Other Parts Discussed in Thread: CAPTIVATE-PHONE,
Hello,
I am using MSP430FR2633 TSSOP package controller for 16 elements keypad sensor for touchpad. I am using mutual capacitance technology for this purpose. I have followed the hardware layout design of CAPTIVATE-PHONE. Though I am able to detect the finger touch on keypad, I observed that on frequent touching of keypad elements, suddenly touch detection is stopped. However after waiting for few seconds, it starts the detection. I have also observed that when I am bringing the finger in the proximity of keypad element, it detects the touch every time. Touch detection stops only when there is direct contact with the keypad element. There is no overlay material on keypad elements. Please help. Following is my captouch config generated from design center tool.
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// Generated by Captivate Design Center v1_83_00_08 on Wed Jul 28 17:23:59 IST 2021
//*****************************************************************************
// CAPT_UserConfig.c
//
// \version 1.83.00.05
// Released on May 15, 2020
//
//*****************************************************************************
//*****************************************************************************
//
// NOTE: This is an automatically generated source code file! The Captivate
// Design Center generates the User Configuration file automatically based
// upon the sensor layout that was created.
//
// Changes to this file will be OVERWRITTEN if a you select
// "Update Existing Project" under "Generate Source Code" in the Design Center.
//
// To avoid interference with the code generation process, keep ALL application
// code external to this file.
//
//*****************************************************************************
#include "CAPT_UserConfig.h"
//*****************************************************************************
//
//! Captivate Element Definitions
//! All elements in this application are defined below.
//! Each element has 3 components:
//! 1) a raw count array (One index per freq. scanned) (uint16_t)
//! 2) a tuning array (One index per freq. scanned) (tCaptivateElementTuning)
//! 3) a element structure (tElement)
//
//*****************************************************************************
// Sensor: BTN00, Element: E00
uint16_t BTN00_E00_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E00_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E00 =
{
.ui8TxPin = 3,
.ui8TxBlock = 1,
.ui8RxPin = 0,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E00_RawCnts,
.pTuning = BTN00_E00_Tuning,
};
// Sensor: BTN00, Element: E01
uint16_t BTN00_E01_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E01_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E01 =
{
.ui8TxPin = 3,
.ui8TxBlock = 1,
.ui8RxPin = 1,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E01_RawCnts,
.pTuning = BTN00_E01_Tuning,
};
// Sensor: BTN00, Element: E02
uint16_t BTN00_E02_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E02_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E02 =
{
.ui8TxPin = 3,
.ui8TxBlock = 1,
.ui8RxPin = 2,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E02_RawCnts,
.pTuning = BTN00_E02_Tuning,
};
// Sensor: BTN00, Element: E03
uint16_t BTN00_E03_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E03_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E03 =
{
.ui8TxPin = 3,
.ui8TxBlock = 1,
.ui8RxPin = 3,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E03_RawCnts,
.pTuning = BTN00_E03_Tuning,
};
// Sensor: BTN00, Element: E04
uint16_t BTN00_E04_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E04_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E04 =
{
.ui8TxPin = 2,
.ui8TxBlock = 1,
.ui8RxPin = 0,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E04_RawCnts,
.pTuning = BTN00_E04_Tuning,
};
// Sensor: BTN00, Element: E05
uint16_t BTN00_E05_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E05_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E05 =
{
.ui8TxPin = 2,
.ui8TxBlock = 1,
.ui8RxPin = 1,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E05_RawCnts,
.pTuning = BTN00_E05_Tuning,
};
// Sensor: BTN00, Element: E06
uint16_t BTN00_E06_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E06_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E06 =
{
.ui8TxPin = 2,
.ui8TxBlock = 1,
.ui8RxPin = 2,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E06_RawCnts,
.pTuning = BTN00_E06_Tuning,
};
// Sensor: BTN00, Element: E07
uint16_t BTN00_E07_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E07_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E07 =
{
.ui8TxPin = 2,
.ui8TxBlock = 1,
.ui8RxPin = 3,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E07_RawCnts,
.pTuning = BTN00_E07_Tuning,
};
// Sensor: BTN00, Element: E08
uint16_t BTN00_E08_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E08_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E08 =
{
.ui8TxPin = 1,
.ui8TxBlock = 1,
.ui8RxPin = 0,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E08_RawCnts,
.pTuning = BTN00_E08_Tuning,
};
// Sensor: BTN00, Element: E09
uint16_t BTN00_E09_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E09_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E09 =
{
.ui8TxPin = 1,
.ui8TxBlock = 1,
.ui8RxPin = 1,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E09_RawCnts,
.pTuning = BTN00_E09_Tuning,
};
// Sensor: BTN00, Element: E10
uint16_t BTN00_E10_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E10_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E10 =
{
.ui8TxPin = 1,
.ui8TxBlock = 1,
.ui8RxPin = 2,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E10_RawCnts,
.pTuning = BTN00_E10_Tuning,
};
// Sensor: BTN00, Element: E11
uint16_t BTN00_E11_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E11_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E11 =
{
.ui8TxPin = 1,
.ui8TxBlock = 1,
.ui8RxPin = 3,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E11_RawCnts,
.pTuning = BTN00_E11_Tuning,
};
// Sensor: BTN00, Element: E12
uint16_t BTN00_E12_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E12_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E12 =
{
.ui8TxPin = 0,
.ui8TxBlock = 1,
.ui8RxPin = 0,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E12_RawCnts,
.pTuning = BTN00_E12_Tuning,
};
// Sensor: BTN00, Element: E13
uint16_t BTN00_E13_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E13_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E13 =
{
.ui8TxPin = 0,
.ui8TxBlock = 1,
.ui8RxPin = 1,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E13_RawCnts,
.pTuning = BTN00_E13_Tuning,
};
// Sensor: BTN00, Element: E14
uint16_t BTN00_E14_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E14_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E14 =
{
.ui8TxPin = 0,
.ui8TxBlock = 1,
.ui8RxPin = 2,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E14_RawCnts,
.pTuning = BTN00_E14_Tuning,
};
// Sensor: BTN00, Element: E15
uint16_t BTN00_E15_RawCnts[CAPT_MUTUAL_FREQ_CNT];
tCaptivateElementTuning BTN00_E15_Tuning[CAPT_MUTUAL_FREQ_CNT];
tElement BTN00_E15 =
{
.ui8TxPin = 0,
.ui8TxBlock = 1,
.ui8RxPin = 3,
.ui8RxBlock = 2,
.ui8TouchThreshold = 10,
.pRawCount = BTN00_E15_RawCnts,
.pTuning = BTN00_E15_Tuning,
};
//*****************************************************************************
//
//! Captivate Time Cycle Definitions
//! All time cycles in this application are defined below. Time cycles are
//! groups of elements that are measured together in parallel in one time slot.
//! Each cycle has 2 components:
//! 1) an element pointer array to the member elements (tElement*)
//! 2) a cycle structure (tCycle)
//
//*****************************************************************************
// Time Cycle: BTN00_C00
tElement* BTN00_C00_Elements[1] =
{
&BTN00_E00,
};
tCycle BTN00_C00 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C00_Elements,
};
// Time Cycle: BTN00_C01
tElement* BTN00_C01_Elements[1] =
{
&BTN00_E01,
};
tCycle BTN00_C01 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C01_Elements,
};
// Time Cycle: BTN00_C02
tElement* BTN00_C02_Elements[1] =
{
&BTN00_E02,
};
tCycle BTN00_C02 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C02_Elements,
};
// Time Cycle: BTN00_C03
tElement* BTN00_C03_Elements[1] =
{
&BTN00_E03,
};
tCycle BTN00_C03 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C03_Elements,
};
// Time Cycle: BTN00_C04
tElement* BTN00_C04_Elements[1] =
{
&BTN00_E04,
};
tCycle BTN00_C04 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C04_Elements,
};
// Time Cycle: BTN00_C05
tElement* BTN00_C05_Elements[1] =
{
&BTN00_E05,
};
tCycle BTN00_C05 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C05_Elements,
};
// Time Cycle: BTN00_C06
tElement* BTN00_C06_Elements[1] =
{
&BTN00_E06,
};
tCycle BTN00_C06 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C06_Elements,
};
// Time Cycle: BTN00_C07
tElement* BTN00_C07_Elements[1] =
{
&BTN00_E07,
};
tCycle BTN00_C07 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C07_Elements,
};
// Time Cycle: BTN00_C08
tElement* BTN00_C08_Elements[1] =
{
&BTN00_E08,
};
tCycle BTN00_C08 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C08_Elements,
};
// Time Cycle: BTN00_C09
tElement* BTN00_C09_Elements[1] =
{
&BTN00_E09,
};
tCycle BTN00_C09 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C09_Elements,
};
// Time Cycle: BTN00_C10
tElement* BTN00_C10_Elements[1] =
{
&BTN00_E10,
};
tCycle BTN00_C10 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C10_Elements,
};
// Time Cycle: BTN00_C11
tElement* BTN00_C11_Elements[1] =
{
&BTN00_E11,
};
tCycle BTN00_C11 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C11_Elements,
};
// Time Cycle: BTN00_C12
tElement* BTN00_C12_Elements[1] =
{
&BTN00_E12,
};
tCycle BTN00_C12 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C12_Elements,
};
// Time Cycle: BTN00_C13
tElement* BTN00_C13_Elements[1] =
{
&BTN00_E13,
};
tCycle BTN00_C13 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C13_Elements,
};
// Time Cycle: BTN00_C14
tElement* BTN00_C14_Elements[1] =
{
&BTN00_E14,
};
tCycle BTN00_C14 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C14_Elements,
};
// Time Cycle: BTN00_C15
tElement* BTN00_C15_Elements[1] =
{
&BTN00_E15,
};
tCycle BTN00_C15 =
{
.ui8NrOfElements = 1,
.pElements = BTN00_C15_Elements,
};
//*****************************************************************************
//
//! Captivate Sensor Definitions
//! All sensors in this application are defined below. Sensors are
//! groups of time cycles that utilize raw measurement data to create an
//! abstract sensor type, such as a button, slider, wheel, or prox sensor.
//! Each sensor has 3 components:
//! 1) a cycle pointer array to the member time cycles (tCycle*)
//! 2) a sensor-specific parameter structure (tGenericSensorParams)
//! 3) a sensor structure (tSensor)
//
//*****************************************************************************
//Sensor: BTN00
const tCycle* BTN00_Cycles[16] =
{
&BTN00_C00,
&BTN00_C01,
&BTN00_C02,
&BTN00_C03,
&BTN00_C04,
&BTN00_C05,
&BTN00_C06,
&BTN00_C07,
&BTN00_C08,
&BTN00_C09,
&BTN00_C10,
&BTN00_C11,
&BTN00_C12,
&BTN00_C13,
&BTN00_C14,
&BTN00_C15,
};
tButtonSensorParams BTN00_Params;
tSensor BTN00 =
{
// Basic Properties
.TypeOfSensor = eButtonGroup,
.SensingMethod = eProjected,
.DirectionOfInterest = eDOIUp,
.pvCallback = NULL,
.ui8NrOfCycles = 16,
.pCycle = BTN00_Cycles,
.pSensorParams = (tGenericSensorParams*)&BTN00_Params,
// Conversion Control Parameters
.ui16ConversionCount = 500,
.ui16ConversionGain = 100,
.ui8FreqDiv = 1,
.ui8ChargeLength = 0,
.ui8TransferLength = 0,
.bModEnable = false,
.ui8BiasControl = 3,
.bCsDischarge = true,
.bLpmControl = false,
.ui8InputSyncControl = 0,
.bTimerSyncControl = false,
.bIdleState = true,
// Tuning Parameters
.ui16ProxThreshold = 10,
.ui16NegativeTouchThreshold = 30,
.ui16ErrorThreshold = 8191,
.ui16TimeoutThreshold = 65535,
.ProxDbThreshold.DbIn = 1,
.ProxDbThreshold.DbOut = 0,
.TouchDbThreshold.DbIn = 1,
.TouchDbThreshold.DbOut = 0,
.bCountFilterEnable = true,
.ui8CntBeta = 1,
.bSensorHalt = false,
.bPTSensorHalt = true,
.bPTElementHalt = true,
.ui8LTABeta = 7,
.bReCalibrateEnable = true,
};
#if (CAPT_CONDUCTED_NOISE_IMMUNITY_ENABLE==true)
//*****************************************************************************
//
//! \var g_EMCConfig
//! This structure stores the EMC configuration for this application.
//
//*****************************************************************************
const tEMCConfig g_EMCConfig =
{
// Conversion Style
.selfModeConversionStyle = CAPT_SELF_MODE_CONVERSION_STYLE,
.projModeConversionStyle = CAPT_PROJ_MODE_CONVERSION_STYLE,
// Oversampling Style
.selfModeOversamplingStyle = CAPT_SELF_MODE_OVERSAMPLING_STYLE,
.projModeOversamplingStyle = CAPT_PROJ_MODE_OVERSAMPLING_STYLE,
// Jitter Filter Enable
.bJitterFilterEnable = true,
// Noise Thresholds and Calibration Noise Limits
.ui8NoiseThreshold = CAPT_NOISE_THRESHOLD,
.ui16CalibrationNoiseLimit = CAPT_CALIBRATION_NOISE_LIMIT,
.ui8CalibrationTestSampleSize = 8,
// Dynamic Threshold Adjustment Parameters
.bEnableDynamicThresholdAdjustment = CAPT_DYNAMIC_THRESHOLD_ADJUSTMENT,
.ui8MaxRelThreshAdj = 76,
.ui8NoiseLevelFilterEntryThresh = 40,
.ui8NoiseLevelFilterExitThresh = 0,
.ui8NoiseLevelFilterDown = 6,
.ui8NoiseLevelFilterUp = 1,
.coeffA = _IQ31(0.0065),
.coeffB = _IQ31(0.050)
};
#endif
//*****************************************************************************
//
//! \var g_pCaptivateSensorArray
//! This array allows for indexed access to any
//! sensor in the configuration.
//
//*****************************************************************************
tSensor* g_pCaptivateSensorArray[CAPT_SENSOR_COUNT] =
{
&BTN00,
};
//*****************************************************************************
//
//! \var g_uiApp
//! This structure stores the global settings for this application.
//
//*****************************************************************************
tCaptivateApplication g_uiApp =
{
.state = eUIActive,
.pSensorList = &g_pCaptivateSensorArray[0],
.ui8NrOfSensors = CAPT_SENSOR_COUNT,
.ui8AppLPM = CAPT_LOW_POWER_MODE,
.bElementDataTxEnable = true,
.bSensorDataTxEnable = true,
.ui16ActiveModeScanPeriod = 33,
.ui16WakeOnProxModeScanPeriod = 100,
.ui16InactivityTimeout = 32,
.ui8WakeupInterval = 5,
};
Thanks and Regards,
Omkar
