Improvements to JAWBONE firmware#17
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July 11, 2026 23:14
…tracking - GPStimeInitAutobaud(): tries 9600 baud then 115200, alternating every 5 s, locks when a valid '$'-prefixed NMEA sentence is received - Enable UART1 hardware FIFO (was disabled) so bytes don't drop during ISR - ISR: read full DR register to detect framing errors (wrong baud indicator); guard against buffer overflow on over-long sentences - ISR: buffer debug-print sentences and flush from main loop (safe to printf) - parse_GPS_data: add GPGGA/NGGA fallback prefixes alongside GNGGA; likewise GPRMC/NRMC fallbacks for GNRMC - Parse UTC date (DD/MM/YY) from RMC field 10 into GPStimeData.day/month/year - Parse GSV sentences for all constellations (GPS/GLONASS/Galileo/BeiDou/QZSS) and maintain per-constellation and total sats-in-view counters - get_nmea_field_str() helper for safe NMEA field extraction - Switch to GPStimeInitAutobaud() in the WSPR flow
GPS soft-start power-on: - gps_power_on(): uses internal ~50kΩ pull-down for 10 ms to limit MOSFET gate inrush before fully asserting the output — mitigates brownout resets on GPS power-on that can be caused by inrush current dragging the 3.3 V rail - All three GPS turn-on sites (WSPRbeaconInit, scheduler SEQ==10, datalog) now call gps_power_on() instead of bare gpio_put Watchdog coverage: - watchdog_update() in get_user_input() so long string entry doesn't trigger reset - 5-second watchdog enabled before the main loop; watchdog_update() each iteration - Menu prompt replaced with a 1-second-chunk loop feeding the watchdog - Frequency tuning "press any key" wait feeds the watchdog Geofencing: - is_position_geofenced(): checks 4-char Maidenhead against a table of restricted grids (Yemen and North Korea for now); WSPR TX suppressed when position matches WSPRbeaconGetTxStatus(): - Returns a human-readable string describing current TX/GPS state (no-comms, GPS acquiring, waiting for slot, TX progress, next-TX countdown) - Used in the periodic telemetry StampPrintf to show lat/lon/grid/sats/TX status
… HardFault Binary GPS flash datalog (gpslog module): - New gpslog.h/gpslog.c: 32-byte packed binary records in flash sectors 66-320 (255 sectors × 128 records = 32 640 slots); metadata sector at 65 - Modes: 1=circular (evict oldest sector when full), 2=stop-when-full - gpslog_append(), gpslog_dump_csv(), gpslog_wipe(), gpslog_stats() API - Altitude stored with +1000 m offset to support negative altitudes - GPS stability check: waits up to 30 s for position to settle (<100 m delta, no rising sat count) before logging - datalog_loop() fully rewritten; GPS turned on via gps_power_on(); uses GPStimeInitAutobaud(); logs date/time from RMC, all constellation sats RTC dormant sleep: - go_to_sleep(uint32_t minutes): switches clk_sys to XOSC, sets RTC alarm, enters deep sleep (WFI with SLEEPDEEP set), then watchdog-reboots on wake - CMakeLists: add hardware_rtc link library; add gpslog.c source Menu improvements: - 'D' menu option: active data-log mode selector (0/1/2/W/D), prompts for sleep interval in minutes, stores in NVRAM at offset 31 - show_values(): shows GPS log fill stats and datalog sleep interval - NVRAM: remove obsolete _custom_PCB, _battery_mode, _band_hop; add _Datalog_sleep_minutes; offsets 13, 18, 26 marked unused (preserved for backward NVRAM compatibility) HardFault handler: - isr_hardfault (naked): saves MSP/PSP stack pointer and calls C handler - hardfault_handler_c: stores PC + LR in watchdog scratch[1]/[2], triggers 100 ms watchdog reset - On boot: checks scratch[0] == 0xDEADBEEF, saves crash_pc/crash_lr - 'Z' menu command recalls last crash address pair - Printable-only ASCII filter on startup keypress detection to suppress spurious CDC control bytes sent by terminal emulators on USB connect
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Hi,
I made improvements to the JAWBONE firmware that I would like to submit for your consideration.
Several improvements:
I have done limited testing. It works well for me, but I did not test WSPR transmission although I did not change it.
I would appreciate if you could test on your end too, to verify.