439 lines
15 KiB
C
439 lines
15 KiB
C
/**
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******************************************************************************
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* @file stm32l4xx_hal_opamp_ex.c
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* @author MCD Application Team
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* @brief Extended 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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* + Extended Initialization and de-initialization functions
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* + Extended Peripheral Control functions
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*
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@verbatim
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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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*/
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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 OPAMPEx OPAMPEx
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* @brief OPAMP Extended HAL module driver
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* @{
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*/
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#ifdef HAL_OPAMP_MODULE_ENABLED
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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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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#if defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || \
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defined (STM32L496xx) || defined (STM32L4A6xx) || \
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defined (STM32L4P5xx) || defined (STM32L4Q5xx) || \
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defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined (STM32L4S9xx)
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/** @addtogroup OPAMPEx_Exported_Functions_Group1
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* @brief Extended operation functions
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*
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@verbatim
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===============================================================================
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##### Extended IO operation functions #####
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===============================================================================
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[..]
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(+) OPAMP Self calibration.
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@endverbatim
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* @{
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*/
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/* 2 OPAMPS available */
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/* 2 OPAMPS can be calibrated in parallel */
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/* Not available on STM32L41x/STM32L42x/STM32L43x/STM32L44x where only one OPAMP available */
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/**
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* @brief Run the self calibration of the 2 OPAMPs in parallel.
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* @note Trimming values (PMOS & NMOS) are updated and user trimming is
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* enabled is calibration is successful.
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* @note Calibration is performed in the mode specified in OPAMP init
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* structure (mode normal or low-power). To perform calibration for
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* both modes, repeat this function twice after OPAMP init structure
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* accordingly updated.
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* @note Calibration runs about 10 ms (5 dichotomy steps, repeated for P
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* and N transistors: 10 steps with 1 ms for each step).
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* @param hopamp1 handle
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* @param hopamp2 handle
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_OPAMPEx_SelfCalibrateAll(OPAMP_HandleTypeDef *hopamp1, OPAMP_HandleTypeDef *hopamp2)
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{
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HAL_StatusTypeDef status = HAL_OK;
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uint32_t trimmingvaluen1;
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uint32_t trimmingvaluep1;
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uint32_t trimmingvaluen2;
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uint32_t trimmingvaluep2;
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/* Selection of register of trimming depending on power mode: OTR or LPOTR */
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__IO uint32_t* tmp_opamp1_reg_trimming;
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__IO uint32_t* tmp_opamp2_reg_trimming;
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uint32_t delta;
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uint32_t opampmode1;
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uint32_t opampmode2;
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if((hopamp1 == NULL) || (hopamp2 == NULL))
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{
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status = HAL_ERROR;
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}
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/* Check if OPAMP in calibration mode and calibration not yet enable */
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else if(hopamp1->State != HAL_OPAMP_STATE_READY)
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{
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status = HAL_ERROR;
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}
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else if(hopamp2->State != HAL_OPAMP_STATE_READY)
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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(hopamp1->Instance));
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assert_param(IS_OPAMP_ALL_INSTANCE(hopamp2->Instance));
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assert_param(IS_OPAMP_POWERMODE(hopamp1->Init.PowerMode));
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assert_param(IS_OPAMP_POWERMODE(hopamp2->Init.PowerMode));
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/* Save OPAMP mode as in */
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/* STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx */
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/* the calibration is not working in PGA mode */
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opampmode1 = READ_BIT(hopamp1->Instance->CSR,OPAMP_CSR_OPAMODE);
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opampmode2 = READ_BIT(hopamp2->Instance->CSR,OPAMP_CSR_OPAMODE);
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/* Use of standalone mode */
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MODIFY_REG(hopamp1->Instance->CSR, OPAMP_CSR_OPAMODE, OPAMP_STANDALONE_MODE);
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MODIFY_REG(hopamp2->Instance->CSR, OPAMP_CSR_OPAMODE, OPAMP_STANDALONE_MODE);
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/* user trimming values are used for offset calibration */
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SET_BIT(hopamp1->Instance->CSR, OPAMP_CSR_USERTRIM);
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SET_BIT(hopamp2->Instance->CSR, OPAMP_CSR_USERTRIM);
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/* Select trimming settings depending on power mode */
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if (hopamp1->Init.PowerMode == OPAMP_POWERMODE_NORMALPOWER)
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{
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tmp_opamp1_reg_trimming = &OPAMP1->OTR;
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}
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else
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{
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tmp_opamp1_reg_trimming = &OPAMP1->LPOTR;
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}
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if (hopamp2->Init.PowerMode == OPAMP_POWERMODE_NORMALPOWER)
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{
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tmp_opamp2_reg_trimming = &OPAMP2->OTR;
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}
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else
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{
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tmp_opamp2_reg_trimming = &OPAMP2->LPOTR;
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}
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/* Enable calibration */
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SET_BIT (hopamp1->Instance->CSR, OPAMP_CSR_CALON);
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SET_BIT (hopamp2->Instance->CSR, OPAMP_CSR_CALON);
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/* 1st calibration - N */
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CLEAR_BIT (hopamp1->Instance->CSR, OPAMP_CSR_CALSEL);
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CLEAR_BIT (hopamp2->Instance->CSR, OPAMP_CSR_CALSEL);
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/* Enable the selected opamp */
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SET_BIT (hopamp1->Instance->CSR, OPAMP_CSR_OPAMPxEN);
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SET_BIT (hopamp2->Instance->CSR, OPAMP_CSR_OPAMPxEN);
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/* Init trimming counter */
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/* Medium value */
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trimmingvaluen1 = 16U;
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trimmingvaluen2 = 16U;
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delta = 8U;
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while (delta != 0U)
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{
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/* Set candidate trimming */
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/* OPAMP_POWERMODE_NORMALPOWER */
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MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen1);
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MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen2);
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/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
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/* Offset trim time: during calibration, minimum time needed between */
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/* two steps to have 1 mV accuracy */
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HAL_Delay(OPAMP_TRIMMING_DELAY);
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if (READ_BIT(hopamp1->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
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{
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/* OPAMP_CSR_CALOUT is HIGH try lower trimming */
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trimmingvaluen1 -= delta;
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}
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else
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{
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/* OPAMP_CSR_CALOUT is LOW try higher trimming */
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trimmingvaluen1 += delta;
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}
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if (READ_BIT(hopamp2->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
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{
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/* OPAMP_CSR_CALOUT is HIGH try lower trimming */
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trimmingvaluen2 -= delta;
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}
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else
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{
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/* OPAMP_CSR_CALOUT is LOW try higher trimming */
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trimmingvaluen2 += delta;
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}
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/* Divide range by 2 to continue dichotomy sweep */
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delta >>= 1U;
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}
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/* Still need to check if right calibration is current value or one step below */
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/* Indeed the first value that causes the OUTCAL bit to change from 0 to 1 */
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/* Set candidate trimming */
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MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen1);
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MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen2);
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/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
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/* Offset trim time: during calibration, minimum time needed between */
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/* two steps to have 1 mV accuracy */
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HAL_Delay(OPAMP_TRIMMING_DELAY);
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if ((READ_BIT(hopamp1->Instance->CSR, OPAMP_CSR_CALOUT)) == 0U)
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{
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/* Trimming value is actually one value more */
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trimmingvaluen1++;
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MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen1);
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}
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if ((READ_BIT(hopamp2->Instance->CSR, OPAMP_CSR_CALOUT)) == 0U)
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{
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/* Trimming value is actually one value more */
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trimmingvaluen2++;
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MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OTR_TRIMOFFSETN, trimmingvaluen2);
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}
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/* 2nd calibration - P */
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SET_BIT (hopamp1->Instance->CSR, OPAMP_CSR_CALSEL);
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SET_BIT (hopamp2->Instance->CSR, OPAMP_CSR_CALSEL);
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/* Init trimming counter */
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/* Medium value */
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trimmingvaluep1 = 16U;
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trimmingvaluep2 = 16U;
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delta = 8U;
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while (delta != 0U)
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{
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/* Set candidate trimming */
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/* OPAMP_POWERMODE_NORMALPOWER */
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MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep1<<OPAMP_INPUT_NONINVERTING));
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MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep2<<OPAMP_INPUT_NONINVERTING));
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/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
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/* Offset trim time: during calibration, minimum time needed between */
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/* two steps to have 1 mV accuracy */
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HAL_Delay(OPAMP_TRIMMING_DELAY);
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if (READ_BIT(hopamp1->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
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{
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/* OPAMP_CSR_CALOUT is HIGH try higher trimming */
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trimmingvaluep1 += delta;
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}
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else
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{
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/* OPAMP_CSR_CALOUT is HIGH try lower trimming */
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trimmingvaluep1 -= delta;
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}
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if (READ_BIT(hopamp2->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
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{
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/* OPAMP_CSR_CALOUT is HIGH try higher trimming */
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trimmingvaluep2 += delta;
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}
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else
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{
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/* OPAMP_CSR_CALOUT is LOW try lower trimming */
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trimmingvaluep2 -= delta;
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}
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/* Divide range by 2 to continue dichotomy sweep */
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delta >>= 1U;
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}
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/* Still need to check if right calibration is current value or one step below */
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/* Indeed the first value that causes the OUTCAL bit to change from 1 to 0 */
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/* Set candidate trimming */
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MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep1<<OPAMP_INPUT_NONINVERTING));
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MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep2<<OPAMP_INPUT_NONINVERTING));
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/* OFFTRIMmax delay 1 ms as per datasheet (electrical characteristics */
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/* Offset trim time: during calibration, minimum time needed between */
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/* two steps to have 1 mV accuracy */
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HAL_Delay(OPAMP_TRIMMING_DELAY);
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if (READ_BIT(hopamp1->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
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{
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/* Trimming value is actually one value more */
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trimmingvaluep1++;
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MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep1<<OPAMP_INPUT_NONINVERTING));
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}
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if (READ_BIT(hopamp2->Instance->CSR, OPAMP_CSR_CALOUT) != 0U)
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{
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/* Trimming value is actually one value more */
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trimmingvaluep2++;
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MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OTR_TRIMOFFSETP, (trimmingvaluep2<<OPAMP_INPUT_NONINVERTING));
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}
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/* Disable the OPAMPs */
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CLEAR_BIT (hopamp1->Instance->CSR, OPAMP_CSR_OPAMPxEN);
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CLEAR_BIT (hopamp2->Instance->CSR, OPAMP_CSR_OPAMPxEN);
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/* Disable calibration & set normal mode (operating mode) */
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CLEAR_BIT (hopamp1->Instance->CSR, OPAMP_CSR_CALON);
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CLEAR_BIT (hopamp2->Instance->CSR, OPAMP_CSR_CALON);
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/* Self calibration is successful */
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/* Store calibration (user trimming) results in init structure. */
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/* Set user trimming mode */
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hopamp1->Init.UserTrimming = OPAMP_TRIMMING_USER;
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hopamp2->Init.UserTrimming = OPAMP_TRIMMING_USER;
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/* Affect calibration parameters depending on mode normal/low power */
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if (hopamp1->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
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{
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/* Write calibration result N */
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hopamp1->Init.TrimmingValueN = trimmingvaluen1;
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/* Write calibration result P */
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hopamp1->Init.TrimmingValueP = trimmingvaluep1;
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}
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else
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{
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/* Write calibration result N */
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hopamp1->Init.TrimmingValueNLowPower = trimmingvaluen1;
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/* Write calibration result P */
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hopamp1->Init.TrimmingValuePLowPower = trimmingvaluep1;
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}
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if (hopamp2->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
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{
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/* Write calibration result N */
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hopamp2->Init.TrimmingValueN = trimmingvaluen2;
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/* Write calibration result P */
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hopamp2->Init.TrimmingValueP = trimmingvaluep2;
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}
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else
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{
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/* Write calibration result N */
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hopamp2->Init.TrimmingValueNLowPower = trimmingvaluen2;
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/* Write calibration result P */
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hopamp2->Init.TrimmingValuePLowPower = trimmingvaluep2;
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}
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/* Update OPAMP state */
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hopamp1->State = HAL_OPAMP_STATE_READY;
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hopamp2->State = HAL_OPAMP_STATE_READY;
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/* Restore OPAMP mode after calibration */
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MODIFY_REG(hopamp1->Instance->CSR, OPAMP_CSR_OPAMODE, opampmode1);
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MODIFY_REG(hopamp2->Instance->CSR, OPAMP_CSR_OPAMODE, opampmode2);
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}
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return status;
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}
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/**
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* @}
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*/
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#endif
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/** @defgroup OPAMPEx_Exported_Functions_Group2 Peripheral Control functions
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* @brief Peripheral Control functions
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*
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@verbatim
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===============================================================================
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##### Peripheral Control functions #####
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===============================================================================
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[..]
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(+) OPAMP unlock.
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@endverbatim
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* @{
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*/
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/**
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* @brief Unlock the selected OPAMP configuration.
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* @note This function must be called only when OPAMP is in state "locked".
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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_OPAMPEx_Unlock(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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/* Check if OPAMP locked */
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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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/* Check the OPAMP handle allocation */
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/* Check if OPAMP locked */
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else if(hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED)
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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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/* OPAMP state changed to locked */
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hopamp->State = HAL_OPAMP_STATE_BUSY;
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}
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else
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{
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status = HAL_ERROR;
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}
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return status;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* HAL_OPAMP_MODULE_ENABLED */
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/**
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* @}
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*/
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/**
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* @}
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*/
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