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examples/Charger/Charger.ino

@@ -12,7 +12,7 @@
 
   Usage:
 
-  1. Connect the Battery:
+  1. Connect a Battery to the board
   
   2. Upload the Sketch:
     - Open the provided sketch in the Arduino IDE.

examples/Standby_WakeFromPin/Standby_WakeFromPin.ino

@@ -29,7 +29,8 @@ void setup() {
     board.enableWakeupFromPin();
     #endif
 
-    // TODO why is this needed? Why true?
+    // TODO why is this needed? Why true? -> Peripherals still off after reset?
+    // only necessary for C33
     board.setAllPeripheralsPower(true);
     // TODO why is this needed?
     charger.setEnabled(false);

src/Battery.cpp

@@ -11,6 +11,7 @@ Battery::Battery(BatteryCharacteristics batteryCharacteristics) : characteristic
 }
 
 bool Battery::begin(bool enforceReload) {
+  // PMIC already initializes the I2C bus, so no need to call Wire.begin() for the fuel gauge
   if(PMIC.begin() != 0){
     return false;
   }
@@ -72,6 +73,7 @@ void Battery::configureBatteryCharacteristics(){
 
 void Battery::releaseFromHibernation(){
   // See section "Soft-Wakeup" in user manual https://www.analog.com/media/en/technical-documentation/user-guides/max1726x-modelgauge-m5-ez-user-guide.pdf
+  // TODO to preserve the hiberation config, probably better to only set bit 15 to 0
   writeRegister16Bits(this->wire, FUEL_GAUGE_ADDRESS, HIB_CFG_REG, 0x0);      // Exit Hibernate Mode
   writeRegister16Bits(this->wire, FUEL_GAUGE_ADDRESS, SOFT_WAKEUP_REG, 0x90); // Wakes up the fuel gauge from hibernate mode to reduce the response time of the IC to configuration changes  
   writeRegister16Bits(this->wire, FUEL_GAUGE_ADDRESS, SOFT_WAKEUP_REG, 0x0);  // This command must be manually cleared (0x0000) afterward to keep proper fuel gauge timing

src/WireUtils.h

@@ -101,6 +101,7 @@ static inline uint8_t getBit(TwoWire *wire, uint8_t address, uint8_t reg, uint8_
  * @param indexFrom The index of the first bit to replace starting from LSB (0)
  * @param indexTo The index of the last bit (included) to replace starting from LSB (0)
  */
+// TODO switch order of parameters to conform with bitWrite()
 static inline void replaceRegisterBits(TwoWire *wire, uint8_t address, uint8_t reg, uint16_t data, uint16_t indexFrom, uint8_t indexTo) {
     uint16_t registerValue = readRegister16Bits(wire, address, reg);
 
@@ -126,6 +127,7 @@ static inline void replaceRegisterBits(TwoWire *wire, uint8_t address, uint8_t r
  * @param data The new data (1 bit) to write to the register.
  * @param index The index of the bit to replace.
  */
+// TODO switch order of parameters to conform with bitWrite()
 static inline void replaceRegisterBit(TwoWire *wire, uint8_t address, uint8_t reg, uint16_t data, uint16_t index) {
     replaceRegisterBits(wire, address, reg, data, index, index);
 }