+/*
+ * 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.
+ */
+
+#include "ao.h"
+
+static __xdata uint8_t ao_log_mutex;
+static __xdata struct ao_log_record log;
+
+static uint8_t
+ao_log_csum(__xdata uint8_t *b) __reentrant
+{
+ uint8_t sum = 0x5a;
+ uint8_t i;
+
+ for (i = 0; i < sizeof (struct ao_log_record); i++)
+ sum += *b++;
+ return -sum;
+}
+
+uint8_t
+ao_log_data(__xdata struct ao_log_record *log) __reentrant
+{
+ uint8_t wrote = 0;
+ /* set checksum */
+ log->csum = 0;
+ log->csum = ao_log_csum((__xdata uint8_t *) log);
+ ao_mutex_get(&ao_log_mutex); {
+ if (ao_log_current_pos >= ao_log_end_pos && ao_log_running)
+ ao_log_stop();
+ if (ao_log_running) {
+ wrote = 1;
+ ao_storage_write(ao_log_current_pos,
+ log,
+ sizeof (struct ao_log_record));
+ ao_log_current_pos += sizeof (struct ao_log_record);
+ }
+ } ao_mutex_put(&ao_log_mutex);
+ return wrote;
+}
+
+static uint8_t
+ao_log_dump_check_data(void)
+{
+ if (ao_log_csum((uint8_t *) &log) != 0)
+ return 0;
+ return 1;
+}
+
+static __xdata uint8_t ao_log_adc_pos;
+
+/* a hack to make sure that ao_log_records fill the eeprom block in even units */
+typedef uint8_t check_log_size[1-(256 % sizeof(struct ao_log_record))] ;
+
+void
+ao_log(void)
+{
+ ao_storage_setup();
+
+ ao_log_scan();
+
+ while (!ao_log_running)
+ ao_sleep(&ao_log_running);
+
+ log.type = AO_LOG_FLIGHT;
+ log.tick = ao_flight_tick;
+#if HAS_ACCEL
+ log.u.flight.ground_accel = ao_ground_accel;
+#endif
+ log.u.flight.flight = ao_flight_number;
+ ao_log_data(&log);
+
+ /* Write the whole contents of the ring to the log
+ * when starting up.
+ */
+ ao_log_adc_pos = ao_adc_ring_next(ao_flight_adc);
+ for (;;) {
+ /* Write samples to EEPROM */
+ while (ao_log_adc_pos != ao_flight_adc) {
+ log.type = AO_LOG_SENSOR;
+ log.tick = ao_adc_ring[ao_log_adc_pos].tick;
+ log.u.sensor.accel = ao_adc_ring[ao_log_adc_pos].accel;
+ log.u.sensor.pres = ao_adc_ring[ao_log_adc_pos].pres;
+ ao_log_data(&log);
+ if ((ao_log_adc_pos & 0x1f) == 0) {
+ log.type = AO_LOG_TEMP_VOLT;
+ log.tick = ao_adc_ring[ao_log_adc_pos].tick;
+ log.u.temp_volt.temp = ao_adc_ring[ao_log_adc_pos].temp;
+ log.u.temp_volt.v_batt = ao_adc_ring[ao_log_adc_pos].v_batt;
+ ao_log_data(&log);
+ log.type = AO_LOG_DEPLOY;
+ log.tick = ao_adc_ring[ao_log_adc_pos].tick;
+ log.u.deploy.drogue = ao_adc_ring[ao_log_adc_pos].sense_d;
+ log.u.deploy.main = ao_adc_ring[ao_log_adc_pos].sense_m;
+ ao_log_data(&log);
+ }
+ ao_log_adc_pos = ao_adc_ring_next(ao_log_adc_pos);
+ }
+ /* Write state change to EEPROM */
+ if (ao_flight_state != ao_log_state) {
+ ao_log_state = ao_flight_state;
+ log.type = AO_LOG_STATE;
+ log.tick = ao_flight_tick;
+ log.u.state.state = ao_log_state;
+ log.u.state.reason = 0;
+ ao_log_data(&log);
+
+ if (ao_log_state == ao_flight_landed)
+ ao_log_stop();
+ }
+
+ /* Wait for a while */
+ ao_delay(AO_MS_TO_TICKS(100));
+
+ /* Stop logging when told to */
+ while (!ao_log_running)
+ ao_sleep(&ao_log_running);
+ }
+}
+
+uint16_t
+ao_log_flight(uint8_t slot)
+{
+ if (!ao_storage_read(ao_log_pos(slot),
+ &log,
+ sizeof (struct ao_log_record)))
+ return 0;
+
+ if (ao_log_dump_check_data() && log.type == AO_LOG_FLIGHT)
+ return log.u.flight.flight;
+ return 0;
+}