288 lines
8.6 KiB
C
288 lines
8.6 KiB
C
//*****************************************************************************
|
|
//
|
|
// am_hal_vcomp.c
|
|
//! @file
|
|
//!
|
|
//! @brief Functions for operating the on-chip Voltage Comparator
|
|
//!
|
|
//! @addtogroup vcomp2 Voltage Comparator (VCOMP)
|
|
//! @ingroup apollo2hal
|
|
//! @{
|
|
//
|
|
//*****************************************************************************
|
|
|
|
//*****************************************************************************
|
|
//
|
|
// Copyright (c) 2017, Ambiq Micro
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice,
|
|
// this list of conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright
|
|
// notice, this list of conditions and the following disclaimer in the
|
|
// documentation and/or other materials provided with the distribution.
|
|
//
|
|
// 3. Neither the name of the copyright holder nor the names of its
|
|
// contributors may be used to endorse or promote products derived from this
|
|
// software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
// POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// This is part of revision 1.2.9 of the AmbiqSuite Development Package.
|
|
//
|
|
//*****************************************************************************
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include "am_mcu_apollo.h"
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Configure the Voltage Comparator module.
|
|
//!
|
|
//! @param psConfig is a structure containing configuration information for the
|
|
//! voltage comparator.
|
|
//!
|
|
//! This function configures the positive and negative input signals for the
|
|
//! voltage comparator.
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_config(const am_hal_vcomp_config_t *psConfig)
|
|
{
|
|
//
|
|
// The configuration word should be a simple OR of the components of the
|
|
// configuration structure.
|
|
//
|
|
AM_REG(VCOMP, CFG) = (psConfig->ui32LevelSelect |
|
|
psConfig->ui32PosInput |
|
|
psConfig->ui32NegInput);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Set the Voltage Comparator DAC Level Select in Configuration Reg.
|
|
//!
|
|
//! @param ui32Level - DAC voltage selector (use macros enumerations)
|
|
//!
|
|
//! This function sets the DAC level select in the configuration register.
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_dac_level_set(uint32_t ui32Level)
|
|
{
|
|
//
|
|
// Insert the supplied level into the vcomp configuration register
|
|
//
|
|
AM_BFW(VCOMP, CFG, LVLSEL, ui32Level >> AM_REG_VCOMP_CFG_LVLSEL_S);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Read the state of the voltage comparator.
|
|
//!
|
|
//! This function extracts the comparator state from the status register.
|
|
//!
|
|
//! @return the voltage comparator state
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_vcomp_read(void)
|
|
{
|
|
return (AM_BFR(VCOMP, STAT, CMPOUT) == 1);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Enable the voltage comparator.
|
|
//!
|
|
//! This function powers up the voltage comparator.
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_enable(void)
|
|
{
|
|
AM_REG(VCOMP, PWDKEY) = 0;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Disable the voltage comparator.
|
|
//!
|
|
//! This function powers down the voltage comparator.
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_disable(void)
|
|
{
|
|
AM_REG(VCOMP, PWDKEY) = AM_REG_VCOMP_PWDKEY_KEYVAL;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Read the state of the voltage comparator interrupt status bits.
|
|
//!
|
|
//! @param bEnabledOnly - return the status of only the enabled interrupts.
|
|
//!
|
|
//! This function extracts the interrupt status bits and returns the raw or
|
|
//! only the enabled based on bEnabledOnly.
|
|
//!
|
|
//! @return Bitwise representation of the current interrupt status.
|
|
//!
|
|
//! The return value will be the logical OR of one or more of the following
|
|
//! values:
|
|
//!
|
|
//! AM_HAL_VCOMP_INT_OUTHI
|
|
//! AM_HAL_VCOMP_INT_OUTLO
|
|
//
|
|
//*****************************************************************************
|
|
uint32_t
|
|
am_hal_vcomp_int_status_get(bool bEnabledOnly)
|
|
{
|
|
if (bEnabledOnly)
|
|
{
|
|
uint32_t u32RetVal = AM_REG(VCOMP, INTSTAT);
|
|
return u32RetVal & AM_REG(VCOMP, INTEN);
|
|
}
|
|
else
|
|
{
|
|
return AM_REG(VCOMP, INTSTAT);
|
|
}
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Set the state of the voltage comparator interrupt status bits.
|
|
//!
|
|
//! @param ui32Interrupt - interrupts to be set.
|
|
//!
|
|
//! This function sets the specified interrupt status bits.
|
|
//!
|
|
//! ui32Interrupt should be a logical or of:
|
|
//!
|
|
//! AM_HAL_VCOMP_INT_OUTHI
|
|
//! AM_HAL_VCOMP_INT_OUTLO
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_int_set(uint32_t ui32Interrupt)
|
|
{
|
|
AM_REG(VCOMP, INTSET) = ui32Interrupt;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Clear the state of the voltage comparator interrupt status bits.
|
|
//!
|
|
//! @param ui32Interrupt - interrupts to be cleared.
|
|
//!
|
|
//! This function clears the specified interrupt status bits.
|
|
//!
|
|
//! ui32Interrupt should be a logical or of:
|
|
//!
|
|
//! AM_HAL_VCOMP_INT_OUTHI
|
|
//! AM_HAL_VCOMP_INT_OUTLO
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_int_clear(uint32_t ui32Interrupt)
|
|
{
|
|
AM_REG(VCOMP, INTCLR) = ui32Interrupt;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Enable the voltage comparator interrupt status bits.
|
|
//!
|
|
//! @param ui32Interrupt - interrupts to be enabled.
|
|
//!
|
|
//! This function enables desired interrupt status bits.
|
|
//!
|
|
//! ui32Interrupt should be a logical or of:
|
|
//!
|
|
//! AM_HAL_VCOMP_INT_OUTHI
|
|
//! AM_HAL_VCOMP_INT_OUTLO
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_int_enable(uint32_t ui32Interrupt)
|
|
{
|
|
AM_REG(VCOMP, INTEN) |= ui32Interrupt;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Return the enabled, voltage comparator interrupt status bits.
|
|
//!
|
|
//! This function returns the enabled interrupt status bits
|
|
//!
|
|
//! @return returns the enabled interrupt status bits. The return is a logical
|
|
//! or of:
|
|
//!
|
|
//! AM_HAL_VCOMP_INT_OUTHI
|
|
//! AM_HAL_VCOMP_INT_OUTLO
|
|
//
|
|
//*****************************************************************************
|
|
uint32_t
|
|
am_hal_vcomp_int_enable_get(void)
|
|
{
|
|
return AM_REG(VCOMP, INTEN);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Disable the voltage comparator interrupt status bits.
|
|
//!
|
|
//! @param ui32Interrupt - interrupts to be disabled.
|
|
//!
|
|
//! This function disables desired interrupt status bits.
|
|
//!
|
|
//! ui32Interrupt should be a logical or of:
|
|
//!
|
|
//! AM_HAL_VCOMP_INT_OUTHI
|
|
//! AM_HAL_VCOMP_INT_OUTLO
|
|
//!
|
|
//! @return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
am_hal_vcomp_int_disable(uint32_t ui32Interrupt)
|
|
{
|
|
AM_REG(VCOMP, INTEN) &= ~ui32Interrupt;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
// End Doxygen group.
|
|
//! @}
|
|
//
|
|
//*****************************************************************************
|