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cy_capsense_processing.c
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/***************************************************************************//**
* \file cy_capsense_processing.c
* \version 3.0
*
* \brief
* This file provides the source code for the Data Processing module functions.
* The Data Processing module is responsible for the low-level raw count
* processing provided by the sensing module, maintaining baseline and
* difference values and performing high-level widget processing like
* updating button status or calculating slider position.
*
********************************************************************************
* \copyright
* Copyright 2018-2020, Cypress Semiconductor Corporation. All rights reserved.
* You may use this file only in accordance with the license, terms, conditions,
* disclaimers, and limitations in the end user license agreement accompanying
* the software package with which this file was provided.
*******************************************************************************/
#include "cy_syslib.h"
#include <stddef.h>
#include <string.h>
#include "cy_capsense_common.h"
#include "cy_capsense_processing.h"
#include "cy_capsense_filter.h"
#include "cy_capsense_lib.h"
#include "cy_capsense_centroid.h"
#if (defined(CY_IP_MXCSDV2) || defined(CY_IP_M0S8CSDV2) || defined(CY_IP_M0S8MSCV3))
/*******************************************************************************
* Local definition
*******************************************************************************/
/* Raw data normalization and scaling */
#define CY_CAPSENSE_SCALING_SHIFT (15)
#define CY_CAPSENSE_MAX_TX_PATTERN_NUM (32)
/*******************************************************************************
* Function Prototypes
*******************************************************************************/
/******************************************************************************/
/** \cond SECTION_CAPSENSE_INTERNAL */
/** \addtogroup group_capsense_internal *//** \{ */
/******************************************************************************/
#if (CY_CAPSENSE_PLATFORM_BLOCK_MSCV3)
static uint16_t Cy_CapSense_ConvertToUint16(int32_t sample);
#endif /* CY_CAPSENSE_PLATFORM_BLOCK_MSCV3 */
/** \} \endcond */
/*******************************************************************************
* Function Name: Cy_CapSense_InitializeAllStatuses
****************************************************************************//**
*
* Performs initialization of all statuses and related modules including
* debounce counters and touch positions of all the widgets.
*
* The initialization includes the following tasks:
* * Reset the debounce counters of all the widgets.
* * Reset the number of touches.
* * Reset the position filter history for slider and touchpad widgets.
* * Clear all status of widgets and sensors.
* * Enable all the widgets.
*
* Calling this function is accompanied by
* * Cy_CapSense_InitializeAllBaselines().
* * Cy_CapSense_InitializeAllFilters().
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_InitializeAllStatuses(const cy_stc_capsense_context_t * context)
{
uint32_t widgetId;
for(widgetId = context->ptrCommonConfig->numWd; widgetId-- > 0u;)
{
Cy_CapSense_InitializeWidgetStatus(widgetId, context);
Cy_CapSense_InitializeWidgetGestures(widgetId, context);
}
}
/*******************************************************************************
* Function Name: Cy_CapSense_InitializeWidgetStatus
****************************************************************************//**
*
* Performs initialization of all statuses, debounce counters, and touch positions
* of the specified widget.
*
* The initialization includes:
* * Resets the debounce counter of the widget.
* * Resets the number of touches.
* * Resets the position filter history for slider and touchpad widgets.
* * Clears widget and sensor statuses.
* * Enables the widget.
*
* The Button and Matrix Button widgets have individual debounce counters per
* sensor for the CSD widgets and per node for the CSX widgets.
*
* The Slider and Touchpad widgets have a single debounce counter per widget.
*
* The Proximity widget has two debounce counters per sensor. One is for the
* proximity event and the second is for the touch event.
*
* All debounce counters during initialization are set to the value of the
* onDebounce widget parameter.
*
* Calling this function is accompanied by
* * Cy_CapSense_InitializeWidgetBaseline().
* * Cy_CapSense_InitializeWidgetFilter().
*
* \param widgetId
* Specifies the ID number of the widget. A macro for the widget ID can be found
* in the cycfg_capsense.h file defined as CY_CAPSENSE_<WIDGET_NAME>_WDGT_ID.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_InitializeWidgetStatus(
uint32_t widgetId,
const cy_stc_capsense_context_t * context)
{
uint32_t snsIndex;
uint32_t filterSize;
const cy_stc_capsense_widget_config_t * ptrWdCfg = &context->ptrWdConfig[widgetId];
cy_stc_capsense_widget_context_t * ptrWdCxt = ptrWdCfg->ptrWdContext;
cy_stc_capsense_sensor_context_t * ptrSnsCxt = ptrWdCfg->ptrSnsContext;
uint32_t snsNumber = ptrWdCfg->numSns;
cy_stc_capsense_position_t * ptrHistory;
/* Clear widget statuses (Non active, Not disabled, Working) */
ptrWdCxt->status &= (uint8_t)~(CY_CAPSENSE_WD_ACTIVE_MASK |
CY_CAPSENSE_WD_DISABLE_MASK |
CY_CAPSENSE_WD_WORKING_MASK);
/* Clear sensor status */
for (snsIndex = snsNumber; snsIndex-- >0u;)
{
ptrSnsCxt->status &= (uint8_t)~(CY_CAPSENSE_SNS_TOUCH_STATUS_MASK | CY_CAPSENSE_SNS_PROX_STATUS_MASK);
ptrSnsCxt++;
}
/* Reset debounce counters */
switch (ptrWdCfg->wdType)
{
case (uint8_t)CY_CAPSENSE_WD_MATRIX_BUTTON_E:
case (uint8_t)CY_CAPSENSE_WD_BUTTON_E:
/* Each button requires one debounce counter */
(void)memset(ptrWdCfg->ptrDebounceArr, (int32_t)ptrWdCxt->onDebounce, (size_t)snsNumber);
break;
case (uint8_t)CY_CAPSENSE_WD_LINEAR_SLIDER_E:
case (uint8_t)CY_CAPSENSE_WD_RADIAL_SLIDER_E:
case (uint8_t)CY_CAPSENSE_WD_TOUCHPAD_E:
/* Each widget requires one debounce counter */
if (ptrWdCfg->senseGroup == CY_CAPSENSE_CSD_GROUP)
{
*(ptrWdCfg->ptrDebounceArr) = ptrWdCxt->onDebounce;
}
else
{
/*
* CSX Touchpad has debounce located in another place. Moreover,
* debounce counter is initialized at ID assignment, so no need
* to do it here.
*/
}
break;
case (uint8_t)CY_CAPSENSE_WD_PROXIMITY_E:
/* Proximity widgets have 2 debounce counters per sensor (for touch and prox detection) */
(void)memset(ptrWdCfg->ptrDebounceArr, (int32_t)ptrWdCxt->onDebounce, (size_t)(snsNumber << 1u));
break;
default:
break;
}
/* Reset touch numbers */
switch (ptrWdCfg->wdType)
{
case (uint8_t)CY_CAPSENSE_WD_TOUCHPAD_E:
case (uint8_t)CY_CAPSENSE_WD_MATRIX_BUTTON_E:
case (uint8_t)CY_CAPSENSE_WD_LINEAR_SLIDER_E:
case (uint8_t)CY_CAPSENSE_WD_RADIAL_SLIDER_E:
/* Clean number of touches */
ptrWdCxt->wdTouch.numPosition = CY_CAPSENSE_POSITION_NONE;
if (0u != (ptrWdCfg->posFilterConfig & CY_CAPSENSE_POSITION_FILTERS_MASK))
{
ptrWdCfg->ptrPosFilterHistory->numPosition = CY_CAPSENSE_POSITION_NONE;
}
break;
default:
break;
}
/* Reset ballistic displacement */
if (0u != (ptrWdCfg->centroidConfig & CY_CAPSENSE_CENTROID_BALLISTIC_MASK))
{
ptrWdCxt->xDelta = 0;
ptrWdCxt->yDelta = 0;
ptrWdCfg->ptrBallisticContext->oldTouchNumber = 0u;
}
/* Reset touch history */
if (0u != (ptrWdCfg->posFilterConfig & CY_CAPSENSE_POSITION_FILTERS_MASK))
{
switch (ptrWdCfg->wdType)
{
case (uint8_t)CY_CAPSENSE_WD_TOUCHPAD_E:
/* Clean position filter history */
if (ptrWdCfg->senseGroup == CY_CAPSENSE_CSX_GROUP)
{
/* Reset all history IDs to undefined state */
ptrHistory = ptrWdCfg->ptrPosFilterHistory->ptrPosition;
filterSize = (ptrWdCfg->posFilterConfig & CY_CAPSENSE_POSITION_FILTERS_SIZE_MASK) >> CY_CAPSENSE_POSITION_FILTERS_SIZE_OFFSET;
for (snsIndex = 0u; snsIndex < CY_CAPSENSE_MAX_CENTROIDS; snsIndex++)
{
ptrHistory->id = CY_CAPSENSE_CSX_TOUCHPAD_ID_UNDEFINED;
ptrHistory += filterSize;
}
}
break;
default:
break;
}
/* Init Adaptive IIR filter */
if (0u != (ptrWdCfg->posFilterConfig & CY_CAPSENSE_POSITION_AIIR_MASK))
{
Cy_CapSense_AdaptiveFilterInitialize_Lib_Call(&ptrWdCfg->aiirConfig,
ptrWdCfg->ptrPosFilterHistory->ptrPosition,
context);
}
}
}
/*******************************************************************************
* Function Name: Cy_CapSense_InitializeWidgetGestures
****************************************************************************//**
*
* Performs initialization of all gestures for the specified widget.
*
* \param widgetId
* Specifies the ID number of the widget. A macro for the widget ID can be found
* in the cycfg_capsense.h file defined as CY_CAPSENSE_<WIDGET_NAME>_WDGT_ID.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_InitializeWidgetGestures(
uint32_t widgetId,
const cy_stc_capsense_context_t * context)
{
const cy_stc_capsense_widget_config_t * ptrWdCfg = &context->ptrWdConfig[widgetId];
cy_stc_capsense_widget_context_t * ptrWdCxt = ptrWdCfg->ptrWdContext;
if (((uint8_t)CY_CAPSENSE_WD_LINEAR_SLIDER_E == ptrWdCfg->wdType) ||
((uint8_t)CY_CAPSENSE_WD_TOUCHPAD_E == ptrWdCfg->wdType))
{
if (NULL != ptrWdCfg->ptrGestureConfig)
{
if (0u != (ptrWdCfg->ptrGestureConfig->gestureEnableMask & CY_CAPSENSE_GESTURE_ALL_GESTURES_MASK))
{
ptrWdCxt->gestureDetected = 0u;
ptrWdCxt->gestureDirection = 0u;
Cy_CapSense_Gesture_ResetState(ptrWdCfg->ptrGestureContext);
}
}
}
}
/*******************************************************************************
* Function Name: Cy_CapSense_DecodeWidgetGestures
****************************************************************************//**
*
* Performs decoding of all gestures for the specified widget.
*
* This function should be called by application program only after all sensors
* are scanned and all data processing is executed using
* Cy_CapSense_ProcessAllWidgets() or Cy_CapSense_ProcessWidget() functions
* for the widget. Calling this function multiple times without a new sensor
* scan and process causes unexpected behavior.
*
* \note The function (Gesture detection functionality) requires a timestamp
* for its operation. The timestamp should be initialized and maintained
* in the application program prior to calling this function. See the
* descriptions of the Cy_CapSense_SetGestureTimestamp() and
* Cy_CapSense_IncrementGestureTimestamp() functions for details.
*
* \param widgetId
* Specifies the ID number of the widget. A macro for the widget ID can be found
* in the cycfg_capsense.h file defined as CY_CAPSENSE_<WIDGET_NAME>_WDGT_ID.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the detected Gesture mask and direction of detected gestures.
* The same information is stored in ptrWdContext->gestureDetected and
* ptrWdContext->gestureDirection registers. Corresponding macros could be found
* \ref group_capsense_macros_gesture.
* * bit[0..15] - detected gesture masks gesture
* * bit[0] - one-finger single click gesture
* * bit[1] - one-finger double click gesture
* * bit[2] - one-finger click and drag gesture
* * bit[3] - two-finger single click gesture
* * bit[4] - one-finger scroll gesture
* * bit[5] - two-finger scroll gesture
* * bit[6] - one-finger edge swipe
* * bit[7] - one-finger flick
* * bit[8] - one-finger rotate
* * bit[9] - two-finger zoom
* * bit[13] - touchdown event
* * bit[14] - liftoff event
* * bit[16..31] - gesture direction if detected
* * bit[0..1] - direction of one-finger scroll gesture
* * bit[2..3] - direction of two-finger scroll gesture
* * bit[4..5] - direction of one-finger edge swipe gesture
* * bit[6] - direction of one-finger rotate gesture
* * bit[7] - direction of two-finger zoom gesture
* * bit[8..10] - direction of one-finger flick gesture
*
* \funcusage
*
* An example of gesture decoding:
* \snippet capsense/snippet/main.c snippet_Cy_CapSense_Gesture
*
* An example of gesture status parsing:
* \snippet capsense/snippet/main.c snippet_Cy_CapSense_Gesture_Macro
*
*******************************************************************************/
uint32_t Cy_CapSense_DecodeWidgetGestures(
uint32_t widgetId,
const cy_stc_capsense_context_t * context)
{
uint32_t gestureStatus = 0u;
uint32_t posIndex;
uint32_t positionNum;
const cy_stc_capsense_widget_config_t * ptrWdCfg = &context->ptrWdConfig[widgetId];
cy_stc_capsense_widget_context_t * ptrWdCxt = ptrWdCfg->ptrWdContext;
cy_stc_capsense_gesture_position_t position[CY_CAPSENSE_MAX_CENTROIDS];
if (((uint8_t)CY_CAPSENSE_WD_LINEAR_SLIDER_E == ptrWdCfg->wdType) ||
((uint8_t)CY_CAPSENSE_WD_TOUCHPAD_E == ptrWdCfg->wdType))
{
if (NULL != ptrWdCfg->ptrGestureConfig)
{
if (0u != (ptrWdCfg->ptrGestureConfig->gestureEnableMask & CY_CAPSENSE_GESTURE_ALL_GESTURES_MASK))
{
positionNum = ptrWdCxt->wdTouch.numPosition;
if (positionNum > CY_CAPSENSE_MAX_CENTROIDS)
{
positionNum = 0u;
}
for (posIndex = 0u; posIndex < positionNum; posIndex++)
{
position[posIndex].x = ptrWdCxt->wdTouch.ptrPosition[posIndex].x;
position[posIndex].y = ptrWdCxt->wdTouch.ptrPosition[posIndex].y;
}
Cy_CapSense_Gesture_Decode(context->ptrCommonContext->timestamp, (uint32_t)ptrWdCxt->wdTouch.numPosition,
&position[0u], ptrWdCfg->ptrGestureConfig, ptrWdCfg->ptrGestureContext);
ptrWdCxt->gestureDetected = ptrWdCfg->ptrGestureContext->detected;
ptrWdCxt->gestureDirection = ptrWdCfg->ptrGestureContext->direction;
gestureStatus = (uint32_t)ptrWdCxt->gestureDetected | ((uint32_t)ptrWdCxt->gestureDirection << CY_CAPSENSE_GESTURE_DIRECTION_OFFSET);
}
}
}
return gestureStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpProcessCsxWidgetRawCounts
****************************************************************************//**
*
* Performs default processing of the raw counts of the specified CSX widget.
*
* The processing includes the following tasks:
* - Run Filters.
* - Update Baselines.
* - Update Differences.
* The same process is applied to all the sensors of the specified widget.
*
* \param ptrWdConfig
* The pointer to the widget configuration structure.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the specified widget processing operation:
* - Zero - if operation was successfully completed;
* - Non-zero - if baseline processing of any sensor of the specified widget
* failed. The result is concatenated with the index of failed sensor.
*
*******************************************************************************/
uint32_t Cy_CapSense_DpProcessCsxWidgetRawCounts(
const cy_stc_capsense_widget_config_t * ptrWdConfig,
const cy_stc_capsense_context_t * context)
{
uint32_t result = CY_CAPSENSE_STATUS_SUCCESS;
uint32_t snsIndex;
uint32_t snsHistorySize;
uint32_t freqChIndex;
uint32_t freqChNumber;
uint16_t * ptrHistoryCh;
uint16_t * ptrHistorySns;
uint16_t * ptrBslnInvCh = ptrWdConfig->ptrBslnInv;
uint16_t * ptrBslnInvSns;
uint8_t * ptrHistoryLowCh = NULL;
uint8_t * ptrHistoryLowSns = NULL;
cy_stc_capsense_sensor_context_t * ptrSnsCxtCh;
cy_stc_capsense_sensor_context_t * ptrSnsCxtSns;
snsHistorySize = (uint32_t)ptrWdConfig->rawFilterConfig & CY_CAPSENSE_RC_FILTER_SNS_HISTORY_SIZE_MASK;
freqChNumber = (CY_CAPSENSE_ENABLE == context->ptrCommonConfig->mfsEn) ? 3u : 1u;
ptrSnsCxtCh = &ptrWdConfig->ptrSnsContext[0u];
ptrHistoryCh = &ptrWdConfig->ptrRawFilterHistory[0u];
if(CY_CAPSENSE_IIR_FILTER_PERFORMANCE == (ptrWdConfig->rawFilterConfig & CY_CAPSENSE_RC_FILTER_IIR_MODE_MASK))
{
ptrHistoryLowCh = &ptrWdConfig->ptrRawFilterHistoryLow[0u];
}
for(freqChIndex = 0u; freqChIndex < freqChNumber; freqChIndex++)
{
ptrSnsCxtSns = ptrSnsCxtCh;
ptrHistorySns = ptrHistoryCh;
ptrHistoryLowSns = ptrHistoryLowCh;
ptrBslnInvSns = ptrBslnInvCh;
for (snsIndex = 0u; snsIndex < ptrWdConfig->numSns; snsIndex++)
{
Cy_CapSense_FtRunEnabledFiltersInternal_Call(ptrWdConfig,
ptrSnsCxtSns,
ptrHistorySns,
ptrHistoryLowSns,
context);
result |= Cy_CapSense_FtUpdateBaseline(ptrWdConfig->ptrWdContext, ptrSnsCxtSns, ptrBslnInvSns, context);
Cy_CapSense_DpUpdateDifferences(ptrWdConfig->ptrWdContext, ptrSnsCxtSns);
ptrSnsCxtSns++;
ptrBslnInvSns++;
ptrHistorySns += snsHistorySize;
if(NULL != ptrHistoryLowSns)
{
ptrHistoryLowSns++;
}
}
ptrSnsCxtCh += context->ptrCommonConfig->numSns;
ptrBslnInvCh += context->ptrCommonConfig->numSns;
ptrHistoryCh += context->ptrCommonConfig->numSns * snsHistorySize;
if(NULL != ptrHistoryLowCh)
{
ptrHistoryLowCh += context->ptrCommonConfig->numSns;
}
}
if(CY_CAPSENSE_ENABLE == context->ptrCommonConfig->mfsEn)
{
ptrSnsCxtSns = ptrWdConfig->ptrSnsContext;
for (snsIndex = ptrWdConfig->numSns; snsIndex-- > 0u;)
{
Cy_CapSense_RunMfsFiltering(ptrSnsCxtSns, context);
ptrSnsCxtSns++;
}
}
return result;
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpProcessCsxWidgetStatus
****************************************************************************//**
*
* Updates the status of the CSX widget in the Data Structure.
*
* This function determines the type of widget and runs the appropriate function
* that implements the status update algorithm for this type of widget.
*
* When the widget-specific processing completes this function updates the
* sensor and widget status registers in the data structure.
*
* \param ptrWdConfig
* The pointer to the widget configuration structure.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_DpProcessCsxWidgetStatus(
const cy_stc_capsense_widget_config_t * ptrWdConfig,
cy_stc_capsense_context_t * context)
{
switch (ptrWdConfig->wdType)
{
case (uint8_t)CY_CAPSENSE_WD_BUTTON_E:
case (uint8_t)CY_CAPSENSE_WD_MATRIX_BUTTON_E:
Cy_CapSense_DpProcessButton_Call(ptrWdConfig, context);
break;
case (uint8_t)CY_CAPSENSE_WD_TOUCHPAD_E:
Cy_CapSense_DpProcessCsxTouchpad_Call(ptrWdConfig, context);
break;
default:
CY_ASSERT(0 != 0);
break;
}
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpProcessCsxSensorRawCountsExt
****************************************************************************//**
*
* Performs customized processing of the CSX sensor raw counts.
*
* If all bits are set at once, the default processing order will take place.
* For a custom order, this function can be called multiple times and execute
* one task at a time.
*
* \param ptrWdConfig
* The pointer to the widget configuration structure.
*
* \param ptrSnsContext
* The pointer to the sensor context structure.
*
* \param ptrSnsRawHistory
* The pointer to the filter history.
*
* \param ptrSnsRawHistoryLow
* The pointer to the extended filter history.
*
* \param mode
* The bit-mask with the data processing tasks to be executed.
* The mode parameters can take the following values:
* - CY_CAPSENSE_PROCESS_FILTER (0x01) Run Firmware Filter
* - CY_CAPSENSE_PROCESS_BASELINE (0x02) Update Baselines
* - CY_CAPSENSE_PROCESS_DIFFCOUNTS (0x04) Update Difference Counts
* - CY_CAPSENSE_PROCESS_ALL Execute all tasks
*
* \param ptrSnsBslnInv
* The pointer to the sensor baseline inversion used for BIST if enabled.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the specified sensor processing operation:
* - CY_CAPSENSE_STATUS_SUCCESS if operation was successfully completed;
* - Non-zero - if baseline processing of any
* sensor of the specified widget failed. The result is concatenated with the index
* of failed sensor.
*
*******************************************************************************/
uint32_t Cy_CapSense_DpProcessCsxSensorRawCountsExt(
const cy_stc_capsense_widget_config_t * ptrWdConfig,
cy_stc_capsense_sensor_context_t * ptrSnsContext,
uint16_t * ptrSnsRawHistory,
uint8_t * ptrSnsRawHistoryLow,
uint32_t mode,
uint16_t * ptrSnsBslnInv,
const cy_stc_capsense_context_t * context)
{
uint32_t result = CY_CAPSENSE_STATUS_SUCCESS;
cy_stc_capsense_widget_context_t * ptrWdCxt = ptrWdConfig->ptrWdContext;
if (0u != (mode & CY_CAPSENSE_PROCESS_FILTER))
{
Cy_CapSense_FtRunEnabledFiltersInternal_Call(ptrWdConfig,
ptrSnsContext,
ptrSnsRawHistory,
ptrSnsRawHistoryLow,
context);
}
if (0u != (mode & CY_CAPSENSE_PROCESS_BASELINE))
{
result = Cy_CapSense_FtUpdateBaseline(ptrWdCxt, ptrSnsContext, ptrSnsBslnInv, context);
}
if (0u != (mode & CY_CAPSENSE_PROCESS_DIFFCOUNTS))
{
Cy_CapSense_DpUpdateDifferences(ptrWdCxt, ptrSnsContext);
}
return result;
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpProcessCsdWidgetRawCounts
****************************************************************************//**
*
* Performs default processing of the raw counts of the specified CSD widget.
*
* The processing includes the following tasks:
* - Run Filters.
* - Update Baselines.
* - Update Differences.
* The same process is applied to all the sensors of the specified widget.
*
* \param ptrWdConfig
* The pointer to the widget configuration structure.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the specified widget processing operation:
* - Zero - if operation was successfully completed.
* - Non-zero - if baseline processing of any sensor of the specified widget
* failed. The result is concatenated with the index of failed sensor.
*
*******************************************************************************/
uint32_t Cy_CapSense_DpProcessCsdWidgetRawCounts(
const cy_stc_capsense_widget_config_t * ptrWdConfig,
const cy_stc_capsense_context_t * context)
{
uint32_t result = CY_CAPSENSE_STATUS_SUCCESS;
uint32_t snsIndex;
uint32_t snsHistorySize;
uint32_t freqChIndex;
uint32_t freqChNumber;
uint16_t * ptrHistoryCh;
uint16_t * ptrHistorySns;
uint16_t * ptrBslnInvCh = ptrWdConfig->ptrBslnInv;
uint16_t * ptrBslnInvSns;
uint8_t * ptrHistoryLowCh = NULL;
uint8_t * ptrHistoryLowSns = NULL;
cy_stc_capsense_sensor_context_t * ptrSnsCxtCh;
cy_stc_capsense_sensor_context_t * ptrSnsCxtSns;
#if (CY_CAPSENSE_PLATFORM_BLOCK_CSDV2)
cy_stc_capsense_smartsense_csd_noise_envelope_t * ptrNEHistory = ptrWdConfig->ptrNoiseEnvelope;
#endif
snsHistorySize = (uint32_t)ptrWdConfig->rawFilterConfig & CY_CAPSENSE_RC_FILTER_SNS_HISTORY_SIZE_MASK;
freqChNumber = (CY_CAPSENSE_ENABLE == context->ptrCommonConfig->mfsEn) ? 3u : 1u;
ptrSnsCxtCh = &ptrWdConfig->ptrSnsContext[0u];
ptrHistoryCh = &ptrWdConfig->ptrRawFilterHistory[0u];
if(CY_CAPSENSE_IIR_FILTER_PERFORMANCE == (ptrWdConfig->rawFilterConfig & CY_CAPSENSE_RC_FILTER_IIR_MODE_MASK))
{
ptrHistoryLowCh = &ptrWdConfig->ptrRawFilterHistoryLow[0u];
}
for(freqChIndex = 0u; freqChIndex < freqChNumber; freqChIndex++)
{
ptrSnsCxtSns = ptrSnsCxtCh;
ptrHistorySns = ptrHistoryCh;
ptrBslnInvSns = ptrBslnInvCh;
ptrHistoryLowSns = ptrHistoryLowCh;
for (snsIndex = 0u; snsIndex < ptrWdConfig->numSns; snsIndex++)
{
Cy_CapSense_FtRunEnabledFiltersInternal_Call(ptrWdConfig,
ptrSnsCxtSns,
ptrHistorySns,
ptrHistoryLowSns,
context);
#if (CY_CAPSENSE_PLATFORM_BLOCK_CSDV2)
/* Run auto-tuning activities */
if (CY_CAPSENSE_CSD_SS_HWTH_EN == context->ptrCommonConfig->csdAutotuneEn)
{
Cy_CapSense_RunNoiseEnvelope_Lib_Call(ptrSnsCxtSns->raw,
ptrWdConfig->ptrWdContext->sigPFC,
ptrNEHistory,
context);
Cy_CapSense_DpUpdateThresholds_Call(ptrWdConfig->ptrWdContext, ptrNEHistory, snsIndex, context);
if ((uint8_t)CY_CAPSENSE_WD_PROXIMITY_E == ptrWdConfig->wdType)
{
ptrWdConfig->ptrWdContext->proxTh = (uint16_t)(((uint32_t)ptrWdConfig->ptrWdContext->fingerTh *
context->ptrCommonConfig->proxTouchCoeff) / CY_CAPSENSE_PERCENTAGE_100);
}
ptrNEHistory++;
}
#endif
result |= Cy_CapSense_FtUpdateBaseline(ptrWdConfig->ptrWdContext, ptrSnsCxtSns, ptrBslnInvSns, context);
Cy_CapSense_DpUpdateDifferences(ptrWdConfig->ptrWdContext, ptrSnsCxtSns);
ptrSnsCxtSns++;
ptrBslnInvSns++;
ptrHistorySns += snsHistorySize;
if(NULL != ptrHistoryLowSns)
{
ptrHistoryLowSns++;
}
}
ptrSnsCxtCh += context->ptrCommonConfig->numSns;
ptrBslnInvCh += context->ptrCommonConfig->numSns;
ptrHistoryCh += context->ptrCommonConfig->numSns * snsHistorySize;
if(NULL != ptrHistoryLowCh)
{
ptrHistoryLowCh += context->ptrCommonConfig->numSns;
}
}
if(CY_CAPSENSE_ENABLE == context->ptrCommonConfig->mfsEn)
{
ptrSnsCxtSns = ptrWdConfig->ptrSnsContext;
for (snsIndex = ptrWdConfig->numSns; snsIndex-- > 0u;)
{
Cy_CapSense_RunMfsFiltering(ptrSnsCxtSns, context);
ptrSnsCxtSns++;
}
}
return result;
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpProcessCsdSensorRawCountsExt
****************************************************************************//**
*
* Performs customized processing of the CSX sensor raw counts.
*
* If all bits are set at once, the default processing order will take place.
* For a custom order, this function can be called multiple times and execute
* one task at a time.
*
* \param ptrWdConfig
* The pointer to the widget configuration structure.
*
* \param ptrSnsContext
* The pointer to the sensor context structure.
*
* \param ptrSnsRawHistory
* The pointer to the filter history.
*
* \param ptrSnsRawHistoryLow
* The pointer to the extended filter history.
*
* \param mode
* The bit-mask with the data processing tasks to be executed.
* The mode parameters can take the following values:
* - CY_CAPSENSE_PROCESS_FILTER (0x01) Run Firmware Filter
* - CY_CAPSENSE_PROCESS_BASELINE (0x02) Update Baselines
* - CY_CAPSENSE_PROCESS_DIFFCOUNTS (0x04) Update Difference Counts
* - CY_CAPSENSE_PROCESS_CALC_NOISE (0x08) Calculate Noise (only if FW Tuning is enabled)
* - CY_CAPSENSE_PROCESS_THRESHOLDS (0x10) Update Thresholds (only if FW Tuning is enabled)
* - CY_CAPSENSE_PROCESS_ALL Execute all tasks
*
* \param ptrBslnInvSns
* The pointer to the sensor baseline inversion used for BIST if enabled.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the specified sensor processing operation:
* - CY_CAPSENSE_STATUS_SUCCESS if operation was successfully completed.
* - CY_CAPSENSE_STATUS_BAD_DATA if baseline processing of any sensor of the specified widget
* failed.
*
*******************************************************************************/
uint32_t Cy_CapSense_DpProcessCsdSensorRawCountsExt(
const cy_stc_capsense_widget_config_t * ptrWdConfig,
cy_stc_capsense_sensor_context_t * ptrSnsContext,
uint16_t * ptrSnsRawHistory,
uint8_t * ptrSnsRawHistoryLow,
uint32_t mode,
uint16_t * ptrBslnInvSns,
const cy_stc_capsense_context_t * context)
{
uint32_t result = CY_CAPSENSE_STATUS_SUCCESS;
cy_stc_capsense_widget_context_t * ptrWdCxt = ptrWdConfig->ptrWdContext;
if (0u != (mode & CY_CAPSENSE_PROCESS_FILTER))
{
Cy_CapSense_FtRunEnabledFiltersInternal_Call(ptrWdConfig, ptrSnsContext,
ptrSnsRawHistory, ptrSnsRawHistoryLow,
context);
}
if (0u != (mode & CY_CAPSENSE_PROCESS_BASELINE))
{
result = Cy_CapSense_FtUpdateBaseline(ptrWdCxt, ptrSnsContext, ptrBslnInvSns, context);
}
if (0u != (mode & CY_CAPSENSE_PROCESS_DIFFCOUNTS))
{
Cy_CapSense_DpUpdateDifferences(ptrWdCxt, ptrSnsContext);
}
return result;
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpProcessCsdWidgetStatus
****************************************************************************//**
*
* Updates the status of the CSD widget in the Data Structure.
*
* This function determines the type of widget and runs the appropriate function
* that implements the status update algorithm for this type of widget.
*
* When the widget-specific processing completes this function updates the
* sensor and widget status registers in the data structure.
*
* \param ptrWdConfig
* The pointer to the widget configuration structure.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_DpProcessCsdWidgetStatus(
const cy_stc_capsense_widget_config_t * ptrWdConfig,
cy_stc_capsense_context_t * context)
{
switch (ptrWdConfig->wdType)
{
case (uint8_t)CY_CAPSENSE_WD_BUTTON_E:
Cy_CapSense_DpProcessButton_Call(ptrWdConfig, context);
break;
case (uint8_t)CY_CAPSENSE_WD_LINEAR_SLIDER_E:
case (uint8_t)CY_CAPSENSE_WD_RADIAL_SLIDER_E:
Cy_CapSense_DpProcessSlider_Call(ptrWdConfig, context);
break;
case (uint8_t)CY_CAPSENSE_WD_MATRIX_BUTTON_E:
Cy_CapSense_DpProcessCsdMatrix_Call(ptrWdConfig, context);
break;
case (uint8_t)CY_CAPSENSE_WD_TOUCHPAD_E:
Cy_CapSense_DpProcessCsdTouchpad_Call(ptrWdConfig, context);
break;
case (uint8_t)CY_CAPSENSE_WD_PROXIMITY_E:
Cy_CapSense_DpProcessProximity_Call(ptrWdConfig, context);
break;
default:
break;
}
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpUpdateThresholds
****************************************************************************//**
*
* Updates noise and finger thresholds for a specified widget.
*
* This algorithm is a part of SmartSense feature.
*
* \param ptrWdContext
* The pointer to the widget context structure.
*
* \param ptrNoiseEnvelope
* The pointer to the noise-envelope history structure.
*
* \param startFlag
* The flag indicates when a new widget is processed.
*
*******************************************************************************/
void Cy_CapSense_DpUpdateThresholds(
cy_stc_capsense_widget_context_t * ptrWdContext,
const cy_stc_capsense_smartsense_csd_noise_envelope_t * ptrNoiseEnvelope,
uint32_t startFlag)
{
cy_stc_capsense_smartsense_update_thresholds_t thresholds;
/* Calculate Thresholds */
thresholds.fingerTh = ptrWdContext->fingerTh;
Cy_CapSense_UpdateThresholds_Lib(ptrNoiseEnvelope, &thresholds, ptrWdContext->sigPFC, startFlag);
/* Update CapSense context */
ptrWdContext->fingerTh = thresholds.fingerTh;
ptrWdContext->noiseTh = thresholds.noiseTh;
ptrWdContext->nNoiseTh = thresholds.nNoiseTh;
ptrWdContext->hysteresis = thresholds.hysteresis;
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpUpdateDifferences
****************************************************************************//**
*
* Calculates new difference values.
*
* This function calculates the difference between the baseline and raw counts.
* If the difference is positive (raw > baseline), and higher than the widget
* noise threshold, it is saved into the data structure for further processing.
* Otherwise the difference is set to zero. The final difference value is saved
* with the subtracted noise threshold value.
*
* \param ptrWdContext
* The pointer to the widget context structure.
*
* \param ptrSnsContext
* The pointer to the sensor context structure.
*
*******************************************************************************/
void Cy_CapSense_DpUpdateDifferences(
const cy_stc_capsense_widget_context_t * ptrWdContext,
cy_stc_capsense_sensor_context_t * ptrSnsContext)
{
ptrSnsContext->diff = 0u;
if (ptrSnsContext->raw > (ptrSnsContext->bsln + ptrWdContext->noiseTh))
{
ptrSnsContext->diff = ptrSnsContext->raw - ptrSnsContext->bsln;
}
}
/*******************************************************************************
* Function Name: Cy_CapSense_DpProcessButton
****************************************************************************//**
*
* Processes the status of the Button widget.
*
* This function processes the status of the CSD/CSX Button widget and
* CSX Matrix Button widget. It applies the hysteresis and debounce algorithm
* to each sensor difference value. This function is expected to be called
* after each new widget scan. If it is called multiple times for the same
* scan data, the debounce algorithm will not work properly.
*
* \param ptrWdConfig
* The pointer to the widget configuration structure.
*
* \param context
* The pointer to the CapSense context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_DpProcessButton(
const cy_stc_capsense_widget_config_t * ptrWdConfig,
const cy_stc_capsense_context_t * context)
{
uint32_t snsIndex;
uint32_t activeCount = 0u;
uint32_t startIndex = 0u;
uint32_t touchTh;
(void) context;
uint8_t * ptrDebounceCnt = ptrWdConfig->ptrDebounceArr;
cy_stc_capsense_sensor_context_t * ptrSnsCxt = ptrWdConfig->ptrSnsContext;
cy_stc_capsense_widget_context_t * ptrWdCxt = ptrWdConfig->ptrWdContext;
ptrWdCxt->status &= (uint8_t)~CY_CAPSENSE_WD_ACTIVE_MASK;
/* Go through all widget's sensors */
for (snsIndex = 0u; snsIndex < ptrWdConfig->numSns; snsIndex++)
{
/* Calculate touch threshold based on current sensor state */
touchTh = (0u == ptrSnsCxt->status) ?
((uint32_t)ptrWdCxt->fingerTh + ptrWdCxt->hysteresis) :
((uint32_t)ptrWdCxt->fingerTh - ptrWdCxt->hysteresis);
if (0u < (*ptrDebounceCnt))
{
/* Decrement debounce counter */
(*ptrDebounceCnt)--;
}
/* No touch */
if (ptrSnsCxt->diff <= touchTh)
{
/* Reset debounce counter */
*ptrDebounceCnt = ptrWdCxt->onDebounce;
ptrSnsCxt->status = 0u;
}
/* New touch or touch still exists */
if (0u == (*ptrDebounceCnt))
{
ptrSnsCxt->status = CY_CAPSENSE_SNS_TOUCH_STATUS_MASK;
activeCount++;
startIndex = snsIndex;
}
/* Update widget status */
if (0u != ptrSnsCxt->status)
{
ptrWdCxt->status |= (uint8_t)CY_CAPSENSE_WD_ACTIVE_MASK;
}
ptrSnsCxt++;
ptrDebounceCnt++;
}
/* Update position struct */
if (((uint8_t)CY_CAPSENSE_WD_MATRIX_BUTTON_E == ptrWdConfig->wdType) &&
(CY_CAPSENSE_CSX_GROUP == ptrWdConfig->senseGroup))
{
ptrWdCxt->wdTouch.numPosition = (uint8_t)activeCount;
ptrWdCxt->wdTouch.ptrPosition->id = (uint16_t)startIndex;
ptrWdCxt->wdTouch.ptrPosition->x = (uint16_t)(startIndex / ptrWdConfig->numRows);
ptrWdCxt->wdTouch.ptrPosition->y = (uint16_t)(startIndex % ptrWdConfig->numRows);
}