--- /dev/null
+/*
+ * 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"
+#include <ao_log.h>
+#include <ao_config.h>
+
+__pdata uint32_t ao_log_current_pos;
+__pdata uint32_t ao_log_end_pos;
+__pdata uint32_t ao_log_start_pos;
+__xdata uint8_t ao_log_running;
+__pdata enum ao_flight_state ao_log_state;
+__xdata uint16_t ao_flight_number;
+
+void
+ao_log_flush(void)
+{
+ ao_storage_flush();
+}
+
+/*
+ * When erasing a flight log, make sure the config block
+ * has an up-to-date version of the current flight number
+ */
+
+struct ao_log_erase {
+ uint8_t unused;
+ uint16_t flight;
+};
+
+static __xdata struct ao_log_erase erase;
+
+#define LOG_MAX_ERASE 16
+
+static uint32_t
+ao_log_erase_pos(uint8_t i)
+{
+ return i * sizeof (struct ao_log_erase) + AO_CONFIG_MAX_SIZE;
+}
+
+void
+ao_log_write_erase(uint8_t pos)
+{
+ erase.unused = 0x00;
+ erase.flight = ao_flight_number;
+ ao_config_write(ao_log_erase_pos(pos), &erase, sizeof (erase));
+ ao_config_flush();
+}
+
+static void
+ao_log_read_erase(uint8_t pos)
+{
+ ao_config_read(ao_log_erase_pos(pos), &erase, sizeof (erase));
+}
+
+
+static void
+ao_log_erase_mark(void)
+{
+ uint8_t i;
+
+ for (i = 0; i < LOG_MAX_ERASE; i++) {
+ ao_log_read_erase(i);
+ if (erase.unused == 0 && erase.flight == ao_flight_number)
+ return;
+ if (erase.unused == 0xff) {
+ ao_log_write_erase(i);
+ return;
+ }
+ }
+ ao_config_put();
+}
+
+static uint8_t
+ao_log_slots()
+{
+ return (uint8_t) (ao_storage_log_max / ao_config.flight_log_max);
+}
+
+uint32_t
+ao_log_pos(uint8_t slot)
+{
+ return ((slot) * ao_config.flight_log_max);
+}
+
+static uint16_t
+ao_log_max_flight(void)
+{
+ uint8_t log_slot;
+ uint8_t log_slots;
+ uint16_t log_flight;
+ uint16_t max_flight = 0;
+
+ /* Scan the log space looking for the biggest flight number */
+ log_slots = ao_log_slots();
+ for (log_slot = 0; log_slot < log_slots; log_slot++) {
+ log_flight = ao_log_flight(log_slot);
+ if (!log_flight)
+ continue;
+ if (max_flight == 0 || (int16_t) (log_flight - max_flight) > 0)
+ max_flight = log_flight;
+ }
+ return max_flight;
+}
+
+void
+ao_log_scan(void) __reentrant
+{
+ uint8_t log_slot;
+ uint8_t log_slots;
+ uint8_t log_want;
+
+ ao_config_get();
+
+ ao_flight_number = ao_log_max_flight();
+ if (ao_flight_number)
+ if (++ao_flight_number == 0)
+ ao_flight_number = 1;
+
+ /* Now look through the log of flight numbers from erase operations and
+ * see if the last one is bigger than what we found above
+ */
+ for (log_slot = LOG_MAX_ERASE; log_slot-- > 0;) {
+ ao_log_read_erase(log_slot);
+ if (erase.unused == 0) {
+ if (ao_flight_number == 0 ||
+ (int16_t) (erase.flight - ao_flight_number) > 0)
+ ao_flight_number = erase.flight;
+ break;
+ }
+ }
+ if (ao_flight_number == 0)
+ ao_flight_number = 1;
+
+ /* With a flight number in hand, find a place to write a new log,
+ * use the target flight number to index the available log slots so
+ * that we write logs to each spot about the same number of times.
+ */
+
+ /* Find a log slot for the next flight, if available */
+ ao_log_current_pos = ao_log_end_pos = 0;
+ log_slots = ao_log_slots();
+ log_want = (ao_flight_number - 1) % log_slots;
+ log_slot = log_want;
+ do {
+ if (ao_log_flight(log_slot) == 0) {
+ ao_log_current_pos = ao_log_pos(log_slot);
+ ao_log_end_pos = ao_log_current_pos + ao_config.flight_log_max;
+ break;
+ }
+ if (++log_slot >= log_slots)
+ log_slot = 0;
+ } while (log_slot != log_want);
+
+ ao_wakeup(&ao_flight_number);
+}
+
+void
+ao_log_start(void)
+{
+ /* start logging */
+ ao_log_running = 1;
+ ao_wakeup(&ao_log_running);
+}
+
+void
+ao_log_stop(void)
+{
+ ao_log_running = 0;
+ ao_log_flush();
+}
+
+uint8_t
+ao_log_present(void)
+{
+ return ao_log_max_flight() != 0;
+}
+
+uint8_t
+ao_log_full(void)
+{
+ return ao_log_current_pos == ao_log_end_pos;
+}
+
+#if HAS_ADC
+static __xdata struct ao_task ao_log_task;
+#endif
+
+void
+ao_log_list(void) __reentrant
+{
+ uint8_t slot;
+ uint8_t slots;
+ uint16_t flight;
+
+ slots = ao_log_slots();
+ for (slot = 0; slot < slots; slot++)
+ {
+ flight = ao_log_flight(slot);
+ if (flight)
+ printf ("flight %d start %x end %x\n",
+ flight,
+ (uint16_t) (ao_log_pos(slot) >> 8),
+ (uint16_t) (ao_log_pos(slot+1) >> 8));
+ }
+ printf ("done\n");
+}
+
+void
+ao_log_delete(void) __reentrant
+{
+ uint8_t slot;
+ uint8_t slots;
+
+ ao_cmd_decimal();
+ if (ao_cmd_status != ao_cmd_success)
+ return;
+
+ slots = ao_log_slots();
+ /* Look for the flight log matching the requested flight */
+ if (ao_cmd_lex_i) {
+ for (slot = 0; slot < slots; slot++) {
+ if (ao_log_flight(slot) == ao_cmd_lex_i) {
+ ao_log_erase_mark();
+ ao_log_current_pos = ao_log_pos(slot);
+ ao_log_end_pos = ao_log_current_pos + ao_config.flight_log_max;
+ while (ao_log_current_pos < ao_log_end_pos) {
+ uint8_t i;
+ static __xdata uint8_t b;
+
+ /*
+ * Check to see if we've reached the end of
+ * the used memory to avoid re-erasing the same
+ * memory over and over again
+ */
+ for (i = 0; i < 16; i++) {
+ if (ao_storage_read(ao_log_current_pos + i, &b, 1))
+ if (b != 0xff)
+ break;
+ }
+ if (i == 16)
+ break;
+ ao_storage_erase(ao_log_current_pos);
+ ao_log_current_pos += ao_storage_block;
+ }
+ puts("Erased");
+ return;
+ }
+ }
+ }
+ printf("No such flight: %d\n", ao_cmd_lex_i);
+}
+
+__code struct ao_cmds ao_log_cmds[] = {
+ { ao_log_list, "l\0List logs" },
+ { ao_log_delete, "d <flight-number>\0Delete flight" },
+ { 0, NULL },
+};
+
+void
+ao_log_init(void)
+{
+ ao_log_running = 0;
+
+ /* For now, just log the flight starting at the begining of eeprom */
+ ao_log_state = ao_flight_invalid;
+
+ ao_cmd_register(&ao_log_cmds[0]);
+
+#ifndef HAS_ADC
+#error Define HAS_ADC for ao_log.c
+#endif
+#if HAS_ADC
+ /* Create a task to log events to eeprom */
+ ao_add_task(&ao_log_task, ao_log, "log");
+#endif
+}
projects / fw / altos / blobdiff