1173 lines
39 KiB
C
1173 lines
39 KiB
C
/**
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******************************************************************************
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* @file stm32l4xx_hal_opamp.c
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* @author MCD Application Team
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* @brief OPAMP HAL module driver.
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* This file provides firmware functions to manage the following
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* functionalities of the operational amplifier(s) peripheral:
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* + Initialization and de-initialization functions
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* + IO operation functions
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* + Peripheral Control functions
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* + Peripheral State functions
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@verbatim
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================================================================================
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##### OPAMP Peripheral Features #####
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================================================================================
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[..] The device integrates 1 or 2 operational amplifiers OPAMP1 & OPAMP2
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(#) The OPAMP(s) provide(s) several exclusive running modes.
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(++) 1 OPAMP: STM32L412xx STM32L422xx STM32L431xx STM32L432xx STM32L433xx STM32L442xx STM32L443xx
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(++) 2 OPAMP: STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx
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(#) The OPAMP(s) provide(s) several exclusive running modes.
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(++) Standalone mode
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(++) Programmable Gain Amplifier (PGA) mode (Resistor feedback output)
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(++) Follower mode
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(#) All OPAMP (same for all OPAMPs) can operate in
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(++) Either Low range (VDDA < 2.4V) power supply
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(++) Or High range (VDDA > 2.4V) power supply
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(#) Each OPAMP(s) can be configured in normal and low power mode.
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(#) The OPAMP(s) provide(s) calibration capabilities.
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(++) Calibration aims at correcting some offset for running mode.
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(++) The OPAMP uses either factory calibration settings OR user defined
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calibration (trimming) settings (i.e. trimming mode).
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(++) The user defined settings can be figured out using self calibration
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handled by HAL_OPAMP_SelfCalibrate, HAL_OPAMPEx_SelfCalibrateAll
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(++) HAL_OPAMP_SelfCalibrate:
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(+++) Runs automatically the calibration.
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(+++) Enables the user trimming mode
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(+++) Updates the init structure with trimming values with fresh calibration
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results.
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The user may store the calibration results for larger
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(ex monitoring the trimming as a function of temperature
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for instance)
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(+++) HAL_OPAMPEx_SelfCalibrateAll
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runs calibration of all OPAMPs in parallel to save search time.
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(#) Running mode: Standalone mode
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(++) Gain is set externally (gain depends on external loads).
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(++) Follower mode also possible externally by connecting the inverting input to
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the output.
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(#) Running mode: Follower mode
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(++) No Inverting Input is connected.
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(#) Running mode: Programmable Gain Amplifier (PGA) mode
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(Resistor feedback output)
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(++) The OPAMP(s) output(s) can be internally connected to resistor feedback
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output.
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(++) OPAMP gain is either 2, 4, 8 or 16.
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(#) The OPAMPs inverting input can be selected according to the Reference Manual
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"OPAMP function description" chapter.
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(#) The OPAMPs non inverting input can be selected according to the Reference Manual
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"OPAMP function description" chapter.
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##### How to use this driver #####
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================================================================================
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[..]
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*** Power supply range ***
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============================================
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[..] To run in low power mode:
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(#) Configure the OPAMP using HAL_OPAMP_Init() function:
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(++) Select OPAMP_POWERSUPPLY_LOW (VDDA lower than 2.4V)
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(++) Otherwise select OPAMP_POWERSUPPLY_HIGH (VDDA higher than 2.4V)
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*** Low / normal power mode ***
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============================================
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[..] To run in low power mode:
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(#) Configure the OPAMP using HAL_OPAMP_Init() function:
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(++) Select OPAMP_POWERMODE_LOWPOWER
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(++) Otherwise select OPAMP_POWERMODE_NORMALPOWER
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*** Calibration ***
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============================================
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[..] To run the OPAMP calibration self calibration:
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(#) Start calibration using HAL_OPAMP_SelfCalibrate.
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Store the calibration results.
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*** Running mode ***
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============================================
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[..] To use the OPAMP, perform the following steps:
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(#) Fill in the HAL_OPAMP_MspInit() to
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(++) Enable the OPAMP Peripheral clock using macro __HAL_RCC_OPAMP_CLK_ENABLE()
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(++) Configure the OPAMP input AND output in analog mode using
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HAL_GPIO_Init() to map the OPAMP output to the GPIO pin.
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(#) Registrate Callbacks
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(++) The compilation define USE_HAL_OPAMP_REGISTER_CALLBACKS when set to 1
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allows the user to configure dynamically the driver callbacks.
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(++) Use Functions HAL_OPAMP_RegisterCallback() to register a user callback,
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it allows to register following callbacks:
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(+++) MspInitCallback : OPAMP MspInit.
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(+++) MspDeInitCallback : OPAMP MspFeInit.
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This function takes as parameters the HAL peripheral handle, the Callback ID
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and a pointer to the user callback function.
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(++) Use function HAL_OPAMP_UnRegisterCallback() to reset a callback to the default
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weak (overridden) function. It allows to reset following callbacks:
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(+++) MspInitCallback : OPAMP MspInit.
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(+++) MspDeInitCallback : OPAMP MspdeInit.
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(+++) All Callbacks
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(#) Configure the OPAMP using HAL_OPAMP_Init() function:
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(++) Select the mode
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(++) Select the inverting input
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(++) Select the non-inverting input
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(++) If PGA mode is enabled, Select if inverting input is connected.
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(++) Select either factory or user defined trimming mode.
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(++) If the user-defined trimming mode is enabled, select PMOS & NMOS trimming values
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(typically values set by HAL_OPAMP_SelfCalibrate function).
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(#) Enable the OPAMP using HAL_OPAMP_Start() function.
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(#) Disable the OPAMP using HAL_OPAMP_Stop() function.
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(#) Lock the OPAMP in running mode using HAL_OPAMP_Lock() function.
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Caution: On STM32L4, HAL OPAMP lock is software lock only (not
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hardware lock as on some other STM32 devices)
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(#) If needed, unlock the OPAMP using HAL_OPAMPEx_Unlock() function.
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*** Running mode: change of configuration while OPAMP ON ***
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============================================
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[..] To Re-configure OPAMP when OPAMP is ON (change on the fly)
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(#) If needed, fill in the HAL_OPAMP_MspInit()
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(++) This is the case for instance if you wish to use new OPAMP I/O
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(#) Configure the OPAMP using HAL_OPAMP_Init() function:
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(++) As in configure case, select first the parameters you wish to modify.
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(#) Change from low power mode to normal power mode (& vice versa) requires
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first HAL_OPAMP_DeInit() (force OPAMP OFF) and then HAL_OPAMP_Init().
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In other words, of OPAMP is ON, HAL_OPAMP_Init can NOT change power mode
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alone.
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@endverbatim
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******************************************************************************
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Table 1. OPAMPs inverting/non-inverting inputs for the STM32L4 devices:
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+------------------------------------------------------------------------|
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| | | OPAMP1 | OPAMP2 |
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|-----------------|---------|----------------------|---------------------|
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| Inverting Input | VM_SEL | | |
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| | | IO0-> PA1 | IO0-> PA7 |
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| | | LOW LEAKAGE IO (2) | LOW LEAKAGE IO (2) |
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| | | Not connected | Not connected |
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| (1) | | PGA mode only | PGA mode only |
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|-----------------|---------|----------------------|---------------------|
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| Non Inverting | VP_SEL | | |
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| | | IO0-> PA0 (GPIO) | IO0-> PA6 (GPIO) |
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| Input | | DAC1_OUT1 internal | DAC1_OUT2 internal |
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+------------------------------------------------------------------------|
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(1): NA in follower mode.
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(2): Available on some package only (ex. BGA132).
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Table 2. OPAMPs outputs for the STM32L4 devices:
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+-------------------------------------------------------------------------
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| | | OPAMP1 | OPAMP2 |
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|-----------------|--------|-----------------------|---------------------|
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| Output | VOUT | PA3 | PB0 |
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| | | & (1) ADC12_IN if | & (1) ADC12_IN if |
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| | | connected internally | connected internally|
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|-----------------|--------|-----------------------|---------------------|
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(1): ADC1 or ADC2 shall select IN15.
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32l4xx_hal.h"
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/** @addtogroup STM32L4xx_HAL_Driver
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* @{
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*/
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/** @defgroup OPAMP OPAMP
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* @brief OPAMP module driver
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* @{
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*/
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#ifdef HAL_OPAMP_MODULE_ENABLED
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/** @addtogroup OPAMP_Private_Constants
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* @{
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*/
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/* CSR register reset value */
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#define OPAMP_CSR_RESET_VALUE ((uint32_t)0x00000000)
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#define OPAMP_CSR_RESET_BITS (OPAMP_CSR_OPAMPxEN | OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE \
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| OPAMP_CSR_PGGAIN | OPAMP_CSR_VMSEL | OPAMP_CSR_VPSEL \
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| OPAMP_CSR_CALON | OPAMP_CSR_USERTRIM)
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/* CSR Init masks */
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#define OPAMP_CSR_INIT_MASK_PGA (OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE| OPAMP_CSR_PGGAIN \
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| OPAMP_CSR_VMSEL | OPAMP_CSR_VPSEL | OPAMP_CSR_USERTRIM)
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#define OPAMP_CSR_INIT_MASK_FOLLOWER (OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE| OPAMP_CSR_VPSEL \
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| OPAMP_CSR_USERTRIM)
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#define OPAMP_CSR_INIT_MASK_STANDALONE (OPAMP_CSR_OPALPM | OPAMP_CSR_OPAMODE| OPAMP_CSR_VPSEL \
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| OPAMP_CSR_VMSEL | OPAMP_CSR_USERTRIM)
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/**
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* @}
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*/
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/* Private macros ------------------------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @defgroup OPAMP_Exported_Functions OPAMP Exported Functions
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* @{
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*/
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/** @defgroup OPAMP_Exported_Functions_Group1 Initialization and de-initialization functions
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* @brief Initialization and Configuration functions
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*
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@verbatim
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==============================================================================
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##### Initialization and de-initialization functions #####
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==============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Initializes the OPAMP according to the specified
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* parameters in the OPAMP_InitTypeDef and initialize the associated handle.
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* @note If the selected opamp is locked, initialization can't be performed.
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* To unlock the configuration, perform a system reset.
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* @param hopamp OPAMP handle
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_OPAMP_Init(OPAMP_HandleTypeDef *hopamp)
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{
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HAL_StatusTypeDef status = HAL_OK;
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uint32_t updateotrlpotr;
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/* Check the OPAMP handle allocation and lock status */
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/* Init not allowed if calibration is ongoing */
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if(hopamp == NULL)
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{
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return HAL_ERROR;
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}
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else if(hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED)
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{
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return HAL_ERROR;
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}
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else if(hopamp->State == HAL_OPAMP_STATE_CALIBBUSY)
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{
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return HAL_ERROR;
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}
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else
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{
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/* Check the parameter */
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assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
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/* Set OPAMP parameters */
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assert_param(IS_OPAMP_POWER_SUPPLY_RANGE(hopamp->Init.PowerSupplyRange));
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assert_param(IS_OPAMP_POWERMODE(hopamp->Init.PowerMode));
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assert_param(IS_OPAMP_FUNCTIONAL_NORMALMODE(hopamp->Init.Mode));
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assert_param(IS_OPAMP_NONINVERTING_INPUT(hopamp->Init.NonInvertingInput));
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#if (USE_HAL_OPAMP_REGISTER_CALLBACKS == 1)
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if(hopamp->State == HAL_OPAMP_STATE_RESET)
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{
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if(hopamp->MspInitCallback == NULL)
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{
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hopamp->MspInitCallback = HAL_OPAMP_MspInit;
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}
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}
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#endif /* USE_HAL_OPAMP_REGISTER_CALLBACKS */
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if ((hopamp->Init.Mode) == OPAMP_STANDALONE_MODE)
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{
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assert_param(IS_OPAMP_INVERTING_INPUT_STANDALONE(hopamp->Init.InvertingInput));
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}
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if ((hopamp->Init.Mode) == OPAMP_PGA_MODE)
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{
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assert_param(IS_OPAMP_INVERTING_INPUT_PGA(hopamp->Init.InvertingInput));
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}
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if ((hopamp->Init.Mode) == OPAMP_PGA_MODE)
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{
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assert_param(IS_OPAMP_PGA_GAIN(hopamp->Init.PgaGain));
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}
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assert_param(IS_OPAMP_TRIMMING(hopamp->Init.UserTrimming));
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if ((hopamp->Init.UserTrimming) == OPAMP_TRIMMING_USER)
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{
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if (hopamp->Init.PowerMode == OPAMP_POWERMODE_NORMALPOWER)
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{
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assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueP));
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assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueN));
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}
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else
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{
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assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValuePLowPower));
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assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueNLowPower));
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}
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}
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if(hopamp->State == HAL_OPAMP_STATE_RESET)
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{
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/* Allocate lock resource and initialize it */
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hopamp->Lock = HAL_UNLOCKED;
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}
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#if (USE_HAL_OPAMP_REGISTER_CALLBACKS == 1)
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hopamp->MspInitCallback(hopamp);
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#else
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/* Call MSP init function */
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HAL_OPAMP_MspInit(hopamp);
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#endif /* USE_HAL_OPAMP_REGISTER_CALLBACKS */
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/* Set operating mode */
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CLEAR_BIT(hopamp->Instance->CSR, OPAMP_CSR_CALON);
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if (hopamp->Init.Mode == OPAMP_PGA_MODE)
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{
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MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_INIT_MASK_PGA, \
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hopamp->Init.PowerMode | \
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hopamp->Init.Mode | \
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hopamp->Init.PgaGain | \
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hopamp->Init.InvertingInput | \
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hopamp->Init.NonInvertingInput | \
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hopamp->Init.UserTrimming);
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}
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if (hopamp->Init.Mode == OPAMP_FOLLOWER_MODE)
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{
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/* In Follower mode InvertingInput is Not Applicable */
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MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_INIT_MASK_FOLLOWER, \
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hopamp->Init.PowerMode | \
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hopamp->Init.Mode | \
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hopamp->Init.NonInvertingInput | \
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hopamp->Init.UserTrimming);
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}
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if (hopamp->Init.Mode == OPAMP_STANDALONE_MODE)
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{
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MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_INIT_MASK_STANDALONE, \
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hopamp->Init.PowerMode | \
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hopamp->Init.Mode | \
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hopamp->Init.InvertingInput | \
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hopamp->Init.NonInvertingInput | \
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hopamp->Init.UserTrimming);
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}
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if (hopamp->Init.UserTrimming == OPAMP_TRIMMING_USER)
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{
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/* Set power mode and associated calibration parameters */
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if (hopamp->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
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{
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/* OPAMP_POWERMODE_NORMALPOWER */
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/* Set calibration mode (factory or user) and values for */
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/* transistors differential pair high (PMOS) and low (NMOS) for */
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/* normal mode. */
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updateotrlpotr = (((hopamp->Init.TrimmingValueP) << (OPAMP_INPUT_NONINVERTING)) \
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| (hopamp->Init.TrimmingValueN));
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MODIFY_REG(hopamp->Instance->OTR, OPAMP_OTR_TRIMOFFSETN | OPAMP_OTR_TRIMOFFSETP, updateotrlpotr);
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}
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else
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{
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/* OPAMP_POWERMODE_LOWPOWER */
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/* transistors differential pair high (PMOS) and low (NMOS) for */
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/* low power mode. */
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updateotrlpotr = (((hopamp->Init.TrimmingValuePLowPower) << (OPAMP_INPUT_NONINVERTING)) \
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| (hopamp->Init.TrimmingValueNLowPower));
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MODIFY_REG(hopamp->Instance->LPOTR, OPAMP_OTR_TRIMOFFSETN | OPAMP_OTR_TRIMOFFSETP, updateotrlpotr);
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}
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}
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/* Configure the power supply range */
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/* The OPAMP_CSR_OPARANGE is common configuration for all OPAMPs */
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/* bit OPAMP1_CSR_OPARANGE is used for both OPAMPs */
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MODIFY_REG(OPAMP1->CSR, OPAMP1_CSR_OPARANGE, hopamp->Init.PowerSupplyRange);
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/* Update the OPAMP state*/
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if (hopamp->State == HAL_OPAMP_STATE_RESET)
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{
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/* From RESET state to READY State */
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hopamp->State = HAL_OPAMP_STATE_READY;
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}
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/* else: remain in READY or BUSY state (no update) */
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return status;
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}
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}
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/**
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* @brief DeInitialize the OPAMP peripheral.
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* @note Deinitialization can be performed if the OPAMP configuration is locked.
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* (the lock is SW in L4)
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* @param hopamp OPAMP handle
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_OPAMP_DeInit(OPAMP_HandleTypeDef *hopamp)
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{
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HAL_StatusTypeDef status = HAL_OK;
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/* Check the OPAMP handle allocation */
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/* DeInit not allowed if calibration is ongoing */
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if(hopamp == NULL)
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{
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status = HAL_ERROR;
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}
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else if(hopamp->State == HAL_OPAMP_STATE_CALIBBUSY)
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{
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status = HAL_ERROR;
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}
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else
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{
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/* Check the parameter */
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assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
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/* Set OPAMP_CSR register to reset value */
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/* Mind that OPAMP1_CSR_OPARANGE of CSR of OPAMP1 remains unchanged (applies to both OPAMPs) */
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/* OPAMP shall be disabled first separately */
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CLEAR_BIT(hopamp->Instance->CSR, OPAMP_CSR_OPAMPxEN);
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MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_RESET_BITS, OPAMP_CSR_RESET_VALUE);
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#if (USE_HAL_OPAMP_REGISTER_CALLBACKS == 1)
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if(hopamp->MspDeInitCallback == NULL)
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{
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hopamp->MspDeInitCallback = HAL_OPAMP_MspDeInit;
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}
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/* DeInit the low level hardware */
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hopamp->MspDeInitCallback(hopamp);
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#else
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/* DeInit the low level hardware: GPIO, CLOCK and NVIC */
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HAL_OPAMP_MspDeInit(hopamp);
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#endif /* USE_HAL_OPAMP_REGISTER_CALLBACKS */
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/* Update the OPAMP state*/
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hopamp->State = HAL_OPAMP_STATE_RESET;
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|
|
|
/* 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 */
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|