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| author | Alex Maestas <git@se30.xyz> | 2023-12-17 17:40:19 +0000 |
|---|---|---|
| committer | Alex Maestas <git@se30.xyz> | 2023-12-17 17:40:19 +0000 |
| commit | 68f38652273bd6356e35dfcec0949f6783009dcf (patch) | |
| tree | 2373208f5982fddb5a4bae27bfede77571cba046 | |
| parent | 89e86fe6294948df0ca8aade93e9893f317dd5fc (diff) | |
| download | Sensor-Watch-68f38652273bd6356e35dfcec0949f6783009dcf.tar.gz Sensor-Watch-68f38652273bd6356e35dfcec0949f6783009dcf.tar.bz2 Sensor-Watch-68f38652273bd6356e35dfcec0949f6783009dcf.zip | |
work around silicon erratum in SUPC/VREG
| -rw-r--r-- | watch-library/hardware/watch/watch_private.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/watch-library/hardware/watch/watch_private.c b/watch-library/hardware/watch/watch_private.c index 4cae3ccb..20f4ee54 100644 --- a/watch-library/hardware/watch/watch_private.c +++ b/watch-library/hardware/watch/watch_private.c @@ -35,6 +35,10 @@ void _watch_init(void) { // Use switching regulator for lower power consumption. SUPC->VREG.bit.SEL = 1; + // work around a silicon erratum that causes the microcontroller to lock up on leaving standby: + // request that the voltage regulator run in standby, and also that it switch to PL0. + SUPC->VREG.bit.RUNSTDBY = 1; + SUPC->VREG.bit.STDBYPL0 = 1; while(!SUPC->STATUS.bit.VREGRDY); // wait for voltage regulator to become ready // check the battery voltage... |