/*! Configure the pins used for reading the battery state and
* charging the battery.
*/
void InitBattery(void)
{
// enable the resistor on the interface pins to the battery charger
BAT_CHARGE_REN |= BAT_CHARGE_OPEN_DRAIN_BITS;
// Start with these as pull downs so we use less current
BAT_CHARGE_OUT &= ~BAT_CHARGE_OPEN_DRAIN_BITS;
// Set these bits as inputs
BAT_CHARGE_DIR &= ~BAT_CHARGE_OPEN_DRAIN_BITS;
// charge enable output
BAT_CHARGE_DIR |= BAT_CHARGE_ENABLE_PIN;
/* turn on the pullup in the MSP430 for the open drain bit of the charger
* If the watch has 5V then we don't care about the current draw of the
* of the pull down resistor. Otherwise, the charge chip will let
* the pin go high
*/
BAT_CHARGE_OUT |= BAT_CHARGE_PWR_BIT;
BATTERY_CHARGE_DISABLE();
InitAdc();
ChargeEnable = pdTRUE;
ChargeStatus = CHARGE_STATUS_OFF;
}
static int timerChargingControl(TimerHandle timer, void *context)
{
Timer_Destroy(timer);
// Get reading
unsigned char BatteryCharging = BAT_CHARGE_IN;
// Work out if external power is connected
bool powerGood = !(BatteryCharging & BAT_CHARGE_PWR_GOOD);
// Work out battery state
BatteryCharging &= BAT_CHARGE_STAT1 | BAT_CHARGE_STAT2;
unsigned int powerState = BatteryCharging >> 3;
if (powerState == BATTERY_CHARGE_OFF_FAULT_SLEEP)
{
BATTERY_CHARGE_DISABLE();
BAT_CHARGE_OUT &= ~BAT_CHARGE_OPEN_DRAIN_BITS;
}
// Work out new state
Battery_State newState = powerState;
if (powerGood)
newState |= Battery_Powered;
// Launch ADC cycle
Adc_Request(adcBatteryLevel, adcBattery, (void*)newState);
return 0;
}
static void EnterShippingMode(void)
{
/* Turn off the watchdog timer */
WDTCTL = WDTPW + WDTHOLD;
#ifdef DIGITAL
ClearLcd();
#endif
ConfigResetPin(RST_PIN_ENABLED);
__delay_cycles(100000);
__disable_interrupt();
__no_operation();
DisableRtosTick();
/*
* the radio draws more current in reset than it does after
* the patch is loaded
*/
DISABLE_DISPLAY_POWER();
DISABLE_LCD_ENABLE();
BATTERY_CHARGE_DISABLE();
LIGHT_SENSOR_SHUTDOWN();
BATTERY_SENSE_DISABLE();
HARDWARE_CFG_SENSE_DISABLE();
APPLE_POWER_DISABLE();
ACCELEROMETER_INT_DISABLE();
DISABLE_BUTTONS();
#ifdef DIGITAL
/* SHIPPING */
ENABLE_SHIPPING_WAKEUP();
#endif
SELECT_ACLK(SELA__REFOCLK);
SELECT_FLLREF(SELREF__REFOCLK);
UCSCTL8 &= ~SMCLKREQEN;
UCSCTL6 |= SMCLKOFF;
/* disable aclk */
P11SEL &= ~BIT0;
XT1_Stop();
/* turn off the regulator */
PMMCTL0_H = PMMPW_H;
PMMCTL0_L = PMMREGOFF;
__low_power_mode_4();
__no_operation();
__no_operation();
/* should not get here without a power event */
SoftwareReset();
}
void ToggleCharging(void)
{
ChargeEnable = !ChargeEnable;
PrintString2("- Charge ", ChargeEnable ? "Enabled" : "Disabled");
if (!ChargeEnable)
{
BATTERY_CHARGE_DISABLE();
BAT_CHARGE_OUT &= ~BAT_CHARGE_STATUS_OPEN_DRAIN_BITS;
ChargeStatus = CHARGE_STATUS_OFF;
}
}
static void EnterShippingMode(void)
{
/* Turn off the watchdog timer */
WDTCTL = WDTPW | WDTHOLD;
EnableRstPin();
__delay_cycles(100000);
__disable_interrupt();
__no_operation();
/*
* the radio draws more current in reset than it does after
* the patch is loaded
*/
DISABLE_DISPLAY_POWER();
DISABLE_LCD_ENABLE();
BATTERY_CHARGE_DISABLE();
LIGHT_SENSOR_SHUTDOWN();
BATTERY_SENSE_DISABLE();
HARDWARE_CFG_SENSE_DISABLE();
APPLE_POWER_DISABLE();
ACCELEROMETER_INT_DISABLE();
DISABLE_BUTTONS();
SELECT_ACLK(SELA__REFOCLK);
SELECT_FLLREF(SELREF__REFOCLK);
UCSCTL8 &= ~SMCLKREQEN;
UCSCTL6 |= SMCLKOFF;
/* disable aclk */
P11SEL &= ~BIT0;
XT1_Stop();
/* turn off the regulator */
unsigned char temp = PMMCTL0_L;
PMMCTL0_H = PMMPW_H;
PMMCTL0_L = PMMREGOFF | temp;
LPM4;
__no_operation();
__no_operation();
/* should not get here without a power event */
SoftwareReset();
}