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micro_climate/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c

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2024-07-05 03:52:43 +00:00
/**
******************************************************************************
* @file stm32l4xx_hal_opamp.c
* @author MCD Application Team
* @brief OPAMP HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of the operational amplifier(s) peripheral:
* + Initialization and de-initialization functions
* + IO operation functions
* + Peripheral Control functions
* + Peripheral State functions
*
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@verbatim
================================================================================
##### OPAMP Peripheral Features #####
================================================================================
[..] The device integrates 1 or 2 operational amplifiers OPAMP1 & OPAMP2
(#) The OPAMP(s) provide(s) several exclusive running modes.
(++) 1 OPAMP: STM32L412xx STM32L422xx STM32L431xx STM32L432xx STM32L433xx STM32L442xx STM32L443xx
(++) 2 OPAMP: STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx
(#) The OPAMP(s) provide(s) several exclusive running modes.
(++) Standalone mode
(++) Programmable Gain Amplifier (PGA) mode (Resistor feedback output)
(++) Follower mode
(#) All OPAMP (same for all OPAMPs) can operate in
(++) Either Low range (VDDA < 2.4V) power supply
(++) Or High range (VDDA > 2.4V) power supply
(#) Each OPAMP(s) can be configured in normal and low power mode.
(#) The OPAMP(s) provide(s) calibration capabilities.
(++) Calibration aims at correcting some offset for running mode.
(++) The OPAMP uses either factory calibration settings OR user defined
calibration (trimming) settings (i.e. trimming mode).
(++) The user defined settings can be figured out using self calibration
handled by HAL_OPAMP_SelfCalibrate, HAL_OPAMPEx_SelfCalibrateAll
(++) HAL_OPAMP_SelfCalibrate:
(+++) Runs automatically the calibration.
(+++) Enables the user trimming mode
(+++) Updates the init structure with trimming values with fresh calibration
results.
The user may store the calibration results for larger
(ex monitoring the trimming as a function of temperature
for instance)
(+++) HAL_OPAMPEx_SelfCalibrateAll
runs calibration of all OPAMPs in parallel to save search time.
(#) Running mode: Standalone mode
(++) Gain is set externally (gain depends on external loads).
(++) Follower mode also possible externally by connecting the inverting input to
the output.
(#) Running mode: Follower mode
(++) No Inverting Input is connected.
(#) Running mode: Programmable Gain Amplifier (PGA) mode
(Resistor feedback output)
(++) The OPAMP(s) output(s) can be internally connected to resistor feedback
output.
(++) OPAMP gain is either 2, 4, 8 or 16.
(#) The OPAMPs inverting input can be selected according to the Reference Manual
"OPAMP function description" chapter.
(#) The OPAMPs non inverting input can be selected according to the Reference Manual
"OPAMP function description" chapter.
##### How to use this driver #####
================================================================================
[..]
*** Power supply range ***
============================================
[..] To run in low power mode:
(#) Configure the OPAMP using HAL_OPAMP_Init() function:
(++) Select OPAMP_POWERSUPPLY_LOW (VDDA lower than 2.4V)
(++) Otherwise select OPAMP_POWERSUPPLY_HIGH (VDDA higher than 2.4V)
*** Low / normal power mode ***
============================================
[..] To run in low power mode:
(#) Configure the OPAMP using HAL_OPAMP_Init() function:
(++) Select OPAMP_POWERMODE_LOWPOWER
(++) Otherwise select OPAMP_POWERMODE_NORMALPOWER
*** Calibration ***
============================================
[..] To run the OPAMP calibration self calibration:
(#) Start calibration using HAL_OPAMP_SelfCalibrate.
Store the calibration results.
*** Running mode ***
============================================
[..] To use the OPAMP, perform the following steps:
(#) Fill in the HAL_OPAMP_MspInit() to
(++) Enable the OPAMP Peripheral clock using macro __HAL_RCC_OPAMP_CLK_ENABLE()
(++) Configure the OPAMP input AND output in analog mode using
HAL_GPIO_Init() to map the OPAMP output to the GPIO pin.
(#) Registrate Callbacks
(++) The compilation define USE_HAL_OPAMP_REGISTER_CALLBACKS when set to 1
allows the user to configure dynamically the driver callbacks.
(++) Use Functions HAL_OPAMP_RegisterCallback() to register a user callback,
it allows to register following callbacks:
(+++) MspInitCallback : OPAMP MspInit.
(+++) MspDeInitCallback : OPAMP MspFeInit.
This function takes as parameters the HAL peripheral handle, the Callback ID
and a pointer to the user callback function.
(++) Use function HAL_OPAMP_UnRegisterCallback() to reset a callback to the default
weak (overridden) function. It allows to reset following callbacks:
(+++) MspInitCallback : OPAMP MspInit.
(+++) MspDeInitCallback : OPAMP MspdeInit.
(+++) All Callbacks
(#) Configure the OPAMP using HAL_OPAMP_Init() function:
(++) Select the mode
(++) Select the inverting input
(++) Select the non-inverting input
(++) If PGA mode is enabled, Select if inverting input is connected.
(++) Select either factory or user defined trimming mode.
(++) If the user-defined trimming mode is enabled, select PMOS & NMOS trimming values
(typically values set by HAL_OPAMP_SelfCalibrate function).
(#) Enable the OPAMP using HAL_OPAMP_Start() function.
(#) Disable the OPAMP using HAL_OPAMP_Stop() function.
(#) Lock the OPAMP in running mode using HAL_OPAMP_Lock() function.
Caution: On STM32L4, HAL OPAMP lock is software lock only (not
hardware lock as on some other STM32 devices)
(#) If needed, unlock the OPAMP using HAL_OPAMPEx_Unlock() function.
*** Running mode: change of configuration while OPAMP ON ***
============================================
[..] To Re-configure OPAMP when OPAMP is ON (change on the fly)
(#) If needed, fill in the HAL_OPAMP_MspInit()
(++) This is the case for instance if you wish to use new OPAMP I/O
(#) Configure the OPAMP using HAL_OPAMP_Init() function:
(++) As in configure case, select first the parameters you wish to modify.
(#) Change from low power mode to normal power mode (& vice versa) requires
first HAL_OPAMP_DeInit() (force OPAMP OFF) and then HAL_OPAMP_Init().
In other words, of OPAMP is ON, HAL_OPAMP_Init can NOT change power mode
alone.
@endverbatim
******************************************************************************
Table 1. OPAMPs inverting/non-inverting inputs for the STM32L4 devices:
+------------------------------------------------------------------------|
| | | OPAMP1 | OPAMP2 |
|-----------------|---------|----------------------|---------------------|
| Inverting Input | VM_SEL | | |
| | | IO0-> PA1 | IO0-> PA7 |
| | | LOW LEAKAGE IO (2) | LOW LEAKAGE IO (2) |
| | | Not connected | Not connected |
| (1) | | PGA mode only | PGA mode only |
|-----------------|---------|----------------------|---------------------|
| Non Inverting | VP_SEL | | |
| | | IO0-> PA0 (GPIO) | IO0-> PA6 (GPIO) |
| Input | | DAC1_OUT1 internal | DAC1_OUT2 internal |
+------------------------------------------------------------------------|
(1): NA in follower mode.
(2): Available on some package only (ex. BGA132).
Table 2. OPAMPs outputs for the STM32L4 devices:
+-------------------------------------------------------------------------
| | | OPAMP1 | OPAMP2 |
|-----------------|--------|-----------------------|---------------------|
| Output | VOUT | PA3 | PB0 |
| | | & (1) ADC12_IN if | & (1) ADC12_IN if |
| | | connected internally | connected internally|
|-----------------|--------|-----------------------|---------------------|
(1): ADC1 or ADC2 shall select IN15.
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx_hal.h"
/** @addtogroup STM32L4xx_HAL_Driver
* @{
*/
/** @defgroup OPAMP OPAMP
* @brief OPAMP module driver
* @{
*/
#ifdef HAL_OPAMP_MODULE_ENABLED
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/** @addtogroup OPAMP_Private_Constants
* @{
*/
/* CSR register reset value */
#define OPAMP_CSR_RESET_VALUE ((uint32_t)0x00000000)
#define OPAMP_CSR_RESET_BITS (OPAMP_CSR_OPAMPxEN | OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE \
| OPAMP_CSR_PGGAIN | OPAMP_CSR_VMSEL | OPAMP_CSR_VPSEL \
| OPAMP_CSR_CALON | OPAMP_CSR_USERTRIM)
/* CSR Init masks */
#define OPAMP_CSR_INIT_MASK_PGA (OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE| OPAMP_CSR_PGGAIN \
| OPAMP_CSR_VMSEL | OPAMP_CSR_VPSEL | OPAMP_CSR_USERTRIM)
#define OPAMP_CSR_INIT_MASK_FOLLOWER (OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE| OPAMP_CSR_VPSEL \
| OPAMP_CSR_USERTRIM)
#define OPAMP_CSR_INIT_MASK_STANDALONE (OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE| OPAMP_CSR_VPSEL \
| OPAMP_CSR_VMSEL | OPAMP_CSR_USERTRIM)
/**
* @}
*/
/* Private macros ------------------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup OPAMP_Exported_Functions OPAMP Exported Functions
* @{
*/
/** @defgroup OPAMP_Exported_Functions_Group1 Initialization and de-initialization functions
* @brief Initialization and Configuration functions
*
@verbatim
==============================================================================
##### Initialization and de-initialization functions #####
==============================================================================
@endverbatim
* @{
*/
/**
* @brief Initializes the OPAMP according to the specified
* parameters in the OPAMP_InitTypeDef and initialize the associated handle.
* @note If the selected opamp is locked, initialization can't be performed.
* To unlock the configuration, perform a system reset.
* @param hopamp OPAMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMP_Init(OPAMP_HandleTypeDef *hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
uint32_t updateotrlpotr;
/* Check the OPAMP handle allocation and lock status */
/* Init not allowed if calibration is ongoing */
if(hopamp == NULL)
{
return HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED)
{
return HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_CALIBBUSY)
{
return HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
/* Set OPAMP parameters */
assert_param(IS_OPAMP_POWER_SUPPLY_RANGE(hopamp->Init.PowerSupplyRange));
assert_param(IS_OPAMP_POWERMODE(hopamp->Init.PowerMode));
assert_param(IS_OPAMP_FUNCTIONAL_NORMALMODE(hopamp->Init.Mode));
assert_param(IS_OPAMP_NONINVERTING_INPUT(hopamp->Init.NonInvertingInput));
#if (USE_HAL_OPAMP_REGISTER_CALLBACKS == 1)
if(hopamp->State == HAL_OPAMP_STATE_RESET)
{
if(hopamp->MspInitCallback == NULL)
{
hopamp->MspInitCallback = HAL_OPAMP_MspInit;
}
}
#endif /* USE_HAL_OPAMP_REGISTER_CALLBACKS */
if ((hopamp->Init.Mode) == OPAMP_STANDALONE_MODE)
{
assert_param(IS_OPAMP_INVERTING_INPUT_STANDALONE(hopamp->Init.InvertingInput));
}
if ((hopamp->Init.Mode) == OPAMP_PGA_MODE)
{
assert_param(IS_OPAMP_INVERTING_INPUT_PGA(hopamp->Init.InvertingInput));
}
if ((hopamp->Init.Mode) == OPAMP_PGA_MODE)
{
assert_param(IS_OPAMP_PGA_GAIN(hopamp->Init.PgaGain));
}
assert_param(IS_OPAMP_TRIMMING(hopamp->Init.UserTrimming));
if ((hopamp->Init.UserTrimming) == OPAMP_TRIMMING_USER)
{
if (hopamp->Init.PowerMode == OPAMP_POWERMODE_NORMALPOWER)
{
assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueP));
assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueN));
}
else
{
assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValuePLowPower));
assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueNLowPower));
}
}
if(hopamp->State == HAL_OPAMP_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hopamp->Lock = HAL_UNLOCKED;
}
#if (USE_HAL_OPAMP_REGISTER_CALLBACKS == 1)
hopamp->MspInitCallback(hopamp);
#else
/* Call MSP init function */
HAL_OPAMP_MspInit(hopamp);
#endif /* USE_HAL_OPAMP_REGISTER_CALLBACKS */
/* Set operating mode */
CLEAR_BIT(hopamp->Instance->CSR, OPAMP_CSR_CALON);
if (hopamp->Init.Mode == OPAMP_PGA_MODE)
{
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_INIT_MASK_PGA, \
hopamp->Init.PowerMode | \
hopamp->Init.Mode | \
hopamp->Init.PgaGain | \
hopamp->Init.InvertingInput | \
hopamp->Init.NonInvertingInput | \
hopamp->Init.UserTrimming);
}
if (hopamp->Init.Mode == OPAMP_FOLLOWER_MODE)
{
/* In Follower mode InvertingInput is Not Applicable */
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_INIT_MASK_FOLLOWER, \
hopamp->Init.PowerMode | \
hopamp->Init.Mode | \
hopamp->Init.NonInvertingInput | \
hopamp->Init.UserTrimming);
}
if (hopamp->Init.Mode == OPAMP_STANDALONE_MODE)
{
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_INIT_MASK_STANDALONE, \
hopamp->Init.PowerMode | \
hopamp->Init.Mode | \
hopamp->Init.InvertingInput | \
hopamp->Init.NonInvertingInput | \
hopamp->Init.UserTrimming);
}
if (hopamp->Init.UserTrimming == OPAMP_TRIMMING_USER)
{
/* Set power mode and associated calibration parameters */
if (hopamp->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
{
/* OPAMP_POWERMODE_NORMALPOWER */
/* Set calibration mode (factory or user) and values for */
/* transistors differential pair high (PMOS) and low (NMOS) for */
/* normal mode. */
updateotrlpotr = (((hopamp->Init.TrimmingValueP) << (OPAMP_INPUT_NONINVERTING)) \
| (hopamp->Init.TrimmingValueN));
MODIFY_REG(hopamp->Instance->OTR, OPAMP_OTR_TRIMOFFSETN | OPAMP_OTR_TRIMOFFSETP, updateotrlpotr);
}
else
{
/* OPAMP_POWERMODE_LOWPOWER */
/* transistors differential pair high (PMOS) and low (NMOS) for */
/* low power mode. */
updateotrlpotr = (((hopamp->Init.TrimmingValuePLowPower) << (OPAMP_INPUT_NONINVERTING)) \
| (hopamp->Init.TrimmingValueNLowPower));
MODIFY_REG(hopamp->Instance->LPOTR, OPAMP_OTR_TRIMOFFSETN | OPAMP_OTR_TRIMOFFSETP, updateotrlpotr);
}
}
/* Configure the power supply range */
/* The OPAMP_CSR_OPARANGE is common configuration for all OPAMPs */
/* bit OPAMP1_CSR_OPARANGE is used for both OPAMPs */
MODIFY_REG(OPAMP1->CSR, OPAMP1_CSR_OPARANGE, hopamp->Init.PowerSupplyRange);
/* Update the OPAMP state*/
if (hopamp->State == HAL_OPAMP_STATE_RESET)
{
/* From RESET state to READY State */
hopamp->State = HAL_OPAMP_STATE_READY;
}
/* else: remain in READY or BUSY state (no update) */
return status;
}
}
/**
* @brief DeInitialize the OPAMP peripheral.
* @note Deinitialization can be performed if the OPAMP configuration is locked.
* (the lock is SW in L4)
* @param hopamp OPAMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMP_DeInit(OPAMP_HandleTypeDef *hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the OPAMP handle allocation */
/* DeInit not allowed if calibration is ongoing */
if(hopamp == NULL)
{
status = HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_CALIBBUSY)
{
status = HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
/* Set OPAMP_CSR register to reset value */
/* Mind that OPAMP1_CSR_OPARANGE of CSR of OPAMP1 remains unchanged (applies to both OPAMPs) */
/* OPAMP shall be disabled first separately */
CLEAR_BIT(hopamp->Instance->CSR, OPAMP_CSR_OPAMPxEN);
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_RESET_BITS, OPAMP_CSR_RESET_VALUE);
#if (USE_HAL_OPAMP_REGISTER_CALLBACKS == 1)
if(hopamp->MspDeInitCallback == NULL)
{
hopamp->MspDeInitCallback = HAL_OPAMP_MspDeInit;
}
/* DeInit the low level hardware */
hopamp->MspDeInitCallback(hopamp);
#else
/* DeInit the low level hardware: GPIO, CLOCK and NVIC */
HAL_OPAMP_MspDeInit(hopamp);
#endif /* USE_HAL_OPAMP_REGISTER_CALLBACKS */
/* Update the OPAMP state*/
hopamp->State = HAL_OPAMP_STATE_RESET;
/* Process unlocked */
__HAL_UNLOCK(hopamp);
}
return status;
}
/**
* @brief Initialize the OPAMP MSP.
* @param hopamp OPAMP handle
* @retval None
*/
__weak void HAL_OPAMP_MspInit(OPAMP_HandleTypeDef *hopamp)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hopamp);
/* NOTE : This function should not be modified, when the callback is needed,
the function "HAL_OPAMP_MspInit()" must be implemented in the user file.
*/
}
/**
* @brief DeInitialize OPAMP MSP.
* @param hopamp OPAMP handle
* @retval None
*/
__weak void HAL_OPAMP_MspDeInit(OPAMP_HandleTypeDef *hopamp)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hopamp);
/* NOTE : This function should not be modified, when the callback is needed,
the function "HAL_OPAMP_MspDeInit()" must be implemented in the user file.
*/
}
/**
* @}
*/
/** @defgroup OPAMP_Exported_Functions_Group2 IO operation functions
* @brief IO operation functions
*
@verbatim
===============================================================================
##### IO operation functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to manage the OPAMP
start, stop and calibration actions.
@endverbatim
* @{
*/
/**
* @brief Start the OPAMP.
* @param hopamp OPAMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMP_Start(OPAMP_HandleTypeDef *hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the OPAMP handle allocation */
/* Check if OPAMP locked */
if(hopamp == NULL)
{
status = HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED)
{
status = HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
if(hopamp->State == HAL_OPAMP_STATE_READY)
{
/* Enable the selected opamp */
SET_BIT (hopamp->Instance->CSR, OPAMP_CSR_OPAMPxEN);
/* Update the OPAMP state*/
/* From HAL_OPAMP_STATE_READY to HAL_OPAMP_STATE_BUSY */
hopamp->State = HAL_OPAMP_STATE_BUSY;
}
else
{
status = HAL_ERROR;
}
}
return status;
}
/**
* @brief Stop the OPAMP.
* @param hopamp OPAMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMP_Stop(OPAMP_HandleTypeDef *hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the OPAMP handle allocation */
/* Check if OPAMP locked */
/* Check if OPAMP calibration ongoing */
if(hopamp == NULL)
{
status = HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED)
{
status = HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_CALIBBUSY)
{
status = HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
if(hopamp->State == HAL_OPAMP_STATE_BUSY)
{
/* Disable the selected opamp */
CLEAR_BIT (hopamp->Instance->CSR, OPAMP_CSR_OPAMPxEN);
/* Update the OPAMP state*/
/* From HAL_OPAMP_STATE_BUSY to HAL_OPAMP_STATE_READY*/
hopamp->State = HAL_OPAMP_STATE_READY;
}
else
{
status = HAL_ERROR;
}
}
return status;
}
/**
* @brief Run the self calibration of one OPAMP.
* @note Calibration is performed in the mode specified in OPAMP init
* structure (mode normal or low-power). To perform calibration for
* both modes, repeat this function twice after OPAMP init structure
* accordingly updated.
* @note Calibration runs about 10 ms.
* @param hopamp handle
* @retval Updated offset trimming values (PMOS & NMOS), user trimming is enabled
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMP_SelfCalibrate(OPAMP_HandleTypeDef *hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
uint32_t trimmingvaluen;
uint32_t trimmingvaluep;
uint32_t delta;
uint32_t opampmode;
__IO uint32_t* tmp_opamp_reg_trimming; /* Selection of register of trimming depending on power mode: OTR or LPOTR */
/* Check the OPAMP handle allocation */
/* Check if OPAMP locked */
if(hopamp == NULL)
{
status = HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED)
{
status = HAL_ERROR;
}
else
{
/* Check if OPAMP in calibration mode and calibration not yet enable */
if(hopamp->State == HAL_OPAMP_STATE_READY)
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
assert_param(IS_OPAMP_POWERMODE(hopamp->Init.PowerMode));
/* Save OPAMP mode as in */
/* STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx */
/* the calibration is not working in PGA mode */
opampmode = READ_BIT(hopamp->Instance->CSR,OPAMP_CSR_OPAMODE);
/* Use of standalone mode */
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_OPAMODE, OPAMP_STANDALONE_MODE);
/* user trimming values are used for offset calibration */
SET_BIT(hopamp->Instance->CSR, OPAMP_CSR_USERTRIM);
/* Select trimming settings depending on power mode */
if (hopamp->Init.PowerMode == OPAMP_POWERMODE_NORMALPOWER)
{
tmp_opamp_reg_trimming = &hopamp->Instance->OTR;
}
else
{
tmp_opamp_reg_trimming = &hopamp->Instance->LPOTR;
}
/* Enable calibration */
SET_BIT (hopamp->Instance->CSR, OPAMP_CSR_CALON);
/* 1st calibration - N */
CLEAR_BIT (hopamp->Instance->CSR, OPAMP_CSR_CALSEL);
/* Enable the selected opamp */
SET_BIT (hopamp->Instance->CSR, OPAMP_CSR_OPAMPxEN);
/* Init trimming counter */
/* Medium value */
trimmingvaluen = 16U;
delta = 8U;
while (delta != 0U)
{
/* Set candidate trimming */
/* OPAMP_POWERMODE_NORMALPOWER */
MODIFY_REG(*tmp_opamp_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen);
/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
/* Offset trim time: during calibration, minimum time needed between */
/* two steps to have 1 mV accuracy */
HAL_Delay(OPAMP_TRIMMING_DELAY);
if (READ_BIT(hopamp->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
{
/* OPAMP_CSR_CALOUT is HIGH try higher trimming */
trimmingvaluen -= delta;
}
else
{
/* OPAMP_CSR_CALOUT is LOW try lower trimming */
trimmingvaluen += delta;
}
/* Divide range by 2 to continue dichotomy sweep */
delta >>= 1U;
}
/* Still need to check if right calibration is current value or one step below */
/* Indeed the first value that causes the OUTCAL bit to change from 0 to 1 */
/* Set candidate trimming */
MODIFY_REG(*tmp_opamp_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen);
/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
/* Offset trim time: during calibration, minimum time needed between */
/* two steps to have 1 mV accuracy */
HAL_Delay(OPAMP_TRIMMING_DELAY);
if ((READ_BIT(hopamp->Instance->CSR, OPAMP_CSR_CALOUT)) == 0U)
{
/* Trimming value is actually one value more */
trimmingvaluen++;
/* Set right trimming */
MODIFY_REG(*tmp_opamp_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen);
}
/* 2nd calibration - P */
SET_BIT (hopamp->Instance->CSR, OPAMP_CSR_CALSEL);
/* Init trimming counter */
/* Medium value */
trimmingvaluep = 16U;
delta = 8U;
while (delta != 0U)
{
/* Set candidate trimming */
/* OPAMP_POWERMODE_NORMALPOWER */
MODIFY_REG(*tmp_opamp_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep<<OPAMP_INPUT_NONINVERTING));
/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
/* Offset trim time: during calibration, minimum time needed between */
/* two steps to have 1 mV accuracy */
HAL_Delay(OPAMP_TRIMMING_DELAY);
if (READ_BIT(hopamp->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
{
/* OPAMP_CSR_CALOUT is HIGH try higher trimming */
trimmingvaluep += delta;
}
else
{
/* OPAMP_CSR_CALOUT is LOW try lower trimming */
trimmingvaluep -= delta;
}
/* Divide range by 2 to continue dichotomy sweep */
delta >>= 1U;
}
/* Still need to check if right calibration is current value or one step below */
/* Indeed the first value that causes the OUTCAL bit to change from 1 to 0 */
/* Set candidate trimming */
MODIFY_REG(*tmp_opamp_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep<<OPAMP_INPUT_NONINVERTING));
/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
/* Offset trim time: during calibration, minimum time needed between */
/* two steps to have 1 mV accuracy */
HAL_Delay(OPAMP_TRIMMING_DELAY);
if (READ_BIT(hopamp->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
{
/* Trimming value is actually one value more */
trimmingvaluep++;
MODIFY_REG(*tmp_opamp_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep<<OPAMP_INPUT_NONINVERTING));
}
/* Disable the OPAMP */
CLEAR_BIT (hopamp->Instance->CSR, OPAMP_CSR_OPAMPxEN);
/* Disable calibration & set normal mode (operating mode) */
CLEAR_BIT (hopamp->Instance->CSR, OPAMP_CSR_CALON);
/* Self calibration is successful */
/* Store calibration(user trimming) results in init structure. */
/* Set user trimming mode */
hopamp->Init.UserTrimming = OPAMP_TRIMMING_USER;
/* Affect calibration parameters depending on mode normal/low power */
if (hopamp->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
{
/* Write calibration result N */
hopamp->Init.TrimmingValueN = trimmingvaluen;
/* Write calibration result P */
hopamp->Init.TrimmingValueP = trimmingvaluep;
}
else
{
/* Write calibration result N */
hopamp->Init.TrimmingValueNLowPower = trimmingvaluen;
/* Write calibration result P */
hopamp->Init.TrimmingValuePLowPower = trimmingvaluep;
}
/* Restore OPAMP mode after calibration */
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_OPAMODE, opampmode);
}
else
{
/* OPAMP can not be calibrated from this mode */
status = HAL_ERROR;
}
}
return status;
}
/**
* @}
*/
/** @defgroup OPAMP_Exported_Functions_Group3 Peripheral Control functions
* @brief Peripheral Control functions
*
@verbatim
===============================================================================
##### Peripheral Control functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to control the OPAMP data
transfers.
@endverbatim
* @{
*/
/**
* @brief Lock the selected OPAMP configuration.
* @note On STM32L4, HAL OPAMP lock is software lock only (in
* contrast of hardware lock available on some other STM32
* devices).
* @param hopamp OPAMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMP_Lock(OPAMP_HandleTypeDef *hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the OPAMP handle allocation */
/* Check if OPAMP locked */
/* OPAMP can be locked when enabled and running in normal mode */
/* It is meaningless otherwise */
if(hopamp == NULL)
{
status = HAL_ERROR;
}
else if(hopamp->State == HAL_OPAMP_STATE_BUSY)
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
/* OPAMP state changed to locked */
hopamp->State = HAL_OPAMP_STATE_BUSYLOCKED;
}
else
{
status = HAL_ERROR;
}
return status;
}
/**
* @brief Return the OPAMP factory trimming value.
* @note On STM32L4 OPAMP, user can retrieve factory trimming if
* OPAMP has never been set to user trimming before.
* Therefore, this function must be called when OPAMP init
* parameter "UserTrimming" is set to trimming factory,
* and before OPAMP calibration (function
* "HAL_OPAMP_SelfCalibrate()").
* Otherwise, factory trimming value cannot be retrieved and
* error status is returned.
* @param hopamp : OPAMP handle
* @param trimmingoffset : Trimming offset (P or N)
* This parameter must be a value of @ref OPAMP_FactoryTrimming
* @note Calibration parameter retrieved is corresponding to the mode
* specified in OPAMP init structure (mode normal or low-power).
* To retrieve calibration parameters for both modes, repeat this
* function after OPAMP init structure accordingly updated.
* @retval Trimming value (P or N): range: 0->31
* or OPAMP_FACTORYTRIMMING_DUMMY if trimming value is not available
*
*/
HAL_OPAMP_TrimmingValueTypeDef HAL_OPAMP_GetTrimOffset (OPAMP_HandleTypeDef *hopamp, uint32_t trimmingoffset)
{
HAL_OPAMP_TrimmingValueTypeDef trimmingvalue;
__IO uint32_t* tmp_opamp_reg_trimming; /* Selection of register of trimming depending on power mode: OTR or LPOTR */
/* Check the OPAMP handle allocation */
/* Value can be retrieved in HAL_OPAMP_STATE_READY state */
if(hopamp == NULL)
{
return OPAMP_FACTORYTRIMMING_DUMMY;
}
/* Check the OPAMP handle allocation */
/* Value can be retrieved in HAL_OPAMP_STATE_READY state */
if(hopamp->State == HAL_OPAMP_STATE_READY)
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
assert_param(IS_OPAMP_FACTORYTRIMMING(trimmingoffset));
assert_param(IS_OPAMP_POWERMODE(hopamp->Init.PowerMode));
/* Check the trimming mode */
if (READ_BIT(hopamp->Instance->CSR,OPAMP_CSR_USERTRIM) != 0U)
{
/* This function must called when OPAMP init parameter "UserTrimming" */
/* is set to trimming factory, and before OPAMP calibration (function */
/* "HAL_OPAMP_SelfCalibrate()"). */
/* Otherwise, factory trimming value cannot be retrieved and error */
/* status is returned. */
trimmingvalue = OPAMP_FACTORYTRIMMING_DUMMY;
}
else
{
/* Select trimming settings depending on power mode */
if (hopamp->Init.PowerMode == OPAMP_POWERMODE_NORMALPOWER)
{
tmp_opamp_reg_trimming = &OPAMP->OTR;
}
else
{
tmp_opamp_reg_trimming = &OPAMP->LPOTR;
}
/* Get factory trimming */
if (trimmingoffset == OPAMP_FACTORYTRIMMING_P)
{
/* OPAMP_FACTORYTRIMMING_P */
trimmingvalue = ((*tmp_opamp_reg_trimming) & OPAMP_OTR_TRIMOFFSETP) >> OPAMP_INPUT_NONINVERTING;
}
else
{
/* OPAMP_FACTORYTRIMMING_N */
trimmingvalue = (*tmp_opamp_reg_trimming) & OPAMP_OTR_TRIMOFFSETN;
}
}
}
else
{
return OPAMP_FACTORYTRIMMING_DUMMY;
}
return trimmingvalue;
}
/**
* @}
*/
/** @defgroup OPAMP_Exported_Functions_Group4 Peripheral State functions
* @brief Peripheral State functions
*
@verbatim
===============================================================================
##### Peripheral State functions #####
===============================================================================
[..]
This subsection permits to get in run-time the status of the peripheral.
@endverbatim
* @{
*/
/**
* @brief Return the OPAMP handle state.
* @param hopamp : OPAMP handle
* @retval HAL state
*/
HAL_OPAMP_StateTypeDef HAL_OPAMP_GetState(OPAMP_HandleTypeDef *hopamp)
{
/* Check the OPAMP handle allocation */
if(hopamp == NULL)
{
return HAL_OPAMP_STATE_RESET;
}
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
/* Return OPAMP handle state */
return hopamp->State;
}
/**
* @}
*/
#if (USE_HAL_OPAMP_REGISTER_CALLBACKS == 1)
/**
* @brief Register a User OPAMP Callback
* To be used instead of the weak (overridden) predefined callback
* @param hopamp : OPAMP handle
* @param CallbackID : ID of the callback to be registered
* This parameter can be one of the following values:
* @arg @ref HAL_OPAMP_MSPINIT_CB_ID OPAMP MspInit callback ID
* @arg @ref HAL_OPAMP_MSPDEINIT_CB_ID OPAMP MspDeInit callback ID
* @param pCallback : pointer to the Callback function
* @retval status
*/
HAL_StatusTypeDef HAL_OPAMP_RegisterCallback (OPAMP_HandleTypeDef *hopamp, HAL_OPAMP_CallbackIDTypeDef CallbackID, pOPAMP_CallbackTypeDef pCallback)
{
HAL_StatusTypeDef status = HAL_OK;
if(pCallback == NULL)
{
return HAL_ERROR;
}
/* Process locked */
__HAL_LOCK(hopamp);
if(hopamp->State == HAL_OPAMP_STATE_READY)
{
switch (CallbackID)
{
case HAL_OPAMP_MSPINIT_CB_ID :
hopamp->MspInitCallback = pCallback;
break;
case HAL_OPAMP_MSPDEINIT_CB_ID :
hopamp->MspDeInitCallback = pCallback;
break;
default :
/* update return status */
status = HAL_ERROR;
break;
}
}
else if (hopamp->State == HAL_OPAMP_STATE_RESET)
{
switch (CallbackID)
{
case HAL_OPAMP_MSPINIT_CB_ID :
hopamp->MspInitCallback = pCallback;
break;
case HAL_OPAMP_MSPDEINIT_CB_ID :
hopamp->MspDeInitCallback = pCallback;
break;
default :
/* update return status */
status = HAL_ERROR;
break;
}
}
else
{
/* update return status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(hopamp);
return status;
}
/**
* @brief Unregister a User OPAMP Callback
* OPAMP Callback is redirected to the weak (overridden) predefined callback
* @param hopamp : OPAMP handle
* @param CallbackID : ID of the callback to be unregistered
* This parameter can be one of the following values:
* @arg @ref HAL_OPAMP_MSPINIT_CB_ID OPAMP MSP Init Callback ID
* @arg @ref HAL_OPAMP_MSPDEINIT_CB_ID OPAMP MSP DeInit Callback ID
* @arg @ref HAL_OPAMP_ALL_CB_ID OPAMP All Callbacks
* @retval status
*/
HAL_StatusTypeDef HAL_OPAMP_UnRegisterCallback (OPAMP_HandleTypeDef *hopamp, HAL_OPAMP_CallbackIDTypeDef CallbackID)
{
HAL_StatusTypeDef status = HAL_OK;
/* Process locked */
__HAL_LOCK(hopamp);
if(hopamp->State == HAL_OPAMP_STATE_READY)
{
switch (CallbackID)
{
case HAL_OPAMP_MSPINIT_CB_ID :
hopamp->MspInitCallback = HAL_OPAMP_MspInit;
break;
case HAL_OPAMP_MSPDEINIT_CB_ID :
hopamp->MspDeInitCallback = HAL_OPAMP_MspDeInit;
break;
case HAL_OPAMP_ALL_CB_ID :
hopamp->MspInitCallback = HAL_OPAMP_MspInit;
hopamp->MspDeInitCallback = HAL_OPAMP_MspDeInit;
break;
default :
/* update return status */
status = HAL_ERROR;
break;
}
}
else if (hopamp->State == HAL_OPAMP_STATE_RESET)
{
switch (CallbackID)
{
case HAL_OPAMP_MSPINIT_CB_ID :
hopamp->MspInitCallback = HAL_OPAMP_MspInit;
break;
case HAL_OPAMP_MSPDEINIT_CB_ID :
hopamp->MspDeInitCallback = HAL_OPAMP_MspDeInit;
break;
default :
/* update return status */
status = HAL_ERROR;
break;
}
}
else
{
/* update return status */
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(hopamp);
return status;
}
#endif /* USE_HAL_OPAMP_REGISTER_CALLBACKS */
/**
* @}
*/
/**
* @}
*/
#endif /* HAL_OPAMP_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/