hello!
i want to connect arduino mega to weighing,zebra printer and barcode scanner(weighing and zebra use rs232 and barcode use usb host shield). actually i want print the output from barcode and weighing.
i can connect from arduino to weighing or arduino to zebra printer or barcode to arduino or barcode to arduino to zebra printer)
but if i connect arduino to weighing,zebra printer and barcode, the output is nothing.
this is my code
#include <hid.h>
#include <hiduniversal.h>
#include <usbhub.h>
#include <Usb.h>
#include <hidboot.h>
#include <avr/pgmspace.h>
#include <SoftwareSerial.h>
int inpt = 2;
int outpt =3;
SoftwareSerial mySerial(inpt,outpt); // RX, TX
const byte BarcodeLength = 14;
const byte WeightLength = 15;
const byte WeightRxPin = 14;
const byte WeightTxPin = 15;
class BarcodeReader : public KeyboardReportParser
{
USB Usb;
USBHub Hub;
HIDUniversal Hid;
HIDBoot<HID_PROTOCOL_KEYBOARD> Keyboard;
uint8_t buffer[BarcodeLength + 1];
byte length;
bool valid;
void addCharacter(uint8_t c);
public:
BarcodeReader();
void begin();
void task();
const uint8_t* barcode();
void reset();
protected:
virtual void OnKeyDown(uint8_t mod, uint8_t key);
};
BarcodeReader::BarcodeReader()
: Usb()
, Hub(&Usb)
, Hid(&Usb)
, Keyboard(&Usb)
, length(0)
, valid(false)
{
}
void BarcodeReader::begin()
{
if (Usb.Init() == -1) {
Serial.println("OSC did not start.");
}
Hid.SetReportParser(1, this);
}
void BarcodeReader::task()
{
Usb.Task();
}
void BarcodeReader::addCharacter(uint8_t c)
{
if (valid) {
// already have a barcode, new one will overwrite it
reset();
}
// could check for \n or \r if necessary, or even implement a timing
// mechanism for detecting end of barcode input, but for now we just
// assume fixed width field with no output separators
buffer[length++] = c;
buffer[length] = '\0';
if (length == BarcodeLength) valid = true;
};
// return value no longer valid after another call to task()
const uint8_t* BarcodeReader::barcode()
{
return (valid) ? buffer : 0;
}
void BarcodeReader::reset()
{
length = 0;
valid = false;
}
void BarcodeReader::OnKeyDown(uint8_t mod, uint8_t key) {
uint8_t c = OemToAscii(mod, key);
if (c) addCharacter(c);
}
class WeightReader
{
SoftwareSerial ss;
uint8_t buffer[WeightLength + 1];
byte length;
bool valid;
public:
WeightReader();
void begin();
void task();
const uint8_t* weight();
void reset();
};
WeightReader::WeightReader()
: ss(WeightRxPin, WeightTxPin)
, length(0)
, valid(false)
{
}
void WeightReader::begin()
{
pinMode(WeightRxPin, INPUT);
pinMode(WeightTxPin, OUTPUT);
ss.begin(9600);
}
void WeightReader::task()
{
if (ss.available()) {
uint8_t c = ss.read();
if (valid) {
// already have a weight, new one will overwrite it
reset();
}
switch (c) {
case '\r': // discard carriage return
break;
case '\n': // end of weight
if (length == WeightLength) {
valid = true;
} else {
// missed the beginning of the weight
reset();
}
break;
default: // store weight characters
if (length < WeightLength) {
buffer[length++] = c;
buffer[length] = '\0';
} else
{
// unexpected output from scales; should never happen
reset();
}
}
}
}
// return value no longer valid after another call to task()
const uint8_t* WeightReader::weight()
{
return (valid) ? buffer : 0;
}
void WeightReader::reset()
{
length = 0;
valid = false;
}
BarcodeReader barcodeReader;
WeightReader weightReader;
void setup() {
Serial.begin(9600);
pinMode(inpt, INPUT);
pinMode(outpt, OUTPUT);
mySerial.begin(9600);
barcodeReader.begin();
weightReader.begin();
}
void loop() {
barcodeReader.task();
weightReader.task();
const char* barcode = barcodeReader.barcode();
const char* weight = weightReader.weight();
Serial.println(weight);
if ( barcode && weight) {
Serial.println(weight);
Serial.println(barcode);
mySerial.println("^XA");
mySerial.println("^LH30,30");
mySerial.println("^FO150,40");
mySerial.println("^ADN,90,50");
mySerial.println("^AD^FD");
mySerial.println(barcode);
mySerial.println("^FS");
mySerial.println("^FO150,80");
mySerial.println("^ADN,90,50");
mySerial.println("^AD^FD");
mySerial.println(weight);
mySerial.println("^FS");
mySerial.println("^XZ");
barcodeReader.reset();
weightReader.reset();
//delay(20000);
}
}
what should i do if i want this hardware working? thank you
