pico-tracker/firmware/Pre-flight.md

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## Updating telemetry ##
- Set callsign in `src/main.c`
- Update ukhas format string. `format_telemetry_string` in `src/main.c`
- Update aprs telemetry.`encode_telemetry` in `src/aprs.c`. This same format is re-used in backlog.
- Describe the new formats in `tools/aprs/telemetry_format.py`
- Run `tools/aprs/equations.py` to setup new format APRS-IS
## Pre-Flight Checklist ##
- In `hw_config.h`
- `USE_XOSC` is set. Otherwise the symbol timing frequency will be
somewhat inaccurate.
- `XOSC_TCXO_SHUTDOWN_EN` should be set for lowest power if required
- `RF_TX_ENABLE` is set
- `APRS_ENABLE` is set if APRS is to be used on the flight
- `APRS_USE_GEOFENCE` is set
- `TELEMETRY_ENABLE` is set
- `TELEMETRY_USE_GEOFENCE` is set
- `ARISS_ENABLE` is set if ARISS is to be used on the flight
- `ARISS_USE_GEOFENCE` is set
- `GEOFENCE_USE_PREFIX` is set
- Check the `COLD_OUT` parameters. These prevent start-up spikes when the battery may not be viable.
- Check the correct barometer is defined, for instance `BAROMETER_TYPE_MS5607` is set.
- `DEBUG_USE_INTWATCHDOG` can be disabled during flight. This saves some power
- Check interrupts are regular enough to kick the hardware
watchdog under all conditions.
- In `watchdog.h`
- Set the various `MAXIDLE` values to values determined during
testing. These define how many sleep cycles are permitted in that
state before we stop kicking the watchdog. 0xFFFF seems like a
good conservative value, but you may want to be more agressive.
- In `aprs.h`
- Set callsign and symbol
- Make sure `APRS_FLIGHT_PARAMS` is defined
- In `gps_osp.c`
- Check reinit parameters for `gps_get_data_wrapped` are reasonable.
- Check memory works and is erased
- `make test tc=backlog_write_read` Run this more than once to check functionality of a non-blank memory
- `make test tc=mem_erase_all`
- Check geofences are in order. Run
- `make test tc=location_aprs`
- `make test tc=location_telemetry`