i am using clrc663 for card reader i implement lpcd mode there i am facing issue there lpcd calibration function i run i getting i and q value is 0x00 i am getting from antenna what is the issue how to i solve this
this function i am using
/* Perform LPCD Calibration */
phStatus_t Calibrate_LPCD(uint32_t dwLPCDDemo, uint32_t *pdwLPCDRefValue)
{
phStatus_t wStatus;
uint8_t bValueI = 0;
uint8_t bValueQ = 0;
uint8_t bVersion = 0;
uint8_t bDigitalFilter = PH_ON;
uint16_t wDetectionOption = PHHAL_HW_RC663_FILTER_OPTION1;
uint16_t wPowerDownTimeMs = LPCD_POWERDOWN_TIME;
uint16_t wDetectionTimeUs = LPCD_FIELD_ON_DURATION;
DEBUG_PRINTF("\nLPCD Calibration Starts. ");
phhalHw_FieldOn(pHal);
phhalHw_Wait(pHal, PHHAL_HW_TIME_MILLISECONDS, 5);
/* Configure the LPCD Mode Default to perform LPCD Calibration cycle.
* Provide Input Reference I and Q value of Zero and provide the Detection time to
* turn ON RF for this duration to measure the Load change using I and Q Channel Values.
* Configure suitable Power Down time to save power consumed by RC663 Reader IC. */
wStatus = phhalHw_Rc663_Cmd_Lpcd_SetConfig(pHal, PHHAL_HW_RC663_CMD_LPCD_MODE_DEFAULT,
bValueI, bValueQ, wPowerDownTimeMs, wDetectionTimeUs);
CHECK_STATUS(wStatus);
DEBUG_PRINTF("\nphhalHw_Rc663_Cmd_Lpcd_SetConfig. ");
/* Read the Version register to differentiate between RC663 Old(RC66301, RC66302) and RC663 Plus (RC66303). */
wStatus = phhalHw_Rc663_ReadRegister(pHal, PHHAL_HW_RC663_REG_VERSION, &bVersion);
DEBUG_PRINTF("\nphhalHw_Rc663_ReadRegister. ");
CHECK_STATUS(wStatus);
if (bVersion == PHHAL_HW_CLRC663PLUS_VERSION)
{
/* Configure the Charge Pump to have high detection range.
* Enabling the charge pump increases the power level during the detection phase increasing
* the detection range. This leads to increase in average current consumption. */
wStatus = phhalHw_SetConfig(pHal, PHHAL_HW_RC663_CONFIG_LPCD_CHARGEPUMP, PH_ON);
CHECK_STATUS(wStatus);
DEBUG_PRINTF("\nphhalHw_SetConfig. ");
/* Configuring the Digital Filter triggers the RC663 Plus algorithm to get average of multiple
* samples to detect change in I and Q values. This increases the RF ON time duration in turn
* increasing the average current consumption. */
wStatus = phhalHw_SetConfig(pHal, PHHAL_HW_RC663_CONFIG_LPCD_FILTER,
((uint16_t)(bDigitalFilter) | wDetectionOption));
CHECK_STATUS(wStatus);
}
/* Perform LPCD Calibration cycle and get the LPCD reference I and Q Values. */
wStatus = phhalHw_Rc663_Cmd_Lpcd_GetConfig(pHal, &bValueI, &bValueQ);
DEBUG_PRINTF("\nphhalHw_Rc663_Cmd_Lpcd_GetConfig. ");
CHECK_STATUS(wStatus);
*pdwLPCDRefValue = ((bValueI) | (bValueQ << 0x8));
DEBUG_PRINTF("\npdwLPCDRefValue. ");
DEBUG_PRINTF("\nLPCD Calibration Successful. ");
return PH_ERR_SUCCESS;
} then i called in main while loop
/* ------------------------------------------------------------------
* Run LPCD calibration once after power-up
* ------------------------------------------------------------------ */
phStatus_t LPCD_Calibrate(void)
{
phStatus_t status;
uint32_t refVal;
char dbg_buf[64];
// Ensure RF ON before calibration
phhalHw_FieldOn(pHal);
phhalHw_Wait(pHal, PHHAL_HW_TIME_MILLISECONDS, 5);
status = Calibrate_LPCD(LPCD_DEMO_MODE_DEFAULT, &refVal);
// Turn RF off after calibration
phhalHw_FieldOff(pHal);
if (status == PH_ERR_SUCCESS)
{
gLpcdValueI = (uint8_t)(refVal & 0xFF);
gLpcdValueQ = (uint8_t)((refVal >> & 0xFF);
gLpcdCalibrated = 1;
sprintf(dbg_buf, "LPCD Calibration OK (I=0x%02X, Q=0x%02X)\r\n",
gLpcdValueI, gLpcdValueQ);
DEBUG_UART2((unsigned char*)dbg_buf, strlen(dbg_buf));
}
else
{
DEBUG_UART2((unsigned char*)"LPCD Calibration FAILED\r\n", 28);
}
return status;
}
if (!lpcdCalibrated)
{
if (LPCD_Calibrate() == PH_ERR_SUCCESS)
{
lpcdCalibrated = 1; // mark as done
DEBUG_UART2((unsigned char*)"LPCD Calibration OK\r\n", 23);
}
else
{
DEBUG_UART2((unsigned char*)"LPCD Calibration FAILED\r\n", 28);
}
}
