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Merge pull request #212 from fdlamotte/xiao_nrf52-batread

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xiao-nrf keep vbat_en to low to prevent issues ...
This commit is contained in:
ripplebiz
2025-04-21 16:29:26 +10:00
committed by GitHub
parent 1b25a63996 6735960a4e
commit c0eb5bffaa
2 changed files with 21 additions and 17 deletions
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14
variants/xiao_nrf52/variant.cpp
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@@ -60,11 +60,19 @@ void initVariant()
// Disable reading of the BAT voltage.
// https://wiki.seeedstudio.com/XIAO_BLE#q3-what-are-the-considerations-when-using-xiao-nrf52840-sense-for-battery-charging
pinMode(VBAT_ENABLE, OUTPUT);
digitalWrite(VBAT_ENABLE, HIGH);
//digitalWrite(VBAT_ENABLE, HIGH);
// This was taken from Seeed github butis not coherent with the doc,
// VBAT_ENABLE should be kept to LOW to protect P0.14, (1500/500)*(4.2-3.3)+3.3 = 3.9V > 3.6V
// This induces a 3mA current in the resistors :( but it's better than burning the nrf
digitalWrite(VBAT_ENABLE, LOW);
// Low charging current.
// Low charging current (50mA)
// https://wiki.seeedstudio.com/XIAO_BLE#battery-charging-current
pinMode(PIN_CHARGING_CURRENT, INPUT);
//pinMode(PIN_CHARGING_CURRENT, INPUT);
// High charging current (100mA)
pinMode(PIN_CHARGING_CURRENT, OUTPUT);
digitalWrite(PIN_CHARGING_CURRENT, LOW);
pinMode(PIN_QSPI_CS, OUTPUT);
digitalWrite(PIN_QSPI_CS, HIGH);