/**
******************************************************************************
* @file stm32wlxx_hal_dac_ex.c
* @author MCD Application Team
* @brief Extended DAC HAL module driver.
* This file provides firmware functions to manage the extended
* functionalities of the DAC peripheral.
*
*
******************************************************************************
* @attention
*
* Copyright (c) 2020 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
[..]
*** Signal generation operation ***
===================================
[..]
(+) Use HAL_DACEx_TriangleWaveGenerate() to generate Triangle signal.
(+) Use HAL_DACEx_NoiseWaveGenerate() to generate Noise signal.
(+) HAL_DACEx_SelfCalibrate to calibrate one DAC channel.
(+) HAL_DACEx_SetUserTrimming to set user trimming value.
(+) HAL_DACEx_GetTrimOffset to retrieve trimming value (factory setting
after reset, user setting if HAL_DACEx_SetUserTrimming have been used
at least one time after reset).
@endverbatim
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32wlxx_hal.h"
/** @addtogroup STM32WLxx_HAL_Driver
* @{
*/
#ifdef HAL_DAC_MODULE_ENABLED
#if defined(DAC)
/** @defgroup DACEx DACEx
* @brief DAC Extended HAL module driver
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Delay for DAC minimum trimming time. */
/* Note: minimum time needed between two calibration steps */
/* The delay below is specified under conditions: */
/* - DAC channel output buffer enabled */
/* Literal set to maximum value (refer to device datasheet, */
/* electrical characteristics, parameter "tTRIM"). */
/* Unit: us */
#define DAC_DELAY_TRIM_US (50UL) /*!< Delay for DAC minimum trimming time */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup DACEx_Exported_Functions DACEx Exported Functions
* @{
*/
/** @defgroup DACEx_Exported_Functions_Group2 IO operation functions
* @brief Extended IO operation functions
*
@verbatim
==============================================================================
##### Extended features functions #####
==============================================================================
[..] This section provides functions allowing to:
(+) Start conversion.
(+) Stop conversion.
(+) Start conversion and enable DMA transfer.
(+) Stop conversion and disable DMA transfer.
(+) Get result of conversion.
(+) Get result of dual mode conversion.
@endverbatim
* @{
*/
/**
* @brief Enable or disable the selected DAC channel wave generation.
* @param hdac pointer to a DAC_HandleTypeDef structure that contains
* the configuration information for the specified DAC.
* @param Channel The selected DAC channel.
* This parameter can be one of the following values:
* @arg DAC_CHANNEL_1: DAC Channel1 selected
* @param Amplitude Select max triangle amplitude.
* This parameter can be one of the following values:
* @arg DAC_TRIANGLEAMPLITUDE_1: Select max triangle amplitude of 1
* @arg DAC_TRIANGLEAMPLITUDE_3: Select max triangle amplitude of 3
* @arg DAC_TRIANGLEAMPLITUDE_7: Select max triangle amplitude of 7
* @arg DAC_TRIANGLEAMPLITUDE_15: Select max triangle amplitude of 15
* @arg DAC_TRIANGLEAMPLITUDE_31: Select max triangle amplitude of 31
* @arg DAC_TRIANGLEAMPLITUDE_63: Select max triangle amplitude of 63
* @arg DAC_TRIANGLEAMPLITUDE_127: Select max triangle amplitude of 127
* @arg DAC_TRIANGLEAMPLITUDE_255: Select max triangle amplitude of 255
* @arg DAC_TRIANGLEAMPLITUDE_511: Select max triangle amplitude of 511
* @arg DAC_TRIANGLEAMPLITUDE_1023: Select max triangle amplitude of 1023
* @arg DAC_TRIANGLEAMPLITUDE_2047: Select max triangle amplitude of 2047
* @arg DAC_TRIANGLEAMPLITUDE_4095: Select max triangle amplitude of 4095
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DACEx_TriangleWaveGenerate(DAC_HandleTypeDef *hdac, uint32_t Channel, uint32_t Amplitude)
{
/* Check the parameters */
assert_param(IS_DAC_CHANNEL(Channel));
assert_param(IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(Amplitude));
/* Process locked */
__HAL_LOCK(hdac);
/* Change DAC state */
hdac->State = HAL_DAC_STATE_BUSY;
/* Enable the triangle wave generation for the selected DAC channel */
MODIFY_REG(hdac->Instance->CR, ((DAC_CR_WAVE1) | (DAC_CR_MAMP1)) << (Channel & 0x10UL),
(DAC_CR_WAVE1_1 | Amplitude) << (Channel & 0x10UL));
/* Change DAC state */
hdac->State = HAL_DAC_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hdac);
/* Return function status */
return HAL_OK;
}
/**
* @brief Enable or disable the selected DAC channel wave generation.
* @param hdac pointer to a DAC_HandleTypeDef structure that contains
* the configuration information for the specified DAC.
* @param Channel The selected DAC channel.
* This parameter can be one of the following values:
* @arg DAC_CHANNEL_1: DAC Channel1 selected
* @param Amplitude Unmask DAC channel LFSR for noise wave generation.
* This parameter can be one of the following values:
* @arg DAC_LFSRUNMASK_BIT0: Unmask DAC channel LFSR bit0 for noise wave generation
* @arg DAC_LFSRUNMASK_BITS1_0: Unmask DAC channel LFSR bit[1:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS2_0: Unmask DAC channel LFSR bit[2:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS3_0: Unmask DAC channel LFSR bit[3:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS4_0: Unmask DAC channel LFSR bit[4:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS5_0: Unmask DAC channel LFSR bit[5:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS6_0: Unmask DAC channel LFSR bit[6:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS7_0: Unmask DAC channel LFSR bit[7:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS8_0: Unmask DAC channel LFSR bit[8:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS9_0: Unmask DAC channel LFSR bit[9:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS10_0: Unmask DAC channel LFSR bit[10:0] for noise wave generation
* @arg DAC_LFSRUNMASK_BITS11_0: Unmask DAC channel LFSR bit[11:0] for noise wave generation
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DACEx_NoiseWaveGenerate(DAC_HandleTypeDef *hdac, uint32_t Channel, uint32_t Amplitude)
{
/* Check the parameters */
assert_param(IS_DAC_CHANNEL(Channel));
assert_param(IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(Amplitude));
/* Process locked */
__HAL_LOCK(hdac);
/* Change DAC state */
hdac->State = HAL_DAC_STATE_BUSY;
/* Enable the noise wave generation for the selected DAC channel */
MODIFY_REG(hdac->Instance->CR, ((DAC_CR_WAVE1) | (DAC_CR_MAMP1)) << (Channel & 0x10UL),
(DAC_CR_WAVE1_0 | Amplitude) << (Channel & 0x10UL));
/* Change DAC state */
hdac->State = HAL_DAC_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hdac);
/* Return function status */
return HAL_OK;
}
/**
* @brief Run the self calibration of one DAC channel.
* @param hdac pointer to a DAC_HandleTypeDef structure that contains
* the configuration information for the specified DAC.
* @param sConfig DAC channel configuration structure.
* @param Channel The selected DAC channel.
* This parameter can be one of the following values:
* @arg DAC_CHANNEL_1: DAC Channel1 selected
* @retval Updates DAC_TrimmingValue. , DAC_UserTrimming set to DAC_UserTrimming
* @retval HAL status
* @note Calibration runs about 7 ms.
*/
HAL_StatusTypeDef HAL_DACEx_SelfCalibrate(DAC_HandleTypeDef *hdac, DAC_ChannelConfTypeDef *sConfig, uint32_t Channel)
{
HAL_StatusTypeDef status = HAL_OK;
__IO uint32_t tmp;
uint32_t trimmingvalue;
uint32_t delta;
__IO uint32_t wait_loop_index;
/* store/restore channel configuration structure purpose */
uint32_t oldmodeconfiguration;
/* Check the parameters */
assert_param(IS_DAC_CHANNEL(Channel));
/* Check the DAC handle allocation */
/* Check if DAC running */
if (hdac == NULL)
{
status = HAL_ERROR;
}
else if (hdac->State == HAL_DAC_STATE_BUSY)
{
status = HAL_ERROR;
}
else
{
/* Process locked */
__HAL_LOCK(hdac);
/* Store configuration */
oldmodeconfiguration = (hdac->Instance->MCR & (DAC_MCR_MODE1 << (Channel & 0x10UL)));
/* Disable the selected DAC channel */
CLEAR_BIT((hdac->Instance->CR), (DAC_CR_EN1 << (Channel & 0x10UL)));
/* Set mode in MCR for calibration */
MODIFY_REG(hdac->Instance->MCR, (DAC_MCR_MODE1 << (Channel & 0x10UL)), 0U);
/* Set DAC Channel1 DHR register to the middle value */
tmp = (uint32_t)hdac->Instance;
if (Channel == DAC_CHANNEL_1)
{
tmp += DAC_DHR12R1_ALIGNMENT(DAC_ALIGN_12B_R);
}
*(__IO uint32_t *) tmp = 0x0800UL;
/* Enable the selected DAC channel calibration */
/* i.e. set DAC_CR_CENx bit */
SET_BIT((hdac->Instance->CR), (DAC_CR_CEN1 << (Channel & 0x10UL)));
/* Init trimming counter */
/* Medium value */
trimmingvalue = 16UL;
delta = 8UL;
while (delta != 0UL)
{
/* Set candidate trimming */
MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1 << (Channel & 0x10UL)), (trimmingvalue << (Channel & 0x10UL)));
/* Wait minimum time needed between two calibration steps (OTRIM) */
/* Wait loop initialization and execution */
/* Note: Variable divided by 2 to compensate partially CPU processing cycles, scaling in us split to not exceed */
/* 32 bits register capacity and handle low frequency. */
wait_loop_index = ((DAC_DELAY_TRIM_US / 10UL) * ((SystemCoreClock / (100000UL * 2UL)) + 1UL));
while(wait_loop_index != 0UL)
{
wait_loop_index--;
}
if ((hdac->Instance->SR & (DAC_SR_CAL_FLAG1 << (Channel & 0x10UL))) == (DAC_SR_CAL_FLAG1 << (Channel & 0x10UL)))
{
/* DAC_SR_CAL_FLAGx is HIGH try higher trimming */
trimmingvalue -= delta;
}
else
{
/* DAC_SR_CAL_FLAGx is LOW try lower trimming */
trimmingvalue += delta;
}
delta >>= 1UL;
}
/* Still need to check if right calibration is current value or one step below */
/* Indeed the first value that causes the DAC_SR_CAL_FLAGx bit to change from 0 to 1 */
/* Set candidate trimming */
MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1 << (Channel & 0x10UL)), (trimmingvalue << (Channel & 0x10UL)));
/* Wait minimum time needed between two calibration steps (OTRIM) */
/* Wait loop initialization and execution */
/* Note: Variable divided by 2 to compensate partially CPU processing cycles, scaling in us split to not exceed */
/* 32 bits register capacity and handle low frequency. */
wait_loop_index = ((DAC_DELAY_TRIM_US / 10UL) * ((SystemCoreClock / (100000UL * 2UL)) + 1UL));
while(wait_loop_index != 0UL)
{
wait_loop_index--;
}
if ((hdac->Instance->SR & (DAC_SR_CAL_FLAG1 << (Channel & 0x10UL))) == 0UL)
{
/* Trimming is actually one value more */
trimmingvalue++;
/* Set right trimming */
MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1 << (Channel & 0x10UL)), (trimmingvalue << (Channel & 0x10UL)));
}
/* Disable the selected DAC channel calibration */
/* i.e. clear DAC_CR_CENx bit */
CLEAR_BIT((hdac->Instance->CR), (DAC_CR_CEN1 << (Channel & 0x10UL)));
sConfig->DAC_TrimmingValue = trimmingvalue;
sConfig->DAC_UserTrimming = DAC_TRIMMING_USER;
/* Restore configuration */
MODIFY_REG(hdac->Instance->MCR, (DAC_MCR_MODE1 << (Channel & 0x10UL)), oldmodeconfiguration);
/* Process unlocked */
__HAL_UNLOCK(hdac);
}
return status;
}
/**
* @brief Set the trimming mode and trimming value (user trimming mode applied).
* @param hdac pointer to a DAC_HandleTypeDef structure that contains
* the configuration information for the specified DAC.
* @param sConfig DAC configuration structure updated with new DAC trimming value.
* @param Channel The selected DAC channel.
* This parameter can be one of the following values:
* @arg DAC_CHANNEL_1: DAC Channel1 selected
* @param NewTrimmingValue DAC new trimming value
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DACEx_SetUserTrimming(DAC_HandleTypeDef *hdac, DAC_ChannelConfTypeDef *sConfig, uint32_t Channel,
uint32_t NewTrimmingValue)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the parameters */
assert_param(IS_DAC_CHANNEL(Channel));
assert_param(IS_DAC_NEWTRIMMINGVALUE(NewTrimmingValue));
/* Check the DAC handle allocation */
if (hdac == NULL)
{
status = HAL_ERROR;
}
else
{
/* Process locked */
__HAL_LOCK(hdac);
/* Set new trimming */
MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1 << (Channel & 0x10UL)), (NewTrimmingValue << (Channel & 0x10UL)));
/* Update trimming mode */
sConfig->DAC_UserTrimming = DAC_TRIMMING_USER;
sConfig->DAC_TrimmingValue = NewTrimmingValue;
/* Process unlocked */
__HAL_UNLOCK(hdac);
}
return status;
}
/**
* @brief Return the DAC trimming value.
* @param hdac DAC handle
* @param Channel The selected DAC channel.
* This parameter can be one of the following values:
* @arg DAC_CHANNEL_1: DAC Channel1 selected
* @retval Trimming value : range: 0->31
*
*/
uint32_t HAL_DACEx_GetTrimOffset(const DAC_HandleTypeDef *hdac, uint32_t Channel)
{
/* Check the parameter */
assert_param(IS_DAC_CHANNEL(Channel));
/* Retrieve trimming */
return ((hdac->Instance->CCR & (DAC_CCR_OTRIM1 << (Channel & 0x10UL))) >> (Channel & 0x10UL));
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* DAC */
#endif /* HAL_DAC_MODULE_ENABLED */
/**
* @}
*/