(* Analog Input Test using libsimpleio *)

(* Copyright (C)2024, Philip Munts dba Munts Technologies.                     *)
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(* modification, are permitted provided that the following conditions are met: *)
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MODULE test_adc;

IMPORT ADC_libsimpleio, Channel;

FROM STextIO       IMPORT WriteString, WriteLn, SkipLine;
FROM SRealIO       IMPORT ReadReal, WriteFixed;
FROM SWholeIO      IMPORT ReadCard;
FROM FIO           IMPORT FlushOutErr;

FROM ErrorHandling IMPORT CheckError;
FROM libc          IMPORT sleep;

VAR
  desg   : Channel.Designator;
  res    : CARDINAL;
  Vref   : REAL;
  inp    : ADC_libsimpleio.Input;
  error  : CARDINAL;
  V      : REAL;

BEGIN
  WriteLn;
  WriteString("Analog Input Test using libsimpleio");
  WriteLn;
  WriteLn;
  FlushOutErr;

  desg := Channel.GetDesignator2("Enter A/D converter");

  WriteString("Enter A/D converter resolution (bits): ");
  ReadCard(res);
  SkipLine;

  WriteString("Enter A/D converter reference (volts): ");
  ReadReal(Vref);
  SkipLine;
  WriteLn;
  FlushOutErr;

  (* Open analog input *)

  ADC_libsimpleio.Open(desg, res, Vref, inp, error);
  CheckError(error, "ADC_libsimpleio.Open() failed");

  WriteString("Press CONTROL-C to exit");
  WriteLn;
  WriteLn;
  FlushOutErr;

  LOOP
    ADC_libsimpleio.ReadVolts(inp, V, error);
    CheckError(error, "ADC_libsimpleio.ReadVolts() failed");

    WriteFixed(V, 2, 4);
    WriteString(" V");
    WriteLn;
    FlushOutErr;
    sleep(1);
  END;

END test_adc.