nicla-system: Add function to disable charging.

Author: sebromero

libraries/Nicla_System/src/Nicla_System.cpp

@@ -150,6 +150,14 @@ bool nicla::enableCharging(uint16_t mA, bool disableNtc)
   return _pmic.getFastChargeControlRegister() == _fastChargeRegisterData;
 }
 
+bool nicla::disableCharging()
+{
+  // Set Bit 1 to 1 to disable charging.
+  _fastChargeRegisterData |= 0b10;
+  _pmic.writeByte(BQ25120A_ADDRESS, BQ25120A_FAST_CHG, _fastChargeRegisterData);
+  return _pmic.getFastChargeControlRegister() == _fastChargeRegisterData;
+}
+
 bool nicla::runsOnBattery() {
   return _pmic.runsOnBattery(BQ25120A_ADDRESS);
 }

libraries/Nicla_System/src/Nicla_System.h

@@ -82,6 +82,13 @@ class nicla {
    */
   static bool enableCharging(uint16_t mA = 20, bool disableNtc = true);
 
+  /**
+   * @brief Disables charging of the battery. It can be resumed by calling enableCharging().
+   * 
+   * @return true If the charging is disabled successfully. False, otherwise.
+   */
+  static bool disableCharging();
+
   /**
    * @brief Determines if the board is charged from the battery.
    *