81 lines
4.3 KiB
C
81 lines
4.3 KiB
C
// File: Impedance.h
|
|
#ifndef _IMPEDANCESEQUENCES_H_
|
|
#define _IMPEDANCESEQUENCES_H_
|
|
#include "ad5940.h"
|
|
#include <stdio.h>
|
|
#include "string.h"
|
|
#include "math.h"
|
|
|
|
// Define custom error code for FIFO overflow
|
|
#define AD5940ERR_FIFO 20
|
|
|
|
typedef struct
|
|
{
|
|
/* Common configurations for all kinds of Application. */
|
|
BoolFlag bParaChanged; /* Indicate to generate sequence again. It's auto cleared by AppBIAInit */
|
|
uint32_t SeqStartAddr; /* Initialaztion sequence start address in SRAM of AD5940 */
|
|
uint32_t MaxSeqLen; /* Limit the maximum sequence. */
|
|
uint32_t SeqStartAddrCal; /* Measurement sequence start address in SRAM of AD5940 */
|
|
uint32_t SeqWaitAddr[3]; /* Addresses of the Wait commands in the sequence, used to update delays for frequency changes */
|
|
uint32_t MaxSeqLenCal;
|
|
/* Application related parameters */
|
|
float ImpODR; /* */
|
|
int32_t NumOfData; /* By default it's '-1'. If you want the engine stops after get NumofData, then set the value here. Otherwise, set it to '-1' which means never stop. */
|
|
int32_t RealDataCount; /* Actual number of valid points to report to host (used for dummy point filtering) */
|
|
float WuptClkFreq; /* The clock frequency of Wakeup Timer in Hz. Typically it's 32kHz. Leave it here in case we calibrate clock in software method */
|
|
float SysClkFreq; /* The real frequency of system clock */
|
|
float AdcClkFreq; /* The real frequency of ADC clock */
|
|
float RcalVal; /* Rcal value in Ohm */
|
|
float RtiaVal; /* Rtia value in Ohm (used for 4-wire calculation) */
|
|
/* Switch Configuration */
|
|
uint32_t DswitchSel;
|
|
uint32_t PswitchSel;
|
|
uint32_t NswitchSel;
|
|
uint32_t TswitchSel;
|
|
uint32_t PwrMod; /* Control Chip power mode(LP/HP) */
|
|
uint32_t HstiaRtiaSel; /* Use internal RTIA, select from RTIA_INT_200, RTIA_INT_1K, RTIA_INT_5K, RTIA_INT_10K, RTIA_INT_20K, RTIA_INT_40K, RTIA_INT_80K, RTIA_INT_160K */
|
|
uint32_t ExtRtia; /* External RTIA switch control/value */
|
|
uint32_t ExcitBufGain; /* Select from EXCTBUFGAIN_2, EXCTBUFGAIN_0P25 */
|
|
uint32_t HsDacGain; /* Select from HSDACGAIN_1, HSDACGAIN_0P2 */
|
|
uint32_t HsDacUpdateRate;
|
|
float DacVoltPP; /* DAC output voltage in mV peak to peak. Maximum value is 800mVpp. Peak to peak voltage */
|
|
float BiasVolt; /* The excitation signal is DC+AC. This parameter decides the DC value in mV unit. 0.0mV means no DC bias.*/
|
|
float SinFreq; /* Frequency of excitation signal */
|
|
uint32_t DftNum; /* DFT number */
|
|
uint32_t DftSrc; /* DFT Source */
|
|
BoolFlag HanWinEn; /* Enable Hanning window */
|
|
uint32_t AdcPgaGain; /* PGA Gain select from GNPGA_1, GNPGA_1_5, GNPGA_2, GNPGA_4, GNPGA_9 !!! We must ensure signal is in range of +-1.5V which is limited by ADC input stage */
|
|
uint8_t ADCSinc3Osr;
|
|
uint8_t ADCSinc2Osr;
|
|
uint8_t ADCAvgNum;
|
|
/* Sweep Function Control */
|
|
SoftSweepCfg_Type SweepCfg;
|
|
uint32_t FifoThresh; /* FIFO threshold. Should be N*4 */
|
|
/* Private variables for internal usage */
|
|
float SweepCurrFreq;
|
|
float SweepNextFreq;
|
|
float FreqofData; /* The frequency of latest data sampled */
|
|
BoolFlag IMPInited; /* If the program run firstly, generated sequence commands */
|
|
SEQInfo_Type InitSeqInfo;
|
|
SEQInfo_Type MeasureSeqInfo;
|
|
BoolFlag StopRequired; /* After FIFO is ready, stop the measurement sequence */
|
|
uint32_t FifoDataCount; /* Count how many times impedance have been measured */
|
|
BoolFlag ShortRe0Se0; /* Short RE0 to SE0 */
|
|
}AppIMPCfg_Type;
|
|
|
|
#define IMPCTRL_START 0
|
|
#define IMPCTRL_STOPNOW 1
|
|
#define IMPCTRL_STOPSYNC 2
|
|
#define IMPCTRL_GETFREQ 3 /* Get Current frequency of returned data from ISR */
|
|
#define IMPCTRL_SHUTDOWN 4 /* Note: shutdown here means turn off everything and put AFE to hibernate mode. The word 'SHUT DOWN' is only used here. */
|
|
|
|
int32_t AppIMPInit(uint32_t *pBuffer, uint32_t BufferSize);
|
|
int32_t AppIMPGetCfg(void *pCfg);
|
|
int32_t AppIMPISR(void *pBuff, uint32_t *pCount);
|
|
int32_t AppIMPCtrl(uint32_t Command, void *pPara);
|
|
|
|
/* Helper Routines */
|
|
void AppIMPCleanup(void);
|
|
void AppIMPCalibrateLFO(void);
|
|
|
|
#endif |