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cy_capsense_sensing_v2.c
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/***************************************************************************//**
* \file cy_capsense_sensing_v2.c
* \version 6.10.0
*
* \brief
* This file contains the source of functions common for different sensing
* methods.
*
********************************************************************************
* \copyright
* Copyright 2018-2025, Cypress Semiconductor Corporation (an Infineon company)
* or an affiliate of 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 <stdlib.h>
#include <stddef.h>
#include "cy_gpio.h"
#include "cy_sysclk.h"
#include "cycfg_capsense_defines.h"
#include "cy_capsense_common.h"
#include "cy_capsense_structure.h"
#include "cy_capsense_sensing_v2.h"
#include "cy_capsense_sensing.h"
#include "cy_capsense_csx_v2.h"
#include "cy_capsense_csd_v2.h"
#include "cy_capsense_lib.h"
#include "cy_capsense_selftest.h"
#if (CY_CAPSENSE_PLATFORM_BLOCK_FOURTH_GEN)
#include "cy_csd.h"
#endif
#if (defined(CY_IP_MXCSDV2) || defined(CY_IP_M0S8CSDV2))
/*******************************************************************************
* Constants
*******************************************************************************/
#define CY_CAPSENSE_AUTOTUNE_CALIBRATION_RESOLUTION (12u)
#define CY_CAPSENSE_AUTOTUNE_CALIBRATION_FREQ_KHZ (1500u)
#define CY_CAPSENSE_CSD_SNS_FREQ_KHZ_MAX (6000u)
#define CY_CAPSENSE_CSD_AUTOTUNE_CAL_UNITS (1000u)
#define CY_CAPSENSE_AUTOTUNE_CP_MAX (69000Lu)
#define CY_CAPSENSE_EXT_CAP_DISCHARGE_TIME (1u)
#define CY_CAPSENSE_VREF_GAIN_MAX (32u)
#define CY_CAPSENSE_VREF_VDDA_MIN_DIFF (600u)
#if (CY_CAPSENSE_PSOC4_FOURTH_GEN)
#define CY_CAPSENSE_VREF_SRSS_MV (1200u)
#else
#define CY_CAPSENSE_VREF_SRSS_MV (800u)
#endif
#define CY_CAPSENSE_VREF_PASS_MV (1200u)
#if (CY_CAPSENSE_PSOC4_FOURTH_GEN)
#define CY_CAPSENSE_VREF_RANGE_0 (4700u)
#define CY_CAPSENSE_VREF_RANGE_1 (3200u)
#define CY_CAPSENSE_VREF_RANGE_2 (2600u)
#define CY_CAPSENSE_VREF_VALUE_0 (2743u)
#define CY_CAPSENSE_VREF_VALUE_1 (2021u)
#define CY_CAPSENSE_VREF_VALUE_2 (1477u)
#define CY_CAPSENSE_VREF_VALUE_MIN (1200u)
#else
#define CY_CAPSENSE_VREF_RANGE_0 (2750u)
#define CY_CAPSENSE_VREF_RANGE_1 (2200u)
#define CY_CAPSENSE_VREF_VALUE_0 (2133u)
#define CY_CAPSENSE_VREF_VALUE_1 (1600u)
#define CY_CAPSENSE_VREF_VALUE_MIN_SRSS (1164u)
#define CY_CAPSENSE_VREF_VALUE_MIN_PASS (1200u)
#endif
#if (CY_CAPSENSE_DISABLE == CY_CAPSENSE_USE_CAPTURE)
const cy_stc_csd_config_t cy_capsense_csdCfg = CY_CAPSENSE_CSD_CONFIG_DEFAULT;
#endif
/*******************************************************************************
* Function Name: Cy_CapSense_SetBusyFlags
****************************************************************************//**
*
* Sets BUSY flags of the cy_capsense_context.status register specified
* by the flags parameter.
*
* This is an internal function. Do not call this function directly from
* the application program.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_SetBusyFlags(cy_stc_capsense_context_t * context)
{
context->ptrCommonContext->status |= CY_CAPSENSE_BUSY;
}
/*******************************************************************************
* Function Name: Cy_CapSense_ClrBusyFlags
****************************************************************************//**
*
* Clears BUSY flags of the cy_capsense_context.status register specified
* by the flags parameter.
*
* This is an internal function. Do not call this function directly from
* the application program.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
void Cy_CapSense_ClrBusyFlags(cy_stc_capsense_context_t * context)
{
/* Clear busy flag */
context->ptrCommonContext->status &= (uint32_t)(~((uint32_t)CY_CAPSENSE_BUSY));
context->ptrActiveScanSns->scanScope = CY_CAPSENSE_SCAN_SCOPE_SNGL_SNS;
/* Mark completion of scan cycle */
context->ptrCommonContext->scanCounter++;
if (NULL != context->ptrInternalContext->ptrEOSCallback)
{
context->ptrInternalContext->ptrEOSCallback(context->ptrActiveScanSns);
}
}
/*******************************************************************************
* Function Name: Cy_CapSense_SetupWidget
****************************************************************************//**
*
* Performs the initialization required to scan the specified widget.
*
* \deprecated This function is deprecated, it will become obsolete in upcoming
* major version of middleware. It is kept for backward compatibility only.
* The Cy_CapSense_ScanWidget() function should be used instead.
*
* This function prepares the middleware to scan all the sensors in the specified
* widget by executing the following tasks:
* 1. Configure the CSD HW block if it is not configured to perform the
* sensing method used by the specified widget. This happens only if the
* CSD and CSX methods are used in a user's project.
* 2. Initialize the CSD HW block with specific sensing configuration (e.g.
* sensor clock, scan resolution) used by the widget.
* 3. Disconnect all previously connected electrodes.
*
* This function does not start sensor scanning. The Cy_CapSense_Scan()
* function must be called to start the scan sensors in the widget. If this
* function is called more than once, it does not break the middleware operation,
* but only the last initialized widget is in effect.
*
* The status of a sensor scan must be checked using the Cy_CapSense_IsBusy()
* function prior to starting a next scan or setting up another widget.
*
* \note
* This function is available only for the fourth-generation CAPSENSE™.
*
* \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 status of the widget setting up operation:
* - CY_CAPSENSE_STATUS_SUCCESS - The operation is successfully completed.
* - CY_CAPSENSE_STATUS_BAD_PARAM - The widget is invalid or if the specified widget is
* disabled.
* - CY_CAPSENSE_STATUS_INVALID_STATE - The previous scanning is not completed and
* the CSD HW block is busy.
* any other spurious error occurred.
*
**********************************************************************************/
cy_capsense_status_t Cy_CapSense_SetupWidget(
uint32_t widgetId,
cy_stc_capsense_context_t * context)
{
cy_capsense_status_t widgetStatus;
if (CY_CAPSENSE_BUSY == Cy_CapSense_IsBusy(context))
{
/* Previous widget is being scanned. Return error. */
widgetStatus = CY_CAPSENSE_STATUS_INVALID_STATE;
}
/*
* Check whether widget id is valid, specified widget is enabled and widget did not
* detect any fault conditions. If all conditions are met,
* set widgetStatus as good, if not, set widgetStatus as bad.
*/
else if ((context->ptrCommonConfig->numWd > widgetId) &&
(0u != Cy_CapSense_IsWidgetEnabled(widgetId, context)))
{
/* Check widget sensing method and call corresponding setup function */
switch (context->ptrWdConfig[widgetId].senseMethod)
{
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN)
case CY_CAPSENSE_CSD_GROUP:
Cy_CapSense_CSDSetupWidget(widgetId, context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN) */
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN)
case CY_CAPSENSE_CSX_GROUP:
Cy_CapSense_CSXSetupWidget(widgetId, context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN) */
default:
/* No other sensing methods */
break;
}
widgetStatus = CY_CAPSENSE_STATUS_SUCCESS;
}
else
{
widgetStatus = CY_CAPSENSE_STATUS_BAD_PARAM;
}
return widgetStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_Scan
****************************************************************************//**
*
* Initiates scanning of all the sensors in the widget initialized by
* Cy_CapSense_SetupWidget(), if no scan is in progress.
*
* \deprecated This function is deprecated, it will become obsolete in upcoming
* major version of middleware. It is kept for backward compatibility only.
* The Cy_CapSense_ScanWidget() function should be used instead without additional
* call of Cy_CapSense_SetupWidget().
*
* Prior to calling this function to scan sensors, the widget required
* to be scanned must be initialized using Cy_CapSense_SetupWidget() function.
*
* This function initiates scan only for the first sensor in the widget and then
* exits the function. The scan for the remaining sensors in the widget is
* initiated in the interrupt service routine (part of middleware) triggered
* at the end of each scan completion. Hence, check the status of the current scan
* using the Cy_CapSense_IsBusy() function and wait until all scans
* in the current widget are finished prior to starting the next scan or
* initializing another widget.
*
* \note
* This function is available only for the fourth-generation CAPSENSE™.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the scan initiation operation:
* - CY_CAPSENSE_STATUS_SUCCESS - Scanning is successfully started.
* - CY_CAPSENSE_STATUS_INVALID_STATE - The previous scan is not completed and
* the CSD HW block is busy.
* - CY_CAPSENSE_STATUS_BAD_CONFIG - The function does not suppose to be
* called with the current CAPSENSE™
* configuration.
*
********************************************************************************/
cy_capsense_status_t Cy_CapSense_Scan(cy_stc_capsense_context_t * context)
{
cy_capsense_status_t scanStatus = CY_CAPSENSE_STATUS_SUCCESS;
if (CY_CAPSENSE_BUSY == Cy_CapSense_IsBusy(context))
{
/* Previous widget is being scanned. Return error. */
scanStatus = CY_CAPSENSE_STATUS_INVALID_STATE;
}
else
{
/* Check widget sensing method and call appropriate functions */
switch (context->ptrActiveScanSns->ptrWdConfig->senseMethod)
{
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN)
case CY_CAPSENSE_CSD_GROUP:
Cy_CapSense_CSDScan(context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN) */
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN)
case CY_CAPSENSE_CSX_GROUP:
Cy_CapSense_CSXScan(context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN) */
default:
scanStatus = CY_CAPSENSE_STATUS_BAD_CONFIG;
break;
}
}
return scanStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_ScanWidget_V2
****************************************************************************//**
*
* Configures the specified widget and initiates scanning of all the sensors
* in the widget if no scan is in progress.
*
* This function initiates scan only for the first sensor in the widget and then
* exits the function. The scan for the remaining sensors in the widget is
* initiated in the interrupt service routine (part of middleware) triggered
* at the end of each scan completion. Hence, status of the current scan
* should be checked using the Cy_CapSense_IsBusy() and wait until all scans
* in the current widget are finished prior to starting the next scan or
* initializing another widget.
*
* \note
* This function is available only for the fourth-generation CAPSENSE™.
*
* \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 status of the scan initiation operation:
* - CY_CAPSENSE_STATUS_SUCCESS - Scanning is successfully started.
* - CY_CAPSENSE_STATUS_INVALID_STATE - The previous scan is not completed and
* the CSD HW block is busy.
* - CY_CAPSENSE_STATUS_BAD_PARAM - The widget is invalid or if the specified widget is
* disabled.
* - CY_CAPSENSE_STATUS_BAD_CONFIG - The function does not suppose to be
* called with the current CAPSENSE™
* configuration.
*
********************************************************************************/
cy_capsense_status_t Cy_CapSense_ScanWidget_V2(uint32_t widgetId, cy_stc_capsense_context_t * context)
{
cy_stc_capsense_active_scan_sns_t * ptrActive = context->ptrActiveScanSns;
cy_capsense_status_t scanStatus = CY_CAPSENSE_STATUS_SUCCESS;
if (CY_CAPSENSE_BUSY == Cy_CapSense_IsBusy(context))
{
/* Previous widget is being scanned. Return error. */
scanStatus = CY_CAPSENSE_STATUS_INVALID_STATE;
}
else
{
if ((context->ptrActiveScanSns->widgetIndex != (uint8_t)widgetId) ||
(ptrActive->connectedSnsState != CY_CAPSENSE_SNS_DISCONNECTED) ||
(ptrActive->currentSenseMethod != context->ptrWdConfig[widgetId].senseMethod))
{
scanStatus = Cy_CapSense_SetupWidget(widgetId, context);
}
if (CY_CAPSENSE_STATUS_SUCCESS == scanStatus)
{
scanStatus = Cy_CapSense_Scan(context);
}
}
return scanStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_SetupWidgetExt
****************************************************************************//**
*
* Performs extended initialization for the specified widget and also performs
* initialization required for a specific sensor in the widget.
*
* This function requires using the Cy_CapSense_ScanExt() function to
* initiate a scan.
*
* This function does the same as Cy_CapSense_SetupWidget() and also
* does the following tasks:
* 1. Connects the specified sensor of the widget.
* 2. Configures the CSD HW block to perform a scan of the specified sensor.
*
* Once this function is called to initialize a widget and a sensor, the
* Cy_CapSense_ScanExt() function is called to scan the sensor.
*
* This function is called when no scanning is in progress. I.e.
* Cy_CapSense_IsBusy() returns a non-busy status.
*
* Calling this function directly from the application program is not
* recommended. This function is used to implement only the user's specific
* use cases (for faster execution time or pipeline scanning, for example).
*
* \note
* This function is available only for the fourth-generation CAPSENSE™.
*
* \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 sensorId
* Specifies the ID number of the sensor within the widget. A macro for the
* sensor ID within a specified widget can be found in the cycfg_capsense.h
* file defined as CY_CAPSENSE_<WIDGET_NAME>_SNS<SENSOR_NUMBER>_ID.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the widget setting up operation:
* - CY_CAPSENSE_STATUS_SUCCESS - The operation is successfully completed.
* - CY_CAPSENSE_STATUS_BAD_PARAM - The widget is invalid or if the specified widget is
* disabled.
* - CY_CAPSENSE_STATUS_INVALID_STATE - The previous scanning is not completed and
* the CSD HW block is busy.
*
**********************************************************************************/
cy_capsense_status_t Cy_CapSense_SetupWidgetExt(
uint32_t widgetId,
uint32_t sensorId,
cy_stc_capsense_context_t * context)
{
cy_capsense_status_t widgetStatus = CY_CAPSENSE_STATUS_BAD_PARAM;
if (CY_CAPSENSE_BUSY == Cy_CapSense_IsBusy(context))
{
/* Previous widget is being scanned. Return error. */
widgetStatus = CY_CAPSENSE_STATUS_INVALID_STATE;
}
/*
* Check whether widget id is valid, specified widget is enabled and widget did not
* detect any fault conditions. If all conditions are met,
* set widgetStatus as good, if not, set widgetStatus as bad.
*/
else if ((context->ptrCommonConfig->numWd > widgetId) &&
(0u != Cy_CapSense_IsWidgetEnabled(widgetId, context)))
{
if (context->ptrWdConfig[widgetId].numSns > sensorId)
{
/* Check widget sensing method and call corresponding setup function */
switch (context->ptrWdConfig[widgetId].senseMethod)
{
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN)
case CY_CAPSENSE_CSD_GROUP:
Cy_CapSense_CSDSetupWidgetExt(widgetId, sensorId, context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN) */
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN)
case CY_CAPSENSE_CSX_GROUP:
Cy_CapSense_CSXSetupWidgetExt(widgetId, sensorId, context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN) */
default:
/* No other sensing methods */
break;
}
widgetStatus = CY_CAPSENSE_STATUS_SUCCESS;
}
}
else
{
/* Do nothing */
}
return widgetStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_ScanExt
****************************************************************************//**
*
* Starts a conversion on the pre-configured sensor. This function requires
* using the Cy_CapSense_SetupWidgetExt() function to set up the a
* widget.
*
* This function performs single scanning of one sensor in the widget configured
* by the Cy_CapSense_SetupWidgetExt() function.
*
* Calling this function directly from the application program is not
* recommended. This function is used to implement only the user's specific
* use cases (for faster execution time or pipeline scanning, for example).
* This function is called when no scanning is in progress. I.e.
* Cy_CapSense_IsBusy() returns a non-busy status.
*
* The sensor must be pre-configured by using the
* Cy_CapSense_SetupWidgetExt() prior to calling this function.
* The sensor remains ready for the next scan if a previous scan was triggered
* by using the Cy_CapSense_ScanExt() function. In this case, calling
* Cy_CapSense_SetupWidgetExt() is not required every time before the
* Cy_CapSense_ScanExt() function. If a previous scan was triggered in
* any other way - Cy_CapSense_Scan(), Cy_CapSense_ScanAllWidgets(), or
* Cy_CapSense_RunTuner() - (see the Cy_CapSense_RunTuner() function
* description for more details), the sensor must be pre-configured again by
* using the Cy_CapSense_SetupWidgetExt() prior to calling the
* Cy_CapSense_ScanExt() function.
*
* \note
* This function is available only for the fourth-generation CAPSENSE™.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the operation:
* - CY_CAPSENSE_STATUS_SUCCESS - Scanning is successfully started.
* - CY_CAPSENSE_STATUS_BAD_CONFIG - The function does not suppose to be
* called with the current CAPSENSE™
* configuration.
*******************************************************************************/
cy_capsense_status_t Cy_CapSense_ScanExt(cy_stc_capsense_context_t * context)
{
cy_capsense_status_t scanStatus = CY_CAPSENSE_STATUS_SUCCESS;
if (CY_CAPSENSE_BUSY == Cy_CapSense_IsBusy(context))
{
/* Previous widget is being scanned. Return error. */
scanStatus = CY_CAPSENSE_STATUS_INVALID_STATE;
}
else
{
/* Check widget sensing method and call appropriate functions */
switch (context->ptrActiveScanSns->ptrWdConfig->senseMethod)
{
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN)
case CY_CAPSENSE_CSD_GROUP:
Cy_CapSense_CSDScanExt(context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN) */
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN)
case CY_CAPSENSE_CSX_GROUP:
Cy_CapSense_CSXScanExt(context);
break;
#endif /* (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSX_EN) */
default:
scanStatus = CY_CAPSENSE_STATUS_BAD_CONFIG;
break;
}
}
return scanStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_ScanSensor_V2
****************************************************************************//**
*
* Starts a conversion on the specified sensor.
*
* Calling this function directly from the application program is not
* recommended. This function is used to implement only the user's specific
* use cases (for faster execution time or pipeline scanning, for example).
* This function is called when no scanning is in progress. I.e.
* Cy_CapSense_IsBusy() returns a non-busy status.
* If the widget is already configured by previous call of this function, the
* widget re-configuration is skipped.
*
* \note
* This function is available only for the fourth-generation CAPSENSE™.
*
* \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 sensorId
* Specifies the ID number of the sensor within the widget. A macro for the
* sensor ID within a specified widget can be found in the cycfg_capsense.h
* file defined as CY_CAPSENSE_<WIDGET_NAME>_SNS<SENSOR_NUMBER>_ID.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
*******************************************************************************/
cy_capsense_status_t Cy_CapSense_ScanSensor_V2(
uint32_t widgetId,
uint32_t sensorId,
cy_stc_capsense_context_t * context)
{
cy_stc_capsense_active_scan_sns_t * ptrActive = context->ptrActiveScanSns;
cy_capsense_status_t scanStatus = CY_CAPSENSE_STATUS_SUCCESS;
if (CY_CAPSENSE_BUSY == Cy_CapSense_IsBusy(context))
{
/* Previous widget is being scanned. Return error. */
scanStatus = CY_CAPSENSE_STATUS_INVALID_STATE;
}
else
{
if ((ptrActive->widgetIndex != (uint8_t)widgetId) ||
(ptrActive->sensorIndex != (uint8_t)sensorId) ||
(ptrActive->currentSenseMethod != context->ptrWdConfig[widgetId].senseMethod) ||
(ptrActive->connectedSnsState != CY_CAPSENSE_SNS_CONNECTED))
{
scanStatus = Cy_CapSense_SetupWidgetExt(widgetId, sensorId, context);
}
if (CY_CAPSENSE_STATUS_SUCCESS == scanStatus)
{
scanStatus = Cy_CapSense_ScanExt(context);
}
}
return scanStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_ScanAllWidgets_V2
****************************************************************************//**
*
* Initiates scanning of all enabled widgets (and sensors) in the project.
*
* The tasks of both Cy_CapSense_SetupWidget() and Cy_CapSense_Scan() functions
* are executed by this function. The status of a sensor scan must be checked
* using the Cy_CapSense_IsBusy() prior to starting the next scan or setting
* up another widget.
*
* This function initiates a scan only for the first sensor in the first widget
* and then exits the function. The scan for the remaining sensors are initiated
* in the interrupt service routine (part of middleware) triggered at the end
* of each scan completion. Hence, the status of the current scan should be
* checked using the Cy_CapSense_IsBusy() and wait until all scans is finished
* prior to starting a next scan or initializing another widget.
*
* \note
* This function is available only for the fourth-generation CAPSENSE™.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
* \return
* Returns the status of the operation:
* - CY_CAPSENSE_STATUS_SUCCESS - Scanning is successfully started.
* - CY_CAPSENSE_STATUS_BAD_PARAM - All the widgets are disabled.
* - CY_CAPSENSE_STATUS_INVALID_STATE - The previous scanning is not completed and the
* CSD HW block is busy.
*
*******************************************************************************/
cy_capsense_status_t Cy_CapSense_ScanAllWidgets_V2(cy_stc_capsense_context_t * context)
{
uint32_t wdgtIndex;
cy_stc_capsense_active_scan_sns_t * ptrActive = context->ptrActiveScanSns;
cy_capsense_status_t scanStatus = CY_CAPSENSE_STATUS_SUCCESS;
if (CY_CAPSENSE_BUSY == Cy_CapSense_IsBusy(context))
{
/* Previous widget is being scanned. Return error. */
scanStatus = CY_CAPSENSE_STATUS_INVALID_STATE;
}
else
{
/*
* Set up first widget. If widget returned error,
* set up next, continue same until widget does not return error.
*/
for (wdgtIndex = 0u; wdgtIndex < context->ptrCommonConfig->numWd; wdgtIndex++)
{
scanStatus = Cy_CapSense_SetupWidget(wdgtIndex, context);
if (CY_CAPSENSE_STATUS_SUCCESS == scanStatus)
{
ptrActive->scanScope = CY_CAPSENSE_SCAN_SCOPE_ALL_WD_MASK;
/* Initiate scan and quit loop */
scanStatus = Cy_CapSense_Scan(context);
break;
}
}
}
return scanStatus;
}
/*******************************************************************************
* Function Name: Cy_CapSense_InternalPreCalculation
****************************************************************************//**
*
* Calculate different internal parameters, register values in advance to
* speed up execution time.
*
* \param context
* The pointer to the CAPSENSE™ context structure \ref cy_stc_capsense_context_t.
*
* \return status
* Returns status of operation:
* - Zero - Indicates successful initialization.
* - Non-zero - One or more errors occurred in the initialization process.
*
*******************************************************************************/
cy_capsense_status_t Cy_CapSense_InternalPreCalculation(cy_stc_capsense_context_t * context)
{
cy_capsense_status_t initStatus = CY_CAPSENSE_STATUS_SUCCESS;
uint32_t wdgtIndex;
uint32_t temp;
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_EN)
if ((context->ptrCommonConfig->portCmodPadNum == context->ptrCommonConfig->portCmodNum) &&
(context->ptrCommonConfig->pinCmodPad == context->ptrCommonConfig->pinCmod))
{
context->ptrInternalContext->csdCmodConnection = (uint8_t)CY_CAPSENSE_CMODPAD_E;
}
else if ((context->ptrCommonConfig->portCshPadNum == context->ptrCommonConfig->portCmodNum) &&
(context->ptrCommonConfig->pinCshPad == context->ptrCommonConfig->pinCmod))
{
context->ptrInternalContext->csdCmodConnection = (uint8_t)CY_CAPSENSE_CTANKPAD_E;
}
else if ((context->ptrCommonConfig->portShieldPadNum == context->ptrCommonConfig->portCmodNum) &&
(context->ptrCommonConfig->pinShieldPad == context->ptrCommonConfig->pinCmod))
{
context->ptrInternalContext->csdCmodConnection = (uint8_t)CY_CAPSENSE_CSHIELDPAD_E;
}
else if ((context->ptrCommonConfig->portVrefExtPadNum == context->ptrCommonConfig->portCmodNum) &&
(context->ptrCommonConfig->pinVrefExtPad == context->ptrCommonConfig->pinCmod))
{
context->ptrInternalContext->csdCmodConnection = (uint8_t)CY_CAPSENSE_VREFEXTPAD_E;
}
else
{
context->ptrInternalContext->csdCmodConnection = (uint8_t)CY_CAPSENSE_CMODPAD_E;
initStatus = CY_CAPSENSE_STATUS_BAD_PARAM;
}
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_CAP_EN)
/* Csh Capacitor Placement */
if ((context->ptrCommonConfig->portCmodPadNum == context->ptrCommonConfig->portCshNum) &&
(context->ptrCommonConfig->pinCmodPad == context->ptrCommonConfig->pinCsh))
{
context->ptrInternalContext->csdCshConnection = (uint8_t)CY_CAPSENSE_CMODPAD_E;
}
else if ((context->ptrCommonConfig->portCshPadNum == context->ptrCommonConfig->portCshNum) &&
(context->ptrCommonConfig->pinCshPad == context->ptrCommonConfig->pinCsh))
{
context->ptrInternalContext->csdCshConnection = (uint8_t)CY_CAPSENSE_CTANKPAD_E;
}
else if ((context->ptrCommonConfig->portShieldPadNum == context->ptrCommonConfig->portCshNum) &&
(context->ptrCommonConfig->pinShieldPad == context->ptrCommonConfig->pinCsh))
{
context->ptrInternalContext->csdCshConnection = (uint8_t)CY_CAPSENSE_CSHIELDPAD_E;
}
else if ((context->ptrCommonConfig->portVrefExtPadNum == context->ptrCommonConfig->portCshNum) &&
(context->ptrCommonConfig->pinVrefExtPad == context->ptrCommonConfig->pinCsh))
{
context->ptrInternalContext->csdCshConnection = (uint8_t)CY_CAPSENSE_VREFEXTPAD_E;
}
else
{
context->ptrInternalContext->csdCshConnection = (uint8_t)CY_CAPSENSE_CTANKPAD_E;
initStatus = CY_CAPSENSE_STATUS_BAD_PARAM;
}
#else
context->ptrInternalContext->csdCshConnection = 0u;
#endif
/* Switch CSD Comparator Selection */
switch (context->ptrInternalContext->csdCmodConnection)
{
case (uint8_t)CY_CAPSENSE_CMODPAD_E:
context->ptrInternalContext->csdRegSwCmpPSel = CY_CAPSENSE_CSD_SW_CMP_P_SEL_SW_SFPM_STATIC_CLOSE;
break;
case (uint8_t)CY_CAPSENSE_CSHIELDPAD_E:
context->ptrInternalContext->csdRegSwCmpPSel = CY_CAPSENSE_CSD_SW_CMP_P_SEL_SW_SFPS_STATIC_CLOSE;
break;
default:
context->ptrInternalContext->csdRegSwCmpPSel = CY_CAPSENSE_CSD_SW_CMP_P_SEL_SW_SFPT_STATIC_CLOSE;
break;
}
context->ptrInternalContext->csdRegSwCmpNSel = CY_CAPSENSE_CSD_SW_CMP_N_SEL_SW_SCRH_STATIC_CLOSE;
/* Defines the drive mode of pins depending on the Inactive sensor connection setting */
(void)Cy_CapSense_SetInactiveElectrodeState(context->ptrCommonConfig->csdInactiveSnsConnection,
CY_CAPSENSE_CSD_GROUP, context);
/* Prepares CONFIG register value */
context->ptrInternalContext->csdRegConfig = 0u;
/* Iref Source */
#if (CY_CAPSENSE_PSOC6_FOURTH_GEN)
if (CY_CAPSENSE_IREF_PASS == context->ptrCommonConfig->ssIrefSource)
{
context->ptrInternalContext->csdRegConfig |= CY_CAPSENSE_CSD_CONFIG_IREF_SEL_MSK;
}
#endif
/* Filter Delay */
temp = context->ptrCommonConfig->periClkHz / context->ptrCommonContext->modCsdClk;
if (temp > CY_CAPSENSE_MOD_CSD_CLK_24000000_HZ)
{
context->ptrInternalContext->csdRegConfig |= CY_CAPSENSE_CSD_CONFIG_FILTER_DELAY_48MHZ;
}
else if (temp > CY_CAPSENSE_MOD_CSD_CLK_12000000_HZ)
{
context->ptrInternalContext->csdRegConfig |= CY_CAPSENSE_CSD_CONFIG_FILTER_DELAY_24MHZ;
}
else
{
context->ptrInternalContext->csdRegConfig |= CY_CAPSENSE_CSD_CONFIG_FILTER_DELAY_12MHZ;
}
/* Shield Delay */
context->ptrInternalContext->csdRegConfig |= (((uint32_t)context->ptrCommonConfig->csdShieldDelay) << CY_CAPSENSE_CSD_CONFIG_SHIELD_DELAY_POS);
/* Sense Enable */
context->ptrInternalContext->csdRegConfig |= CSD_CONFIG_SENSE_EN_Msk;
/* Power On */
context->ptrInternalContext->csdRegConfig |= CSD_CONFIG_ENABLE_Msk;
context->ptrInternalContext->csdRegSwHsPSelCmodInit = 0u;
context->ptrInternalContext->csdRegSwHsPSelCtankInit = 0u;
context->ptrInternalContext->csdRegSwHsPSelScan = 0u;
switch (context->ptrInternalContext->csdCmodConnection)
{
case (uint8_t)CY_CAPSENSE_CMODPAD_E:
context->ptrInternalContext->csdRegSwHsPSelCmodInit = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPM_STATIC_CLOSE;
break;
case (uint8_t)CY_CAPSENSE_CSHIELDPAD_E:
context->ptrInternalContext->csdRegSwHsPSelCmodInit = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPS_STATIC_CLOSE;
break;
default:
context->ptrInternalContext->csdRegSwHsPSelCmodInit = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPT_STATIC_CLOSE;
break;
}
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_EN)
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_CAP_EN)
switch (context->ptrInternalContext->csdCshConnection)
{
case (uint8_t)CY_CAPSENSE_CMODPAD_E:
context->ptrInternalContext->csdRegSwHsPSelCtankInit = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPM_STATIC_CLOSE;
context->ptrInternalContext->csdRegSwHsPSelScan = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPM_STATIC_CLOSE;
break;
case (uint8_t)CY_CAPSENSE_CSHIELDPAD_E:
context->ptrInternalContext->csdRegSwHsPSelCtankInit = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPS_STATIC_CLOSE;
context->ptrInternalContext->csdRegSwHsPSelScan = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPS_STATIC_CLOSE;
break;
default:
context->ptrInternalContext->csdRegSwHsPSelCtankInit = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPT_STATIC_CLOSE;
context->ptrInternalContext->csdRegSwHsPSelScan = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMPT_STATIC_CLOSE;
break;
}
#else
context->ptrInternalContext->csdRegSwHsPSelScan = CY_CAPSENSE_CSD_SW_HS_P_SEL_SW_HMMB_STATIC_CLOSE;
#endif
/* BYP switch selection */
context->ptrInternalContext->csdRegSwBypSel = CY_CAPSENSE_CSD_SW_BYP_SEL_SW_BYA_MSK | CY_CAPSENSE_CSD_SW_BYP_SEL_SW_BYB_MSK;
#else
context->ptrInternalContext->csdRegSwBypSel = CY_CAPSENSE_CSD_SW_BYP_SEL_SW_BYA_MSK;
#endif
/* Switch resistance selection */
context->ptrInternalContext->csdRegSwResInit = ((uint32_t)context->ptrCommonConfig->csdInitSwRes << CSD_SW_RES_RES_HCAV_Pos) |
((uint32_t)context->ptrCommonConfig->csdInitSwRes << CSD_SW_RES_RES_HCBV_Pos);
context->ptrInternalContext->csdRegSwResScan = ((uint32_t)context->ptrCommonConfig->csdShieldSwRes << CSD_SW_RES_RES_HCBV_Pos) |
((uint32_t)context->ptrCommonConfig->csdShieldSwRes << CSD_SW_RES_RES_HCBG_Pos);
/* Switch DSI selection */
context->ptrInternalContext->csdRegSwDsiSel = CY_CAPSENSE_DEFAULT_CSD_SW_DSI_SEL;
#if (CY_CAPSENSE_PSOC4_FOURTH_GEN)
switch (context->ptrInternalContext->csdCmodConnection)
{
case (uint8_t)CY_CAPSENSE_CMODPAD_E:
context->ptrInternalContext->csdRegSwDsiSel |= CY_CAPSENSE_CSD_SW_DSI_SEL_CMOD_MSK;
break;
case (uint8_t)CY_CAPSENSE_CTANKPAD_E:
context->ptrInternalContext->csdRegSwDsiSel |= CY_CAPSENSE_CSD_SW_DSI_SEL_CSH_TANK_MSK;
break;
default:
/* No action on other connections */
break;
}
#if ((CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_EN) && \
(CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_CAP_EN))
switch (context->ptrInternalContext->csdCshConnection)
{
case (uint8_t)CY_CAPSENSE_CMODPAD_E:
context->ptrInternalContext->csdRegSwDsiSel |= CY_CAPSENSE_CSD_SW_DSI_SEL_CMOD_MSK;
break;
case (uint8_t)CY_CAPSENSE_CTANKPAD_E:
context->ptrInternalContext->csdRegSwDsiSel |= CY_CAPSENSE_CSD_SW_DSI_SEL_CSH_TANK_MSK;
break;
default:
/* No action on other connections */
break;
}
#endif
#endif
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_EN)
if (CY_CAPSENSE_LOW_VOLTAGE_LIMIT > context->ptrCommonConfig->vdda)
{
context->ptrInternalContext->csdRegAmuxbufInit = CY_CAPSENSE_CSD_AMBUF_PWR_MODE_NORM;
}
else
{
context->ptrInternalContext->csdRegAmuxbufInit = CY_CAPSENSE_CSD_AMBUF_PWR_MODE_HI;
}
#else
context->ptrInternalContext->csdRegAmuxbufInit = CY_CAPSENSE_CSD_AMBUF_PWR_MODE_OFF;
#endif
/* Switch AMUXBUF selection */
context->ptrInternalContext->csdRegSwAmuxbufSel = 0u;
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_EN)
if (((CY_CAPSENSE_LOW_VOLTAGE_LIMIT > context->ptrCommonConfig->vdda) &&
(CY_CAPSENSE_IDAC_SINKING == context->ptrCommonConfig->csdChargeTransfer)) ||
((CY_CAPSENSE_LOW_VOLTAGE_LIMIT <= context->ptrCommonConfig->vdda) &&
(CY_CAPSENSE_IDAC_SOURCING == context->ptrCommonConfig->csdChargeTransfer)))
{
context->ptrInternalContext->csdRegSwAmuxbufSel = CY_CAPSENSE_CSD_SW_AMUXBUF_SEL_SW_IRH_STATIC_CLOSE | CY_CAPSENSE_CSD_SW_AMUXBUF_SEL_SW_ICB_PHI2;
}
#endif
context->ptrInternalContext->csdRegSwShieldSelScan = 0u;
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_EN)
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_CAP_EN)
if (CY_CAPSENSE_IDAC_SINKING == context->ptrCommonConfig->csdChargeTransfer)
{
context->ptrInternalContext->csdRegSwShieldSelScan = CY_CAPSENSE_CSD_SW_SHIELD_SEL_SW_HCBG_HSCMP;
}
else
{
context->ptrInternalContext->csdRegSwShieldSelScan = CY_CAPSENSE_CSD_SW_SHIELD_SEL_SW_HCBV_PHI1_HSCMP;
}
#else
if (CY_CAPSENSE_IDAC_SINKING == context->ptrCommonConfig->csdChargeTransfer)
{
context->ptrInternalContext->csdRegSwShieldSelScan = CY_CAPSENSE_CSD_SW_SHIELD_SEL_SW_HCBV_PHI1 |
CY_CAPSENSE_CSD_SW_SHIELD_SEL_SW_HCBG_PHI2_HSCMP;
}
else
{
context->ptrInternalContext->csdRegSwShieldSelScan = CY_CAPSENSE_CSD_SW_SHIELD_SEL_SW_HCBG_PHI1 |
CY_CAPSENSE_CSD_SW_SHIELD_SEL_SW_HCBV_PHI2_HSCMP;
}
#endif
#endif
/* High-Speed Comparator initialization */
context->ptrInternalContext->csdRegHscmpInit = CY_CAPSENSE_CSD_HSCMP_HSCMP_EN_MSK;
context->ptrInternalContext->csdRegHscmpScan = CY_CAPSENSE_CSD_HSCMP_HSCMP_EN_MSK;
if (CY_CAPSENSE_IDAC_SINKING == context->ptrCommonConfig->csdChargeTransfer)
{
context->ptrInternalContext->csdRegHscmpScan = CY_CAPSENSE_CSD_HSCMP_HSCMP_EN_MSK | CY_CAPSENSE_CSD_HSCMP_HSCMP_INVERT_MSK;
}
#if (CY_CAPSENSE_DISABLE == CY_CAPSENSE_CSD_SHIELD_EN)
context->ptrInternalContext->csdRegHscmpScan = 0u;
#endif
/* IDACs Config */
context->ptrInternalContext->csdIdacAConfig = context->ptrCommonConfig->idacGainTable[0u].gainReg;
context->ptrInternalContext->csdIdacBConfig = context->ptrCommonConfig->idacGainTable[0u].gainReg;
/* IDACs Polarities */
if (CY_CAPSENSE_IDAC_SINKING == context->ptrCommonConfig->csdChargeTransfer)
{
context->ptrInternalContext->csdIdacAConfig |= (CY_CAPSENSE_CSD_IDACA_POLARITY_VDDA_SNK << CY_CAPSENSE_CSD_IDACA_POLARITY_POS);
context->ptrInternalContext->csdIdacBConfig |= (CY_CAPSENSE_CSD_IDACB_POLARITY_VDDA_SNK << CY_CAPSENSE_CSD_IDACB_POLARITY_POS);
}
else
{
context->ptrInternalContext->csdIdacAConfig |= (CY_CAPSENSE_CSD_IDACA_POLARITY_VSSA_SRC << CY_CAPSENSE_CSD_IDACA_POLARITY_POS);
context->ptrInternalContext->csdIdacBConfig |= (CY_CAPSENSE_CSD_IDACB_POLARITY_VSSA_SRC << CY_CAPSENSE_CSD_IDACB_POLARITY_POS);
}
/* IDACs Balancing Mode */
context->ptrInternalContext->csdIdacAConfig |= (CY_CAPSENSE_CSD_IDACA_BALL_MODE_FULL << CY_CAPSENSE_CSD_IDACA_BALL_MODE_POS);
context->ptrInternalContext->csdIdacBConfig |= (CY_CAPSENSE_CSD_IDACB_BALL_MODE_FULL << CY_CAPSENSE_CSD_IDACB_BALL_MODE_POS);
/* Legs Config */
context->ptrInternalContext->csdIdacAConfig |= (CY_CAPSENSE_CSD_IDACA_LEG1_MODE_CSD << CY_CAPSENSE_CSD_IDACA_LEG1_MODE_POS);
context->ptrInternalContext->csdIdacAConfig |= (CY_CAPSENSE_CSD_IDACA_LEG2_MODE_CSD << CY_CAPSENSE_CSD_IDACA_LEG2_MODE_POS);
context->ptrInternalContext->csdIdacAConfig |= (CY_CAPSENSE_CSD_IDACA_LEG1_EN_MSK);
context->ptrInternalContext->csdIdacBConfig |= (CY_CAPSENSE_CSD_IDACB_LEG1_MODE_CSD_STATIC << CY_CAPSENSE_CSD_IDACB_LEG1_MODE_POS);
context->ptrInternalContext->csdIdacBConfig |= (CY_CAPSENSE_CSD_IDACB_LEG2_MODE_CSD_STATIC << CY_CAPSENSE_CSD_IDACB_LEG2_MODE_POS);
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_IDAC_COMP_EN)
context->ptrInternalContext->csdIdacBConfig |= (CY_CAPSENSE_CSD_IDACB_LEG1_EN_MSK);
#endif
/* IO Control Selection */
if (CY_CAPSENSE_IDAC_SINKING == context->ptrCommonConfig->csdChargeTransfer)
{
#if (CY_CAPSENSE_ENABLE == CY_CAPSENSE_CSD_SHIELD_EN)
context->ptrInternalContext->csdRegIoSel = (CY_CAPSENSE_CSD_TX_N_OUT_EN_PHI1 |
CY_CAPSENSE_CSD_TX_N_AMUXA_EN_PHI2 |
CY_CAPSENSE_CSD_TX_OUT_EN_PHI1_DELAY |
CY_CAPSENSE_CSD_TX_AMUXB_EN_PHI2_DELAY |
CY_CAPSENSE_CSD_TX_OUT_MSK |
CY_CAPSENSE_CSD_TX_N_OUT_STATIC_CLOSE);
#else
context->ptrInternalContext->csdRegIoSel = (CY_CAPSENSE_CSD_TX_N_OUT_EN_PHI1 |
CY_CAPSENSE_CSD_TX_N_AMUXA_EN_PHI2 |
CY_CAPSENSE_CSD_TX_N_OUT_STATIC_CLOSE);
#endif
}
else