//*****************************************************************************
//
//! @brief Set up the stimer.
//!
//! @param ui32STimerConfig is the value to load into the configuration reg.
//!
//! This function should be used to perform the initial set-up of the
//! stimer.
//!
//! @return The 32-bit current config of the STimer Config register
//
//*****************************************************************************
uint32_t
am_hal_stimer_config(uint32_t ui32STimerConfig)
{
uint32_t ui32CurrVal;
//
// Read the current config
//
ui32CurrVal = AM_REG(CTIMER, STCFG);
//
// Write our configuration value.
//
AM_REG(CTIMER, STCFG) = ui32STimerConfig;
//
// If all of the clock sources are not HFRC, disable LDO when sleeping if timers are enabled.
//
if ( (AM_BFR(CTIMER, STCFG, CLKSEL) == AM_REG_CTIMER_STCFG_CLKSEL_HFRC_DIV16) ||
(AM_BFR(CTIMER, STCFG, CLKSEL) == AM_REG_CTIMER_STCFG_CLKSEL_HFRC_DIV256) )
{
AM_BFW(PWRCTRL, MISCOPT, DIS_LDOLPMODE_TIMERS, 0);
}
else
{
AM_BFW(PWRCTRL, MISCOPT, DIS_LDOLPMODE_TIMERS, 1);
}
return ui32CurrVal;
}
//*****************************************************************************
//
//! @brief Enable UART system clock.
//!
//! This function enables or disables the UART system clock.
//!
//! @param ui32Module is 0 or 1 for Apollo2.
//! @param ui32UartEn is one of the following.
//! AM_HAL_CLKGEN_UARTEN_DIS
//! AM_HAL_CLKGEN_UARTEN_EN
//! AM_HAL_CLKGEN_UARTEN_REDUCE_FREQ
//! AM_HAL_CLKGEN_UARTEN_EN_POWER_SAV
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_uarten_set(uint32_t ui32Module, uint32_t ui32UartEn)
{
uint32_t ui32Mask;
if ( (ui32Module >= AM_REG_UART_NUM_MODULES) ||
(ui32UartEn > AM_HAL_CLKGEN_UARTEN_EN_POWER_SAV) )
{
return;
}
ui32UartEn <<= (ui32Module * AM_HAL_CLKGEN_UARTEN_UARTENn_S(ui32Module));
ui32Mask = ~(AM_HAL_CLKGEN_UARTEN_UARTENn_M(ui32Module));
//
// Begin critical section.
//
AM_CRITICAL_BEGIN_ASM
//
// Set the UART clock
//
AM_REG(CLKGEN, UARTEN) &= ui32Mask;
AM_REG(CLKGEN, UARTEN) |= ui32UartEn;
//
// Begin critical section.
//
AM_CRITICAL_END_ASM
}
//*****************************************************************************
//
//! @brief Gets the fault status and capture registers.
//!
//! @param psFault is a pointer to a structure that will be used to store all
//! fault info.
//!
//! This function gets the status of the ICODE, DCODE, and SYS bus faults and
//! the addresses associated with the fault.
//!
//! @return None
//
//*****************************************************************************
void
am_hal_mcuctrl_fault_status(am_hal_mcuctrl_fault_t *psFault)
{
uint32_t ui32FaultStat;
//
// Read the Fault Status Register.
//
ui32FaultStat = AM_REG(MCUCTRL, FAULTSTATUS);
psFault->bICODE = (ui32FaultStat & AM_REG_MCUCTRL_FAULTSTATUS_ICODE_M);
psFault->bDCODE = (ui32FaultStat & AM_REG_MCUCTRL_FAULTSTATUS_DCODE_M);
psFault->bSYS = (ui32FaultStat & AM_REG_MCUCTRL_FAULTSTATUS_SYS_M);
//
// Read the DCODE fault capture address register.
//
psFault->ui32DCODE = AM_REG(MCUCTRL, DCODEFAULTADDR);
//
// Read the ICODE fault capture address register.
//
psFault->ui32ICODE |= AM_REG(MCUCTRL, ICODEFAULTADDR);
//
// Read the ICODE fault capture address register.
//
psFault->ui32SYS |= AM_REG(MCUCTRL, SYSFAULTADDR);
}
//*****************************************************************************
//
//! @brief Enable the PDM module.
//!
//! This function enables the PDM module in the mode previously defined by
//! am_hal_pdm_config().
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_pdm_enable(void)
{
AM_REG(PDM, PCFG) |= AM_REG_PDM_PCFG_PDMCORE_EN;
AM_REG(PDM, VCFG) |= ( AM_REG_PDM_VCFG_IOCLKEN_EN |
AM_REG_PDM_VCFG_PDMCLK_EN |
AM_REG_PDM_VCFG_RSTB_NORM );
}
//*****************************************************************************
//
//! @brief Disable the PDM module.
//!
//! This function disables the PDM module.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_pdm_disable(void)
{
AM_REG(PDM, PCFG) &= ~ AM_REG_PDM_PCFG_PDMCORE_EN;
AM_REG(PDM, VCFG) &= ~ ( AM_REG_PDM_VCFG_IOCLKEN_EN |
AM_REG_PDM_VCFG_PDMCLK_EN |
AM_REG_PDM_VCFG_RSTB_NORM );
}
//*****************************************************************************
//
//! @brief Read the state of the wdt interrupt status.
//!
//! @param bEnabledOnly - return the status of only the enabled interrupts.
//!
//! This function extracts the interrupt status bits and returns the enabled or
//! raw based on bEnabledOnly.
//!
//! @return WDT interrupt status.
//
//*****************************************************************************
uint32_t
am_hal_wdt_int_status_get(bool bEnabledOnly)
{
if (bEnabledOnly)
{
uint32_t u32RetVal = AM_REG(WDT, INTSTAT);
return u32RetVal & AM_REG(WDT, INTEN);
}
else
{
return AM_REG(WDT, INTSTAT);
}
}
//*****************************************************************************
//
//! @brief Clear the stimer counter.
//!
//! This function clears the STimer Counter and leaves the stimer running.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_stimer_counter_clear(void)
{
//
// Set the clear bit
//
AM_REG(CTIMER, STCFG) |= AM_REG_CTIMER_STCFG_CLEAR_M;
//
// Reset the clear bit
//
AM_REG(CTIMER, STCFG) &= ~AM_REG_CTIMER_STCFG_CLEAR_M;
}
//*****************************************************************************
//
//! @brief Sets the interrupt status.
//!
//! @param ui32IntFlags interrupts to be enabled.
//!
//! This function sets the interrupts.
//!
//! Valid values for ui32IntFlags are:
//!
//! AM_HAL_CLKGEN_INT_RTC_ALARM
//! AM_HAL_CLKGEN_INT_XT_FAIL
//! AM_HAL_CLKGEN_INT_AUTOCAL_COMPLETE
//! AM_HAL_CLKGEN_INT AUTOCAL_FAIL
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_int_set(uint32_t ui32Interrupt)
{
//
// Set the interrupt status.
//
AM_REG(CLKGEN, INTSET) = ui32Interrupt;
}
//*****************************************************************************
//
//! @brief Return enabled CLKGEN Interrupts.
//!
//! Use this function to get all enabled CLKGEN interrupts.
//!
//! @return enabled CLKGEN interrupts.
//
//*****************************************************************************
uint32_t
am_hal_clkgen_int_enable_get(void)
{
//
// Return the enabled interrupts.
//
return AM_REG(CLKGEN, INTEN);
}
//*****************************************************************************
//
//! @brief Gets the interrupt configuration.
//!
//! @param bEnabledOnly - return the status of only the enabled interrupts.
//!
//! This function gets the currently configured interrupts.
//!
//! @return the configured interrupts.
//!
//! Possible values for the return are:
//!
//! AM_HAL_CLKGEN_INT_RTC_ALARM
//! AM_HAL_CLKGEN_INT_XT_FAIL
//! AM_HAL_CLKGEN_INT_AUTOCAL_COMPLETE
//! AM_HAL_CLKGEN_INT AUTOCAL_FAIL
//
//*****************************************************************************
uint32_t
am_hal_clkgen_int_status_get(bool bEnabledOnly)
{
//
// Return the status.
//
if ( bEnabledOnly )
{
uint32_t u32RetVal = AM_REG(CLKGEN, INTSTAT);
u32RetVal &= AM_REG(CLKGEN, INTEN);
return u32RetVal;
}
else
{
return AM_REG(CLKGEN, INTSTAT);
}
}
//*****************************************************************************
//
//! @brief Stops the desired oscillator(s) (OSC).
//!
//! @param ui32OscFlags oscillator(s) to stop.
//!
//! This function stops the desired oscillator(s) (OSC).
//!
//! Valid values for ui32OscFlags are:
//!
//! AM_HAL_CLKGEN_OSC_LFRC
//! AM_HAL_CLKGEN_OSC_XT
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_osc_stop(uint32_t ui32OscFlags)
{
//
// Stop the oscillator(s).
//
AM_REG(CLKGEN, OCTRL) |= ui32OscFlags;
}
//*****************************************************************************
//
//! @brief Disable selected CLKGEN Interrupts.
//!
//! Use this function to disable the CLKGEN interrupts.
//!
//! @param ui32Interrupt - Use the macro bit fields provided in am_hal_clkgen.h
//!
//! @return None
//
//*****************************************************************************
void
am_hal_clkgen_int_disable(uint32_t ui32Interrupt)
{
//
// Disable the interrupts.
//
AM_REG(CLKGEN, INTEN) &= ~ui32Interrupt;
}
//*****************************************************************************
//
//! @brief Enable selected CLKGEN Interrupts.
//!
//! Use this function to enable the interrupts.
//!
//! @param ui32Interrupt - Use the macro bit fields provided in am_hal_clkgen.h
//!
//! @return None
//
//*****************************************************************************
void
am_hal_clkgen_int_enable(uint32_t ui32Interrupt)
{
//
// Enable the interrupts.
//
AM_REG(CLKGEN, INTEN) |= ui32Interrupt;
}
//*****************************************************************************
//
//! @brief Enables the clock out signal.
//!
//! @param ui32Signal desired location for the clock out signal.
//!
//! This function enables the clock out signal. See am_hal_clkgen.h for
//! available signals.
//!
//! e.g. AM_HAL_CLKGEN_CLKOUT_CKSEL_HFRC
//! AM_HAL_CLKGEN_CLKOUT_CKSEL_HFRC_DIV4
//! AM_HAL_CLKGEN_CLKOUT_CKSEL_LFRC
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_clkout_enable(uint32_t ui32Signal)
{
//
// Enable the clock out on desired signal.
//
AM_REG(CLKGEN, CLKOUT) = AM_REG_CLKGEN_CLKOUT_CKEN_M | ui32Signal;
}
//*****************************************************************************
//
//! @brief Disables the clock out signal.
//!
//! This function disables the clock out signal.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_clkout_disable(void)
{
//
// Disable the clock out.
//
AM_REG(CLKGEN, CLKOUT) = 0;
}
//*****************************************************************************
//
//! @brief Starts the desired oscillator(s) (OSC).
//!
//! @param ui32OscFlags oscillator(s) to start.
//!
//! This function starts the desired oscillator(s) (OSC).
//!
//! Valid values for ui32OscFlags are:
//!
//! AM_HAL_CLKGEN_OSC_LFRC
//! AM_HAL_CLKGEN_OSC_XT
//!
//! @return 0 None.
//
//*****************************************************************************
void
am_hal_clkgen_osc_start(uint32_t ui32OscFlags)
{
//
// Start the oscillator(s).
//
AM_REG(CLKGEN, OCTRL) &= ~ui32OscFlags;
}
//*****************************************************************************
//
//! @brief Clears the interrupts.
//!
//! @param ui32IntFlags interrupts to be cleared.
//!
//! This function clears the interrupts.
//!
//! Valid values for ui32IntFlags are:
//!
//! AM_HAL_CLKGEN_INT_RTC_ALARM
//! AM_HAL_CLKGEN_INT_XT_FAIL
//! AM_HAL_CLKGEN_INT_AUTOCAL_COMPLETE
//! AM_HAL_CLKGEN_INT AUTOCAL_FAIL
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_int_clear(uint32_t ui32Interrupt)
{
//
// Clear the interrupts.
//
AM_REG(CLKGEN, INTCLR) = ui32Interrupt;
}
//*****************************************************************************
//
//! @brief Start capturing data with the specified capture register.
//!
//! @param ui32CaptureNum is the Capture Register Number to read.
//!
//! Use this function to start capturing.
//!
//! @return None.
//
//*****************************************************************************
void am_hal_stimer_capture_stop(uint32_t ui32CaptureNum)
{
//
// Disable it in the CTIMER block.
//
AM_REG(CTIMER, CAPTURE_CONTROL) &=
~(AM_REG_CTIMER_CAPTURE_CONTROL_CAPTURE_A_M <<
((AM_REG_CTIMER_CAPTURE_CONTROL_CAPTURE_B_S -
AM_REG_CTIMER_CAPTURE_CONTROL_CAPTURE_A_S) * ui32CaptureNum));
}
//*****************************************************************************
//
//! @brief Select the clock divisor for the main system clock.
//!
//! @param ui32ClockSetting - The divisor value for the system clock.
//!
//! This function can be used to select the frequency of the main system clock.
//! The \e ui32ClockSetting parameter should be set to one of the following
//! values:
//!
//! AM_HAL_CLKGEN_SYSCLK_MAX
//! AM_HAL_CLKGEN_SYSCLK_48MHZ
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_sysclk_select(uint32_t ui32ClockSetting)
{
am_hal_debug_assert_msg(ui32ClockSetting == AM_HAL_CLKGEN_SYSCLK_48MHZ,
"am_hal_clkgen_sysclk_select(): invalid clock setting.");
//
// Unlock the clock control register.
//
AM_REG(CLKGEN, CLKKEY) = AM_REG_CLKGEN_CLKKEY_KEYVAL;
//
// Set the HFRC divisor to the user-selected value.
//
AM_REG(CLKGEN, CCTRL) = ui32ClockSetting;
//
// Lock the clock configuration registers.
//
AM_REG(CLKGEN, CLKKEY) = 0;
}
//*****************************************************************************
//
//! @brief Disables the ITM
//!
//! This function completely disables the ARM ITM by resetting the TRCENA bit
//! in the DEMCR register.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_itm_disable(void)
{
if (g_ui32HALflags & AM_HAL_FLAGS_ITMSKIPENABLEDISABLE_M)
{
return;
}
//
// Make sure the ITM_TCR is unlocked.
//
AM_REGVAL(AM_REG_ITM_LOCKAREG_O) = AM_REG_ITM_LOCKAREG_KEYVAL;
//
// Make sure the ITM/TPIU is not busy.
//
while ( AM_REG(ITM, TCR) & AM_REG_ITM_TCR_BUSY(1) );
//
// Disable the ITM.
//
for (int ix = 0; ix < 100; ix++)
{
AM_REG(ITM, TCR) &= ~AM_REG_ITM_TCR_ITM_ENABLE(1);
while ( AM_REG(ITM, TCR) & (AM_REG_ITM_TCR_ITM_ENABLE(1) | AM_REG_ITM_TCR_BUSY(1)) );
}
//
// Reset the TRCENA bit in the DEMCR register, which should disable the ITM
// for operation.
//
AM_REG(SYSCTRL, DEMCR) &= ~AM_REG_SYSCTRL_DEMCR_TRCENA(1);
//
// Disable the TPIU clock source in MCU control.
//
AM_REG(MCUCTRL, TPIUCTRL) = AM_REG_MCUCTRL_TPIUCTRL_CLKSEL_0MHz |
AM_REG_MCUCTRL_TPIUCTRL_ENABLE_DIS;
}
//*****************************************************************************
//
//! @brief Enables the ITM
//!
//! This function enables the ARM ITM by setting the TRCENA bit in the DEMCR
//! register.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_itm_enable(void)
{
if (g_ui32HALflags & AM_HAL_FLAGS_ITMSKIPENABLEDISABLE_M)
{
return;
}
//
// To be able to access ITM registers, set the Trace Enable bit
// in the Debug Exception and Monitor Control Register (DEMCR).
//
AM_REG(SYSCTRL, DEMCR) |= AM_REG_SYSCTRL_DEMCR_TRCENA(1);
while ( !(AM_REG(SYSCTRL, DEMCR) & AM_REG_SYSCTRL_DEMCR_TRCENA(1)) );
//
// Write the key to the ITM Lock Access register to unlock the ITM_TCR.
//
AM_REGVAL(AM_REG_ITM_LOCKAREG_O) = AM_REG_ITM_LOCKAREG_KEYVAL;
//
// Set the enable bits in the ITM trace enable register, and the ITM
// control registers to enable trace data output.
//
AM_REGVAL(AM_REG_ITM_TPR_O) = 0x0000000f;
AM_REGVAL(AM_REG_ITM_TER_O) = 0xffffffff;
//
// Write to the ITM control and status register (don't enable yet).
//
AM_REGVAL(AM_REG_ITM_TCR_O) =
AM_WRITE_SM(AM_REG_ITM_TCR_ATB_ID, 0x15) |
AM_WRITE_SM(AM_REG_ITM_TCR_TS_FREQ, 1) |
AM_WRITE_SM(AM_REG_ITM_TCR_TS_PRESCALE, 1) |
AM_WRITE_SM(AM_REG_ITM_TCR_SWV_ENABLE, 1) |
AM_WRITE_SM(AM_REG_ITM_TCR_DWT_ENABLE, 0) |
AM_WRITE_SM(AM_REG_ITM_TCR_SYNC_ENABLE, 0) |
AM_WRITE_SM(AM_REG_ITM_TCR_TS_ENABLE, 0) |
AM_WRITE_SM(AM_REG_ITM_TCR_ITM_ENABLE, 1);
}
//*****************************************************************************
//
//! @brief Disables HFRC auto-adjustment.
//!
//! This function disables HFRC auto-adjustment.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_hfrc_adjust_disable(void)
{
//
// Disable the clock out.
//
AM_REG(CLKGEN, HFADJ) =
AM_REG_CLKGEN_HFADJ_HFADJ_GAIN_Gain_of_1_in_2 |
AM_REG_CLKGEN_HFADJ_HFWARMUP_1SEC |
AM_REG_CLKGEN_HFADJ_HFXTADJ(AM_REG_CLKGEN_HFADJ_HFXTADJ_DEFAULT) |
AM_REG_CLKGEN_HFADJ_HFADJCK_4SEC |
AM_REG_CLKGEN_HFADJ_HFADJEN_DIS;
}
//*****************************************************************************
//
//! @brief Checks if itm is busy and provides a delay to flush the fifo
//!
//! This function disables the ARM ITM by resetting the TRCENA bit in the DEMCR
//! register.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_itm_not_busy(void)
{
//
// Make sure the ITM/TPIU is not busy.
//
while (AM_REG(ITM, TCR) & AM_REG_ITM_TCR_BUSY(1));
//
// wait for 50us for the data to flush out
//
am_hal_itm_delay_us(50);
}
//*****************************************************************************
//
//! @brief Configure the PDM module.
//!
//! This function reads the an \e am_hal_pdm_config_t structure and uses it to
//! set up the PDM module.
//!
//! Please see the information on the am_hal_pdm_config_t configuration
//! structure, found in am_hal_pdm.h, for more information on the parameters
//! that may be set by this function.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_pdm_config(am_hal_pdm_config_t *psConfig)
{
//
// setup the PDM PCFG register
//
AM_REG(PDM, PCFG) = psConfig->ui32PDMConfigReg;
//
// setup the PDM VCFG register
//
AM_REG(PDM, VCFG) = psConfig->ui32VoiceConfigReg;
//
// setup the PDM FIFO Threshold register
//
AM_REG(PDM, FTHR) = psConfig->ui32FIFOThreshold;
//
// Flush the FIFO for good measure.
//
am_hal_pdm_fifo_flush();
}
//*****************************************************************************
//
//! @brief Enables HFRC auto-adjustment at the specified interval.
//!
//! @param ui32Warmup - How long to give the HFRC to stabilize during each
//! calibration attempt.
//! @param ui32Frequency - How often the auto-adjustment should happen.
//!
//! This function enables HFRC auto-adjustment from an external crystal
//! oscillator even when the crystal is not normally being used.
//!
//! ui32Warmup should be one of the following values:
//!
//! AM_REG_CLKGEN_HFADJ_HFWARMUP_1SEC
//! AM_REG_CLKGEN_HFADJ_HFWARMUP_2SEC
//!
//! ui32Frequency should be one of the following values:
//!
//! AM_REG_CLKGEN_HFADJ_HFADJCK_4SEC
//! AM_REG_CLKGEN_HFADJ_HFADJCK_16SEC
//! AM_REG_CLKGEN_HFADJ_HFADJCK_32SEC
//! AM_REG_CLKGEN_HFADJ_HFADJCK_64SEC
//! AM_REG_CLKGEN_HFADJ_HFADJCK_128SEC
//! AM_REG_CLKGEN_HFADJ_HFADJCK_256SEC
//! AM_REG_CLKGEN_HFADJ_HFADJCK_512SEC
//! AM_REG_CLKGEN_HFADJ_HFADJCK_1024SEC
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_clkgen_hfrc_adjust_enable(uint32_t ui32Warmup, uint32_t ui32Frequency)
{
//
// Set the HFRC Auto-adjust register for the user's chosen settings. Assume
// that the HFRC should be calibrated to 48 MHz and that the crystal is
// running at 32.768 kHz.
//
AM_REG(CLKGEN, HFADJ) =
AM_REG_CLKGEN_HFADJ_HFADJ_GAIN_Gain_of_1_in_2 |
ui32Warmup |
AM_REG_CLKGEN_HFADJ_HFXTADJ(AM_REG_CLKGEN_HFADJ_HFXTADJ_DEFAULT) |
ui32Frequency |
AM_REG_CLKGEN_HFADJ_HFADJEN_EN;
}
//*****************************************************************************
//
//! @brief Start capturing data with the specified capture register.
//!
//! @param ui32CaptureNum is the Capture Register Number to read (0-3).
//! ui32GPIONumber is the pin number.
//! bPolarity: false (0) = Capture on low to high transition.
//! true (1) = Capture on high to low transition.
//!
//! Use this function to start capturing.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_stimer_capture_start(uint32_t ui32CaptureNum,
uint32_t ui32GPIONumber,
bool bPolarity)
{
uint32_t ui32CapCtrl;
if ( ui32GPIONumber > (AM_HAL_GPIO_MAX_PADS-1) )
{
return;
}
//
// Set the polarity and pin selection in the GPIO block.
//
switch (ui32CaptureNum)
{
case 0:
AM_BFW(GPIO, STMRCAP, STPOL0, bPolarity);
AM_BFW(GPIO, STMRCAP, STSEL0, ui32GPIONumber);
ui32CapCtrl = AM_REG_CTIMER_CAPTURE_CONTROL_CAPTURE_A_M;
break;
case 1:
AM_BFW(GPIO, STMRCAP, STPOL1, bPolarity);
AM_BFW(GPIO, STMRCAP, STSEL1, ui32GPIONumber);
ui32CapCtrl = AM_REG_CTIMER_CAPTURE_CONTROL_CAPTURE_B_M;
break;
case 2:
AM_BFW(GPIO, STMRCAP, STPOL2, bPolarity);
AM_BFW(GPIO, STMRCAP, STSEL2, ui32GPIONumber);
ui32CapCtrl = AM_REG_CTIMER_CAPTURE_CONTROL_CAPTURE_C_M;
break;
case 3:
AM_BFW(GPIO, STMRCAP, STPOL3, bPolarity);
AM_BFW(GPIO, STMRCAP, STSEL3, ui32GPIONumber);
ui32CapCtrl = AM_REG_CTIMER_CAPTURE_CONTROL_CAPTURE_D_M;
break;
default:
return; // error concealment.
}
//
// Enable it in the CTIMER Block
//
AM_REG(CTIMER, CAPTURE_CONTROL) |= ui32CapCtrl;
}
//*****************************************************************************
//
//! @brief Get the current system clock frequency.
//!
//! This function can be used to determine the frequency of the main system
//! clock. The return value is the system clock frequency measured in hertz.
//!
//! @return System clock frequency in Hz
//
//*****************************************************************************
uint32_t
am_hal_clkgen_sysclk_get(void)
{
uint32_t ui32ClockSetting;
//
// Read the value of the clock divider.
//
ui32ClockSetting = AM_REG(CLKGEN, CCTRL) & AM_REG_CLKGEN_CCTRL_CORESEL_M;
switch ( ui32ClockSetting )
{
case AM_REG_CLKGEN_CCTRL_CORESEL_HFRC:
return 48000000;
case AM_REG_CLKGEN_CCTRL_CORESEL_HFRC_DIV2:
return 24000000;
default:
return 0xFFFFFFFF;
}
}
//*****************************************************************************
//
//! @brief Gets all relevant device information.
//!
//! @param psDevice is a pointer to a structure that will be used to store all
//! device info.
//!
//! This function gets the device part number, chip IDs, and revision and
//! stores them in the passed structure.
//!
//! @return None
//
//*****************************************************************************
void
am_hal_mcuctrl_device_info_get(am_hal_mcuctrl_device_t *psDevice)
{
//
// Read the Part Number.
//
psDevice->ui32ChipPN = AM_REG(MCUCTRL, CHIP_INFO);
//
// Read the Chip ID0.
//
psDevice->ui32ChipID0 = AM_REG(MCUCTRL, CHIPID0);
//
// Read the Chip ID1.
//
psDevice->ui32ChipID1 = AM_REG(MCUCTRL, CHIPID1);
//
// Read the Chip Revision.
//
psDevice->ui32ChipRev = AM_REG(MCUCTRL, CHIPREV);
//
// Read the Part Number.
//
psDevice->ui32ChipPN = AM_REG(MCUCTRL, CHIP_INFO);
//
// Read the Chip ID0.
//
psDevice->ui32ChipID0 = AM_REG(MCUCTRL, CHIPID0);
//
// Read the Chip ID1.
//
psDevice->ui32ChipID1 = AM_REG(MCUCTRL, CHIPID1);
//
// Read the Chip Revision.
//
psDevice->ui32ChipRev = AM_REG(MCUCTRL, CHIPREV);
//
// Read the Chip VENDOR ID.
//
psDevice->ui32VendorID = AM_REG(MCUCTRL, VENDORID);
//
// Qualified from Part Number.
//
psDevice->ui32Qualified =
(psDevice->ui32ChipPN & AM_HAL_MCUCTRL_CHIP_INFO_QUAL_M) >>
AM_HAL_MCUCTRL_CHIP_INFO_QUAL_S;
//
// Flash size from Part Number.
//
psDevice->ui32FlashSize =
g_am_hal_mcuctrl_flash_size[
(psDevice->ui32ChipPN & AM_HAL_MCUCTRL_CHIP_INFO_FLASH_SIZE_M) >>
AM_HAL_MCUCTRL_CHIP_INFO_FLASH_SIZE_S];
//
// SRAM size from Part Number.
//
psDevice->ui32SRAMSize =
g_am_hal_mcuctrl_flash_size[
(psDevice->ui32ChipPN & AM_HAL_MCUCTRL_CHIP_INFO_SRAM_SIZE_M) >>
AM_HAL_MCUCTRL_CHIP_INFO_SRAM_SIZE_S];
//
// Now, let's look at the JEDEC info.
// The full partnumber is 12 bits total, but is scattered across 2 registers.
// Bits [11:8] are 0xE.
// Bits [7:4] are 0xE for Apollo, 0xD for Apollo2.
// Bits [3:0] are defined differently for Apollo and Apollo2.
// For Apollo, the low nibble is 0x0.
// For Apollo2, the low nibble indicates flash and SRAM size.
//
psDevice->ui32JedecPN = (AM_BFR(JEDEC, PID0, PNL8) << 0);
psDevice->ui32JedecPN |= (AM_BFR(JEDEC, PID1, PNH4) << 8);
//
// JEPID is the JEP-106 Manufacturer ID Code, which is assigned to Ambiq as
// 0x1B, with parity bit is 0x9B. It is 8 bits located across 2 registers.
//
psDevice->ui32JedecJEPID = (AM_BFR(JEDEC, PID1, JEPIDL) << 0);
psDevice->ui32JedecJEPID |= (AM_BFR(JEDEC, PID2, JEPIDH) << 4);
//
// CHIPREV is 8 bits located across 2 registers.
//
psDevice->ui32JedecCHIPREV = (AM_BFR(JEDEC, PID2, CHIPREVH4) << 4);
psDevice->ui32JedecCHIPREV |= (AM_BFR(JEDEC, PID3, CHIPREVL4) << 0);
//
// Let's get the Coresight ID (32-bits across 4 registers)
// For Apollo and Apollo2, it's expected to be 0xB105100D.
//
psDevice->ui32JedecCID = (AM_BFR(JEDEC, CID3, CID) << 24);
psDevice->ui32JedecCID |= (AM_BFR(JEDEC, CID2, CID) << 16);
psDevice->ui32JedecCID |= (AM_BFR(JEDEC, CID1, CID) << 8);
psDevice->ui32JedecCID |= (AM_BFR(JEDEC, CID0, CID) << 0);
}
//*****************************************************************************
//
//! @brief Disable the wdt interrupt.
//!
//! This function disablee the interrupt.
//!
//! @return None
//
//*****************************************************************************
void
am_hal_wdt_int_disable(void)
{
AM_REG(WDT, INTEN) &= ~AM_REG_WDT_INTSET_WDT_M;
}
//*****************************************************************************
//
//! @brief Configure the watchdog timer.
//!
//! @param psConfig - pointer to a configuration structure containing the
//! desired watchdog settings.
//!
//! This function will set the watchdog configuration register based on the
//! user's desired settings listed in the structure referenced by psConfig. If
//! the structure indicates that watchdog interrupts are desired, this function
//! will also set the interrupt enable bit in the configuration register.
//!
//! @note In order to actually receive watchdog interrupt and/or watchdog reset
//! events, the caller will also need to make sure that the watchdog interrupt
//! vector is enabled in the ARM NVIC, and that watchdog resets are enabled in
//! the reset generator module. Otherwise, the watchdog-generated interrupt and
//! reset events will have no effect.
//!
//! @return None.
//
//*****************************************************************************
void
am_hal_wdt_init(const am_hal_wdt_config_t *psConfig)
{
uint32_t ui32ConfigVal;
uint16_t ui16IntCount, ui16ResetCount;
bool bResetEnabled = psConfig->ui32Config & AM_HAL_WDT_ENABLE_RESET;
bool bInterruptEnabled = psConfig->ui32Config & AM_HAL_WDT_ENABLE_INTERRUPT;
//
// Read the desired settings from the psConfig structure.
//
ui16IntCount = psConfig->ui16InterruptCount;
ui16ResetCount = psConfig->ui16ResetCount;
//
// Write the interrupt and reset count values to a temporary variable.
//
// Accept the passed Config value, but clear the Counts that we are about to set.
ui32ConfigVal = psConfig->ui32Config & ~(AM_REG_WDT_CFG_INTVAL_M | AM_REG_WDT_CFG_RESVAL_M);
ui32ConfigVal |= AM_WRITE_SM(AM_REG_WDT_CFG_INTVAL, ui16IntCount);
ui32ConfigVal |= AM_WRITE_SM(AM_REG_WDT_CFG_RESVAL, ui16ResetCount);
//
// If interrupts should be enabled, set the appropriate bit in the
// temporary variable. Also, enable the interrupt in INTEN register in the
// watchdog module.
//
if ( bInterruptEnabled )
{
//
// Enable the watchdog interrupt if the configuration calls for them.
//
AM_REGn(WDT, 0, INTEN) |= AM_REG_WDT_INTEN_WDT_M;
}
else
{
//
// Disable the watchdog interrupt if the configuration doesn't call for
// watchdog interrupts.
//
AM_REGn(WDT, 0, INTEN) &= ~AM_REG_WDT_INTEN_WDT_M;
}
//
// If resets should be enabled, set the appropriate bit in the temporary
// variable.
//
if ( bResetEnabled )
{
//
// Also enable watchdog resets in the reset module.
//
AM_REG(RSTGEN, CFG) |= AM_REG_RSTGEN_CFG_WDREN_M;
}
else
{
//
// Disable watchdog resets in the reset module.
//
AM_REG(RSTGEN, CFG) &= ~AM_REG_RSTGEN_CFG_WDREN_M;
}
//
// Check for a user specified clock select. If none specified then
// set 128Hz.
//
if ( !(psConfig->ui32Config & AM_REG_WDT_CFG_CLKSEL_M) )
{
ui32ConfigVal |= AM_REG_WDT_CFG_CLKSEL_128HZ;
}
//
// Write the saved value to the watchdog configuration register.
//
AM_REGn(WDT, 0, CFG) = ui32ConfigVal;
}