[参考译文] MSP430FR2675：电容式触控动态参数

https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1285264/msp430fr2675-dynamic-parameters-for-capacitive-touch

大家好！

我想知道是否可以通过授权来设置 MSP430的电容式触控参数、即转换计数、接近和触控阈值。 我试图将参数设置为 noinit、以便我可以更改该值并将其保存在超常存储器中(我用于另一个参数的方法)、但收到错误"#28表达式必须具有常数值"。

我非常确信可以在 MSP 运行时更改这些值、因为这正是我们使用 CapTIvate 设计中心工具来校准触控传感器时所要做的。

非常感谢在这方面提供任何帮助。

此致、

约安

#include "CAPT_UserConfig.h"

#pragma NOINIT(conv_count)
uint16_t conv_count;
#pragma NOINIT(prox_threshold)
uint16_t prox_threshold;
#pragma NOINIT(touch_threshold)
uint16_t touch_threshold;

//*****************************************************************************
//
//! 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: PRX01, Element: E00
uint16_t PRX01_E00_RawCnts[CAPT_SELF_FREQ_CNT];
tCaptivateElementTuning PRX01_E00_Tuning[CAPT_SELF_FREQ_CNT];
tElement PRX01_E00 =
{
    .ui8RxPin = 0,
    .ui8RxBlock = 1,
    .ui8TouchThreshold = touch_threshold,
    .pRawCount = PRX01_E00_RawCnts,
    .pTuning = PRX01_E00_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: PRX01_C00
tElement* PRX01_C00_Elements[1] =
{
    &PRX01_E00,
};
tCycle PRX01_C00 =
{
    .ui8NrOfElements = 1,
    .pElements = PRX01_C00_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: PRX01
const tCycle* PRX01_Cycles[1] =
{
    &PRX01_C00,
};

tProxSensorParams PRX01_Params =
{
    .pSensor = NULL,
    .ui8NumberOfSensors = 0,
};

tSensor PRX01 =
{
    // Basic Properties
    .TypeOfSensor = eProx,
    .SensingMethod = eSelf,
    .DirectionOfInterest = eDOIDown,
    .pvCallback = NULL,
    .ui8NrOfCycles = 1,
    .pCycle = PRX01_Cycles,
    .pSensorParams = (tGenericSensorParams*)&PRX01_Params,
    // Conversion Control Parameters
    .ui16ConversionCount = conv_count,
    .ui16ConversionGain = 200,
    .ui8FreqDiv = 2,
    .ui8ChargeLength = 0,
    .ui8TransferLength = 0,
    .bModEnable = false,
    .ui8BiasControl = 3,
    .bCsDischarge = true,
    .bLpmControl = false,
    .ui8InputSyncControl = 0,
    .bTimerSyncControl = false,
    .bIdleState = true,
    // Tuning  Parameters
    .ui16ProxThreshold = prox_threshold,
    .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,
};