spi.h

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#ifndef SPI_H_
#define SPI_H_

#include <avr/io.h>
#include <stdbool.h>
#include "uart.h"

#define DACPORT     PORTB
#define DACCSPIN    3
#define ADCPORT     PORTB
#define ADCCSPIN    4

extern uint64_t ahRaw;
extern uint32_t ahCnt;
extern uint32_t ahTickCnt;

extern void SPIInit(void);
extern void     DACSetRaw(uint16_t value);
extern void     DACSetAmps(double i);
extern void     DACSetAmpsByStr(char *str);
extern void     SpiGetADC(void);
extern void     SpiGetADC2(void);   
extern double   ADCGetIavg(void);
extern double   ADCGetIByVal(uint16_t iRaw, bool isHigh);
extern double   ADCGetAs(void);
extern double   ADCGetVavg(void);
extern uint8_t  SpiSendAndReceiveByte(uint8_t b);
void CalcIMaxLookupTable(void);
extern uint16_t derating;
extern uint16_t soaIMaxLUT[128];

typedef struct
{
    uint16_t    V;      
    uint16_t    Ilow;   
    uint16_t    Ihigh;  
} SPIADCData_t;

typedef struct  
{
    union  {
        struct {
        SPIADCData_t    SPIADCData;
        uint8_t dummy;  
        uint8_t     LED;    
        uint16_t    DAC; 
        uint8_t     DAC_CMD;
        } named;
        char    array[11];
    } data;
}ADC_RcvStruct_t;

typedef struct  
{
    union  {
        struct {
            const char ADCCmd[7];
            uint8_t     LED;    
            uint16_t    DAC; 
            uint8_t     DAC_CMD;    
        } named;
        char    array[11];
    } data;
}SPI_XmtStruct_t;

extern volatile ADC_RcvStruct_t ADC_RcvStruct;
extern volatile SPIADCData_t    SPIADCAvg;

static inline bool  SPIADCBusy(void)
{
    return (ADCPORT&(1<<ADCCSPIN))==0;
}

static inline void SpiSelectDAC(void)
{
    DACPORT &= ~(1<<DACCSPIN);
}

static inline void SPIDeselectDAC(void)
{
    DACPORT|=(1<<DACCSPIN);
}

static inline void SpiSelectADC(void)
{
    ADCPORT &= ~(1<<ADCCSPIN);
}

static inline void SPIDeselectADC(void)
{
    ADCPORT|=(1<<ADCCSPIN);
}

static inline bool IsHighCurrentMode(void)
{
    bool    isHigh=(PORTD & 0b00000100)!=0;
//  hprintf_P(PSTR("IsHigh: %d\n"),isHigh);
    return (isHigh);
}

extern void SPISetLEDs(uint8_t mask);
extern void SetLowCurrentMode(void);
extern void SetHighCurrentMode(void);
extern uint16_t ADCGetIhighLifeRaw();
extern uint16_t ADCGetIlowLifeRaw();
extern uint16_t ADCGetVLifeRaw();
extern uint16_t ADCGetIHighAvgRaw();
extern uint16_t ADCGetILowAvgRaw();
extern uint16_t ADCGetVAvgRaw();
extern void CalcRChannel(void);

#endif /* SPI_H_ */