arduino due and bar code reader

Projects Programming
1

I need a source code language Arduino programming software to read the codes of a bar code reader with arduino due and display has an LCD display.
thx.

2

a bar code reader

Can you please give us a clue as to which reader you have in mind ?

3

leuze electronic
IT 1900g SR-2

4

should we assume that you have at lrast the lcd part working already?

it is just a standard type with 4-7 data lines or is it the i2c type ?
getting these lcd to work is easy and is very educational....

dan

5

the bar code reader does not work and the LCD part does not work as.
the lcd is a standard type with 4-7 data lines.

6

my main problem is the communication between Arduino due and the bar code reader.

7

The barcode reader looks like it uses USB. How have you got it connected to the Arduino ?

Please post your code that does not work but read this before posting a programming question

8

Does the barcode reader have a serial option?

I've used two different USB HID type barcode readers with microcontrollers. I had to make my own cable but it wasn't hard to do this.

There's some more information about converting USB barcode readers to TTL output in this Parallax forum post.

9

this is my source code

#include <LiquidCrystal.h>
#include <avr/pgmspace.h>

#include <hid.h>
#include <hiduniversal.h>

#include <Usb.h>
#include <usbhub.h>
#include <avr/pgmspace.h>

#include <hidboot.h>

#define DISPLAY_WIDTH 16

// initialize the LCD library with the numbers of the interface pins
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

USB Usb;
USBHub Hub(&Usb);
HIDUniversal Hid(&Usb);
HIDBoot<HID_PROTOCOL_KEYBOARD> Keyboard(&Usb);

class KbdRptParser : public KeyboardReportParser
{
void PrintKey(uint8_t mod, uint8_t key);
protected:
virtual void OnKeyDown (uint8_t mod, uint8_t key);
virtual void OnKeyPressed(uint8_t key);
};

void KbdRptParser::OnKeyDown(uint8_t mod, uint8_t key)
{
uint8_t c = OemToAscii(mod, key);

if (c)
OnKeyPressed(c);
}

/* what to do when symbol arrives */
void KbdRptParser::OnKeyPressed(uint8_t key)
{
static uint32_t next_time = 0; //watchdog
static uint8_t current_cursor = 0; //tracks current cursor position

if( millis() > next_time ) {
lcd.clear();
current_cursor = 0;
delay( 5 ); //LCD-specific
lcd.setCursor( 0,0 );
}//if( millis() > next_time ...

next_time = millis() + 200; //reset watchdog

if( current_cursor++ == ( DISPLAY_WIDTH + 1 )) { //switch to second line if cursor outside the screen
lcd.setCursor( 0,1 );
}

Serial.println(char) key );
lcd.print(char)key );
};

KbdRptParser Prs;

void setup()
{
Serial.begin( 115200 );
Serial.println("Start");

if (Usb.Init() == -1) {
Serial.println("OSC did not start.");
}

delay( 200 );

Hid.SetReportParser(0, (HIDReportParser*)&Prs);
// set up the LCD's number of columns and rows:
lcd.begin(DISPLAY_WIDTH, 2);
lcd.clear();
lcd.noAutoscroll();
lcd.print("Ready");
delay( 200 );
}

void loop()
{
Usb.Task();
}

10

Sigh....
Did you read this before posting a programming question, especially the part about using code tags ?

11

okey thx :slight_smile:

12

DuaneDegn:
Does the barcode reader have a serial option?

Maybe it's because I haven't used an USB host shield, but I was under the impression it's a lot easier to use TTL serial with the Arduino than it is to use USB.

I'm not positive it would be easier, but I hope you at least consider using the barcode reader with a TTL interface.

13

You don't need a USB shield with a Due, just plug a USB OTG adapter into the native USB port.