B4R Question (NOT SOLVED no way...)SD and USBFAT library incompatibility.

tigrot

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Longtime User
Hi Everybody!
Just 10 or more years since I used C++ last time. Now I have this issue. I have to use SD library(the one wrapped in B4R) and USB-host. The first to read/write SD and the second for USB memory stick.
This is my code:
B4X: 
Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'Public variables can be accessed from all modules.
    Public Serial1 As Serial
    Dim timer1 As Timer
    Dim y=2017,m=11,d=25,hh=13,mm=23,ss=00 As Int ' date and time fields with init time.
    Dim rtcres As Boolean ' result of native code calls (true=OK)
    Dim sd As SD
    Public buffer(200) As Byte
    Public raf As RandomAccessFile
End Sub

Private Sub AppStart
    Serial1.Initialize(115200)
    Log("AppStart")
    sd.Initialize(10)
    If sd.Exists("/")=False Then
        Log("Nessuna scheda")
    End If
    For Each f As File In sd.ListFiles("/")
        Log(f.Name, TAB, Round(f.Size / 1024), "kb", TAB, f.IsDirectory)
        sd.OpenRead(f.name)
        Log("Lunghezza:")
        Log( sd.CurrentFile.Size)
        sd.Stream.ReadBytes(buffer, 0, buffer.Length)
        raf.CurrentPosition = 0
        'read the data from the buffer
        Log(buffer)
        sd.close
    Next
End Sub
#if C

#include <DS1307RTC.h>
#include <Time.h>
#include <Wire.h>
#include <TimeLib.h>
#include <SPI.h>
#include <UsbFat.h>
#include <masstorage.h>

void print2digits(int number) {
  if (number >= 0 && number < 10) {
    Serial.write('0');
  }
  Serial.print(number);
}  

void setRTC(B4R::Object* bho)
{
  tmElements_t tm;
  int Hour, Min, Sec;
  int Month;
  int Day, Year;
  //Serial.print("Start:");
 
 // if (Month>12 || Month==0) return false;
  tm.Hour = b4r_main::_hh;
  tm.Minute = b4r_main::_mm;
  tm.Second = b4r_main::_ss;
  tm.Day = b4r_main::_d;
  tm.Month = b4r_main::_m;
/*
  Serial.print("Written Time = ");
  print2digits(tm.Hour);
  Serial.write(':');
  print2digits(tm.Minute);
  Serial.write(':');
  print2digits(tm.Second);
  Serial.print(", Date (D/M/Y) = ");
  Serial.print(tm.Day);
  Serial.write('/');
  Serial.print(tm.Month);
  Serial.write('/');
  Serial.print(b4r_main::_y);
  Serial.println();
*/
  tm.Year = CalendarYrToTm(b4r_main::_y);

  bool res=RTC.write(tm);
  b4r_main::_rtcres=res;
  return res;
}


void read(B4R::Object* unused) {
  tmElements_t tm;
  if (RTC.read(tm)) {
    /*
    Serial.print("Ok, Time = ");
    print2digits(tm.Hour);
    Serial.write(':');
    print2digits(tm.Minute);
    Serial.write(':');
    print2digits(tm.Second);
    Serial.print(", Date (D/M/Y) = ");
    Serial.print(tm.Day);
    Serial.write('/');
    Serial.print(tm.Month);
    Serial.write('/');
    Serial.print(tmYearToCalendar(tm.Year));
    Serial.println();
   */
    b4r_main::_hh=tm.Hour;
    b4r_main::_mm=tm.Minute;
    b4r_main::_ss=tm.Second;
    b4r_main::_d=tm.Day;
    b4r_main::_m=tm.Month;
    b4r_main::_y=tmYearToCalendar(tm.Year);
    b4r_main::_rtcres=true;
    return true;
  } else {
    if (RTC.chipPresent()) {
      Serial.println("The DS1307 is stopped.  Running SetTime");
     
      Serial.println();
      b4r_main::_rtcres=false;
      return false;
    } else {
      Serial.println("DS1307 read error!  Please check the circuitry.");
      Serial.println();
      b4r_main::_rtcres=false;
      return false;  
    }
    delay(9000);
  }
  delay(1000);
}


// USB host objects.
USB usb;
BulkOnly bulk(&usb);

// File system.
UsbFat key(&bulk);

// Test file.
File file;

//---------Inizializza USB
void setupx() {

  Serial.print(F("FreeRam "));
  Serial.println(FreeRam());
  Serial.println(F("Type any character to begin"));
  while (Serial.read() < 0) {}
 
  // Initialize the USB bus.
  if (!initUSB(&usb)) {
    Serial.println(F("initUSB failed"));
    return;  
  }
  // Init the USB key or USB hard drive.
  if (!key.begin()) {
    Serial.println(F("key.begin failed"));
    return;
  }
  Serial.print(F("\r\nVolume Size: "));
  // Avoid 32-bit overflow for large volumes.
  Serial.print((key.volumeBlockCount()/1000)*512/1000);
  Serial.println(F(" MB"));
 
  // Print a line to a test file.
  file.open("test file.txt", O_CREAT | O_RDWR);
  file.println("Hello USB");
  file.close();
 
  // List the files in the root directory.
  Serial.println();
  key.ls(LS_A | LS_DATE | LS_SIZE);
  Serial.println();
 
  Serial.println(F("Done"));
}

#end if
The two sketches compile well if it's done separatelly, when I put together I get this long list of errors, because FAT's structures are redefined in SD and USB libraries.

Of course I could redefine the constants and data types, but it's possible to void this kind of error? It's first time I happen!

Thank You

Mauro
 
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Cableguy

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Are you using a single device? Could a 2 device approach, using maybe I2C, be useful?
 
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tigrot

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The issue is not in fisical device handling, but in fat handling. The creator has redefined FAT and FAT16 structures, so it's almost impossible to compile using a mix of SD and USB flash. I'm thinking to switch to Vinculum FTDI solution, using a two ports module. One of them will keep the local data(for a data logging) and one will have a removable USB flash, to extract data and elaborate it, keeping the logger running, while performing the task.
I have seen many solutions, but using dos compatible filesystem is a must.
Do you have some hint for me?
Thank you!
Mauro
 
Last edited:
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Cableguy

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DO you really need it to be "arduino"? reading you I would go with a Pi, even a zero, would allow you to use so many different approaches...
 
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tigrot

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Of course: Orange Pi was my first chose. I have used Unix, Xenix and Linux from the beginning, but the logger must be powered from a weak power supply(a food metal detector, a project of mine). I have only 400ma left to me, before the detector will come unstable.
 
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tigrot

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Got it! I have 5v at 400ma. I can drive a UNO + a 4x20 LCD + RS232 voltage shifter.
Tomorrow I'll order a Zero, which has SD and Host USB on board. And it costs less than the full bundle of arduino Shields!
web-it-out
Click to expand...
The food factories are not willing to show the results of their tests. Better to keep secret! http://www.metaldetectorcoel.it/ that's my project, started in late '90.
 
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Cableguy

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by web-it-out I meant that you could export the results instead of logging in USB... that way, you could have a "sensor-network" logging into a central device
 
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Cableguy

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tigrot said:
In normal case it is so, but I cannot use BT or WI-FI. They disturb coils. And make unstable an already unstable device!
Thank you guys(and ladies).
Click to expand...
then be sure to NOT order the Zero-W versions as it comes with Bluetooth and Wifi built-in

You're welcome sir, just trying to help, but I mostly just get people even more confused...
 
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tigrot

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Longtime User
Cableguy said:
then be sure to NOT order the Zero-W versions as it comes with Bluetooth and Wifi built-in
Click to expand...
Hi Cableguy, is Rasberry safe in this environment?
I need to switch off power and cannot switch module before. Need to write SD, open/write/close file. It's not a large number of data. I have the feeling that the SD may corrupt in a few months.
Ciao
Mauro
 
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Cableguy

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You have the orange equivalents or banana's that have MMC so SD corruption shouldn't be a problem, also has sata connection
 
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