void hardware_clock_init(void) {
uint8_t i;
__disable_interrupt(); // Disable global interrupts
// Enable XT2 pins
P5SEL |= 0x0C;
// Use REFO as the FLL reference
UCSCTL3 = (UCSCTL3 & ~(SELREF_7)) | (SELREF_2);
UCSCTL4 |= SELA__REFOCLK; // ACLK source
uint16_t srRegisterState = __read_status_register() & SCG0;
__bis_SR_register(SCG0);
// Set lowest possible DCOx, MODx
UCSCTL0 = 0x0000;
// Select DCO range 50MHz operation
UCSCTL1 = DCORSEL_7 | 1;
UCSCTL2 = FLLD_0 + 550;
__bic_SR_register(SCG0);
for (i=0; i<100; i++) {
__delay_cycles(0xffff);
}
// check for oscillator fault
while (SFRIFG1 & OFIFG) {
UCSCTL7 &= ~(DCOFFG+XT1LFOFFG+XT2OFFG);
SFRIFG1 &= ~OFIFG;
}
SELECT_MCLK(SELM__DCOCLK);
SELECT_ACLK(SELA__REFOCLK);
SELECT_SMCLK(SELS__DCOCLK);
UCSCTL7 = 0; // Errata UCS11
__bis_SR_register(srRegisterState); // Restore previous SCG0
}
void SetupClockAndPowerManagementModule(void)
{
// see Frequency vs Supply Voltage in MSP4305438A data sheet
SetVCore(PMMCOREV_2);
// setup pins for XT1
P7SEL |= BIT0 + BIT1;
// Startup LFXT1 32 kHz crystal
while (LFXT_Start_Timeout(XT1DRIVE_0, 50000) == UCS_STATUS_ERROR);
// select the sources for the FLL reference and ACLK
SELECT_ACLK(SELA__XT1CLK);
SELECT_FLLREF(SELREF__XT1CLK);
// 512 * 32768 = 16777216 / 1024
Init_FLL_Settle(configCPU_CLOCK_HZ/configTICK_RATE_HZ, ACLK_MULTIPLIER);
// Disable FLL loop control
__bis_SR_register(SCG0);
// setup for quick wake up from interrupt and
// minimal power consumption in sleep mode
DISABLE_SVSL(); // SVS Low side is turned off
DISABLE_SVSL_RESET();
DISABLE_SVML(); // Monitor low side is turned off
DISABLE_SVML_INTERRUPT();
DISABLE_SVMH(); // Monitor high side is turned off
DISABLE_SVMH_INTERRUPT();
ENABLE_SVSH(); // SVS High side is turned on
ENABLE_SVSH_RESET(); // Enable POR on SVS Event
SVSH_ENABLED_IN_LPM_FULL_PERF(); // SVS high side Full perf mode,
// stays on in LPM3,enhanced protect
// Wait until high side, low side settled
while ((PMMIFG & SVSMLDLYIFG) == 0 && (PMMIFG & SVSMHDLYIFG) == 0);
CLEAR_PMM_IFGS();
#if CHECK_FOR_PMM15
/* make sure error pmm15 does not exist */
while (PMM15Check());
#endif
if (Errata())
{
/* Errata PMM17 - automatic prolongation mechanism
* SVSLOW is disabled
*/
*(unsigned int*)(0x0110) = 0x9602;
*(unsigned int*)(0x0112) |= 0x0800;
}
}
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 AppUart_init(void)
{
SELECT_ACLK(SELA__XT1CLK); // Source ACLK from LFXT1
P4SEL = BIT5 + BIT4; // P4.4,5 = USCI_A1 TXD/RXD
UCA1CTL1 |= UCSWRST; // **Put state machine in reset**
UCA1CTL0 = 0x00;
UCA1CTL1 = UCSSEL_1 + UCSWRST; // Use ACLK, keep RESET
UCA1BR0 = 0x03; // 32kHz/9600=3.41 (see User's Guide)
UCA1BR1 = 0x00; //
UCA1MCTL = UCBRS_3 + UCBRF_0; // Modulation UCBRSx=3, UCBRFx=0
UCA1CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
}
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();
}