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Fix Ublox M10 Setup #4842

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Sep 24, 2024
Merged

Fix Ublox M10 Setup #4842

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2 changes: 1 addition & 1 deletion src/gps/GPS.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -664,7 +664,7 @@ bool GPS::setup()
// As the M10 has no flash, the best we can do to preserve the config is to set it in RAM and BBR.
// BBR will survive a restart, and power off for a while, but modules with small backup
// batteries or super caps will not retain the config for a long power off time.
msglen = makeUBXPacket(0x06, 0x09, sizeof(_message_SAVE), _message_SAVE);
msglen = makeUBXPacket(0x06, 0x09, sizeof(_message_SAVE_10), _message_SAVE_10);
_serial_gps->write(UBXscratch, msglen);
if (getACK(0x06, 0x09, 2000) != GNSS_RESPONSE_OK) {
LOG_WARN("Unable to save GNSS module configuration.\n");
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1 change: 1 addition & 0 deletions src/gps/GPS.h
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Expand Up @@ -134,6 +134,7 @@ class GPS : private concurrency::OSThread
static const uint8_t _message_GGA[];
static const uint8_t _message_PMS[];
static const uint8_t _message_SAVE[];
static const uint8_t _message_SAVE_10[];

// VALSET Commands for M10
static const uint8_t _message_VALSET_PM[];
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57 changes: 32 additions & 25 deletions src/gps/ubx.h
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Expand Up @@ -323,6 +323,13 @@ const uint8_t GPS::_message_SAVE[] = {
0x17 // deviceMask: BBR, Flash, EEPROM, and SPI Flash
};

const uint8_t GPS::_message_SAVE_10[] = {
0x00, 0x00, 0x00, 0x00, // clearMask: no sections cleared
0xFF, 0xFF, 0x00, 0x00, // saveMask: save all sections
0x00, 0x00, 0x00, 0x00, // loadMask: no sections loaded
0x01 // deviceMask: only save to BBR
};

// As the M10 has no flash, the best we can do to preserve the config is to set it in RAM and BBR.
// BBR will survive a restart, and power off for a while, but modules with small backup
// batteries or super caps will not retain the config for a long power off time.
Expand All @@ -342,36 +349,36 @@ const uint8_t GPS::_message_SAVE[] = {
// has details on low-power modes

/*
CFG-PM2 has been replaced by many CFG-PM commands
CFG-PMS has been removed

CFG-PM-OPERATEMODE E1 (0 | 1 | 2) -> 1 (PSMOO), because sporadic position updates are required instead of continous tracking <10s
(PSMCT) CFG-PM-POSUPDATEPERIOD U4 -> 0ms, no self-timed wakup because receiver power mode is controlled via "software standby
mode" by legacy UBX-RXM-PMREQ request CFG-PM-ACQPERIOD U4 -> 0ms, because receiver power mode is controlled via "software standby
mode" by legacy UBX-RXM-PMREQ request CFG-PM-ONTIME U4 -> 0ms, optional I guess CFG-PM-EXTINTBACKUP L -> 1, force receiver into
BACKUP mode when EXTINT (should be connected to GPS_EN_PIN) pin is "low"

This is required because the receiver never enters low power mode if microcontroller is in deep-sleep.
Maybe the changing UART_RX levels trigger a wakeup but even with UBX-RXM-PMREQ[12] = 0x00 (all external wakeup sources disabled)
the receivcer remains in aquisition state -> potentially a bug

Workaround: Control the EXTINT pin by the GPS_EN_PIN signal

As mentioned in the M10 operational issues down below, power save won't allow the use of BDS B1C.
CFG-SIGNAL-BDS_B1C_ENA L -> 0
OPERATEMODE E1 2 (0 | 1 | 2)
POSUPDATEPERIOD U4 5
ACQPERIOD U4 10
GRIDOFFSET U4 0
ONTIME U2 1
MINACQTIME U1 0
MAXACQTIME U1 0
DONOTENTEROFF L 1
WAITTIMEFIX L 1
UPDATEEPH L 1
EXTINTWAKE L 0 no ext ints
EXTINTBACKUP L 0 no ext ints
EXTINTINACTIVE L 0 no ext ints
EXTINTACTIVITY U4 0 no ext ints
LIMITPEAKCURRENT L 1

// Ram layer config message:
// 01 01 00 00 01 00 D0 20 01 02 00 D0 40 00 00 00 00 03 00 D0 40 00 00 00 00 05 00 D0 30 00 00 0D 00 D0 10 01
// b5 62 06 8a 26 00 00 01 00 00 01 00 d0 20 02 02 00 d0 40 05 00 00 00 05 00 d0 30 01 00 08 00 d0 10 01 09 00 d0 10 01 10 00 d0
// 10 01 8b de

// BBR layer config message:
// 01 02 00 00 01 00 D0 20 01 02 00 D0 40 00 00 00 00 03 00 D0 40 00 00 00 00 05 00 D0 30 00 00 0D 00 D0 10 01
// b5 62 06 8a 26 00 00 02 00 00 01 00 d0 20 02 02 00 d0 40 05 00 00 00 05 00 d0 30 01 00 08 00 d0 10 01 09 00 d0 10 01 10 00 d0
// 10 01 8c 03
*/
const uint8_t GPS::_message_VALSET_PM_RAM[] = {0x01, 0x01, 0x00, 0x00, 0x0F, 0x00, 0x31, 0x10, 0x00, 0x01, 0x00, 0xD0, 0x20, 0x01,
0x02, 0x00, 0xD0, 0x40, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0xD0, 0x40, 0x00, 0x00,
0x00, 0x00, 0x05, 0x00, 0xD0, 0x30, 0x00, 0x00, 0x0D, 0x00, 0xD0, 0x10, 0x01};
const uint8_t GPS::_message_VALSET_PM_BBR[] = {0x01, 0x02, 0x00, 0x00, 0x0F, 0x00, 0x31, 0x10, 0x00, 0x01, 0x00, 0xD0, 0x20, 0x01,
0x02, 0x00, 0xD0, 0x40, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0xD0, 0x40, 0x00, 0x00,
0x00, 0x00, 0x05, 0x00, 0xD0, 0x30, 0x00, 0x00, 0x0D, 0x00, 0xD0, 0x10, 0x01};
const uint8_t GPS::_message_VALSET_PM_RAM[] = {0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0xd0, 0x20, 0x02, 0x02, 0x00, 0xd0, 0x40,
0x05, 0x00, 0x00, 0x00, 0x05, 0x00, 0xd0, 0x30, 0x01, 0x00, 0x08, 0x00, 0xd0,
0x10, 0x01, 0x09, 0x00, 0xd0, 0x10, 0x01, 0x10, 0x00, 0xd0, 0x10, 0x01};
const uint8_t GPS::_message_VALSET_PM_BBR[] = {0x00, 0x02, 0x00, 0x00, 0x01, 0x00, 0xd0, 0x20, 0x02, 0x02, 0x00, 0xd0, 0x40,
0x05, 0x00, 0x00, 0x00, 0x05, 0x00, 0xd0, 0x30, 0x01, 0x00, 0x08, 0x00, 0xd0,
0x10, 0x01, 0x09, 0x00, 0xd0, 0x10, 0x01, 0x10, 0x00, 0xd0, 0x10, 0x01};

/*
CFG-ITFM replaced by 5 valset messages which can be combined into one for RAM and one for BBR
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