xiao-nrf keep vbat_en to low to prevent issues ...

variants/xiao_nrf52/variant.cpp

@@ -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);