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Fix Ublox M10 Setup (#4842) 

There is no EXTINT pin available on the Tdeck, which uses
the Ublox M10 GPS. Therefore our previous hack to use that pin
makes the GPS not work. That workaround was implemented to
fix sleep issues which have now since been fixed with the
state machine.

This patch restores the state prior to the hack, which is
known-working.

Additionaly, it was discovered that M10s hate it when you
try and save to non-extistent eeprom/SPI flash.

This patch creates a new SAVE command for the M10 that fixes
this issue.

Many thanks to @MisterC925 whose report and testing was
essential for this fix.

fixes https://github.com/meshtastic/firmware/issues/4625

Co-authored-by: Ken McGuire <kenm@paonia.com>
pull/4853/head
Tom Fifield 2024-09-24 18:50:03 +08:00 zatwierdzone przez GitHub
rodzic 4fde1ca2a8
commit b709d47832
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ID klucza GPG: B5690EEEBB952194
3 zmienionych plików z 34 dodań i 26 usunięć
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2
src/gps/GPS.cpp
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@ -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");

1
src/gps/GPS.h
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@ -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[];

57
src/gps/ubx.h
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@ -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.
@ -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