master(void)
+{
+ uint8_t status;
+
+ ao_radio_set_packet();
+ ao_tx_packet.addr = ao_serial_number;
+ ao_tx_packet.len = AO_PACKET_SYN;
+ ao_packet_master_time = ao_time();
+ ao_packet_master_delay = AO_PACKET_MASTER_DELAY_SHORT;
+ while (ao_packet_enable) {
+ ao_packet_send();
+ if (ao_tx_packet.len)
+ ao_packet_master_busy();
+ ao_packet_master_check_busy();
+ ao_alarm(ao_packet_master_delay);
+ status = ao_packet_recv();
+ if (status & AO_DMA_DONE) {
+ /* if we can transmit data, do so */
+ if (ao_packet_tx_used && ao_tx_packet.len == 0)
+ continue;
+ if (ao_rx_packet.packet.len)
+ ao_packet_master_busy();
+ else
+ flush();
+ ao_packet_master_sleeping = 1;
+ ao_delay(ao_packet_master_delay);
+ ao_packet_master_sleeping = 0;
+ }
+ }
+ ao_exit();
+}
+
+static void
+ao_packet_forward(void) __reentrant
+{
+ char c;
+ ao_packet_enable = 1;
+ ao_cmd_white();
+
+ flush();
+ ao_set_monitor(0);
+ ao_add_task(&ao_packet_task, ao_packet_master, "master");
+ ao_add_task(&ao_packet_echo_task, ao_packet_echo, "echo");
+ while ((c = getchar()) != '~') {
+ if (c == '\r') c = '\n';
+ ao_packet_putchar(c);
+ }
+ ao_packet_enable = 0;
+ ao_radio_abort();
+ while (ao_packet_echo_task.wchan || ao_packet_task.wchan) {
+ ao_wake_task(&ao_packet_echo_task);
+ ao_wake_task(&ao_packet_task);
+ ao_yield();
+ }
+}
+
+
+
+__code struct ao_cmds ao_packet_master_cmds[] = {
+ { 'p', ao_packet_forward, "p Remote packet link." },
+ { 0, ao_packet_forward, NULL },
+};
+
+void
+ao_packet_master_init(void)
+{
+ ao_cmd_register(&ao_packet_master_cmds[0]);
+}
projects / fw / altos / commitdiff