tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F3XX/stm32f30x_opamp.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32f30x_opamp.c
   4   * @author  MCD Application Team
   5   * @version V1.1.0
   6   * @date    27-February-2014
   7   * @brief   This file provides firmware functions to manage the following
   8   *          functionalities of the operational amplifiers (OPAMP1,...OPAMP4) peripheral:
   9   *           + OPAMP Configuration
  10   *           + OPAMP calibration
  11   *
  12   @verbatim
  13
  14   ==============================================================================
  15                         ##### OPAMP Peripheral Features #####
  16   ==============================================================================
  17
  18   [..]
  19       The device integrates 4 operational amplifiers OPAMP1, OPAMP2, OPAMP3 and OPAMP4:
  20
  21       (+) The OPAMPs non inverting input can be selected among the list shown by
  22           table below.
  23
  24       (+) The OPAMPs inverting input can be selected among the list shown by
  25           table below.
  26
  27       (+) The OPAMPs outputs can be internally connected to the inverting input
  28           (follower mode)
  29       (+) The OPAMPs outputs can be internally connected to resistor feedback
  30           output (Programmable Gain Amplifier mode)
  31
  32       (+) The OPAMPs outputs can be internally connected to ADC
  33
  34       (+) The OPAMPs can be calibrated to compensate the offset compensation
  35
  36       (+) Timer-controlled Mux for automatic switch of inverting and
  37           non-inverting input
  38
  39   OPAMPs inverting/non-inverting inputs:
  40     +--------------------------------------------------------------+
  41     |                 |        | OPAMP1 | OPAMP2 | OPAMP3 | OPAMP4 |
  42     |-----------------|--------|--------|--------|--------|--------|
  43     |                 | PGA    |  OK    |  OK    |  OK    |  OK    |
  44     | Inverting Input | Vout   |  OK    |  OK    |  OK    |  OK    |
  45     |                 | IO1    |  PC5   |  PC5   |  PB10  |  PB10  |
  46     |                 | IO2    |  PA3   |  PA5   |  PB2   |  PD8   |
  47     |-----------------|--------|--------|--------|--------|--------|
  48     |                 | IO1    |  PA7   |  PD14  |  PB13  |  PD11  |
  49     |  Non Inverting  | IO2    |  PA5   |  PB14  |  PA5   |  PB11  |
  50     |    Input        | IO3    |  PA3   |  PB0   |  PA1   |  PA4   |
  51     |                 | IO4    |  PA1   |  PA7   |  PB0   |  PB13  |
  52     +--------------------------------------------------------------+
  53
  54                         ##### How to use this driver #####
  55   ==============================================================================
  56   [..]
  57   This driver provides functions to configure and program the OPAMP
  58   of all STM32F30x devices.
  59
  60   To use the OPAMP, perform the following steps:
  61
  62   (#) Enable the SYSCFG APB clock to get write access to OPAMP
  63       register using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
  64
  65   (#) Configure the OPAMP input in analog mode using GPIO_Init()
  66
  67   (#) Configure the OPAMP using OPAMP_Init() function:
  68       (++) Select the inverting input
  69       (++) Select the non-inverting inverting input
  70
  71   (#) Enable the OPAMP using OPAMP_Cmd() function
  72
  73   @endverbatim
  74
  75   ******************************************************************************
  76   * @attention
  77   *
  78   * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
  79   *
  80   * Redistribution and use in source and binary forms, with or without modification,
  81   * are permitted provided that the following conditions are met:
  82   *   1. Redistributions of source code must retain the above copyright notice,
  83   *      this list of conditions and the following disclaimer.
  84   *   2. Redistributions in binary form must reproduce the above copyright notice,
  85   *      this list of conditions and the following disclaimer in the documentation
  86   *      and/or other materials provided with the distribution.
  87   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  88   *      may be used to endorse or promote products derived from this software
  89   *      without specific prior written permission.
  90   *
  91   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  92   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  93   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  94   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  95   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  96   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  97   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  98   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  99   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 100   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 101   *
 102   ******************************************************************************
 103   */
 104
 105 /* Includes ------------------------------------------------------------------*/
 106 #include "stm32f30x_opamp.h"
 107
 108 /** @addtogroup STM32F30x_StdPeriph_Driver
 109   * @{
 110   */
 111
 112 /** @defgroup OPAMP
 113   * @brief OPAMP driver modules
 114   * @{
 115   */
 116
 117 /* Private typedef -----------------------------------------------------------*/
 118 /* Private define ------------------------------------------------------------*/
 119 #define OPAMP_CSR_DEFAULT_MASK                    ((uint32_t)0xFFFFFF93)
 120 #define OPAMP_CSR_TIMERMUX_MASK                   ((uint32_t)0xFFFFF8FF)
 121 #define OPAMP_CSR_TRIMMING_MASK                   ((uint32_t)0x0000001F)
 122
 123 /* Private macro -------------------------------------------------------------*/
 124 /* Private variables ---------------------------------------------------------*/
 125 /* Private function prototypes -----------------------------------------------*/
 126 /* Private functions ---------------------------------------------------------*/
 127
 128 /** @defgroup OPAMP_Private_Functions
 129   * @{
 130   */
 131
 132 /** @defgroup OPAMP_Group1 Initialization and Configuration functions
 133  *  @brief   Initialization and Configuration functions
 134  *
 135 @verbatim
 136  ===============================================================================
 137              ##### Initialization and Configuration functions #####
 138  ===============================================================================
 139
 140 @endverbatim
 141   * @{
 142   */
 143
 144 /**
 145   * @brief  Deinitializes OPAMP peripheral registers to their default reset values.
 146   * @note   Deinitialization can't be performed if the OPAMP configuration is locked.
 147   *         To unlock the configuration, perform a system reset.
 148   * @param  OPAMP_Selection: the selected OPAMP.
 149   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 150   *          to select the OPAMP peripheral.
 151   * @param  None
 152   * @retval None
 153   */
 154 void OPAMP_DeInit(uint32_t OPAMP_Selection)
 155 {
 156   /*!< Set OPAMP_CSR register to reset value */
 157   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = ((uint32_t)0x00000000);
 158 }
 159
 160 /**
 161   * @brief  Initializes the OPAMP peripheral according to the specified parameters
 162   *         in OPAMP_InitStruct
 163   * @note   If the selected OPAMP is locked, initialization can't be performed.
 164   *         To unlock the configuration, perform a system reset.
 165   * @param  OPAMP_Selection: the selected OPAMP.
 166   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 167   *          to select the OPAMP peripheral.
 168   * @param  OPAMP_InitStruct: pointer to an OPAMP_InitTypeDef structure that contains
 169   *         the configuration information for the specified OPAMP peripheral.
 170   *           - OPAMP_InvertingInput specifies the inverting input of OPAMP
 171   *           - OPAMP_NonInvertingInput specifies the non inverting input of OPAMP
 172   * @retval None
 173   */
 174 void OPAMP_Init(uint32_t OPAMP_Selection, OPAMP_InitTypeDef* OPAMP_InitStruct)
 175 {
 176   uint32_t tmpreg = 0;
 177
 178   /* Check the parameters */
 179   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 180   assert_param(IS_OPAMP_INVERTING_INPUT(OPAMP_InitStruct->OPAMP_InvertingInput));
 181   assert_param(IS_OPAMP_NONINVERTING_INPUT(OPAMP_InitStruct->OPAMP_NonInvertingInput));
 182
 183   /*!< Get the OPAMPx_CSR register value */
 184   tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
 185
 186   /*!< Clear the inverting and non inverting bits selection bits */
 187   tmpreg &= (uint32_t) (OPAMP_CSR_DEFAULT_MASK);
 188
 189   /*!< Configure OPAMP: inverting and non inverting inputs */
 190   tmpreg |= (uint32_t)(OPAMP_InitStruct->OPAMP_InvertingInput | OPAMP_InitStruct->OPAMP_NonInvertingInput);
 191
 192   /*!< Write to OPAMPx_CSR register */
 193   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
 194 }
 195
 196 /**
 197   * @brief  Fills each OPAMP_InitStruct member with its default value.
 198   * @param  OPAMP_InitStruct: pointer to an OPAMP_InitTypeDef structure which will
 199   *         be initialized.
 200   * @retval None
 201   */
 202 void OPAMP_StructInit(OPAMP_InitTypeDef* OPAMP_InitStruct)
 203 {
 204   OPAMP_InitStruct->OPAMP_NonInvertingInput = OPAMP_NonInvertingInput_IO1;
 205   OPAMP_InitStruct->OPAMP_InvertingInput = OPAMP_InvertingInput_IO1;
 206 }
 207
 208 /**
 209   * @brief  Configure the feedback resistor gain.
 210   * @note   If the selected OPAMP is locked, gain configuration can't be performed.
 211   *         To unlock the configuration, perform a system reset.
 212   * @param  OPAMP_Selection: the selected OPAMP.
 213   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 214   *          to select the OPAMP peripheral.
 215   * @param  NewState: new state of the OPAMP peripheral.
 216   *         This parameter can be: ENABLE or DISABLE.
 217   * @retval None
 218   */
 219 void OPAMP_PGAConfig(uint32_t OPAMP_Selection, uint32_t OPAMP_PGAGain, uint32_t OPAMP_PGAConnect)
 220 {
 221   /* Check the parameters */
 222   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 223   assert_param(IS_OPAMP_PGAGAIN(OPAMP_PGAGain));
 224   assert_param(IS_OPAMP_PGACONNECT(OPAMP_PGAConnect));
 225
 226   /* Reset the configuration bits */
 227   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_PGGAIN);
 228
 229   /* Set the new configuration */
 230   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_PGAGain | OPAMP_PGAConnect);
 231 }
 232
 233 /**
 234   * @brief  Configure the OPAMP's internal reference.
 235   * @note   This feature is used when calibration enabled or OPAMP's reference
 236   *         connected to the non inverting input.
 237   * @note   If the selected OPAMP is locked, Vref configuration can't be performed.
 238   *         To unlock the configuration, perform a system reset.
 239   * @param  OPAMP_Selection: the selected OPAMP.
 240   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 241   *          to select the OPAMP peripheral.
 242   * @param  OPAMP_Vref: This parameter can be:
 243   *           OPAMP_Vref_3VDDA: OPMAP Vref = 3.3% VDDA
 244   *           OPAMP_Vref_10VDDA: OPMAP Vref = 10% VDDA
 245   *           OPAMP_Vref_50VDDA: OPMAP Vref = 50% VDDA
 246   *           OPAMP_Vref_90VDDA: OPMAP Vref = 90% VDDA
 247   * @retval None
 248   */
 249 void OPAMP_VrefConfig(uint32_t OPAMP_Selection, uint32_t OPAMP_Vref)
 250 {
 251   uint32_t tmpreg = 0;
 252
 253   /* Check the parameters */
 254   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 255   assert_param(IS_OPAMP_VREF(OPAMP_Vref));
 256
 257   /*!< Get the OPAMPx_CSR register value */
 258   tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
 259
 260   /*!< Clear the CALSEL bits */
 261   tmpreg &= (uint32_t) (~OPAMP_CSR_CALSEL);
 262
 263   /*!< Configure OPAMP reference */
 264   tmpreg |= (uint32_t)(OPAMP_Vref);
 265
 266   /*!< Write to OPAMPx_CSR register */
 267   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
 268 }
 269
 270 /**
 271   * @brief  Connnect the internal reference to the OPAMP's non inverting input.
 272   * @note   If the selected OPAMP is locked, Vref configuration can't be performed.
 273   *         To unlock the configuration, perform a system reset.
 274   * @param  OPAMP_Selection: the selected OPAMP.
 275   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 276   *          to select the OPAMP peripheral.
 277   * @param  NewState: new state of the OPAMP peripheral.
 278   *         This parameter can be: ENABLE or DISABLE.
 279   * @retval None
 280   */
 281 void OPAMP_VrefConnectNonInvertingInput(uint32_t OPAMP_Selection, FunctionalState NewState)
 282 {
 283   /* Check the parameters */
 284   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 285   assert_param(IS_FUNCTIONAL_STATE(NewState));
 286
 287   if (NewState != DISABLE)
 288   {
 289     /* Connnect the internal reference to the OPAMP's non inverting input */
 290     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_FORCEVP);
 291   }
 292   else
 293   {
 294     /* Disconnnect the internal reference to the OPAMP's non inverting input */
 295     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_FORCEVP);
 296   }
 297 }
 298
 299 /**
 300   * @brief  Enables or disables connecting the OPAMP's internal reference to ADC.
 301   * @note   If the selected OPAMP is locked, Vref connection can't be performed.
 302   *         To unlock the configuration, perform a system reset.
 303   * @param  NewState: new state of the Vrefint output.
 304   *         This parameter can be: ENABLE or DISABLE.
 305   * @retval None
 306   */
 307 void OPAMP_VrefConnectADCCmd(uint32_t OPAMP_Selection, FunctionalState NewState)
 308 {
 309   /* Check the parameters */
 310   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 311   assert_param(IS_FUNCTIONAL_STATE(NewState));
 312
 313   if (NewState != DISABLE)
 314   {
 315     /* Enable output internal reference */
 316     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_TSTREF);
 317   }
 318   else
 319   {
 320     /* Disable output internal reference */
 321     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_TSTREF);
 322   }
 323 }
 324
 325 /**
 326   * @brief  Configure the OPAMP peripheral (secondary inputs) for timer-controlled
 327   *          mux mode according to the specified parameters in OPAMP_InitStruct.
 328   * @note   If the selected OPAMP is locked, timer-controlled mux configuration
 329   *         can't be performed.
 330   *         To unlock the configuration, perform a system reset.
 331   * @param  OPAMP_Selection: the selected OPAMP.
 332   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 333   *          to select the OPAMP peripheral.
 334   * @param  OPAMP_InitStruct: pointer to an OPAMP_InitTypeDef structure that contains
 335   *         the configuration information for the specified OPAMP peripheral.
 336   *           - OPAMP_InvertingInput specifies the inverting input of OPAMP
 337   *           - OPAMP_NonInvertingInput specifies the non inverting input of OPAMP
 338   * @note   PGA and Vout can't be selected as seconadry inverting input.
 339   * @retval None
 340   */
 341 void OPAMP_TimerControlledMuxConfig(uint32_t OPAMP_Selection, OPAMP_InitTypeDef* OPAMP_InitStruct)
 342 {
 343   uint32_t tmpreg = 0;
 344
 345   /* Check the parameters */
 346   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 347   assert_param(IS_OPAMP_SECONDARY_INVINPUT(OPAMP_InitStruct->OPAMP_InvertingInput));
 348   assert_param(IS_OPAMP_NONINVERTING_INPUT(OPAMP_InitStruct->OPAMP_NonInvertingInput));
 349
 350   /*!< Get the OPAMPx_CSR register value */
 351   tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
 352
 353   /*!< Clear the secondary inverting bit, secondary non inverting bit and TCMEN bits */
 354   tmpreg &= (uint32_t) (OPAMP_CSR_TIMERMUX_MASK);
 355
 356   /*!< Configure OPAMP: secondary inverting and non inverting inputs */
 357   tmpreg |= (uint32_t)((uint32_t)(OPAMP_InitStruct->OPAMP_InvertingInput<<3) | (uint32_t)(OPAMP_InitStruct->OPAMP_NonInvertingInput<<7));
 358
 359   /*!< Write to OPAMPx_CSR register */
 360   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
 361 }
 362
 363 /**
 364   * @brief  Enable or disable the timer-controlled mux mode.
 365   * @note   If the selected OPAMP is locked, enable/disable can't be performed.
 366   *         To unlock the configuration, perform a system reset.
 367   * @param  OPAMP_Selection: the selected OPAMP.
 368   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 369   *          to select the OPAMP peripheral.
 370   * @param  NewState: new state of the OPAMP peripheral.
 371   *         This parameter can be: ENABLE or DISABLE.
 372   * @retval None
 373   */
 374 void OPAMP_TimerControlledMuxCmd(uint32_t OPAMP_Selection, FunctionalState NewState)
 375 {
 376   /* Check the parameters */
 377   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 378   assert_param(IS_FUNCTIONAL_STATE(NewState));
 379
 380   if (NewState != DISABLE)
 381   {
 382     /* Enable the timer-controlled Mux mode */
 383     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_TCMEN);
 384   }
 385   else
 386   {
 387     /* Disable the timer-controlled Mux mode */
 388     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_TCMEN);
 389   }
 390 }
 391
 392 /**
 393   * @brief  Enable or disable the OPAMP peripheral.
 394   * @note   If the selected OPAMP is locked, enable/disable can't be performed.
 395   *         To unlock the configuration, perform a system reset.
 396   * @param  OPAMP_Selection: the selected OPAMP.
 397   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 398   *          to select the OPAMP peripheral.
 399   * @param  NewState: new state of the OPAMP peripheral.
 400   *         This parameter can be: ENABLE or DISABLE.
 401   * @retval None
 402   */
 403 void OPAMP_Cmd(uint32_t OPAMP_Selection, FunctionalState NewState)
 404 {
 405   /* Check the parameters */
 406   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 407   assert_param(IS_FUNCTIONAL_STATE(NewState));
 408
 409   if (NewState != DISABLE)
 410   {
 411     /* Enable the selected OPAMPx peripheral */
 412     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_OPAMPxEN);
 413   }
 414   else
 415   {
 416     /* Disable the selected OPAMPx peripheral */
 417     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_OPAMPxEN);
 418   }
 419 }
 420
 421 /**
 422   * @brief  Return the output level (high or low) during calibration of the selected OPAMP.
 423   * @param  OPAMP_Selection: the selected OPAMP.
 424   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 425   *          to select the OPAMP peripheral.
 426   *           - OPAMP output is low when the non-inverting input is at a lower
 427   *             voltage than the inverting input
 428   *           - OPAMP output is high when the non-inverting input is at a higher
 429   *             voltage than the inverting input
 430   * @note OPAMP ouput level is provided only during calibration phase.
 431   * @retval Returns the selected OPAMP output level: low or high.
 432   *
 433   */
 434 uint32_t OPAMP_GetOutputLevel(uint32_t OPAMP_Selection)
 435 {
 436   uint32_t opampout = 0x0;
 437
 438   /* Check the parameters */
 439   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 440
 441   /* Check if selected OPAMP output is high */
 442   if ((*(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) & (OPAMP_CSR_OUTCAL)) != 0)
 443   {
 444     opampout = OPAMP_OutputLevel_High;
 445   }
 446   else
 447   {
 448     opampout = OPAMP_OutputLevel_Low;
 449   }
 450
 451   /* Return the OPAMP output level */
 452   return (uint32_t)(opampout);
 453 }
 454
 455 /**
 456   * @brief  Select the trimming mode.
 457   * @param  OffsetTrimming: the selected offset trimming mode.
 458   *   This parameter  can be one of the following values:
 459   *     @arg OPAMP_Trimming_Factory: factory trimming values are used for offset
 460   *                                  calibration
 461   *     @arg OPAMP_Trimming_User: user trimming values are used for offset
 462   *                               calibration
 463   * @note When OffsetTrimming_User is selected, use OPAMP_OffsetTrimConfig()
 464   *       function or OPAMP_OffsetTrimLowPowerConfig() function to adjust
 465   *       trimming value.
 466   * @retval None
 467   */
 468 void OPAMP_OffsetTrimModeSelect(uint32_t OPAMP_Selection, uint32_t OPAMP_Trimming)
 469 {
 470   /* Check the parameters */
 471   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 472   assert_param(IS_OPAMP_TRIMMING(OPAMP_Trimming));
 473
 474   /* Reset USERTRIM bit */
 475   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (~(uint32_t) (OPAMP_CSR_USERTRIM));
 476
 477   /* Select trimming mode */
 478   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= OPAMP_Trimming;
 479 }
 480
 481 /**
 482   * @brief  Configure the trimming value of the OPAMP.
 483   * @param  OPAMP_Selection: the selected OPAMP.
 484   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 485   *          to select the OPAMP peripheral.
 486   * @param  OPAMP_Input: the selected OPAMP input.
 487   *   This parameter can be one of the following values:
 488   *         @arg OPAMP_Input_Inverting: Inverting input is selected to configure the trimming value
 489   *         @arg OPAMP_Input_NonInverting: Non inverting input is selected to configure the trimming value
 490   * @param  OPAMP_TrimValue: the trimming value. This parameter can be any value lower
 491   *         or equal to 0x0000001F.
 492   * @retval None
 493   */
 494 void OPAMP_OffsetTrimConfig(uint32_t OPAMP_Selection, uint32_t OPAMP_Input, uint32_t OPAMP_TrimValue)
 495 {
 496   uint32_t tmpreg = 0;
 497
 498   /* Check the parameters */
 499   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 500   assert_param(IS_OPAMP_INPUT(OPAMP_Input));
 501   assert_param(IS_OPAMP_TRIMMINGVALUE(OPAMP_TrimValue));
 502
 503   /*!< Get the OPAMPx_CSR register value */
 504   tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
 505
 506   /*!< Clear the trimming bits */
 507   tmpreg &= ((uint32_t)~(OPAMP_CSR_TRIMMING_MASK<<OPAMP_Input));
 508
 509   /*!< Configure the new trimming value */
 510   tmpreg |= (uint32_t)(OPAMP_TrimValue<<OPAMP_Input);
 511
 512   /*!< Write to OPAMPx_CSR register */
 513   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
 514 }
 515
 516 /**
 517   * @brief  Start or stop the calibration of selected OPAMP peripheral.
 518   * @note   If the selected OPAMP is locked, start/stop can't be performed.
 519   *         To unlock the configuration, perform a system reset.
 520   * @param  OPAMP_Selection: the selected OPAMP.
 521   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 522   *          to select the OPAMP peripheral.
 523   * @param  NewState: new state of the OPAMP peripheral.
 524   *         This parameter can be: ENABLE or DISABLE.
 525   * @retval None
 526   */
 527 void OPAMP_StartCalibration(uint32_t OPAMP_Selection, FunctionalState NewState)
 528 {
 529   /* Check the parameters */
 530   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 531   assert_param(IS_FUNCTIONAL_STATE(NewState));
 532
 533   if (NewState != DISABLE)
 534   {
 535     /* Start the OPAMPx calibration */
 536     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_CALON);
 537   }
 538   else
 539   {
 540     /* Stop the OPAMPx calibration */
 541     *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_CALON);
 542   }
 543 }
 544
 545 /**
 546   * @}
 547   */
 548
 549 /** @defgroup OPAMP_Group2 OPAMP configuration locking function
 550  *  @brief   OPAMP1,...OPAMP4 configuration locking function
 551  *           OPAMP1,...OPAMP4 configuration can be locked each separately.
 552  *           Unlocking is performed by system reset.
 553  *
 554 @verbatim
 555  ===============================================================================
 556                      ##### Configuration Lock function #####
 557  ===============================================================================
 558
 559 @endverbatim
 560   * @{
 561   */
 562
 563 /**
 564   * @brief  Lock the selected OPAMP configuration.
 565   * @note   Locking the configuration means that all control bits are read-only.
 566   *         To unlock the OPAMP configuration, perform a system reset.
 567   * @param  OPAMP_Selection: the selected OPAMP.
 568   *          This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
 569   *          to select the OPAMP peripheral.
 570   * @retval None
 571   */
 572 void OPAMP_LockConfig(uint32_t OPAMP_Selection)
 573 {
 574   /* Check the parameter */
 575   assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
 576
 577   /* Set the lock bit corresponding to selected OPAMP */
 578   *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_LOCK);
 579 }
 580
 581 /**
 582   * @}
 583   */
 584
 585 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/