Fix rak4631 boot with DC/DC#1914
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This fixes the problem @Emmpunkt was having - not being able to boot with DC/DC on. |
| if (sd_enabled) { | ||
| sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE); | ||
| } else { | ||
| NRF_POWER->DCDCEN = 1; |
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I guess this will increase the power consumption of all NRF52 repeaters (running without softdevice) by something like 20 to 30%.
I have a board with RAK4630 (uart.cz Solar Mesh Baseboard) running with DCDC enabled for several months now without any issues. And a lot of other people are running similar RAK4630 and RAK4631 hardware without such issues.
So I really wonder what is different for @Emmpunkt in #1878 and if this change is justified.
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If "powersaving on" is used, repeaters dont need this DC2DC to achieve 6mA.
This DC2DC is more meaningful to companions and repeaters without powersaving on.
I guess DC2DC is less reliable at low voltage than the default LDO way.
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So besides disabling DC2DC, this PR is to fix the NRF52 power management too? Will disabling of DC2DC alone can fix this problem? |
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Wait 50ms after boot before actually shutting down on low voltage Also fix deadlock issue where only USB can wake the device
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Only enable DC/DC converter when SoftDevice is managing power.
fixes #1879
Build here https://mcimages.weebl.me/?commitId=fix-rak4631-boot&variant=RAK_4631_repeater