/**
******************************************************************************
* @file stm32l1xx_hal_opamp_ex.c
* @author MCD Application Team
* @brief Extended OPAMP HAL module driver.
*
* This file provides firmware functions to manage the following
* functionalities of the operational amplifier(s)(OPAMP1, OPAMP2 etc)
* peripheral:
* + Extended Initialization and de-initialization functions
* + Extended Peripheral Control functions
*
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2017 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l1xx_hal.h"
#ifdef HAL_OPAMP_MODULE_ENABLED
#if defined (STM32L151xCA) || defined (STM32L151xD) || defined (STM32L152xCA) || defined (STM32L152xD) || defined (STM32L162xCA) || defined (STM32L162xD) || defined (STM32L151xE) || defined (STM32L151xDX) || defined (STM32L152xE) || defined (STM32L152xDX) || defined (STM32L162xE) || defined (STM32L162xDX) || defined (STM32L162xC) || defined (STM32L152xC) || defined (STM32L151xC)
/** @addtogroup STM32L1xx_HAL_Driver
* @{
*/
/** @defgroup OPAMPEx OPAMPEx
* @brief OPAMP Extended HAL module driver.
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup OPAMPEx_Exported_Functions OPAMPEx Exported Functions
* @{
*/
/** @addtogroup OPAMPEx_Exported_Functions_Group1
* @brief Extended operation functions
*
@verbatim
===============================================================================
##### Extended IO operation functions #####
===============================================================================
[..]
(+) OPAMP Self calibration.
@endverbatim
* @{
*/
#if defined (STM32L151xD) || defined (STM32L152xD) || defined (STM32L162xD)
/* 3 OPAMPS available */
/* 3 OPAMPS can be calibrated in parallel */
/**
* @brief Run the self calibration of the 3 OPAMPs in parallel.
* @note Trimming values (PMOS & NMOS) are updated and user trimming is
* enabled is calibration is succesful.
* @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 (5 dichotmy steps, repeated for P
* and N transistors: 10 steps with 1 ms for each step).
* @param hopamp1 handle
* @param hopamp2 handle
* @param hopamp3 handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMPEx_SelfCalibrateAll(OPAMP_HandleTypeDef *hopamp1, OPAMP_HandleTypeDef *hopamp2, OPAMP_HandleTypeDef *hopamp3)
{
HAL_StatusTypeDef status = HAL_OK;
uint32_t* opamp1_trimmingvalue;
uint32_t opamp1_trimmingvaluen = 0;
uint32_t opamp1_trimmingvaluep = 0;
uint32_t* opamp2_trimmingvalue;
uint32_t opamp2_trimmingvaluen = 0;
uint32_t opamp2_trimmingvaluep = 0;
uint32_t* opamp3_trimmingvalue;
uint32_t opamp3_trimmingvaluen = 0;
uint32_t opamp3_trimmingvaluep = 0;
uint32_t trimming_diff_pair; /* Selection of differential transistors pair high or low */
__IO uint32_t* tmp_opamp1_reg_trimming; /* Selection of register of trimming depending on power mode: OTR or LPOTR */
__IO uint32_t* tmp_opamp2_reg_trimming;
__IO uint32_t* tmp_opamp3_reg_trimming;
uint32_t tmp_opamp1_otr_otuser; /* Selection of bit OPAMP_OTR_OT_USER depending on trimming register pointed: OTR or LPOTR */
uint32_t tmp_opamp2_otr_otuser;
uint32_t tmp_opamp3_otr_otuser;
uint32_t tmp_Opa1calout_DefaultSate; /* Bit OPAMP_CSR_OPA1CALOUT default state when trimming value is 00000b. Used to detect the bit toggling */
uint32_t tmp_Opa2calout_DefaultSate; /* Bit OPAMP_CSR_OPA2CALOUT default state when trimming value is 00000b. Used to detect the bit toggling */
uint32_t tmp_Opa3calout_DefaultSate; /* Bit OPAMP_CSR_OPA3CALOUT default state when trimming value is 00000b. Used to detect the bit toggling */
uint32_t tmp_OpaxSwitchesContextBackup = 0x0U;
uint8_t trimming_diff_pair_iteration_count = 0x0U; /* For calibration loop algorithm: to repeat the calibration loop for both differential transistors pair high and low */
uint8_t delta; /* For calibration loop algorithm: Variable for dichotomy steps value */
uint8_t final_step_check = 0x0U; /* For calibration loop algorithm: Flag for additional check of last trimming step */
if((hopamp1 == NULL) || (hopamp2 == NULL) || (hopamp3 == NULL))
{
status = HAL_ERROR;
}
/* Check if OPAMP in calibration mode and calibration not yet enable */
else if(hopamp1->State != HAL_OPAMP_STATE_READY)
{
status = HAL_ERROR;
}
else if(hopamp2->State != HAL_OPAMP_STATE_READY)
{
status = HAL_ERROR;
}
else if(hopamp3->State != HAL_OPAMP_STATE_READY)
{
status = HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp1->Instance));
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp2->Instance));
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp3->Instance));
assert_param(IS_OPAMP_POWERMODE(hopamp1->Init.PowerMode));
assert_param(IS_OPAMP_POWERMODE(hopamp2->Init.PowerMode));
assert_param(IS_OPAMP_POWERMODE(hopamp3->Init.PowerMode));
/* Update OPAMP state */
hopamp1->State = HAL_OPAMP_STATE_CALIBBUSY;
hopamp2->State = HAL_OPAMP_STATE_CALIBBUSY;
hopamp3->State = HAL_OPAMP_STATE_CALIBBUSY;
/* Backup of switches configuration to restore it at the end of the */
/* calibration. */
tmp_OpaxSwitchesContextBackup = READ_BIT(OPAMP->CSR, OPAMP_CSR_ALL_SWITCHES_ALL_OPAMPS);
/* Open all switches on non-inverting input, inverting input and output */
/* feedback. */
CLEAR_BIT(OPAMP->CSR, OPAMP_CSR_ALL_SWITCHES_ALL_OPAMPS);
/* Set calibration mode to user programmed trimming values */
SET_BIT(OPAMP->OTR, OPAMP_OTR_OT_USER);
/* Select trimming settings depending on power mode */
if (hopamp1->Init.PowerMode == OPAMP_POWERMODE_NORMAL)
{
tmp_opamp1_otr_otuser = OPAMP_OTR_OT_USER;
tmp_opamp1_reg_trimming = &OPAMP->OTR;
}
else
{
tmp_opamp1_otr_otuser = 0x00000000;
tmp_opamp1_reg_trimming = &OPAMP->LPOTR;
}
if (hopamp2->Init.PowerMode == OPAMP_POWERMODE_NORMAL)
{
tmp_opamp2_otr_otuser = OPAMP_OTR_OT_USER;
tmp_opamp2_reg_trimming = &OPAMP->OTR;
}
else
{
tmp_opamp2_otr_otuser = 0x00000000;
tmp_opamp2_reg_trimming = &OPAMP->LPOTR;
}
if (hopamp3->Init.PowerMode == OPAMP_POWERMODE_NORMAL)
{
tmp_opamp3_otr_otuser = OPAMP_OTR_OT_USER;
tmp_opamp3_reg_trimming = &OPAMP->OTR;
}
else
{
tmp_opamp3_otr_otuser = 0x00000000;
tmp_opamp3_reg_trimming = &OPAMP->LPOTR;
}
/* Enable the selected opamp */
CLEAR_BIT (OPAMP->CSR, OPAMP_CSR_OPAXPD_ALL);
/* Perform trimming for both differential transistors pair high and low */
for (trimming_diff_pair_iteration_count = 0U; trimming_diff_pair_iteration_count <= 1U; trimming_diff_pair_iteration_count++)
{
if (trimming_diff_pair_iteration_count == 0U)
{
/* Calibration of transistors differential pair high (NMOS) */
trimming_diff_pair = OPAMP_FACTORYTRIMMING_N;
opamp1_trimmingvalue = &opamp1_trimmingvaluen;
opamp2_trimmingvalue = &opamp2_trimmingvaluen;
opamp3_trimmingvalue = &opamp3_trimmingvaluen;
/* Set bit OPAMP_CSR_OPAXCALOUT default state when trimming value */
/* is 00000b. Used to detect the bit toggling during trimming. */
tmp_Opa1calout_DefaultSate = RESET;
tmp_Opa2calout_DefaultSate = RESET;
tmp_Opa3calout_DefaultSate = RESET;
/* Enable calibration for N differential pair */
MODIFY_REG(OPAMP->CSR, OPAMP_CSR_OPAXCAL_L_ALL,
OPAMP_CSR_OPAXCAL_H_ALL);
}
else /* (trimming_diff_pair_iteration_count == 1) */
{
/* Calibration of transistors differential pair low (PMOS) */
trimming_diff_pair = OPAMP_FACTORYTRIMMING_P;
opamp1_trimmingvalue = &opamp1_trimmingvaluep;
opamp2_trimmingvalue = &opamp2_trimmingvaluep;
opamp3_trimmingvalue = &opamp3_trimmingvaluep;
/* Set bit OPAMP_CSR_OPAXCALOUT default state when trimming value */
/* is 00000b. Used to detect the bit toggling during trimming. */
tmp_Opa1calout_DefaultSate = OPAMP_CSR_OPAXCALOUT(hopamp1);
tmp_Opa2calout_DefaultSate = OPAMP_CSR_OPAXCALOUT(hopamp2);
tmp_Opa3calout_DefaultSate = OPAMP_CSR_OPAXCALOUT(hopamp3);
/* Enable calibration for P differential pair */
MODIFY_REG(OPAMP->CSR, OPAMP_CSR_OPAXCAL_H_ALL,
OPAMP_CSR_OPAXCAL_L_ALL);
}
/* Perform calibration parameter search by dichotomy sweep */
/* - Delta initial value 16: for 5 dichotomy steps: 16 for the */
/* initial range, then successive delta sweeps (8, 4, 2, 1). */
/* can extend the search range to +/- 15 units. */
/* - Trimming initial value 15: search range will go from 0 to 30 */
/* (Trimming value 31 is forbidden). */
/* Note: After dichotomy sweep, the trimming result is determined. */
/* However, the final trimming step is deduced from previous */
/* trimming steps tested but is not effectively tested. */
/* An additional test step (using variable "final_step_check") */
/* allow to Test the final trimming step. */
*opamp1_trimmingvalue = 15U;
*opamp2_trimmingvalue = 15U;
*opamp3_trimmingvalue = 15U;
delta = 16U;
while ((delta != 0U) || (final_step_check == 1U))
{
/* Set candidate trimming */
MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, *opamp1_trimmingvalue) | tmp_opamp1_otr_otuser);
MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, *opamp2_trimmingvalue) | tmp_opamp2_otr_otuser);
MODIFY_REG(*tmp_opamp3_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp3, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp3, trimming_diff_pair, *opamp3_trimmingvalue) | tmp_opamp3_otr_otuser);
/* Offset trimming time: during calibration, minimum time needed */
/* between two steps to have 1 mV accuracy. */
HAL_Delay(OPAMP_TRIMMING_DELAY);
/* Set flag for additional check of last trimming step equal to */
/* dichotomy step before its division by 2 (equivalent to previous */
/* value of dichotomy step). */
final_step_check = delta;
/* Divide range by 2 to continue dichotomy sweep */
delta >>= 1U;
/* Set trimming values for next iteration in function of trimming */
/* result toggle (versus initial state). */
/* Trimming values update with dichotomy delta of previous */
/* iteration. */
/* Note: on the last trimming loop, delta is equal to 0 and */
/* therefore has no effect. */
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp1)) != tmp_Opa1calout_DefaultSate)
{
/* If calibration output is has toggled, try lower trimming */
*opamp1_trimmingvalue -= delta;
}
else
{
/* If calibration output is has not toggled, try higher trimming */
*opamp1_trimmingvalue += delta;
}
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp2)) != tmp_Opa2calout_DefaultSate)
{
/* If calibration output is has toggled, try lower trimming */
*opamp2_trimmingvalue -= delta;
}
else
{
/* If calibration output is has not toggled, try higher trimming */
*opamp2_trimmingvalue += delta;
}
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp3)) != tmp_Opa3calout_DefaultSate)
{
/* If calibration output is has toggled, try lower trimming */
*opamp3_trimmingvalue -= delta;
}
else
{
/* If calibration output is has not toggled, try higher trimming */
*opamp3_trimmingvalue += delta;
}
}
/* Check trimming result of the selected step and perform final fine */
/* trimming. */
/* - If calibration output is has toggled: the current step is */
/* already optimized. */
/* - If calibration output is has not toggled: the current step can */
/* be optimized by incrementing it of one step. */
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp1)) == tmp_Opa1calout_DefaultSate)
{
*opamp1_trimmingvalue += 1U;
/* Set final fine trimming */
MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, *opamp1_trimmingvalue) | tmp_opamp1_otr_otuser);
}
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp2)) == tmp_Opa2calout_DefaultSate)
{
*opamp2_trimmingvalue += 1U;
/* Set final fine trimming */
MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, *opamp2_trimmingvalue) | tmp_opamp2_otr_otuser);
}
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp3)) == tmp_Opa3calout_DefaultSate)
{
*opamp3_trimmingvalue += 1U;
/* Set final fine trimming */
MODIFY_REG(*tmp_opamp3_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp3, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp3, trimming_diff_pair, *opamp3_trimmingvalue) | tmp_opamp3_otr_otuser);
}
}
/* Disable calibration for P and N differential pairs */
/* Disable the selected opamp */
CLEAR_BIT (OPAMP->CSR, (OPAMP_CSR_OPAXCAL_H_ALL |
OPAMP_CSR_OPAXCAL_L_ALL |
OPAMP_CSR_OPAXPD_ALL ));
/* Backup of switches configuration to restore it at the end of the */
/* calibration. */
SET_BIT(OPAMP->CSR, tmp_OpaxSwitchesContextBackup);
/* Self calibration is successful */
/* Store calibration (user trimming) results in init structure. */
/* Set user trimming mode */
hopamp1->Init.UserTrimming = OPAMP_TRIMMING_USER;
hopamp2->Init.UserTrimming = OPAMP_TRIMMING_USER;
hopamp3->Init.UserTrimming = OPAMP_TRIMMING_USER;
/* Affect calibration parameters depending on mode normal/low power */
if (hopamp1->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
{
/* Write calibration result N */
hopamp1->Init.TrimmingValueN = opamp1_trimmingvaluen;
/* Write calibration result P */
hopamp1->Init.TrimmingValueP = opamp1_trimmingvaluep;
}
else
{
/* Write calibration result N */
hopamp1->Init.TrimmingValueNLowPower = opamp1_trimmingvaluen;
/* Write calibration result P */
hopamp1->Init.TrimmingValuePLowPower = opamp1_trimmingvaluep;
}
if (hopamp2->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
{
/* Write calibration result N */
hopamp2->Init.TrimmingValueN = opamp2_trimmingvaluen;
/* Write calibration result P */
hopamp2->Init.TrimmingValueP = opamp2_trimmingvaluep;
}
else
{
/* Write calibration result N */
hopamp2->Init.TrimmingValueNLowPower = opamp2_trimmingvaluen;
/* Write calibration result P */
hopamp2->Init.TrimmingValuePLowPower = opamp2_trimmingvaluep;
}
if (hopamp3->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
{
/* Write calibration result N */
hopamp3->Init.TrimmingValueN = opamp3_trimmingvaluen;
/* Write calibration result P */
hopamp3->Init.TrimmingValueP = opamp3_trimmingvaluep;
}
else
{
/* Write calibration result N */
hopamp3->Init.TrimmingValueNLowPower = opamp3_trimmingvaluen;
/* Write calibration result P */
hopamp3->Init.TrimmingValuePLowPower = opamp3_trimmingvaluep;
}
/* Update OPAMP state */
hopamp1->State = HAL_OPAMP_STATE_READY;
hopamp2->State = HAL_OPAMP_STATE_READY;
hopamp3->State = HAL_OPAMP_STATE_READY;
}
return status;
}
#else
/* 2 OPAMPS available */
/* 2 OPAMPS can be calibrated in parallel */
/**
* @brief Run the self calibration of the 2 OPAMPs in parallel.
* @note Trimming values (PMOS & NMOS) are updated and user trimming is
* enabled is calibration is succesful.
* @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 (5 dichotmy steps, repeated for P
* and N transistors: 10 steps with 1 ms for each step).
* @param hopamp1 handle
* @param hopamp2 handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMPEx_SelfCalibrateAll(OPAMP_HandleTypeDef *hopamp1, OPAMP_HandleTypeDef *hopamp2)
{
HAL_StatusTypeDef status = HAL_OK;
uint32_t* opamp1_trimmingvalue;
uint32_t opamp1_trimmingvaluen = 0;
uint32_t opamp1_trimmingvaluep = 0;
uint32_t* opamp2_trimmingvalue;
uint32_t opamp2_trimmingvaluen = 0;
uint32_t opamp2_trimmingvaluep = 0;
uint32_t trimming_diff_pair; /* Selection of differential transistors pair high or low */
__IO uint32_t* tmp_opamp1_reg_trimming; /* Selection of register of trimming depending on power mode: OTR or LPOTR */
__IO uint32_t* tmp_opamp2_reg_trimming;
uint32_t tmp_opamp1_otr_otuser; /* Selection of bit OPAMP_OTR_OT_USER depending on trimming register pointed: OTR or LPOTR */
uint32_t tmp_opamp2_otr_otuser;
uint32_t tmp_Opa1calout_DefaultSate; /* Bit OPAMP_CSR_OPA1CALOUT default state when trimming value is 00000b. Used to detect the bit toggling */
uint32_t tmp_Opa2calout_DefaultSate; /* Bit OPAMP_CSR_OPA2CALOUT default state when trimming value is 00000b. Used to detect the bit toggling */
uint32_t tmp_OpaxSwitchesContextBackup;
uint8_t trimming_diff_pair_iteration_count; /* For calibration loop algorithm: to repeat the calibration loop for both differential transistors pair high and low */
uint8_t delta; /* For calibration loop algorithm: Variable for dichotomy steps value */
uint8_t final_step_check = 0x0U; /* For calibration loop algorithm: Flag for additional check of last trimming step */
if((hopamp1 == NULL) || (hopamp2 == NULL))
{
status = HAL_ERROR;
}
/* Check if OPAMP in calibration mode and calibration not yet enable */
else if(hopamp1->State != HAL_OPAMP_STATE_READY)
{
status = HAL_ERROR;
}
else if(hopamp2->State != HAL_OPAMP_STATE_READY)
{
status = HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp1->Instance));
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp2->Instance));
assert_param(IS_OPAMP_POWERMODE(hopamp1->Init.PowerMode));
assert_param(IS_OPAMP_POWERMODE(hopamp2->Init.PowerMode));
/* Update OPAMP state */
hopamp1->State = HAL_OPAMP_STATE_CALIBBUSY;
hopamp2->State = HAL_OPAMP_STATE_CALIBBUSY;
/* Backup of switches configuration to restore it at the end of the */
/* calibration. */
tmp_OpaxSwitchesContextBackup = READ_BIT(OPAMP->CSR, OPAMP_CSR_ALL_SWITCHES_ALL_OPAMPS);
/* Open all switches on non-inverting input, inverting input and output */
/* feedback. */
CLEAR_BIT(OPAMP->CSR, OPAMP_CSR_ALL_SWITCHES_ALL_OPAMPS);
/* Set calibration mode to user programmed trimming values */
SET_BIT(OPAMP->OTR, OPAMP_OTR_OT_USER);
/* Select trimming settings depending on power mode */
if (hopamp1->Init.PowerMode == OPAMP_POWERMODE_NORMAL)
{
tmp_opamp1_otr_otuser = OPAMP_OTR_OT_USER;
tmp_opamp1_reg_trimming = &OPAMP->OTR;
}
else
{
tmp_opamp1_otr_otuser = 0x00000000U;
tmp_opamp1_reg_trimming = &OPAMP->LPOTR;
}
if (hopamp2->Init.PowerMode == OPAMP_POWERMODE_NORMAL)
{
tmp_opamp2_otr_otuser = OPAMP_OTR_OT_USER;
tmp_opamp2_reg_trimming = &OPAMP->OTR;
}
else
{
tmp_opamp2_otr_otuser = 0x00000000U;
tmp_opamp2_reg_trimming = &OPAMP->LPOTR;
}
/* Enable the selected opamp */
CLEAR_BIT (OPAMP->CSR, OPAMP_CSR_OPAXPD_ALL);
/* Perform trimming for both differential transistors pair high and low */
for (trimming_diff_pair_iteration_count = 0U; trimming_diff_pair_iteration_count <= 1U; trimming_diff_pair_iteration_count++)
{
if (trimming_diff_pair_iteration_count == 0U)
{
/* Calibration of transistors differential pair high (NMOS) */
trimming_diff_pair = OPAMP_FACTORYTRIMMING_N;
opamp1_trimmingvalue = &opamp1_trimmingvaluen;
opamp2_trimmingvalue = &opamp2_trimmingvaluen;
/* Set bit OPAMP_CSR_OPAXCALOUT default state when trimming value */
/* is 00000b. Used to detect the bit toggling during trimming. */
tmp_Opa1calout_DefaultSate = 0U;
tmp_Opa2calout_DefaultSate = 0U;
/* Enable calibration for N differential pair */
MODIFY_REG(OPAMP->CSR, OPAMP_CSR_OPAXCAL_L_ALL,
OPAMP_CSR_OPAXCAL_H_ALL);
}
else /* (trimming_diff_pair_iteration_count == 1) */
{
/* Calibration of transistors differential pair low (PMOS) */
trimming_diff_pair = OPAMP_FACTORYTRIMMING_P;
opamp1_trimmingvalue = &opamp1_trimmingvaluep;
opamp2_trimmingvalue = &opamp2_trimmingvaluep;
/* Set bit OPAMP_CSR_OPAXCALOUT default state when trimming value */
/* is 00000b. Used to detect the bit toggling during trimming. */
tmp_Opa1calout_DefaultSate = (uint32_t) OPAMP_CSR_OPAXCALOUT(hopamp1);
tmp_Opa2calout_DefaultSate = OPAMP_CSR_OPAXCALOUT(hopamp2);
/* Enable calibration for P differential pair */
MODIFY_REG(OPAMP->CSR, OPAMP_CSR_OPAXCAL_H_ALL,
OPAMP_CSR_OPAXCAL_L_ALL);
}
/* Perform calibration parameter search by dichotomy sweep */
/* - Delta initial value 16: for 5 dichotomy steps: 16 for the */
/* initial range, then successive delta sweeps (8, 4, 2, 1). */
/* can extend the search range to +/- 15 units. */
/* - Trimming initial value 15: search range will go from 0 to 30 */
/* (Trimming value 31 is forbidden). */
/* Note: After dichotomy sweep, the trimming result is determined. */
/* However, the final trimming step is deduced from previous */
/* trimming steps tested but is not effectively tested. */
/* An additional test step (using variable "final_step_check") */
/* allow to Test the final trimming step. */
*opamp1_trimmingvalue = 15U;
*opamp2_trimmingvalue = 15U;
delta = 16U;
while ((delta != 0U) || (final_step_check == 1U))
{
/* Set candidate trimming */
MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, *opamp1_trimmingvalue) | tmp_opamp1_otr_otuser);
MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, *opamp2_trimmingvalue) | tmp_opamp2_otr_otuser);
/* Offset trimming time: during calibration, minimum time needed */
/* between two steps to have 1 mV accuracy. */
HAL_Delay(OPAMP_TRIMMING_DELAY);
/* Set flag for additional check of last trimming step equal to */
/* dichotomy step before its division by 2 (equivalent to previous */
/* value of dichotomy step). */
final_step_check = delta;
/* Divide range by 2 to continue dichotomy sweep */
delta >>= 1U;
/* Set trimming values for next iteration in function of trimming */
/* result toggle (versus initial state). */
/* Trimming values update with dichotomy delta of previous */
/* iteration. */
/* Note: on the last trimming loop, delta is equal to 0 and */
/* therefore has no effect. */
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp1)) != tmp_Opa1calout_DefaultSate)
{
/* If calibration output is has toggled, try lower trimming */
*opamp1_trimmingvalue -= delta;
}
else
{
/* If calibration output is has not toggled, try higher trimming */
*opamp1_trimmingvalue += delta;
}
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp2)) != tmp_Opa2calout_DefaultSate)
{
/* If calibration output is has toggled, try lower trimming */
*opamp2_trimmingvalue -= delta;
}
else
{
/* If calibration output is has not toggled, try higher trimming */
*opamp2_trimmingvalue += delta;
}
}
/* Check trimming result of the selected step and perform final fine */
/* trimming. */
/* - If calibration output is has toggled: the current step is */
/* already optimized. */
/* - If calibration output is has not toggled: the current step can */
/* be optimized by incrementing it of one step. */
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp1)) == tmp_Opa1calout_DefaultSate)
{
*opamp1_trimmingvalue += 1U;
/* Set final fine trimming */
MODIFY_REG(*tmp_opamp1_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp1, trimming_diff_pair, *opamp1_trimmingvalue) | tmp_opamp1_otr_otuser);
}
if (READ_BIT(OPAMP->CSR, OPAMP_CSR_OPAXCALOUT(hopamp2)) == tmp_Opa2calout_DefaultSate)
{
*opamp2_trimmingvalue += 1U;
/* Set final fine trimming */
MODIFY_REG(*tmp_opamp2_reg_trimming, OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, OPAMP_TRIM_VALUE_MASK) ,
OPAMP_OFFSET_TRIM_SET(hopamp2, trimming_diff_pair, *opamp2_trimmingvalue) | tmp_opamp2_otr_otuser);
}
}
/* Disable calibration for P and N differential pairs */
/* Disable the selected opamp */
CLEAR_BIT (OPAMP->CSR, (OPAMP_CSR_OPAXCAL_H_ALL |
OPAMP_CSR_OPAXCAL_L_ALL |
OPAMP_CSR_OPAXPD_ALL ));
/* Backup of switches configuration to restore it at the end of the */
/* calibration. */
SET_BIT(OPAMP->CSR, tmp_OpaxSwitchesContextBackup);
/* Self calibration is successful */
/* Store calibration (user trimming) results in init structure. */
/* Set user trimming mode */
hopamp1->Init.UserTrimming = OPAMP_TRIMMING_USER;
hopamp2->Init.UserTrimming = OPAMP_TRIMMING_USER;
/* Affect calibration parameters depending on mode normal/low power */
if (hopamp1->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
{
/* Write calibration result N */
hopamp1->Init.TrimmingValueN = opamp1_trimmingvaluen;
/* Write calibration result P */
hopamp1->Init.TrimmingValueP = opamp1_trimmingvaluep;
}
else
{
/* Write calibration result N */
hopamp1->Init.TrimmingValueNLowPower = opamp1_trimmingvaluen;
/* Write calibration result P */
hopamp1->Init.TrimmingValuePLowPower = opamp1_trimmingvaluep;
}
if (hopamp2->Init.PowerMode != OPAMP_POWERMODE_LOWPOWER)
{
/* Write calibration result N */
hopamp2->Init.TrimmingValueN = opamp2_trimmingvaluen;
/* Write calibration result P */
hopamp2->Init.TrimmingValueP = opamp2_trimmingvaluep;
}
else
{
/* Write calibration result N */
hopamp2->Init.TrimmingValueNLowPower = opamp2_trimmingvaluen;
/* Write calibration result P */
hopamp2->Init.TrimmingValuePLowPower = opamp2_trimmingvaluep;
}
/* Update OPAMP state */
hopamp1->State = HAL_OPAMP_STATE_READY;
hopamp2->State = HAL_OPAMP_STATE_READY;
}
return status;
}
#endif /* STM32L151xD || STM32L152xD || STM32L162xD */
/**
* @}
*/
/** @defgroup OPAMPEx_Exported_Functions_Group2 Extended Peripheral Control functions
* @brief Extended peripheral control functions
*
@verbatim
===============================================================================
##### Peripheral Control functions #####
===============================================================================
[..]
(+) OPAMP unlock.
@endverbatim
* @{
*/
/**
* @brief Unlock the selected OPAMP configuration.
* This function must be called only when OPAMP is in state "locked".
* @param hopamp OPAMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMPEx_Unlock(OPAMP_HandleTypeDef* hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the OPAMP handle allocation */
/* Check if OPAMP locked */
if(hopamp == NULL)
{
status = HAL_ERROR;
}
/* Check the OPAMP handle allocation */
/* Check if OPAMP locked */
else if(hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED)
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
/* OPAMP state changed to locked */
hopamp->State = HAL_OPAMP_STATE_BUSY;
}
else
{
status = HAL_ERROR;
}
return status;
}
/**
* @}
*/
/**
* @}
*/
#endif /* STM32L151xCA || STM32L151xD || STM32L152xCA || STM32L152xD || STM32L162xCA || STM32L162xD || STM32L151xE || STM32L151xDX || STM32L152xE || STM32L152xDX || STM32L162xE || STM32L162xDX || STM32L162xC || STM32L152xC || STM32L151xC */
#endif /* HAL_OPAMP_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/