/***************************************************************************//*!
*
* @brief Initializes the modules for the sensing of the electrodes
*
* @param Nothing
*
* @return Status Code
*
* @remarks
*
****************************************************************************/
uint8_t TSS_SensorInit(uint8_t u8Command)
{
uint8_t u8result = TSS_INIT_STATUS_OK;
if ((u8Command == TSS_INIT_COMMAND_INIT_MODULES) || (u8Command == TSS_INIT_COMMAND_ENABLE_ELECTRODES) || (u8Command == TSS_INIT_COMMAND_RECALIBRATE))
{
/* Global Timer Initialization */
#if TSS_HW_TIMER_USED
TSS_HW_TIMER_STOP(); /* Stops the timer */
TSS_HW_TIMER_RESET(); /* Resets the timer */
#ifdef TSS_ONPROXIMITY_CALLBACK
if (tss_CSSys.SystemConfig.ProximityEn)
{
TSS_HW_TIMER_SET_PRESCALE(TSS_SENSOR_PROX_PRESCALER); /* Sets a preescaler value */
TSS_HW_TIMER_SET_MOD(TSS_SENSOR_PROX_TIMEOUT); /* Sets the timeout value */
}
else
{
TSS_HW_TIMER_SET_PRESCALE(TSS_SENSOR_PRESCALER); /* Sets a preescaler value */
TSS_HW_TIMER_SET_MOD(TSS_SENSOR_TIMEOUT); /* Sets the timeout value */
}
#else
TSS_HW_TIMER_SET_PRESCALE(TSS_SENSOR_PRESCALER); /* Sets a preescaler value */
TSS_HW_TIMER_SET_MOD(TSS_SENSOR_TIMEOUT); /* Sets the timeout value */
#endif
TSS_HW_TIMER_ENABLE_INT(); /* Enable Timer interrupt */
#endif
/* GPIO Method Initialization */
#if TSS_DETECT_METHOD(GPIO)
(void) GPIO_SensorInit();
#endif
}
/* TSIL Initialization */
#if TSS_DETECT_METHOD(TSIL)
u8result = TSIL_SensorInit(u8Command);
#endif
return u8result;
}
UINT8 UNI_SampleElectrode(UINT8 u8ElecNum, UINT8 u8Command)
{
UINT8 u8NSamp;
UINT8 u8ElectrodeStatus;
UINT16 u16CapSubSample;
UINT8 u8FaultCnt;
#if TSS_USE_NOISE_AMPLITUDE_FILTER
INT8 i8AmplitudeFilterDeltaLimitTemp;
UINT16 *pu16AmplitudeFilterBaseTemp;
#endif
if (u8Command == TSS_SAMPLE_COMMAND_RESTART)
{
u8ElectrodeStatus = TSS_SAMPLE_STATUS_PROCESSING;
} else if (u8Command == TSS_SAMPLE_COMMAND_PROCESS)
{
/* Initialization of variables */
tss_u8HWTimerFlag = 0u;
tss_u16CapSample = 0u;
u8ElectrodeStatus = TSS_SAMPLE_STATUS_OK; /* Sets status */
u8FaultCnt = 0u;
u8NSamp = tss_CSSys.NSamples;
#if TSS_USE_NOISE_AMPLITUDE_FILTER
pu16AmplitudeFilterBaseTemp = &(((TSS_GENERIC_ELECTRODE_RAMDATA *) (tss_acp8ElectrodeRAMData[u8ElecNum]))->gen_u16AmplitudeFilterBase);
if (*pu16AmplitudeFilterBaseTemp == 0u) {
i8AmplitudeFilterDeltaLimitTemp = 127;
} else {
i8AmplitudeFilterDeltaLimitTemp = ((TSS_GENERIC_ELECTRODE_ROMDATA *) (tss_acp8ElectrodeROMData[u8ElecNum]))->gen_ci8AmplitudeFilterDeltaLimit;
}
#endif
/* Main oversampling measurement loop */
while(u8NSamp)
{
#if TSS_HW_TIMER_USED
TSS_HW_TIMER_STOP(); /* Stops the HW Timer */
TSS_HW_TIMER_RESET(); /* Resets the HW Timer */
#endif
TSS_CLEAR_SAMPLE_INTERRUPTED_FLAG(); /* Clears the interrupt sample flag */
u16CapSubSample = tss_faSampleElectrodeLow[u8ElecNum](); /* Samples one electrode */
if(!TSS_FAULT_DETECTED) /* Verifies that no fault has occurred */
{
if(!TSS_SAMPLE_INTERRUPTED) /* Verifies that the sample has not been inturrupted*/
{
#if TSS_USE_NOISE_AMPLITUDE_FILTER
if (TSS_u16NoiseAmplitudeFilter(u16CapSubSample, pu16AmplitudeFilterBaseTemp, i8AmplitudeFilterDeltaLimitTemp))
{
u8FaultCnt++;
}
else
{
tss_u16CapSample += u16CapSubSample;
u8NSamp--;
u8FaultCnt = 0u; /* Restart Fault counter due long cyclic interrupts */
}
#else
tss_u16CapSample += u16CapSubSample;
u8NSamp--;
u8FaultCnt = 0u; /* Restart Fault counter due long cyclic interrupts */
#endif
}
else
{
/* Do nothing if interrupt occured and do sample again in next loop*/
u8FaultCnt++;
}
}
else
{
TSS_SET_ELECTRODE_OUTPUT_LOW(); /* Sets the electrode to OUTPUT LOW default value bacause short was detected there */
u8ElectrodeStatus = TSS_SAMPLE_ERROR_CHARGE_TIMEOUT; /* If a fault has occurred sets the return status code error */
u8NSamp = 0u;
}
if(u8FaultCnt >= TSS_FAULT_TIMEOUT) {
u8ElectrodeStatus = TSS_SAMPLE_ERROR_CHARGE_TIMEOUT; /* If a fault has occurred sets the return status code error */
u8NSamp = 0u;
}
}
if ((tss_u16CapSample < TSS_KEYDETECT_CAP_LOWER_LIMIT) && (u8ElectrodeStatus != TSS_SAMPLE_ERROR_CHARGE_TIMEOUT))
{
u8ElectrodeStatus = TSS_SAMPLE_ERROR_SMALL_CAP;
}
#if TSS_USE_NOISE_AMPLITUDE_FILTER
if (u8ElectrodeStatus == TSS_SAMPLE_STATUS_OK) {
if (*pu16AmplitudeFilterBaseTemp == 0u) {
*pu16AmplitudeFilterBaseTemp = (UINT16) (tss_u16CapSample / tss_CSSys.NSamples);
}
} else {
*pu16AmplitudeFilterBaseTemp = 0u; /* Initiate Amplitude Filter Base refresh */
}
#endif
} else if (u8Command == TSS_SAMPLE_COMMAND_GET_NEXT_ELECTRODE)
{
/* Return the same electrode number because there is no more electrodes in the module */
u8ElectrodeStatus = u8ElecNum;
} else if (u8Command == TSS_SAMPLE_COMMAND_RECALIB)
{
/* Do Nothing because the Command is no relevant for GPIO Method */
u8ElectrodeStatus = TSS_SAMPLE_STATUS_OK;
}
return u8ElectrodeStatus; /* Return status code */
}
