+/*
+ * Copyright © 2011 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.
+ */
+
+/*
+ * ao_log_single.c
+ *
+ * Stores a sequence of fixed-size (32 byte) chunks
+ * without splitting memory up into separate flights
+ */
+
+#include "ao.h"
+#include "ao_product.h"
+
+static __xdata struct ao_task ao_log_single_task;
+
+__xdata uint8_t ao_log_running;
+__xdata uint8_t ao_log_mutex;
+__pdata uint32_t ao_log_start_pos;
+__pdata uint32_t ao_log_end_pos;
+__pdata uint32_t ao_log_current_pos;
+
+__xdata union ao_log_single ao_log_single_write_data;
+__xdata union ao_log_single ao_log_single_read_data;
+
+uint8_t
+ao_log_single_write(void)
+{
+ uint8_t wrote = 0;
+
+ ao_mutex_get(&ao_log_mutex); {
+ if (ao_log_current_pos >= ao_log_end_pos && ao_log_running)
+ ao_log_single_stop();
+ if (ao_log_running) {
+ wrote = 1;
+ ao_storage_write(ao_log_current_pos,
+ &ao_log_single_write_data,
+ AO_LOG_SINGLE_SIZE);
+ ao_log_current_pos += AO_LOG_SINGLE_SIZE;
+ }
+ } ao_mutex_put(&ao_log_mutex);
+ return wrote;
+}
+
+static uint8_t
+ao_log_single_valid(void)
+{
+ __xdata uint8_t *d = ao_log_single_read_data.bytes;
+ uint8_t i;
+ for (i = 0; i < AO_LOG_SINGLE_SIZE; i++)
+ if (*d++ != 0xff)
+ return 1;
+ return 0;
+}
+
+uint8_t
+ao_log_single_read(uint32_t pos)
+{
+ if (!ao_storage_read(pos, &ao_log_single_read_data, AO_LOG_SINGLE_SIZE))
+ return 0;
+ return ao_log_single_valid();
+}
+
+void
+ao_log_single_start(void)
+{
+ if (!ao_log_running) {
+ ao_log_running = 1;
+ ao_wakeup(&ao_log_running);
+ }
+}
+
+void
+ao_log_single_stop(void)
+{
+ if (ao_log_running) {
+ ao_log_running = 0;
+ }
+}
+
+void
+ao_log_single_restart(void)
+{
+ /* Find end of data */
+ ao_log_end_pos = ao_storage_config;
+ for (ao_log_current_pos = 0;
+ ao_log_current_pos < ao_storage_config;
+ ao_log_current_pos += ao_storage_block)
+ {
+ if (!ao_log_single_read(ao_log_current_pos))
+ break;
+ }
+ if (ao_log_current_pos > 0) {
+ ao_log_current_pos -= ao_storage_block;
+ for (; ao_log_current_pos < ao_storage_config;
+ ao_log_current_pos += sizeof (struct ao_log_telescience))
+ {
+ if (!ao_log_single_read(ao_log_current_pos))
+ break;
+ }
+ }
+}
+
+void
+ao_log_single_set(void)
+{
+ printf("Logging currently %s\n", ao_log_running ? "on" : "off");
+ ao_cmd_hex();
+ if (ao_cmd_status == ao_cmd_success) {
+ if (ao_cmd_lex_i) {
+ printf("Logging from %ld to %ld\n", ao_log_current_pos, ao_log_end_pos);
+ ao_log_single_start();
+ } else {
+ printf ("Log stopped at %ld\n", ao_log_current_pos);
+ ao_log_single_stop();
+ }
+ }
+ ao_cmd_status = ao_cmd_success;
+}
+
+void
+ao_log_single_delete(void)
+{
+ uint32_t pos;
+
+ ao_cmd_hex();
+ if (ao_cmd_status != ao_cmd_success)
+ return;
+ if (ao_cmd_lex_i != 1) {
+ ao_cmd_status = ao_cmd_syntax_error;
+ printf("No such flight: %d\n", ao_cmd_lex_i);
+ return;
+ }
+ ao_log_single_stop();
+ for (pos = 0; pos < ao_storage_config; pos += ao_storage_block) {
+ if (!ao_log_single_read(pos))
+ break;
+ ao_storage_erase(pos);
+ }
+ ao_log_current_pos = ao_log_start_pos = 0;
+ if (pos == 0)
+ printf("No such flight: %d\n", ao_cmd_lex_i);
+ else
+ printf ("Erased\n");
+}
+
+uint8_t
+ao_log_full(void)
+{
+ return ao_log_current_pos >= ao_log_end_pos;
+}
+
+uint8_t
+ao_log_present(void)
+{
+ return ao_log_single_read(0);
+}
+
+static void
+ao_log_single_query(void)
+{
+ printf("Logging enabled: %d\n", ao_log_running);
+ printf("Log start: %ld\n", ao_log_start_pos);
+ printf("Log cur: %ld\n", ao_log_current_pos);
+ printf("Log end: %ld\n", ao_log_end_pos);
+ ao_log_single_extra_query();
+}
+
+const struct ao_cmds ao_log_single_cmds[] = {
+ { ao_log_single_set, "L <0 off, 1 on>\0Set logging" },
+ { ao_log_single_list, "l\0List stored logs" },
+ { ao_log_single_delete, "d 1\0Delete all stored logs" },
+ { ao_log_single_query, "q\0Query log status" },
+ { 0, NULL },
+};
+
+void
+ao_log_single_init(void)
+{
+ ao_log_running = 0;
+
+ ao_cmd_register(&ao_log_single_cmds[0]);
+
+ ao_add_task(&ao_log_single_task, ao_log_single, "log");
+}