//struct {
unsigned int8 firenum=TDC_FIRENUM_0;
unsigned int8 div_fire=TDC_DIV_FIRE_2;
unsigned int8 calresnum=TDC_CALPERIODS_2;
unsigned int8 clkhsdiv=TDC_CLKHSDIV_1;
unsigned int8 start_clkhs=TDC_CLKHS_ON;
unsigned int1 portnum=TDC_TPORTNUM_4;
unsigned int1 Tcycle=TDC_TCYCLE_SHORT;
unsigned int1 fakenum=TDC_TFAKENUM_2;
unsigned int1 selclkT=TDC_TSELCLK_128HS;
unsigned int1 calibrate=TDC_CALIBRATE_EN;
unsigned int1 disautocal=TDC_AUTOCAL_EN;
unsigned int1 MRange=TDC_MRANGE2;
unsigned int1 neg_stop2=TDC_NEG_STOP2;
unsigned int1 neg_stop1=TDC_NEG_STOP1;
unsigned int1 neg_start=TDC_NEG_START;
//}reg0;

//struct {
unsigned int hit2=TDC_MRANGE1_HIT2_NOAC;
unsigned int hit1=TDC_MRANGE1_HIT1_NOAC;
unsigned int1 fast_init=TDC_FAST_INIT_DIS;
unsigned int hitin2=TDC_HITIN2_0;
unsigned int hitin1=TDC_HITIN1_0;
//}reg1;

//struct {
unsigned int en_int=TDC_INT_ALU;
unsigned int1 rfedge2=TDC_CH2EDGE_RIS;
unsigned int1 rfedge1=TDC_CH1EDGE_RIS;
unsigned int32 delval1=0;
//}reg2;

//struct {
unsigned int1 en_err_val=TDC_ERRVAL_DIS;
unsigned int tim0_mr2=TDC_TIM0MR2_16384CLKHS;
unsigned int32 delval2=0;
//}reg3;

//reg4
unsigned int32 delval3=0;

//reg5
unsigned int conf_fire=0;
unsigned int1 en_startnoise=TDC_STARTNOISE_DIS;
unsigned int1 dis_phasenoise=TDC_PHASENOISE_DIS;
unsigned int repeat_fire=TDC_REPEAT_FIRE_0;
unsigned int16 phase_fire=0;

//}TDC_registers;


/*
1 0 0 0 0 ADR2 ADR1 ADR0 Write into address ADR
1 0 1 1 0 ADR2 ADR1 ADR0 Read from address ADR
0 1 1 1 0 0 0 0 Init
0 1 0 1 0 0 0 0 Power On Reset
0 0 0 0 0 0 0 1 Start_Cycle
0 0 0 0 0 0 1 0 Start_Temp
0 0 0 0 0 0 1 1 Start_Cal_Resonator
0 0 0 0 0 1 0 0 Start_Cal_TDC
*/

void TDC_init()
{
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x70,8);
   output_high(TDC_ENABLE);
}

void TDC_reset()
{
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x50,8);
   output_high(TDC_ENABLE);

//reset registers settings to default

firenum=TDC_FIRENUM_0;
div_fire=TDC_DIV_FIRE_2;
calresnum=TDC_CALPERIODS_2;
clkhsdiv=TDC_CLKHSDIV_1;
start_clkhs=TDC_CLKHS_ON;
portnum=TDC_TPORTNUM_4;
Tcycle=TDC_TCYCLE_SHORT;
fakenum=TDC_TFAKENUM_2;
selclkT=TDC_TSELCLK_128HS;
calibrate=TDC_CALIBRATE_EN;
disautocal=TDC_AUTOCAL_EN;
MRange=TDC_MRANGE2;
neg_stop2=TDC_NEG_STOP2;
neg_stop1=TDC_NEG_STOP1;
neg_start=TDC_NEG_START;
hit2=TDC_MRANGE1_HIT2_NOAC;
hit1=TDC_MRANGE1_HIT1_NOAC;
fast_init=TDC_FAST_INIT_DIS;
hitin2=TDC_HITIN2_0;
hitin1=TDC_HITIN1_0;
en_int=TDC_INT_ALU;
rfedge2=TDC_CH2EDGE_RIS;
rfedge1=TDC_CH1EDGE_RIS;
en_err_val=TDC_ERRVAL_DIS;
tim0_mr2=TDC_TIM0MR2_16384CLKHS;
delval1=0;
delval2=0;
delval3=0;
conf_fire=0;
en_startnoise=TDC_STARTNOISE_DIS;
dis_phasenoise=TDC_PHASENOISE_DIS;
repeat_fire=TDC_REPEAT_FIRE_0;
phase_fire=0;
}

void TDC_start_cycle()
{
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x01,8);
   output_high(TDC_ENABLE);
}

void TDC_start_temp()
{
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x02,8);
   output_high(TDC_ENABLE);
}

void TDC_start_cal_resonator()
{
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x03,8);
   output_high(TDC_ENABLE);
}

void TDC_start_cal()
{
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x04,8);
   output_high(TDC_ENABLE);
}

unsigned int32 TDC_get_measurement(int num)
{
unsigned int32 ret=0;

   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0xB0 + num - 1, 8);
   ret=spi_xfer(TDC_stream,0,32);
   output_high(TDC_ENABLE);
   return ret;
}

unsigned int16 TDC_get_status()
{
unsigned int16 ret;

   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0xB4,8);
   ret=spi_xfer(TDC_stream,0,16);
   output_high(TDC_ENABLE);
   return ret;
}

unsigned int8 TDC_get_reg1()
{
unsigned int8 ret;

   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0xB5,8);
   ret=spi_xfer(TDC_stream,0,8);
   output_high(TDC_ENABLE);
   return ret;
}

void TDC_update_reg1()  // updates reg1 only 
{
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x81,8);
   spi_xfer(TDC_stream,hit2,4);   
   spi_xfer(TDC_stream,hit1,4);   
   spi_xfer(TDC_stream,fast_init,1);   
   spi_xfer(TDC_stream,1,1);   
   spi_xfer(TDC_stream,hitin2,3);   
   spi_xfer(TDC_stream,hitin1,3);   
   spi_xfer(TDC_stream,0,8);   
   output_high(TDC_ENABLE);
}

void TDC_update_registers()
{
//update reg0
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x80,8);
   spi_xfer(TDC_stream,firenum,4);   
   spi_xfer(TDC_stream,div_fire,4);   
   spi_xfer(TDC_stream,calresnum,2);   
   spi_xfer(TDC_stream,clkhsdiv,2);   
   spi_xfer(TDC_stream,start_clkhs,2);
   spi_xfer(TDC_stream,portnum,1);   
   spi_xfer(TDC_stream,Tcycle,1);   
   spi_xfer(TDC_stream,fakenum,1);   
   spi_xfer(TDC_stream,selclkT,1);   
   spi_xfer(TDC_stream,calibrate,1);   
   spi_xfer(TDC_stream,disautocal,1);   
   spi_xfer(TDC_stream,MRange,1);   
   spi_xfer(TDC_stream,neg_stop2,1);
   spi_xfer(TDC_stream,neg_stop1,1);   
   spi_xfer(TDC_stream,neg_start,1);   
   output_high(TDC_ENABLE);

   TDC_update_reg1();             // update reg1

// update reg2
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x82);
   spi_xfer(TDC_stream,en_int,3);   
   spi_xfer(TDC_stream,rfedge2,1);   
   spi_xfer(TDC_stream,rfedge1,1);
   spi_xfer(TDC_stream,delval1,19);   
   output_high(TDC_ENABLE);

// update reg3
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x83);
   spi_xfer(TDC_stream,0,2);
   spi_xfer(TDC_stream,en_err_val,1);   
   spi_xfer(TDC_stream,tim0_mr2,2);   
   spi_xfer(TDC_stream,delval2,19);   
   output_high(TDC_ENABLE);

// update reg4
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x84);
   spi_xfer(TDC_stream,0b00100,5);   
   spi_xfer(TDC_stream,delval3,19);   
   output_high(TDC_ENABLE);

// update reg5
   output_low(TDC_ENABLE);
   spi_xfer(TDC_stream,0x85);
   spi_xfer(TDC_stream,conf_fire,3);   
   spi_xfer(TDC_stream,en_startnoise,1);   
   spi_xfer(TDC_stream,dis_phasenoise,1);   
   spi_xfer(TDC_stream,repeat_fire,3);   
   spi_xfer(TDC_stream,phase_fire,16);   
   output_high(TDC_ENABLE);
}

float TDC_mrange2_get_time(unsigned int shot)      // read start to stop time distance of desired shot
{
unsigned int32 measurement;
float time;

   switch (shot)     // determine which shot is desired to compute
   {
     case 1:
               hit2=TDC_MRANGE2_HIT2_1CH1;
               break;

     case 2:
               hit2=TDC_MRANGE2_HIT2_2CH1;
               break;

     case 3:
               hit2=TDC_MRANGE2_HIT2_3CH1;
               break;
   }
   TDC_update_reg1();      // tell  ALU which shot period must be computed
   
   Delay_ms(50);     // wait to computing of result
   
   measurement=TDC_get_measurement(7&TDC_get_status()); // read computed value on pointer result register address
   

   switch (clkhsdiv)    // calibrate measurement data to microseconds from known register setting 
   {
     case TDC_CLKHSDIV_1:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS;
               break;

     case TDC_CLKHSDIV_2:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS * 2.0;
               break;

     case TDC_CLKHSDIV_4:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS * 4.0;
               break;
     case TDC_CLKHSDIV_8:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS * 8.0;
               break;
   }
   return time;
}

float TDC_mrange1_get_time(unsigned int channel1, unsigned int shot1, unsigned int channel2, unsigned int shot2)
{
unsigned int32 measurement;
float time;

   switch (shot1)
   {
     case 0:
               hit1=TDC_MRANGE1_HIT1_START;
               break;
     case 1:
               if (channel1 == 1) hit1=TDC_MRANGE1_HIT1_1CH1; else hit1=TDC_MRANGE1_HIT1_1CH2;
               break;

     case 2:
               if (channel1 == 1) hit1=TDC_MRANGE1_HIT1_2CH1; else hit1=TDC_MRANGE1_HIT1_2CH2;
               break;

     case 3:
               if (channel1 == 1) hit1=TDC_MRANGE1_HIT1_3CH1; else hit1=TDC_MRANGE1_HIT1_3CH2;
               break;

     case 4:
               if (channel1 == 1) hit1=TDC_MRANGE1_HIT1_4CH1; else hit1=TDC_MRANGE1_HIT1_4CH2;
               break;
   }

   switch (shot2)
   {
     case 0:
               hit2=TDC_MRANGE1_HIT2_START;
               break;

     case 1:
               if (channel2 == 1) hit2=TDC_MRANGE1_HIT2_1CH1; else hit2=TDC_MRANGE1_HIT2_1CH2;
               break;

     case 2:
               if (channel2 == 1)  hit2=TDC_MRANGE1_HIT2_2CH1; else hit2=TDC_MRANGE1_HIT2_2CH2;
               break;

     case 3:
               if (channel2 == 1)  hit2=TDC_MRANGE1_HIT2_3CH1; else hit2=TDC_MRANGE1_HIT2_3CH2;
               break;

     case 4:
               if (channel2 == 1)  hit2=TDC_MRANGE1_HIT2_4CH1; else hit2=TDC_MRANGE1_HIT2_4CH2;
               break;
   }

   TDC_update_reg1();      // tell  to ALU which shot period must be computed
   
   Delay_ms(50);     // wait to computing of result
   
   measurement=TDC_get_measurement(7&TDC_get_status()); // read computed value on pointer result register address
   

   switch (clkhsdiv)
   {
     case TDC_CLKHSDIV_1:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS;
               break;

     case TDC_CLKHSDIV_2:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS * 2.0;
               break;

     case TDC_CLKHSDIV_4:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS * 4.0;
               break;
     case TDC_CLKHSDIV_8:
               time=(measurement/65536.0) * 1.0e6/TDC_CLKHS * 8.0;
               break;
   }
   return time;
}