ADC_SetCal.txt

[8:25 PM] jdolan-acces: How do I go about testing SetCal()?
May 25, 2021
[9:31 AM] JohnHentges-ACCESIO: If you call "ADC_SetCal(":NONE:"),  acquire one scan of all channels with at least one of them grounded, call ADC_SetCal(":AUTO:") and acquire a second scan, the second scan should show a better zero for the grounded channel than the first






//Makes use of a ChunkSize which is based off of the speed of the port the device
//is connected to
ADC_SetCal()

  const
    LoRefRef = 0      * 6553.6;
    HiRefRef = 9.9339 * 6553.6;


  Does device validation, check bADC bulk, check results of read AUR_PROBE_CALFEATURE
  Reads config from board and saves it.
  //if else if on :AUTO:, :NORM:, :1TO1:, :NONE:, <filename>
  if ":AUTO:"
    Initialize low ref and high ref and dref
    create modified config config[0x10] = 0x05, and config[0] = 0x01
    For loop of 0 to 1 (i)
      Initialize cal table ==> uint16[0x10000] where value = index
      DoLoadCalTable()
      config[$11] := $04; //scan software-start
      config[$12] := $00; //select 1 channel
      config[$13] := Min($FF, ChunkSize-1); //Max oversample the FX2 can buffer at once
      ThisRef = HiRef
      if first time through loop (i == 0)
        ThisRef := 1/2 * (ThisRef + $10000);
      config[0x10] |= 0x02; //cal low ref
      HiRead = ConfigureAndBulkAcquire() //configures the board and reads one channel
      if abs(HiRead - ThisRef) > 0x1000 then return ERROR_INVALID_DATA
      sleep(10ms);
      ThisRef = LoRef
      if first time through loop (i == o)
        ThisRef = 1/2 * (ThisRef + $10000);
      config[0x10] &= ~0x02;
      LoRead = ConfigureAndBulkAcquire() //configures the board and reads one channel
      if abs (LoRead - ThisRef) > 0x100 then return ERROR_INVALID_DATA
      sleep(10ms)

      dRead = HiRead - LoRead

      for loop 0 to 0x10000 (j)
        F = (j LoRead) / dRead;
        F = (LoRef +  F * dRef)
        if (i == 0) F = 1/2 * (F + 0x10000)
        J = Round(F)
        if (J <= 0) J = 0;
        if (J >= 0xFFFF) J = 0xFFFF
        CalTable[j] = J

      DoLoadCalTable();

      config[0x10] = 1;
      config[0] = 1;

    WriteCalTableToFile() //if user provided a filename

  else if ":NORM:"
    Initialize low ref, high ref, dref, LoRead, HiRead, and dRead


    for loop 0 to 0x10000 (i)
      F = ( i - LoRead) / dRead
      F = LoRef + F * dRef
      J = Round(F);
      if (J <= 0) J = 0
      if (J >= 0xFFFF) J = 0xFFFF
      CalTable[i] = J

    config[0x10] = 0x05

    for loop 0 to 1 (i)
      ADCSetconfig(config)
      DoLoadCalTable()
      WriteCalTableToFile() //if user provided a filename
      config[0x10] = 0x01

  else if ":1to1" or ":NONE:"
    Initialize cal table ==> uint16[0x10000] where value = index
    config[0x10] = 0x05

    for loop 0 to 1 (i)
      ADCSetconfig(config)
      DoLoadCalTable()
      WriteCalTableToFile() //if user provided a filename
      config[0x10] = 0x01
    
  elsif filename starts with ':'
    error out because of unknown mode

  else it is a filename

    open the file and check Length

    if Length >= 0x20000 //"double" cal file
      config[0x10] = 0x05
      config[0x00] = 0x01

      for loop 0 to 1 (i)
        ADCSetconfig()
        ReadCalTableFromFile()
        DoLoadCalTable()
        WriteCalTableToFile() //if user provided a filename
        config[0x10] = 0x01
        config[0x00] = 0x00

    else if Length >= 0x10000
      ReadCalTableFromFile
      DoLoadCalTable()
      WriteCalTableToFile() //if user provided a filename
    else
      return error (EOF?)