# SYSCTL Module

System Control (SysCtl) determines the overall operation of the device. The API provides functions to configure the clocking of the device, the set of peripherals that are enabled, the windowed watchdog, the NMI watchdog, and low-power modes. It also provides functions to handle and obtain information about resets and missing clock detection failures.

group `sysctl_api`

  Defines

  `SYSCTL_WD_CHKBITS` 0x0028U
  `SYSCTL_WD_ENRSTKEY` 0x0055U
  `SYSCTL_WD_RSTKEY` 0x00AAU
  `SYSCTL_PERIPH_REG_M` 0x001FU
  `SYSCTL_PERIPH_REG_S` 0x0000U
  `SYSCTL_PERIPH_BIT_M` 0x1F00U
  `SYSCTL_PERIPH_BIT_S` 0x0008U
  `SYSCTL_REG_KEY` 0xA5A50000U
  `SYSCTL_PLL_KEY` 0XCAFE0000U
  `SYSCTL_TYPE_LOCK_S` 0xFU
  `SYSCTL_LPM_IDLE` 0x0000U
  `SYSCTL_LPM_HALT` 0x0002U
  `SYSCTL_DEFAULT_OSC_FREQ` 10000000U
  `SYSCTL_SYNCSELECT_SYNCIN_M` SYSCTL_SYNCSELECT_EPWM4SYNCIN_M
  `SYSCTL_BOOT_ROM_STATUS` 0x0002U
  `SYSCTL_BOOT_ROM_POR` 0x2000U
  `SYSCTL_BOOT_ROM_XRS` 0x1000U
  `Device_cal` ((void (*)(void))((uintptr_t)0x070282))
  `SYSCTL_ODIV_M` (uint32_t)0x00700000U
  `SYSCTL_ODIV_S` 20U
  `SYSCTL_ODIV`(x) ((((uint32_t)(x) - 1U) << SYSCTL_ODIV_S

  ) & \

  SYSCTL_ODIV_M)

    Macro to format Clock divider value. x is a number from 1 to 8.

  `SYSCTL_SYSDIV_M` 0x00001F80U
  `SYSCTL_SYSDIV_S` 7U
  `SYSCTL_SYSDIV`(x) ((((x) / 2U) << SYSCTL_SYSDIV_S) & SYSCTL_SYSDIV_M)

    Macro to format system clock divider value. x must be 1 or even values up to 126.

  `SYSCTL_IMULT_M` 0x0000007FU
  `SYSCTL_IMULT_S` 0U
  `SYSCTL_IMULT`(x) (((x) << SYSCTL_IMULT_S) & SYSCTL_IMULT_M)

    Macro to format integer multiplier value. x is a number from 1 to 127.

  `SYSCTL_FMULT_M` 0x00006000U
  `SYSCTL_FMULT_S` 13U
  `SYSCTL_FMULT_NONE` 0x00000000U

    No fractional multiplier.

  `SYSCTL_FMULT_0` 0x00000000U

    No fractional multiplier.

  `SYSCTL_FMULT_1_4` 0x00002000U

    Fractional multiplier of 0.25.

  `SYSCTL_FMULT_1_2` 0x00004000U

    Fractional multiplier of 0.50.

  `SYSCTL_FMULT_3_4` 0x00006000U

    Fractional multiplier of 0.75.

  `SYSCTL_OSCSRC_M` 0x00030000U
  `SYSCTL_OSCSRC_S` 16U
  `SYSCTL_OSCSRC_OSC2` 0x00000000U

    Internal oscillator INTOSC2.

  `SYSCTL_OSCSRC_XTAL` 0x00010000U

    External oscillator (XTAL) in crystal mode.

  `SYSCTL_OSCSRC_XTAL_SE` 0x00030000U

    External oscillator (XTAL) in single-ended mode.

  `SYSCTL_OSCSRC_OSC1` 0x00020000U

    Internal oscillator INTOSC1.

  `SYSCTL_PLL_ENABLE` 0x80000000U

    Enable PLL.

  `SYSCTL_PLL_DISABLE` 0x00000000U

    Disable PLL.

  `SYSCTL_PLL_RETRIES` 100U
  `SYSCTL_PLLLOCK_TIMEOUT` 2000U
  `SYSCTL_DCC_COUNTER0_WINDOW` 100U
  `SYSCTL_NMI_NMIINT` 0x1U

    NMI Interrupt Flag.

  `SYSCTL_NMI_CLOCKFAIL` 0x2U

    Clock Fail Interrupt Flag.

  `SYSCTL_NMI_RAMUNCERR` 0x4U

    RAM Uncorrectable Error NMI Flag.

  `SYSCTL_NMI_FLUNCERR` 0x8U

    Flash Uncorrectable Error NMI Flag.

  `SYSCTL_NMI_PIEVECTERR` 0x40U

    PIE Vector Fetch Error Flag.

  `SYSCTL_NMI_CLBNMI` 0x100U

    Configurable Logic Block NMI Flag.

  `SYSCTL_NMI_SWERR` 0x2000U

    SW Error Force NMI Flag.

  `SYSCTL_CAUSE_POR` 0x00000001U

    Power-on reset.

  `SYSCTL_CAUSE_XRS` 0x00000002U

    External reset pin.

  `SYSCTL_CAUSE_WDRS` 0x00000004U

    Watchdog reset.

  `SYSCTL_CAUSE_NMIWDRS` 0x00000008U

    NMI watchdog reset.

  `SYSCTL_CAUSE_SCCRESET` 0x00000100U

    SCCRESETn by DCSM.

  `SYSCTL_ADCSOC_SRC_PWM1SOCA` 0x1U

    ePWM1 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM2SOCA` 0x2U

    ePWM2 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM3SOCA` 0x4U

    ePWM3 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM4SOCA` 0x8U

    ePWM4 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM5SOCA` 0x10U

    ePWM5 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM6SOCA` 0x20U

    ePWM6 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM7SOCA` 0x40U

    ePWM7 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM8SOCA` 0x80U

    ePWM8 SOCA for ADCSOCAO

  `SYSCTL_ADCSOC_SRC_PWM1SOCB` 0x10000U

    ePWM1 SOCB for ADCSOCBO

  `SYSCTL_ADCSOC_SRC_PWM2SOCB` 0x20000U

    ePWM2 SOCB for ADCSOCBO

  `SYSCTL_ADCSOC_SRC_PWM3SOCB` 0x40000U

    ePWM3 SOCB for ADCSOCBO

  `SYSCTL_ADCSOC_SRC_PWM4SOCB` 0x80000U

    ePWM4 SOCB for ADCSOCBO

  `SYSCTL_ADCSOC_SRC_PWM5SOCB` 0x100000U

    ePWM5 SOCB for ADCSOCBO

  `SYSCTL_ADCSOC_SRC_PWM6SOCB` 0x200000U

    ePWM6 SOCB for ADCSOCBO

  `SYSCTL_ADCSOC_SRC_PWM7SOCB` 0x400000U

    ePWM7 SOCB for ADCSOCBO

  `SYSCTL_ADCSOC_SRC_PWM8SOCB` 0x800000U

    ePWM8 SOCB for ADCSOCBO

  Enums

  enum `SysCtl_PeripheralPCLOCKCR`

    The following are values that can be passed to SysCtl_enablePeripheral() and SysCtl_disablePeripheral() as the peripheral parameter.

    Values:

    enumerator `SYSCTL_PERIPH_CLK_CLA1` = 0x0000

      CLA1 clock.

    enumerator `SYSCTL_PERIPH_CLK_DMA` = 0x0200

      DMA clock.

    enumerator `SYSCTL_PERIPH_CLK_TIMER0` = 0x0300

      CPUTIMER0 clock.

    enumerator `SYSCTL_PERIPH_CLK_TIMER1` = 0x0400

      CPUTIMER1 clock.

    enumerator `SYSCTL_PERIPH_CLK_TIMER2` = 0x0500

      CPUTIMER2 clock.

    enumerator `SYSCTL_PERIPH_CLK_HRPWM` = 0x1000

      HRPWM clock.

    enumerator `SYSCTL_PERIPH_CLK_TBCLKSYNC` = 0x1200

      TBCLKSYNC clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM1` = 0x0002

      EPWM1 clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM2` = 0x0102

      EPWM2 clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM3` = 0x0202

      EPWM3 clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM4` = 0x0302

      EPWM4 clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM5` = 0x0402

      EPWM5 clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM6` = 0x0502

      EPWM6 clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM7` = 0x0602

      EPWM7 clock.

    enumerator `SYSCTL_PERIPH_CLK_EPWM8` = 0x0702

      EPWM8 clock.

    enumerator `SYSCTL_PERIPH_CLK_ECAP1` = 0x0003

      ECAP1 clock.

    enumerator `SYSCTL_PERIPH_CLK_ECAP2` = 0x0103

      ECAP2 clock.

    enumerator `SYSCTL_PERIPH_CLK_ECAP3` = 0x0203

      ECAP3 clock.

    enumerator `SYSCTL_PERIPH_CLK_ECAP4` = 0x0303

      ECAP4 clock.

    enumerator `SYSCTL_PERIPH_CLK_ECAP5` = 0x0403

      ECAP5 clock.

    enumerator `SYSCTL_PERIPH_CLK_ECAP6` = 0x0503

      ECAP6 clock.

    enumerator `SYSCTL_PERIPH_CLK_ECAP7` = 0x0603

      ECAP7 clock.

    enumerator `SYSCTL_PERIPH_CLK_EQEP1` = 0x0004

      EQEP1 clock.

    enumerator `SYSCTL_PERIPH_CLK_EQEP2` = 0x0104

      EQEP2 clock.

    enumerator `SYSCTL_PERIPH_CLK_SD1` = 0x0006

      SD1 clock.

    enumerator `SYSCTL_PERIPH_CLK_SCIA` = 0x0007

      SCI_A clock.

    enumerator `SYSCTL_PERIPH_CLK_SCIB` = 0x0107

      SCI_B clock.

    enumerator `SYSCTL_PERIPH_CLK_SPIA` = 0x0008

      SPI_A clock.

    enumerator `SYSCTL_PERIPH_CLK_SPIB` = 0x0108

      SPI_B clock.

    enumerator `SYSCTL_PERIPH_CLK_I2CA` = 0x0009

      I2C_A clock.

    enumerator `SYSCTL_PERIPH_CLK_CANA` = 0x000A

      CAN_A clock.

    enumerator `SYSCTL_PERIPH_CLK_CANB` = 0x010A

      CAN_B clock.

    enumerator `SYSCTL_PERIPH_CLK_ADCA` = 0x000D

      ADC_A clock.

    enumerator `SYSCTL_PERIPH_CLK_ADCB` = 0x010D

      ADC_B clock.

    enumerator `SYSCTL_PERIPH_CLK_ADCC` = 0x020D

      ADC_C clock.

    enumerator `SYSCTL_PERIPH_CLK_CMPSS1` = 0x000E

      CMPSS1 clock.

    enumerator `SYSCTL_PERIPH_CLK_CMPSS2` = 0x010E

      CMPSS2 clock.

    enumerator `SYSCTL_PERIPH_CLK_CMPSS3` = 0x020E

      CMPSS3 clock.

    enumerator `SYSCTL_PERIPH_CLK_CMPSS4` = 0x030E

      CMPSS4 clock.

    enumerator `SYSCTL_PERIPH_CLK_CMPSS5` = 0x040E

      CMPSS5 clock.

    enumerator `SYSCTL_PERIPH_CLK_CMPSS6` = 0x050E

      CMPSS6 clock.

    enumerator `SYSCTL_PERIPH_CLK_CMPSS7` = 0x060E

      CMPSS7 clock.

    enumerator `SYSCTL_PERIPH_CLK_PGA1` = 0x000F

      PGA1 clock.

    enumerator `SYSCTL_PERIPH_CLK_PGA2` = 0x010F

      PGA2 clock.

    enumerator `SYSCTL_PERIPH_CLK_PGA3` = 0x020F

      PGA3 clock.

    enumerator `SYSCTL_PERIPH_CLK_PGA4` = 0x030F

      PGA4 clock.

    enumerator `SYSCTL_PERIPH_CLK_PGA5` = 0x040F

      PGA5 clock.

    enumerator `SYSCTL_PERIPH_CLK_PGA6` = 0x050F

      PGA6 clock.

    enumerator `SYSCTL_PERIPH_CLK_PGA7` = 0x060F

      PGA7 clock.

    enumerator `SYSCTL_PERIPH_CLK_DACA` = 0x1010

      DAC_A clock.

    enumerator `SYSCTL_PERIPH_CLK_DACB` = 0x1110

      DAC_B clock.

    enumerator `SYSCTL_PERIPH_CLK_CLB1` = 0x0011

      CLB1 clock.

    enumerator `SYSCTL_PERIPH_CLK_CLB2` = 0x0111

      CLB2 clock.

    enumerator `SYSCTL_PERIPH_CLK_CLB3` = 0x0211

      CLB3 clock.

    enumerator `SYSCTL_PERIPH_CLK_CLB4` = 0x0311

      CLB4 clock.

    enumerator `SYSCTL_PERIPH_CLK_FSITXA` = 0x0012

      FSITX_A clock.

    enumerator `SYSCTL_PERIPH_CLK_FSIRXA` = 0x0112

      FSIRX_A clock.

    enumerator `SYSCTL_PERIPH_CLK_LINA` = 0x0013

      LIN_A clock.

    enumerator `SYSCTL_PERIPH_CLK_PMBUSA` = 0x0014

      PMBUS_A clock.

    enumerator `SYSCTL_PERIPH_CLK_DCC0` = 0x0015

      DCC_0 clock.

  enum `SysCtl_PeripheralSOFTPRES`

    The following are values that can be passed to SysCtl_resetPeripheral() as the peripheral parameter.

    Values:

    enumerator `SYSCTL_PERIPH_RES_CPU1CLA1` = 0x0000

      Reset CPU1_CLA1 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM1` = 0x0002

      Reset EPWM1 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM2` = 0x0102

      Reset EPWM2 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM3` = 0x0202

      Reset EPWM3 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM4` = 0x0302

      Reset EPWM4 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM5` = 0x0402

      Reset EPWM5 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM6` = 0x0502

      Reset EPWM6 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM7` = 0x0602

      Reset EPWM7 clock.

    enumerator `SYSCTL_PERIPH_RES_EPWM8` = 0x0702

      Reset EPWM8 clock.

    enumerator `SYSCTL_PERIPH_RES_ECAP1` = 0x0003

      Reset ECAP1 clock.

    enumerator `SYSCTL_PERIPH_RES_ECAP2` = 0x0103

      Reset ECAP2 clock.

    enumerator `SYSCTL_PERIPH_RES_ECAP3` = 0x0203

      Reset ECAP3 clock.

    enumerator `SYSCTL_PERIPH_RES_ECAP4` = 0x0303

      Reset ECAP4 clock.

    enumerator `SYSCTL_PERIPH_RES_ECAP5` = 0x0403

      Reset ECAP5 clock.

    enumerator `SYSCTL_PERIPH_RES_ECAP6` = 0x0503

      Reset ECAP6 clock.

    enumerator `SYSCTL_PERIPH_RES_ECAP7` = 0x0603

      Reset ECAP7 clock.

    enumerator `SYSCTL_PERIPH_RES_EQEP1` = 0x0004

      Reset EQEP1 clock.

    enumerator `SYSCTL_PERIPH_RES_EQEP2` = 0x0104

      Reset EQEP2 clock.

    enumerator `SYSCTL_PERIPH_RES_SD1` = 0x0006

      Reset SD1 clock.

    enumerator `SYSCTL_PERIPH_RES_SCIA` = 0x0007

      Reset SCI_A clock.

    enumerator `SYSCTL_PERIPH_RES_SCIB` = 0x0107

      Reset SCI_B clock.

    enumerator `SYSCTL_PERIPH_RES_SPIA` = 0x0008

      Reset SPI_A clock.

    enumerator `SYSCTL_PERIPH_RES_SPIB` = 0x0108

      Reset SPI_B clock.

    enumerator `SYSCTL_PERIPH_RES_I2CA` = 0x0009

      Reset I2C_A clock.

    enumerator `SYSCTL_PERIPH_RES_CANA` = 0x000A

      Reset CAN_A clock.

    enumerator `SYSCTL_PERIPH_RES_CANB` = 0x010A

      Reset CAN_B clock.

    enumerator `SYSCTL_PERIPH_RES_ADCA` = 0x000D

      Reset ADC_A clock.

    enumerator `SYSCTL_PERIPH_RES_ADCB` = 0x010D

      Reset ADC_B clock.

    enumerator `SYSCTL_PERIPH_RES_ADCC` = 0x020D

      Reset ADC_C clock.

    enumerator `SYSCTL_PERIPH_RES_CMPSS1` = 0x000E

      Reset CMPSS1 clock.

    enumerator `SYSCTL_PERIPH_RES_CMPSS2` = 0x010E

      Reset CMPSS2 clock.

    enumerator `SYSCTL_PERIPH_RES_CMPSS3` = 0x020E

      Reset CMPSS3 clock.

    enumerator `SYSCTL_PERIPH_RES_CMPSS4` = 0x030E

      Reset CMPSS4 clock.

    enumerator `SYSCTL_PERIPH_RES_CMPSS5` = 0x040E

      Reset CMPSS5 clock.

    enumerator `SYSCTL_PERIPH_RES_CMPSS6` = 0x050E

      Reset CMPSS6 clock.

    enumerator `SYSCTL_PERIPH_RES_CMPSS7` = 0x060E

      Reset CMPSS7 clock.

    enumerator `SYSCTL_PERIPH_RES_PGA1` = 0x000F

      Reset PGA1 clock.

    enumerator `SYSCTL_PERIPH_RES_PGA2` = 0x010F

      Reset PGA2 clock.

    enumerator `SYSCTL_PERIPH_RES_PGA3` = 0x020F

      Reset PGA3 clock.

    enumerator `SYSCTL_PERIPH_RES_PGA4` = 0x030F

      Reset PGA4 clock.

    enumerator `SYSCTL_PERIPH_RES_PGA5` = 0x040F

      Reset PGA5 clock.

    enumerator `SYSCTL_PERIPH_RES_PGA6` = 0x050F

      Reset PGA6 clock.

    enumerator `SYSCTL_PERIPH_RES_PGA7` = 0x060F

      Reset PGA7 clock.

    enumerator `SYSCTL_PERIPH_RES_DACA` = 0x1010

      Reset DAC_A clock.

    enumerator `SYSCTL_PERIPH_RES_DACB` = 0x1110

      Reset DAC_B clock.

    enumerator `SYSCTL_PERIPH_RES_CLB1` = 0x0011

      Reset CLB1 clock.

    enumerator `SYSCTL_PERIPH_RES_CLB2` = 0x0111

      Reset CLB2 clock.

    enumerator `SYSCTL_PERIPH_RES_CLB3` = 0x0211

      Reset CLB3 clock.

    enumerator `SYSCTL_PERIPH_RES_CLB4` = 0x0311

      Reset CLB4 clock.

    enumerator `SYSCTL_PERIPH_RES_LINA` = 0x0013

      Reset LIN_A clock.

    enumerator `SYSCTL_PERIPH_RES_PMBUSA` = 0x0014

      Reset PMBUS_A clock.

  enum `SysCtl_WDPredivider`

    The following are values that can be passed to SysCtl_setWatchdogPredivider() as the predivider parameter.

    Values:

    enumerator `SYSCTL_WD_PREDIV_2` = 0x800

      PREDIVCLK = INTOSC1 / 2.

    enumerator `SYSCTL_WD_PREDIV_4` = 0x900

      PREDIVCLK = INTOSC1 / 4.

    enumerator `SYSCTL_WD_PREDIV_8` = 0xA00

      PREDIVCLK = INTOSC1 / 8.

    enumerator `SYSCTL_WD_PREDIV_16` = 0xB00

      PREDIVCLK = INTOSC1 / 16.

    enumerator `SYSCTL_WD_PREDIV_32` = 0xC00

      PREDIVCLK = INTOSC1 / 32.

    enumerator `SYSCTL_WD_PREDIV_64` = 0xD00

      PREDIVCLK = INTOSC1 / 64.

    enumerator `SYSCTL_WD_PREDIV_128` = 0xE00

      PREDIVCLK = INTOSC1 / 128.

    enumerator `SYSCTL_WD_PREDIV_256` = 0xF00

      PREDIVCLK = INTOSC1 / 256.

    enumerator `SYSCTL_WD_PREDIV_512` = 0x000

      PREDIVCLK = INTOSC1 / 512.

    enumerator `SYSCTL_WD_PREDIV_1024` = 0x100

      PREDIVCLK = INTOSC1 / 1024.

    enumerator `SYSCTL_WD_PREDIV_2048` = 0x200

      PREDIVCLK = INTOSC1 / 2048.

    enumerator `SYSCTL_WD_PREDIV_4096` = 0x300

      PREDIVCLK = INTOSC1 / 4096.

  enum `SysCtl_WDPrescaler`

    The following are values that can be passed to SysCtl_setWatchdogPrescaler() as the prescaler parameter.

    Values:

    enumerator `SYSCTL_WD_PRESCALE_1` = 1

      WDCLK = PREDIVCLK / 1.

    enumerator `SYSCTL_WD_PRESCALE_2` = 2

      WDCLK = PREDIVCLK / 2.

    enumerator `SYSCTL_WD_PRESCALE_4` = 3

      WDCLK = PREDIVCLK / 4.

    enumerator `SYSCTL_WD_PRESCALE_8` = 4

      WDCLK = PREDIVCLK / 8.

    enumerator `SYSCTL_WD_PRESCALE_16` = 5

      WDCLK = PREDIVCLK / 16.

    enumerator `SYSCTL_WD_PRESCALE_32` = 6

      WDCLK = PREDIVCLK / 32.

    enumerator `SYSCTL_WD_PRESCALE_64` = 7

      WDCLK = PREDIVCLK / 64.

  enum `SysCtl_WDMode`

    The following are values that can be passed to SysCtl_setWatchdogMode() as the prescaler parameter.

    Values:

    enumerator `SYSCTL_WD_MODE_RESET`

      Watchdog can generate a reset signal.

    enumerator `SYSCTL_WD_MODE_INTERRUPT`

      Watchdog can generate an interrupt signal; reset signal is disabled.

  enum `SysCtl_LSPCLKPrescaler`

    The following are values that can be passed to SysCtl_setLowSpeedClock() as the prescaler parameter.

    Values:

    enumerator `SYSCTL_LSPCLK_PRESCALE_1` = 0

      LSPCLK = SYSCLK / 1.

    enumerator `SYSCTL_LSPCLK_PRESCALE_2` = 1

      LSPCLK = SYSCLK / 2.

    enumerator `SYSCTL_LSPCLK_PRESCALE_4` = 2

      LSPCLK = SYSCLK / 4 (default)

    enumerator `SYSCTL_LSPCLK_PRESCALE_6` = 3

      LSPCLK = SYSCLK / 6.

    enumerator `SYSCTL_LSPCLK_PRESCALE_8` = 4

      LSPCLK = SYSCLK / 8.

    enumerator `SYSCTL_LSPCLK_PRESCALE_10` = 5

      LSPCLK = SYSCLK / 10.

    enumerator `SYSCTL_LSPCLK_PRESCALE_12` = 6

      LSPCLK = SYSCLK / 12.

    enumerator `SYSCTL_LSPCLK_PRESCALE_14` = 7

      LSPCLK = SYSCLK / 14.

  enum `SysCtl_AccessPeripheral`

    The following are values that can be passed to SysCtl_setPeripheralAccessControl() and SysCtl_getPeripheralAccessControl() as the peripheral parameter.

    Values:

    enumerator `SYSCTL_ACCESS_ADCA` = 0x0

      ADCA access.

    enumerator `SYSCTL_ACCESS_ADCB` = 0x2

      ADCB access.

    enumerator `SYSCTL_ACCESS_ADCC` = 0x4

      ADCC access.

    enumerator `SYSCTL_ACCESS_CMPSS1` = 0x10

      CMPSS1 access.

    enumerator `SYSCTL_ACCESS_CMPSS2` = 0x12

      CMPSS2 access.

    enumerator `SYSCTL_ACCESS_CMPSS3` = 0x14

      CMPSS3 access.

    enumerator `SYSCTL_ACCESS_CMPSS4` = 0x16

      CMPSS4 access.

    enumerator `SYSCTL_ACCESS_CMPSS5` = 0x18

      CMPSS5 access.

    enumerator `SYSCTL_ACCESS_CMPSS6` = 0x1A

      CMPSS6 access.

    enumerator `SYSCTL_ACCESS_CMPSS7` = 0x1C

      CMPSS7 access.

    enumerator `SYSCTL_ACCESS_DACA` = 0x28

      DACA access.

    enumerator `SYSCTL_ACCESS_DACB` = 0x2A

      DACB access.

    enumerator `SYSCTL_ACCESS_PGA1` = 0x38

      PGA1 access.

    enumerator `SYSCTL_ACCESS_PGA2` = 0x3A

      PGA2 access.

    enumerator `SYSCTL_ACCESS_PGA3` = 0x3C

      PGA3 access.

    enumerator `SYSCTL_ACCESS_PGA4` = 0x3E

      PGA4 access.

    enumerator `SYSCTL_ACCESS_PGA5` = 0x40

      PGA5 access.

    enumerator `SYSCTL_ACCESS_PGA6` = 0x42

      PGA6 access.

    enumerator `SYSCTL_ACCESS_PGA7` = 0x44

      PGA7 access.

    enumerator `SYSCTL_ACCESS_EPWM1` = 0x48

      EPWM1 access.

    enumerator `SYSCTL_ACCESS_EPWM2` = 0x4A

      EPWM2 access.

    enumerator `SYSCTL_ACCESS_EPWM3` = 0x4C

      EPWM3 access.

    enumerator `SYSCTL_ACCESS_EPWM4` = 0x4E

      EPWM4 access.

    enumerator `SYSCTL_ACCESS_EPWM5` = 0x50

      EPWM5 access.

    enumerator `SYSCTL_ACCESS_EPWM6` = 0x52

      EPWM6 access.

    enumerator `SYSCTL_ACCESS_EPWM7` = 0x54

      EPWM7 access.

    enumerator `SYSCTL_ACCESS_EPWM8` = 0x56

      EPWM8 access.

    enumerator `SYSCTL_ACCESS_EQEP1` = 0x70

      EQEP1 access.

    enumerator `SYSCTL_ACCESS_EQEP2` = 0x72

      EQEP2 access.

    enumerator `SYSCTL_ACCESS_ECAP1` = 0x80

      ECAP1 access.

    enumerator `SYSCTL_ACCESS_ECAP2` = 0x82

      ECAP2 access.

    enumerator `SYSCTL_ACCESS_ECAP3` = 0x84

      ECAP3 access.

    enumerator `SYSCTL_ACCESS_ECAP4` = 0x86

      ECAP4 access.

    enumerator `SYSCTL_ACCESS_ECAP5` = 0x88

      ECAP5 access.

    enumerator `SYSCTL_ACCESS_ECAP6` = 0x8A

      ECAP6 access.

    enumerator `SYSCTL_ACCESS_ECAP7` = 0x8C

      ECAP7 access.

    enumerator `SYSCTL_ACCESS_SDFM1` = 0xA8

      SDFM1 access.

    enumerator `SYSCTL_ACCESS_CLB1` = 0xB0

      CLB1 access.

    enumerator `SYSCTL_ACCESS_CLB2` = 0xB2

      CLB2 access.

    enumerator `SYSCTL_ACCESS_CLB3` = 0xB4

      CLB3 access.

    enumerator `SYSCTL_ACCESS_CLB4` = 0xB6

      CLB4 access.

    enumerator `SYSCTL_ACCESS_CLA1PROMCRC` = 0xC0

      CLA1PROMCRC access.

    enumerator `SYSCTL_ACCESS_SPIA` = 0x110

      SPIA access.

    enumerator `SYSCTL_ACCESS_SPIB` = 0x112

      SPIB access.

    enumerator `SYSCTL_ACCESS_PMBUSA` = 0x130

      PMBUS_A access.

    enumerator `SYSCTL_ACCESS_LINA` = 0x138

      LIN_A access.

    enumerator `SYSCTL_ACCESS_CANA` = 0x140

      DCANA access.

    enumerator `SYSCTL_ACCESS_CANB` = 0x142

      DCANB access.

    enumerator `SYSCTL_ACCESS_FSIATX` = 0x158

      FSIATX access.

    enumerator `SYSCTL_ACCESS_FSIARX` = 0x15A

      FSIARX access.

    enumerator `SYSCTL_ACCESS_HRPWMA` = 0x1AA

      HRPWM_A access.

  enum `SysCtl_AccessMaster`

    The following are values that can be passed to SysCtl_setPeripheralAccessControl() and SysCtl_getPeripheralAccessControl() as the master parameter.

    Values:

    enumerator `SYSCTL_ACCESS_CPU1` = 0U

      CPU access to the peripheral.

    enumerator `SYSCTL_ACCESS_CLA1` = 2U

      CLA1 access to the peripheral.

    enumerator `SYSCTL_ACCESS_DMA1` = 4U

      DMA access to the peripheral.

  enum `SysCtl_AccessPermission`

    The following are values that can be passed to SysCtl_setPeripheralAccessControl() as the permission parameter.

    Values:

    enumerator `SYSCTL_ACCESS_FULL` = 3U

      Full Access for both read and write.

    enumerator `SYSCTL_ACCESS_PROTECTED` = 2U

      Protected RD access such that FIFOs. Clear on read, registers are not changed and no write access.

    enumerator `SYSCTL_ACCESS_NONE` = 0U

      No read or write access.

  enum `SysCtl_ClockOut`

    The following are values that can be passed to SysCtl_selectClockOutSource() as the source parameter.

    Values:

    enumerator `SYSCTL_CLOCKOUT_PLLSYS` = 0U

      PLL System Clock post SYSCLKDIV.

    enumerator `SYSCTL_CLOCKOUT_PLLRAW` = 1U

      PLL Raw Clock.

    enumerator `SYSCTL_CLOCKOUT_SYSCLK` = 2U

      CPU System Clock.

    enumerator `SYSCTL_CLOCKOUT_INTOSC1` = 5U

      Internal Oscillator 1.

    enumerator `SYSCTL_CLOCKOUT_INTOSC2` = 6U

      Internal Oscillator 2.

    enumerator `SYSCTL_CLOCKOUT_XTALOSC` = 7U

      External Oscillator.

  enum `SysCtl_ExternalOscMode`

    The following are values that can be passed to SysCtl_setExternalOscMode() as the mode parameter.

    Values:

    enumerator `SYSCTL_XTALMODE_CRYSTAL` = 1U

      XTAL Oscillator Crystal Mode.

    enumerator `SYSCTL_XTALMODE_SINGLE` = 2U

      XTAL Oscillator Single-Ended Mode.

  enum `SysCtl_SyncInput`

    The following values define the syncInput parameter for SysCtl_setSyncInputConfig().

    Values:

    enumerator `SYSCTL_SYNC_IN_EPWM4` = 0

      Sync input to EPWM4.

    enumerator `SYSCTL_SYNC_IN_EPWM7` = 3

      Sync input to EPWM7.

    enumerator `SYSCTL_SYNC_IN_ECAP1` = 9

      Sync input to ECAP1.

    enumerator `SYSCTL_SYNC_IN_ECAP4` = 12

      Sync input to ECAP4.

    enumerator `SYSCTL_SYNC_IN_ECAP6` = 15

      Sync input to ECAP6.

    enumerator `SYSCTL_SYNC_IN_EPWM1` = 29

      Sync input to EPWM1.

  enum `SysCtl_SyncInputSource`

    The following values define the syncSrc parameter for SysCtl_setSyncInputConfig(). Note that some of these are only valid for certain values of syncInput. See device technical reference manual for info on time-base counter synchronization for details.

    Values:

    enumerator `SYSCTL_SYNC_IN_SRC_EPWM1SYNCOUT` = 0

      EPWM1SYNCOUT.

    enumerator `SYSCTL_SYNC_IN_SRC_EPWM4SYNCOUT` = 1

      EPWM4SYNCOUT.

    enumerator `SYSCTL_SYNC_IN_SRC_EPWM7SYNCOUT` = 2

      EPWM7SYNCOUT.

    enumerator `SYSCTL_SYNC_IN_SRC_ECAP1SYNCOUT` = 4

      ECAP1SYNCOUT.

    enumerator `SYSCTL_SYNC_IN_SRC_EXTSYNCIN1` = 5

      EXTSYNCIN1Valid for all values of syncInput.

    enumerator `SYSCTL_SYNC_IN_SRC_EXTSYNCIN2` = 6

      EXTSYNCIN2Valid for all values of syncInput.

  enum `SysCtl_SyncOutputSource`

    The following values define the syncSrc parameter for SysCtl_setSyncOutputConfig().

    Values:

    enumerator `SYSCTL_SYNC_OUT_SRC_EPWM1SYNCOUT`

      EPWM1SYNCOUT –> EXTSYNCOUT.

    enumerator `SYSCTL_SYNC_OUT_SRC_EPWM4SYNCOUT`

      EPWM4SYNCOUT –> EXTSYNCOUT.

    enumerator `SYSCTL_SYNC_OUT_SRC_EPWM7SYNCOUT`

      EPWM7SYNCOUT –> EXTSYNCOUT.

  enum `SysCtl_DeviceParametric`

    The following values define the parametric parameter for SysCtl_getDeviceParametric().

    Values:

    enumerator `SYSCTL_DEVICE_QUAL`

      Device Qualification Status.

    enumerator `SYSCTL_DEVICE_PINCOUNT`

      Device Pin Count.

    enumerator `SYSCTL_DEVICE_INSTASPIN`

      Device InstaSPIN Feature Set.

    enumerator `SYSCTL_DEVICE_FLASH`

      Device Flash size (KB)

    enumerator `SYSCTL_DEVICE_FAMILY`

      Device Family.

    enumerator `SYSCTL_DEVICE_PARTNO`

      Device Part Number.

    enumerator `SYSCTL_DEVICE_CLASSID`

      Device Class ID.

  enum `SysCtl_XClkDivider`

    The following are values that can be passed to SysCtl_setXClk() as divider parameter.

    Values:

    enumerator `SYSCTL_XCLKOUT_DIV_1` = 0

      XCLKOUT = XCLKOUT / 1.

    enumerator `SYSCTL_XCLKOUT_DIV_2` = 1

      XCLKOUT = XCLKOUT / 2.

    enumerator `SYSCTL_XCLKOUT_DIV_4` = 2

      XCLKOUT = XCLKOUT / 4.

    enumerator `SYSCTL_XCLKOUT_DIV_8` = 3

      XCLKOUT = XCLKOUT / 8.

  enum `SysCtl_Cputimer2ClkDivider`

    The following are values that can be passed to SysCtl_setCputimer2Clk() as divider parameter.

    Values:

    enumerator `SYSCTL_TMR2CLKPRESCALE_1`

      Cputimer2 clock = Cputimer2 clock / 1.

    enumerator `SYSCTL_TMR2CLKPRESCALE_2`

      Cputimer2 clock = Cputimer2 clock / 2.

    enumerator `SYSCTL_TMR2CLKPRESCALE_4`

      Cputimer2 clock = Cputimer2 clock / 4.

    enumerator `SYSCTL_TMR2CLKPRESCALE_8`

      Cputimer2 clock = Cputimer2 clock / 8.

    enumerator `SYSCTL_TMR2CLKPRESCALE_16`

      Cputimer2 clock = Cputimer2 clock / 16.

  enum `SysCtl_Cputimer2ClkSource`

    The following are values that can be passed to SysCtl_setCputimer2Clk() as source parameter.

    Values:

    enumerator `SYSCTL_TMR2CLKSRCSEL_SYSCLK` = 0U

      System Clock.

    enumerator `SYSCTL_TMR2CLKSRCSEL_INTOSC1` = 1U

      Internal Oscillator 1.

    enumerator `SYSCTL_TMR2CLKSRCSEL_INTOSC2` = 2U

      Internal Oscillator 2.

    enumerator `SYSCTL_TMR2CLKSRCSEL_XTAL` = 3U

      Crystal oscillator.

    enumerator `SYSCTL_TMR2CLKSRCSEL_AUXPLLCLK` = 6U

      Aux PLL CLock.

  Functions

  void `SysCtl_deviceCal`(void)

    Wrapper function for Device_cal function

    Return

      None.

    Parameters

      - `None`: This is a wrapper function for the Device_cal function available in the OTP memory. The function saves and restores the core registers which are being used by the Device_cal function

  void `SysCtl_resetPeripheral`(SysCtl_PeripheralSOFTPRES peripheral)

    Resets a peripheral

    This function uses the SOFTPRESx registers to reset a specified peripheral. Module registers will be returned to their reset states.

    Parameters

      - `peripheral`: is the peripheral to reset.

    Note

      This includes registers containing trim values.The peripheral software reset needed by CPU2 can be communicated to CPU1 via IPC for all shared peripherals.

    Return

      None.

  void `SysCtl_enablePeripheral`(SysCtl_PeripheralPCLOCKCR peripheral)

    Enables a peripheral.

    Peripherals are enabled with this function. At power-up, all peripherals are disabled; they must be enabled in order to operate or respond to register reads/writes.

    Parameters

      - `peripheral`: is the peripheral to enable.

    Note

      Note that there should be atleast 5 cycles delay between enabling the peripheral clock and accessing the peripheral registers. The delay should be added by the user if the peripheral is accessed immediately after this function call. Use asm(” RPT #5 || NOP”); to add 5 cycle delay post this function call.

    Return

      None.

  void `SysCtl_disablePeripheral`(SysCtl_PeripheralPCLOCKCR peripheral)

    Disables a peripheral.

    Peripherals are disabled with this function. Once disabled, they will not operate or respond to register reads/writes.

    Parameters

      - `peripheral`: is the peripheral to disable.

    Return

      None.

  void `SysCtl_resetDevice`(void)

    Resets the device.

    This function performs a watchdog reset of the device.

    Return

      This function does not return.

  uint32_t `SysCtl_getResetCause`(void)

    Gets the reason for a reset.

    This function will return the reason(s) for a reset. Since the reset reasons are sticky until either cleared by software or an external reset, multiple reset reasons may be returned if multiple resets have occurred. The reset reason will be a logical OR of

    - SYSCTL_CAUSE_POR - Power-on reset

    - SYSCTL_CAUSE_XRS - External reset pin

    - SYSCTL_CAUSE_WDRS - Watchdog reset

    - SYSCTL_CAUSE_NMIWDRS - NMI watchdog reset

    - SYSCTL_CAUSE_SCCRESET - SCCRESETn reset from DCSM

    Note

      If you re-purpose the reserved boot ROM RAM, the POR and XRS reset statuses won’t be accurate.

    Return

      Returns the reason(s) for a reset.

  void `SysCtl_clearResetCause`(uint32_t rstCauses)

    Clears reset reasons.

    This function clears the specified sticky reset reasons. Once cleared, another reset for the same reason can be detected, and a reset for a different reason can be distinguished (instead of having two reset causes set). If the reset reason is used by an application, all reset causes should be cleared after they are retrieved with

    SysCtl_getResetCause().
    Parameters

      - `rstCauses`: are the reset causes to be cleared; must be a logical OR of SYSCTL_CAUSE_POR, SYSCTL_CAUSE_XRS, SYSCTL_CAUSE_WDRS, SYSCTL_CAUSE_NMIWDRS, and/or SYSCTL_CAUSE_SCCRESET.

    Note

      Some reset causes are cleared by the boot ROM.

    Return

      None.

  void `SysCtl_setLowSpeedClock`(SysCtl_LSPCLKPrescaler prescaler)

    Sets the low speed peripheral clock rate prescaler.

    This function configures the clock rate of the low speed peripherals. The

    prescaler parameter is the value by which the SYSCLK rate is divided to get the LSPCLK rate. For example, a prescaler of SYSCTL_LSPCLK_PRESCALE_4 will result in a LSPCLK rate that is a quarter of the SYSCLK rate.
    Parameters

      - `prescaler`: is the LSPCLK rate relative to SYSCLK

    Return

      None.

  void `SysCtl_selectClockOutSource`(SysCtl_ClockOut source)

    Selects a clock source to mux to an external GPIO pin (XCLKOUT).

    This function configures the specified clock source to be muxed to an external clock out (XCLKOUT) GPIO pin. The

    source parameter may take a value of one of the following values:

    - SYSCTL_CLOCKOUT_PLLSYS

    - SYSCTL_CLOCKOUT_PLLRAW

    - SYSCTL_CLOCKOUT_SYSCLK

    - SYSCTL_CLOCKOUT_INTOSC1

    - SYSCTL_CLOCKOUT_INTOSC2

    - SYSCTL_CLOCKOUT_XTALOSC

    Parameters

      - `source`: is the internal clock source to be configured.

    Return

      None.

  void `SysCtl_setExternalOscMode`(SysCtl_ExternalOscMode mode)

    Set the external oscillator mode.

    This function sets the external oscillator mode specified by the

    mode parameter which may take one of two values:

    - SYSCTL_XTALMODE_CRYSTAL - Crystal Mode

    - SYSCTL_XTALMODE_SINGLE - Single-Ended Mode

    Parameters

      - `mode`: is the external oscillator mode to be configured.

    Note

      The external oscillator must be powered off before this configuration can be performed.

    Return

      None.

  uint16_t `SysCtl_getExternalOscCounterValue`(void)

    Gets the external oscillator counter value.

    This function returns the X1 clock counter value. When the return value reaches 0x3FF, it freezes. Before switching from INTOSC2 to an external oscillator (XTAL), an application should call this function to make sure the counter is saturated.

    Return

      Returns the value of the 10-bit X1 clock counter.

  void `SysCtl_clearExternalOscCounterValue`(void)

    Clears the external oscillator counter value.

    Return

      None.

  void `SysCtl_turnOnOsc`(uint32_t oscSource)

    Turns on the specified oscillator sources.

    This function turns on the oscillator specified by the

    oscSource parameter which may take a value of SYSCTL_OSCSRC_XTAL or SYSCTL_OSCSRC_OSC2.
    Parameters

      - `oscSource`: is the oscillator source to be configured.

    Note

      SYSCTL_OSCSRC_OSC1 is not a valid value for oscSource.

    Return

      None.

  void `SysCtl_turnOffOsc`(uint32_t oscSource)

    Turns off the specified oscillator sources.

    This function turns off the oscillator specified by the

    oscSource parameter which may take a value of SYSCTL_OSCSRC_XTAL or SYSCTL_OSCSRC_OSC2.
    Parameters

      - `oscSource`: is the oscillator source to be configured.

    Note

      SYSCTL_OSCSRC_OSC1 is not a valid value for oscSource.

    Return

      None.

  void `SysCtl_enterIdleMode`(void)

    Enters IDLE mode.

    This function puts the device into IDLE mode. The CPU clock is gated while all peripheral clocks are left running. Any enabled interrupt will wake the CPU up from IDLE mode.

    Return

      None.

  void `SysCtl_enterHaltMode`(void)

    Enters HALT mode.

    This function puts the device into HALT mode. This will gate almost all systems and clocks and allows for the power-down of oscillators and analog blocks. The watchdog may be left clocked to produce a reset. See SysCtl_enableWatchdogInHalt() to enable this. GPIOs should be configured to wake the CPU subsystem. See SysCtl_enableLPMWakeupPin().

    The CPU will receive an interrupt (WAKEINT) on wakeup.

    Return

      None.

  void `SysCtl_enableLPMWakeupPin`(uint32_t pin)

    Enables a pin to wake up the device from the following mode(s):

    - HALT

    This function connects a pin to the LPM circuit, allowing an event on the pin to wake up the device when when it is in following mode(s):

    - HALT

    Parameters

      - `pin`: is the identifying number of the pin.

    The pin is specified by its numerical value. For example, GPIO34 is specified by passing 34 as pin. Only GPIOs 0 through 63 are capable of being connected to the LPM circuit.

    Return

      None.

  void `SysCtl_disableLPMWakeupPin`(uint32_t pin)

    Disables a pin to wake up the device from the following mode(s):

    - HALT

    This function disconnects a pin to the LPM circuit, disallowing an event on the pin to wake up the device when when it is in following mode(s):

    - HALT

    Parameters

      - `pin`: is the identifying number of the pin.

    The pin is specified by its numerical value. For example, GPIO34 is specified by passing 34 as pin. Only GPIOs 0 through 63 are valid.

    Return

      None.

  void `SysCtl_enableWatchdogInHalt`(void)

    Enable the watchdog to run while in HALT mode.

    This function configures the watchdog to continue to run while in HALT mode. Additionally, INTOSC1 and INTOSC2 are not powered down when the system enters HALT mode. By default the watchdog is gated when the system enters HALT.

    Return

      None.

  void `SysCtl_disableWatchdogInHalt`(void)

    Disable the watchdog from running while in HALT mode.

    This function gates the watchdog when the system enters HALT mode. INTOSC1 and INTOSC2 will be powered down. This is the default behavior of the device.

    Return

      None.

  void `SysCtl_setWatchdogMode`(SysCtl_WDMode mode)

    Configures whether the watchdog generates a reset or an interrupt signal.

    This function configures the action taken when the watchdog counter reaches its maximum value. When the

    mode parameter is SYSCTL_WD_MODE_INTERRUPT, the watchdog is enabled to generate a watchdog interrupt signal and disables the generation of a reset signal. This will allow the watchdog module to wake up the device from IDLE
    Parameters

      - `mode`: is a flag to select the watchdog mode.

    When the mode parameter is SYSCTL_WD_MODE_RESET, the watchdog will be put into reset mode and generation of a watchdog interrupt signal will be disabled. This is how the watchdog is configured by default.

    Note

      Check the status of the watchdog interrupt using SysCtl_isWatchdogInterruptActive() before calling this function. If the interrupt is still active, switching from interrupt mode to reset mode will immediately reset the device.

    Return

      None.

  bool `SysCtl_isWatchdogInterruptActive`(void)

    Gets the status of the watchdog interrupt signal.

    This function returns the status of the watchdog interrupt signal. If the interrupt is active, this function will return true. If false, the interrupt is NOT active.

    Note

      Make sure to call this function to ensure that the interrupt is not active before making any changes to the configuration of the watchdog to prevent any unexpected behavior. For instance, switching from interrupt mode to reset mode while the interrupt is active will immediately reset the device.

    Return

      true if the interrupt is active and false if it is not.

  void `SysCtl_disableWatchdog`(void)

    Disables the watchdog.

    This function disables the watchdog timer. Note that the watchdog timer is enabled on reset.

    Return

      None.

  void `SysCtl_enableWatchdog`(void)

    Enables the watchdog.

    This function enables the watchdog timer. Note that the watchdog timer is enabled on reset.

    Return

      None.

  void `SysCtl_serviceWatchdog`(void)

    Services the watchdog.

    This function resets the watchdog.

    Return

      None.

  void `SysCtl_enableWatchdogReset`(void)

    Writes the first key to enter the watchdog reset.

    This function writes the first key to enter the watchdog reset.

    Return

      None.

  void `SysCtl_resetWatchdog`(void)

    Writes the second key to reset the watchdog.

    This function writes the second key to reset the watchdog.

    Return

      None.

  void `SysCtl_setWatchdogPredivider`(SysCtl_WDPredivider predivider)

    Sets up watchdog clock (WDCLK) pre-divider.

    This function sets up the watchdog clock (WDCLK) pre-divider. There are two dividers that scale INTOSC1 to WDCLK. The

    predivider parameter divides INTOSC1 down to PREDIVCLK and the prescaler (set by the SysCtl_setWatchdogPrescaler() function) divides PREDIVCLK down to WDCLK.
    Parameters

      - `predivider`: is the value that configures the pre-divider.

    Return

      None.

  void `SysCtl_setWatchdogPrescaler`(SysCtl_WDPrescaler prescaler)

    Sets up watchdog clock (WDCLK) prescaler.

    This function sets up the watchdog clock (WDCLK) prescaler. There are two dividers that scale INTOSC1 to WDCLK. The predivider (set with the

    SysCtl_setWatchdogPredivider() function) divides INTOSC1 down to PREDIVCLK and the prescaler parameter divides PREDIVCLK down to WDCLK.
    Parameters

      - `prescaler`: is the value that configures the watchdog clock relative to the value from the pre-divider.

    Return

      None.

  uint16_t `SysCtl_getWatchdogCounterValue`(void)

    Gets the watchdog counter value.

    Return

      Returns the current value of the 8-bit watchdog counter. If this count value overflows, a watchdog output pulse is generated.

  bool `SysCtl_getWatchdogResetStatus`(void)

    Gets the watchdog reset status.

    This function returns the watchdog reset status. If this function returns true, that indicates that a watchdog reset generated the last reset condition. Otherwise, it was an external device or power-up reset condition.

    Return

      Returns true if the watchdog generated the last reset condition.

  void `SysCtl_clearWatchdogResetStatus`(void)

    Clears the watchdog reset status.

    This function clears the watchdog reset status. To check if it was set first, see SysCtl_getWatchdogResetStatus().

    Return

      None.

  void `SysCtl_setWatchdogWindowValue`(uint16_t value)

    Set the minimum threshold value for windowed watchdog

    This function sets the minimum threshold value used to define the lower limit of the windowed watchdog functionality.

    Parameters

      - `value`: is the value to set the window threshold

    Return

      None.

  void `SysCtl_clearWatchdogOverride`(void)

    Clears the watchdog override.

    This function clears the watchdog override and locks the watchdog timer module to remain in its prior state which could be either enable /disable. The watchdog timer will remain in this state until the next system reset.

    Return

      None.

  void `SysCtl_enableNMIGlobalInterrupt`(void)

    Enable the NMI Global interrupt bit

    Note: This bit should be set after the device security related initialization is complete.

    Return

      None.

  bool `SysCtl_getNMIStatus`(void)

    Read NMI interrupts.

    Read the current state of NMI interrupt.

    Return

      true if NMI interrupt is triggered, false if not.

  uint16_t `SysCtl_getNMIFlagStatus`(void)

    Read NMI Flags.

    Read the current state of individual NMI interrupts

    Return

      Value of NMIFLG register. These defines are provided to decode the value:

      - SYSCTL_NMI_NMIINT - NMI Interrupt Flag

      - SYSCTL_NMI_CLOCKFAIL - Clock Fail Interrupt Flag

      - SYSCTL_NMI_RAMUNCERR - RAM Uncorrectable Error NMI Flag

      - SYSCTL_NMI_FLUNCERR - Flash Uncorrectable Error NMI Flag

      - SYSCTL_NMI_PIEVECTERR - PIE Vector Fetch Error Flag

      - SYSCTL_NMI_CLBNMI - Configurable Logic Block NMI Flag

      - SYSCTL_NMI_SWERR - SW Error Force NMI Flag

  bool `SysCtl_isNMIFlagSet`(uint32_t nmiFlags)

    Check if the individual NMI interrupts are set.

    Check if interrupt flags corresponding to the passed in bit mask are asserted.

    Parameters

      - `nmiFlags`: Bit mask of the NMI interrupts that user wants to clear. The bit format of this parameter is same as of the NMIFLG register. These defines are provided:

        - SYSCTL_NMI_NMIINT - NMI Interrupt Flag

        - SYSCTL_NMI_CLOCKFAIL - Clock Fail Interrupt Flag

        - SYSCTL_NMI_RAMUNCERR - RAM Uncorrectable Error NMI Flag

        - SYSCTL_NMI_FLUNCERR - Flash Uncorrectable Error NMI Flag

        - SYSCTL_NMI_PIEVECTERR - PIE Vector Fetch Error Flag

        - SYSCTL_NMI_CLBNMI - Configurable Logic Block NMI Flag

        - SYSCTL_NMI_SWERR - SW Error Force NMI Flag

    Return

      true if any of the NMI asked for in the parameter bit mask is set. false if none of the NMI requested in the parameter bit mask are set.

  void `SysCtl_clearNMIStatus`(uint32_t nmiFlags)

    Function to clear individual NMI interrupts.

    Clear NMI interrupt flags that correspond with the passed in bit mask.

    Parameters

      - `nmiFlags`: Bit mask of the NMI interrupts that user wants to clear. The bit format of this parameter is same as of the NMIFLG register. These defines are provided:

        - SYSCTL_NMI_NMIINT - NMI Interrupt Flag

        - SYSCTL_NMI_CLOCKFAIL - Clock Fail Interrupt Flag

        - SYSCTL_NMI_RAMUNCERR - RAM Uncorrectable Error NMI Flag

        - SYSCTL_NMI_FLUNCERR - Flash Uncorrectable Error NMI Flag

        - SYSCTL_NMI_PIEVECTERR - PIE Vector Fetch Error Flag

        - SYSCTL_NMI_CLBNMI - Configurable Logic Block NMI Flag

        - SYSCTL_NMI_SWERR - SW Error Force NMI Flag

    Note: The NMI Interrupt flag is always cleared by default and therefore doesn’t have to be included in the bit mask.

    Return

      None.

  void `SysCtl_clearAllNMIFlags`(void)

    Clear all the NMI Flags that are currently set.

    Return

      None.

  void `SysCtl_forceNMIFlags`(uint32_t nmiFlags)

    Function to force individual NMI interrupt fail flags

    Return

      None.

    Parameters

      - `nmiFlags`: Bit mask of the NMI interrupts that user wants to clear. The bit format of this parameter is same as of the NMIFLG register. These defines are provided:

        - SYSCTL_NMI_NMIINT - NMI Interrupt Flag

        - SYSCTL_NMI_CLOCKFAIL - Clock Fail Interrupt Flag

        - SYSCTL_NMI_RAMUNCERR - RAM Uncorrectable Error NMI Flag

        - SYSCTL_NMI_FLUNCERR - Flash Uncorrectable Error NMI Flag

        - SYSCTL_NMI_PIEVECTERR - PIE Vector Fetch Error Flag

        - SYSCTL_NMI_CLBNMI - Configurable Logic Block NMI Flag

        - SYSCTL_NMI_SWERR - SW Error Force NMI Flag

  uint16_t `SysCtl_getNMIWatchdogCounter`(void)

    Gets the NMI watchdog counter value.

    Note: The counter is clocked at the SYSCLKOUT rate.

    Return

      Returns the NMI watchdog counter register’s current value.

  void `SysCtl_setNMIWatchdogPeriod`(uint16_t wdPeriod)

    Sets the NMI watchdog period value.

    This function writes to the NMI watchdog period register that holds the value to which the NMI watchdog counter is compared. When the two registers match, a reset is generated. By default, the period is 0xFFFF.

    Parameters

      - `wdPeriod`: is the 16-bit value at which a reset is generated.

    Note

      If a value smaller than the current counter value is passed into the wdPeriod parameter, a NMIRSn will be forced.

    Return

      None.

  uint16_t `SysCtl_getNMIWatchdogPeriod`(void)

    Gets the NMI watchdog period value.

    Return

      Returns the NMI watchdog period register’s current value.

  uint32_t `SysCtl_getNMIShadowFlagStatus`(void)

    Read NMI Shadow Flags.

    Read the current state of individual NMI interrupts

    Return

      Value of NMISHDFLG register. These defines are provided to decode the value:

      - SYSCTL_NMI_NMIINT - NMI Interrupt Flag

      - SYSCTL_NMI_CLOCKFAIL - Clock Fail Interrupt Flag

      - SYSCTL_NMI_RAMUNCERR - RAM Uncorrectable Error NMI Flag

      - SYSCTL_NMI_FLUNCERR - Flash Uncorrectable Error NMI Flag

      - SYSCTL_NMI_PIEVECTERR - PIE Vector Fetch Error Flag

      - SYSCTL_NMI_CLBNMI - Configurable Logic Block NMI Flag

      - SYSCTL_NMI_SWERR - SW Error Force NMI Flag

  bool `SysCtl_isNMIShadowFlagSet`(uint32_t nmiFlags)

    Check if the individual NMI shadow flags are set.

    Check if interrupt flags corresponding to the passed in bit mask are asserted.

    Parameters

      - `nmiFlags`: Bit mask of the NMI interrupts that user wants to clear. The bit format of this parameter is same as of the NMIFLG register. These defines are provided:

        - SYSCTL_NMI_NMIINT - NMI Interrupt Flag

        - SYSCTL_NMI_CLOCKFAIL - Clock Fail Interrupt Flag

        - SYSCTL_NMI_RAMUNCERR - RAM Uncorrectable Error NMI Flag

        - SYSCTL_NMI_FLUNCERR - Flash Uncorrectable Error NMI Flag

        - SYSCTL_NMI_PIEVECTERR - PIE Vector Fetch Error Flag

        - SYSCTL_NMI_CLBNMI - Configurable Logic Block NMI Flag

        - SYSCTL_NMI_SWERR - SW Error Force NMI Flag

    Return

      true if any of the NMI asked for in the parameter bit mask is set. false if none of the NMI requested in the parameter bit mask are set.

  void `SysCtl_enableMCD`(void)

    Enable the missing clock detection (MCD) Logic

    Return

      None.

  void `SysCtl_disableMCD`(void)

    Disable the missing clock detection (MCD) Logic

    Return

      None.

  bool `SysCtl_isMCDClockFailureDetected`(void)

    Get the missing clock detection Failure Status

    Note

      A failure means the oscillator clock is missing

    Return

      Returns true if a failure is detected or false if a failure isn’t detected

  void `SysCtl_resetMCD`(void)

    Reset the missing clock detection logic after clock failure

    Return

      None.

  void `SysCtl_connectMCDClockSource`(void)

    Re-connect missing clock detection clock source to stop simulating clock failure

    Return

      None.

  void `SysCtl_disconnectMCDClockSource`(void)

    Disconnect missing clock detection clock source to simulate clock failure. This is for testing the MCD functionality.

    Return

      None.

  void `SysCtl_lockAccessControlRegs`(void)

    Lock the Access Control Registers

    This function locks the access control registers and puts them in a read-only state.

    Note

      Only a reset can unlock the access control registers.

    Return

      None.

  void `SysCtl_setPeripheralAccessControl`(SysCtl_AccessPeripheral peripheral, SysCtl_AccessMaster master, SysCtl_AccessPermission permission)

    Set the peripheral access control permissions

    This function sets the specified peripheral access control permissions for the the specified master (CPU1, CLA1, or DMA1)

    Parameters

      - `peripheral`: is the selected peripheral

      - `master`: is the selected master (CPU1, CLA1, or DMA1)

      - `permission`: is the selected access permissions

    The peripheral parameter can have one enumerated value in the format of SYSCTL_ACCESS_X where X is the name of the peripheral instance to be configured such as SYSCTL_ACCESS_ADCA.

    The master parameter can have one the following enumerated values:

    - SYSCTL_ACCESS_CPU1 - CPU1 Master

    - SYSCTL_ACCESS_CLA1 - CLA1 Master

    - SYSCTL_ACCESS_DMA1 - DMA1 Master

    The permission parameter can have one the following enumerated values:

    - SYSCTL_ACCESS_FULL - Full Access for both read and write

    - SYSCTL_ACCESS_PROTECTED - Protected read access such that FIFOs, clear on read registers are not changed, and no write access

    - SYSCTL_ACCESS_NONE - No read or write access

    Return

      None.

  uint32_t `SysCtl_getPeripheralAccessControl`(SysCtl_AccessPeripheral peripheral, SysCtl_AccessMaster master)

    Get the peripheral access control permissions

    This function gets the specified peripheral access control permissions for the the specified master (CPU1, CLA1, or DMA1)

    Parameters

      - `peripheral`: is the selected peripheral

      - `master`: is the selected master (CPU1, CLA1, or DMA1)

    The peripheral parameter can have one enumerated value in the format of SYSCTL_ACCESS_X where X is the name of the peripheral instance to be configured such as SYSCTL_ACCESS_ADCA.

    The master parameter can have one the following enumerated values:

    - SYSCTL_ACCESS_CPU1 - CPU1 Master

    - SYSCTL_ACCESS_CLA1 - CLA1 Master

    - SYSCTL_ACCESS_DMA1 - DMA1 Master

    Return

      Returns one of the following enumerated permission values:

      - SYSCTL_ACCESS_FULL - Full Access for both read and write

      - SYSCTL_ACCESS_PROTECTED - Protected read access such that FIFOs, clear on read registers are not changed, and no write access

      - SYSCTL_ACCESS_NONE - No read or write access

  void `SysCtl_setSyncInputConfig`(SysCtl_SyncInput syncInput, SysCtl_SyncInputSource syncSrc)

    Configures the sync input source for the ePWM and eCAP signals.

    This function configures the sync input source for the ePWM and eCAP modules. The

    syncInput parameter is the sync input being configured. It should be passed a value of SYSCTL_SYNC_IN_XXXX, where XXXX is the ePWM or eCAP instance the sync signal is entering.
    Parameters

      - `syncInput`: is the sync input being configured

      - `syncSrc`: is sync input source selection.

    The syncSrc parameter is the sync signal selected as the source of the sync input. It should be passed a value of SYSCTL_SYNC_IN_SRC_XXXX, XXXX is a sync signal coming from an ePWM, eCAP or external sync output. where For example, a syncInput value of SYSCTL_SYNC_IN_ECAP1 and a syncSrc value of SYSCTL_SYNC_IN_SRC_EPWM1SYNCOUT will make the EPWM1SYNCOUT signal drive eCAP1’s SYNCIN signal.

    Note that some syncSrc values are only valid for certain values of syncInput. See device technical reference manual for details on time-base counter synchronization.

    Return

      None.

  void `SysCtl_setSyncOutputConfig`(SysCtl_SyncOutputSource syncSrc)

    Configures the sync output source.

    This function configures the sync output source from the ePWM modules. The

    syncSrc parameter is a value SYSCTL_SYNC_OUT_SRC_XXXX, where XXXX is a sync signal coming from an ePWM such as SYSCTL_SYNC_OUT_SRC_EPWM1SYNCOUT
    Parameters

      - `syncSrc`: is sync output source selection.

    Return

      None.

  void `SysCtl_enableExtADCSOCSource`(uint32_t adcsocSrc)

    Enables ePWM SOC signals to drive an external (off-chip) ADCSOC signal.

    This function configures which ePWM SOC signals are enabled as a source for either ADCSOCAO or ADCSOCBO. The

    adcsocSrc parameter takes a logical OR of SYSCTL_ADCSOC_SRC_PWMxSOCA/B values that correspond to different signals.
    Parameters

      - `adcsocSrc`: is a bit field of the selected signals to be enabled

    Return

      None.

  void `SysCtl_disableExtADCSOCSource`(uint32_t adcsocSrc)

    Disables ePWM SOC signals from driving an external ADCSOC signal.

    This function configures which ePWM SOC signals are disabled as a source for either ADCSOCAO or ADCSOCBO. The

    adcsocSrc parameter takes a logical OR of SYSCTL_ADCSOC_SRC_PWMxSOCA/B values that correspond to different signals.
    Parameters

      - `adcsocSrc`: is a bit field of the selected signals to be disabled

    Return

      None.

  void `SysCtl_lockExtADCSOCSelect`(void)

    Locks the SOC Select of the Trig X-BAR.

    This function locks the external ADC SOC select of the Trig X-BAR.

    Return

      None.

  void `SysCtl_lockSyncSelect`(void)

    Locks the Sync Select of the Trig X-BAR.

    This function locks Sync Input and Output Select of the Trig X-BAR.

    Return

      None.

  uint32_t `SysCtl_getDeviceRevision`(void)

    Get the Device Silicon Revision ID

    This function returns the silicon revision ID for the device.

    Note

      This API is applicable only for the CPU1 subsystem.

    Return

      Returns the silicon revision ID value.

  uint16_t `SysCtl_getEfuseError`(void)

    Gets the error status of the Efuse

    The function provides both the Efuse Autoload & the Efuse Self Test Error Status.

    Note

      This API is applicable only for the CPU1 subsystem.

    Return

      Fuse Error status.

  void `SysCtl_setXClk`(SysCtl_XClkDivider divider)

    Sets up XCLK divider.

    This function sets up the XCLK divider. There is only one divider that scales INTOSC1 to XCLK.

    Parameters

      - `divider`: is the value that configures the divider.

    The divider parameter can have one enumerated value from SysCtl_XClkDivider

    Return

      None.

  void `SysCtl_setPLLSysClk`(uint16_t divider)

    Sets up PLLSYSCLK divider.

    This function sets up the PLLSYSCLK divider. There is only one divider that scales PLLSYSCLK to generate the system clock.

    Parameters

      - `divider`: is the value that configures the divider.

    The divider parameter can have one value from the set below: 0x0 = /1 0x1 = /2 0x2 = /4 (default on reset) 0x3 = /6 0x4 = /8 …… 0x3F =/126

    Return

      None.

    Note

      Please make sure to check if the PLL is locked and valid using the SysCtl_isPLLValid() before setting the divider.

  void `SysCtl_setCputimer2Clk`(SysCtl_Cputimer2ClkDivider divider, SysCtl_Cputimer2ClkSource source)

    Sets up CPU Timer 2 CLK source & divider.

    This function sets up the CPU Timer 2 CLK divider based on the source that is selected. There is only one divider that scales the “source” to CPU Timer 2 CLK.

    Parameters

      - `divider`: is the value that configures the divider.

      - `source`: is the source for the clock divider

    The divider parameter can have one enumerated value from SysCtl_Cputimer2ClkDivider The source parameter can have one enumerated value from SysCtl_Cputimer2ClkSource

    Return

      None.

  uint32_t `SysCtl_getPIEVErrAddr`(void)

    Gets the PIE Vector Fetch Error Handler Routine Address.

    The function indicates the address of the PIE Vector Fetch Error handler routine.

    Return

      Error Handler Address.

    Note

      Its the responsibility of user to initialize this register. If this register is not initialized, a default error handler at address 0x3fffbe will get executed.

  void `SysCtl_delay`(uint32_t count)

    Delays for a fixed number of cycles.

    This function generates a constant length delay using assembly code. The loop takes 5 cycles per iteration plus 9 cycles of overhead.

    Parameters

      - `count`: is the number of delay loop iterations to perform.

    Note

      If count is equal to zero, the loop will underflow and run for a very long time.

    Note

      Refer to the macro DEVICE_DELAY_US(x) in device.h which can be used to insert a delay in microseconds.

    Return

      None.

  uint32_t `SysCtl_getClock`(uint32_t clockInHz)

    Calculates the system clock frequency (SYSCLK).

    This function determines the frequency of the system clock based on the frequency of the oscillator clock source (from

    clockInHz) and the PLL and clock divider configuration registers.
    Parameters

      - `clockInHz`: is the frequency of the oscillator clock source (OSCCLK).

    Return

      Returns the system clock frequency. If a missing clock is detected, the function will return the INTOSC1 frequency. This needs to be corrected and cleared (see SysCtl_resetMCD()) before trying to call this function again.

  bool `SysCtl_setClock`(uint32_t config)

    Configures the clocking of the device.

    This function configures the clocking of the device. The input crystal frequency, oscillator to be used, use of the PLL, and the system clock divider are all configured with this function.

    Parameters

      - `config`: is the required configuration of the device clocking.

    The config parameter is the OR of several different values, many of which are grouped into sets where only one can be chosen.

    - The system clock divider is chosen with the macro SYSCTL_SYSDIV(x) where x is either 1 or an even value up to 126.

    - The use of the PLL is chosen with either SYSCTL_PLL_ENABLE or SYSCTL_PLL_DISABLE.

    - The integer multiplier is chosen SYSCTL_IMULT(x) where x is a value from 1 to 127.

    - The fractional multiplier is chosen with either SYSCTL_FMULT_0, SYSCTL_FMULT_1_4, SYSCTL_FMULT_1_2, or SYSCTL_FMULT_3_4.

    - The oscillator source chosen with SYSCTL_OSCSRC_OSC2, SYSCTL_OSCSRC_XTAL, SYSCTL_OSCSRC_XTAL_SE or SYSCTL_OSCSRC_OSC1.

    This function uses the DCC to check that the PLLRAWCLK is running at the expected rate. If you are using the DCC, you must back up its configuration before calling this function and restore it afterward. Locking PLL sequence is only done if the multipliers are updated.

    Note

      See your device errata for more details about locking the PLL.

    Return

      Returns false if a missing clock error is detected. This needs to be cleared (see SysCtl_resetMCD()) before trying to call this function again. Also, returns false if the PLLRAWCLK is not running and its expected rate after SYSCTL_PLL_RETRIES retries. Otherwise, returns true.

  bool `SysCtl_isPLLValid`(uint32_t oscSource, uint32_t pllMult)

    Validates PLL Raw Clock Frequency (PLLRAWCLK)

    This function uses DCC module to validate the PLL clock frequency. It uses oscSource as a reference clock for DCC, and PLL is used as clock under test. As long as the Counter0 (running of oscSource) & Counter1 (running of PLL) expire at the same time, DCC will not generate an Error. This function gives 100 attempts for PLL to lock and make sure frequency is as expected.

    Parameters

      - `oscSource`: is the Clock Source for the PLL that is also used for DCC

      - `pllMult`: has the PLL Multiplier Register configuration which include integer and fractional multiplier used to configure the DCC Counter1 clock

    - The oscSource parameter is the oscillator source chosen with SYSCTL_OSCSRC_OSC2, SYSCTL_OSCSRC_XTAL, SYSCTL_OSCSRC_XTAL_SE or SYSCTL_OSCSRC_OSC1.

    - The pllMult parameter is a bitwise OR of SYSCTL_IMULT(x) where x is a value from 1 to 127 and one of the following fractional values: SYSCTL_FMULT_0, SYSCTL_FMULT_1_4, SYSCTL_FMULT_1_2, or SYSCTL_FMULT_3_4.

      Return

        Returns true if the DCCSTATUS error flag is not set. Otherwise, returns false.

    Note

      This function does not validate if PLL output frequency (PLLRAWCLK) is within the operating range as per the datasheet.

  void `SysCtl_selectXTAL`(void)

    Configures the external oscillator for the clocking of the device.

    This function configures the external oscillator (XTAL) to be used for the clocking of the device in crystal mode. It follows the procedure to turn on the oscillator, wait for it to power up, and select it as the source of the system clock.

    Please note that this function blocks while it waits for the XTAL to power up. If the XTAL does not manage to power up properly, the function will loop for a long time. It is recommended that you modify this function to add an appropriate timeout and error-handling procedure.

    Return

      None.

  void `SysCtl_selectXTALSingleEnded`(void)

    Configures the external oscillator for the clocking of the device in single-ended mode.

    This function configures the external oscillator (XTAL) to be used for the clocking of the device in single-ended mode. It follows the procedure to turn on the oscillator, wait for it to power up, and select it as the source of the system clock.

    Please note that this function blocks while it waits for the XTAL to power up. If the XTAL does not manage to power up properly, the function will loop for a long time. It is recommended that you modify this function to add an appropriate timeout and error-handling procedure.

    Return

      None.

  void `SysCtl_selectOscSource`(uint32_t oscSource)

    Selects the oscillator to be used for the clocking of the device.

    This function configures the oscillator to be used in the clocking of the device. The

    oscSource parameter may take a value of SYSCTL_OSCSRC_OSC2, SYSCTL_OSCSRC_XTAL, SYSCTL_OSCSRC_XTAL_SE, or SYSCTL_OSCSRC_OSC1.
    Parameters

      - `oscSource`: is the oscillator source to be configured.

    See

      SysCtl_turnOnOsc()

    Return

      None.

  uint32_t `SysCtl_getLowSpeedClock`(uint32_t clockInHz)

    Calculates the low-speed peripheral clock frequency (LSPCLK).

    This function determines the frequency of the low-speed peripheral clock based on the frequency of the oscillator clock source (from

    clockInHz) and the PLL and clock divider configuration registers.
    Parameters

      - `clockInHz`: is the frequency of the oscillator clock source (OSCCLK).

    Return

      Returns the low-speed peripheral clock frequency.

  uint16_t `SysCtl_getDeviceParametric`(SysCtl_DeviceParametric parametric)

    Get the device part parametric value

    This function gets the device part parametric value.

    Parameters

      - `parametric`: is the requested device parametric value

    The parametric parameter can have one the following enumerated values:

    - SYSCTL_DEVICE_QUAL - Device Qualification Status

    - SYSCTL_DEVICE_PINCOUNT - Device Pin Count

    - SYSCTL_DEVICE_INSTASPIN - Device InstaSPIN Feature Set

    - SYSCTL_DEVICE_FLASH - Device Flash size (KB)

    - SYSCTL_DEVICE_FAMILY - Device Family

    - SYSCTL_DEVICE_PARTNO - Device Part Number

    - SYSCTL_DEVICE_CLASSID - Device Class ID

    Note

      This API is applicable only for the CPU1 subsystem.

    Return

      Returns the specified parametric value.

Many of the functions provided by the SysCtl API are related to device clocking. The most important of these functions is SysCtl_setClock() which will configure which oscillator is to be used, configure the PLL, and configure the system clock divider. SysCtl_getClock() is a complementary function to this one that will, given the frequency of the oscillator source used, read back the configuration of the PLL and clock divider and calculate the system clock frequency. A similar pair of functions is provided for the low-speed peripheral clock, SysCtl_setLowSpeedClock() and SysCtl_getLowSpeedClock().

The ability to enable (turn on the module clock), disable (gate off the module clock), and perform a software reset on most of the peripherals on a device is provided by SysCtl_enablePeripheral(), SysCtl_disablePeripheral(), and SysCtl_resetPeripheral() respectively.

The device’s windowed watchdog is enabled and disabled by SysCtl_enableWatchdog() and SysCtl_disableWatchdog() respectively. The watchdog can be serviced by SysCtl_serviceWatchdog(). Several functions are also provided to configure the watchdog’s clock and windowed functionality.

This section will give further details of these functions and each of the others used for the configuration of SysCtl.

The code for this module is contained in driverlib/sysctl.c, with driverlib/sysctl.h containing the API declarations for use by applications.