C++ :: Access Serial Port - This Declaration Has No Storage Class Or Type Specifier

Feb 26, 2013

I am writing a code using Visual C++ to access serial port.

Code:
HANDLE hSerial= CreateFile(L"COM1", GENERIC_READ | GENERIC_WRITE,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
DCB dcb = {0};
dcb.DCBlength=sizeof(dcbSerialParams);
dcb.BaudRate=CBR_1200;
dcb.ByteSize=8;
dcb.StopBits=ONESTOPBIT;
dcb.Parity=NOPARITY;

I am getting error in all last five lines in above code at dcb. and error is give below:-

Error: this declaration has no storage class or type specifier

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Visual C++ :: Sending Packet Of Type Byte To Serial Port

Feb 26, 2013

I need to send a packet of type byte:

0x00, 0x01, 0x02, 0x11, 0x00, 0x00

to a device via the serial port and then I receive and store data coming from device like this:

0x01, 0x01, 0x01 , 0x00, 0x00, 0x00, 0x01, 0x00, 0x04, 0x01, 0x00.

Writing lines of code through which:

1) I create the array
2) the sending the array to serial port
3) I'll see what I'm sending
4) I get the data

I'm using Visual Studio 2010 and C + + or VC++ language.

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C/C++ :: Expected Declaration Specifier In For Loop?

Mar 1, 2015

#include <stdio.h>
#include <math.h>
main() {
int n;
int k;
int j;
//gets user input for length of string
printf("Enter the value of n:");
scanf("%d", &n);

[code]......

When I compile my code I get an error saying that I need declaration specifiers in my is_prime subroutine in the for loop.

Here is the line of code it references.

for(j = 2; j < k; j++)

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C++ :: Inserting Hex Value And Sending It At Serial Port

Dec 17, 2013

I am trying to convert decimal value 1 to 32 to hex value and insert it at 4th pos of char array and send it as hex value at the serial port .

My issue is it is converting to decimal to hex value but when it sends, it treat the converted hex value as char and sends it equivalent hex value.

For example

if decimal =1 then its hex = 1.
so , writebuffer[3] =1

But when we send whole writebuffer through send function, it treat this 1 as char and sends its hex value as 31. how to send its hex value.

unsigned int i=0;
char hex[3];
unsigned char hexunsigned[3];
unsigned int dec;
do {
unsigned char writebuffer[8] ={0x01, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

[Code] ....

The send function is

void serial::send(unsigned char data[], DWORD noOfByte) {
DWORD dwBytesWrite;
WriteFile(serialHandle, data, noOfByte, &dwBytesWrite, NULL);
}

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C++ :: Read Serial Port Using Libserial?

Apr 14, 2014

I am using libserial library to communicate through the serial port in c++. the linux cpu is communicating with a modem through the serial port. basically this is what i want to do

Code:
//I want:
cpu to write command_1 to modem
Wait for the answer from modem
read serial port
check if command successful (i.e modem sends OK if successful and ERROR if there is an error)

If there is an error, resend command_1

if successful then Write command_2 to modem Wait for answer read again serial port check if command is succesful (modem again sends OK if successful and ERROR if there is an error) basically, this is the code...

Code:
serial_port <<command_1 <<'
'; //send 1st command
sleep(2); //delay a while

[Code].....

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C :: Voltage Range - Write The Value On Serial Port

Mar 6, 2015

I have a Voltage Range from -10V up to +10V, which I transform to a voltage Range 0V to 5V, with the schematic i've attached, so I can use the A/D converter of my ATMEGA32 processor.

Now I'd like to write the value of the Input Voltage (which moves in the Range of -10V to + 10V) on the serial port, but i don't know how i should calculate this factor. At the moment, I can only write the value of the A/D Converter Input on the serial, but this is only 0V to 5V...

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C :: How To Read And Write A File Using Serial Port

Dec 29, 2013

Explain me a working code to read and write a file using serial communication.and i need to store that file.I know normal file handling in C, but how it is through serial port i am not getting.

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C++ :: How To Send UNICODE Characters To Serial Port

Jul 17, 2013

I am trying to write data in Russian language to the serial (RS-232) port. My display device is already set to that character code page.

But output on the device is not exactly what I require.

My code snippet is like this below

CString pBuffer = L"английский"; //Russian Language
LPBYTE pByte = new BYTE[pBuffer.GetLength() + 1];
memcpy(pByte, (VOID*)LPCTSTR(pBuffer), pBuffer.GetLength());
long nBuffer=pBuffer.GetLength()+1;
DWORD dwWritten=0;
WriteFile(pHandle , pByte, nBuffer ,&dwWritten , NULL);

pHandle is a valid handle.

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C# :: Receive String Plus Image From Serial Port?

Sep 3, 2014

i want to read the string plus image from serialport.

sample output:
DENOMI Ver SERIAL NUMBER
100 V <<<<IMAGE>>>>
100 N <<<<IMAGE>>>>

but when im trying to receive the data and using serialPort.ReadExisting();

this is the output:

DENOMI Ver SERIAL NUMBER
100 V *!???????q??q??y??y?y?q?????????xxxxppppp????y?py?`q??q??q? q???????????????8?p8?@8??8???????? ?????8??8?p8?p?p??p??p?????????q?q?p8 p88?p8?????????????8?p8?p8?p8?p8??8??x??x8?8?8??p?p??p??p0?py?p????????~8?q??q??q??p8?????p??????????????????????????????p8?x?x<?x<?x<??<?????

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C# :: How To Send And Receive Data From Serial Port

Aug 13, 2014

private void button1_Click(object sender, EventArgs e) {
serialPort1.PortName = "COM1";
serialPort1.BaudRate = 9600;
serialPort1.DataBits = 8;
serialPort1.Parity = Parity.None;
serialPort1.StopBits = StopBits.One;

[Code]...

In my project i have a serialport control and a button, there is no error but i want to know how actually this works, i want to send and recieve the data from the serial port don't know how to do it..

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C# :: Read Barcode Scanner Value From Serial Port

Jun 2, 2010

How can i read barcode scanner value from serial port?

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C/C++ :: How To Completely Send A String Through Serial Port

May 9, 2013

I am doing a messaging application using Visual C++ window form application.

Sometimes I can't receive a whole message from the sender. If i type short sentence like "123456", it can be shown properly. But, if i type a quite long sentence like "123456789123456789", it can't shown a correct message, can't show exactly the whole message.

here is my code:

//transmission:
String^ message;
String^ message1;
String^ name = this->serialPort1->PortName;

[Code].....

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Visual C++ :: How To Read And Write On Serial Port With MFC

Feb 17, 2013

I want to read and write value on serail port to Microcontroller with MFC. The MFC have no serial port tool like in VB Professionnal edition. I try to find MFC connect serial port example but I not found. If you have good example for read and write on serial port with MFC

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C# :: Receive Data From Serial Com Port In One Line And Convert To Int

Mar 8, 2014

i have problem i make code that take data from serial com port for weighting machine it is ok working but it recieve data in more lines.I try to make it receive data in one line In code below i need to take weight fro weight bridge machine automatically by timer in visual studio 2005.it works but receive weight values in more lines. I need to receive weight in one line and automatically updated then convert t to integer

void Application_Idle(object sender, EventArgs e)
{
label3.Text = serialPort1.IsOpen ? "[Open]" : "[Closed]";
}

[Code].....

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Visual C++ :: Data Stuck When Debugging With Serial Port

May 10, 2014

I am making a MFC application with VC++2012 with receiving data from Serial Port and the data is stored in a Listbox, then after processing (convert into numbers) and get these data to draw a sine wave on the chart. (I intend to make a virtual oscilloscope).

Everything works ok at the beginning, but after receiving about 300 items or above (in the Listbox) the value seem stucking (or lagging) and work very slowly.

I receive data by the SerialPort_DataReceived() method, and process of converting and drawing chart also in this method, I think this makes the system overload!!

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C++ :: What Is The Type Specifier For Boolean

Dec 11, 2012

In the following example, how 'd I use sprintf when I have a boolean type of variable?

Code:
char s[64];
bool bVar = false;
sprintf(s, "This is a boolean variable bVar = %?", bVar);

What is supposed to replace ? in the sprintf statement ?

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C++ :: Libserial Library To Interact With Modem - Read Serial Port

Jun 27, 2014

I am using libserial library to interact with a modem using c++. The C++ code sends an AT command:

Code:
my_serial_stream << "AT+CSQ" << '
' ;

The modem responds with a response, either ERROR or OK, The c++ code to read the response:

Code:
while( serial_port.rdbuf()->in_avail() > 0 )
{
char next_byte;
serial_port.get(next_byte);
std::cerr << std::hex << (int)next_byte << " ";
}
std::cerr << std::endl;

I would like to handle the response such that if the response is OK, the modem sends another command and if the response is ERROR, the modem resends the first command.

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C/C++ :: Read A Type Specifier From A File

Oct 28, 2014

I need to create certain objects which are listed in a file. So my code needs to run a loop and create objects(of type specified in file) and put them in a list.

It appears to me that type specifiers can't be replaced by string. Is there a way out ? I want following code to be working somehow.

#include <iostream>
#include <string>
using namespace std;

[Code].....

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C Sharp :: How To Pick Date / Time When Serial Port Starts Reading And Also When Stops

Aug 18, 2014

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.IO.Ports;

[Code] ....

How to pick date / time when serial port starts reading , and also when reading stops ?

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C# :: One Thread Trying To Pass Data To Another Thread Using Serial Port

Jul 30, 2014

I have a class which I wrote and one of its object is "SerialPort" .NET class. In my MainWindow I created instance of my class called "SerialPortComm", then I send through some functions of mine, commands to the Serial Port, and I receive answers through "DataReceived" event.

But when I trying to use Dispatcher.BeginInvoke to write my data I have received (successfully), nothing shows on the RichTextBox which I'm trying to write to.

What can caused that, and How I can make it works?

SerialPortComm.cs

public partial class SerialPortComm : UserControl {
public SerialPort mySerialPort = new SerialPort();
public void Open_Port(string comNumber, int baudRate) {
mySerialPort.PortName = comNumber;
mySerialPort.BaudRate = baudRate;

[Code] ....

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C++ :: Invalid Storage Class For A Function?

Mar 23, 2014

I made a program and when I try to use the main driver to instantiate everything it says invalid storage class for a function. All of my code is in 4 separate files i'm just trying to get it to run now.

Code:
#include "stdafx.h"
#include <iostream>
#include <iomanip>
#include <fstream>

[Code]......

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C/C++ :: Explicit Specialization Cannot Have A Storage Class

Jan 31, 2013

I am porting code from windows using visual studio to mac with xcode.

Quite a lot of issue have a appeared, which is no surprise, one warning that keeps on appearing is Explicit Specialiszation cannot have a storage class:

enum SortReturnCodeEnum {LOWEST=1, HIGHEST=2, HIGHLOW = 3, IDENTICAL=4};
template<typename tKey>
static SortReturnCodeEnum DefaultCompare(typename ArgType<tKey>::ARGT Value1, typename ArgType<tKey>::ARGT Value2)
{

[Code]....

I could do a #define __GNUC__ but i was checking

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C/C++ :: Storage Class Specifiers Concept?

Feb 15, 2013

Write a program using all storage class specifiers?

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C++ :: Access Variable From Other Scope Without Global Declaration?

Aug 8, 2013

Code:
#include <iostream>
using namespace std;
void f() {
int x=17;
//cout<<main::y<<endl; i want to access y from main scope
}

int main() {
int y=23;
//cout<<f::x<<endl;

I want to access x from f scope is there any way for this without global declaration? specially about function scopes...

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C/C++ :: Too Many Type Declaration Shown For A Function

Nov 3, 2012

It shows too many type declaration in the void push function. And I use turbo c++..

#include<stdio.h>
#define size 5
struct tack {
int top;
int item [10];
} void push(struct tack *s, int data)

[Code] .....

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C++ :: New Data Type In Method Declaration?

May 26, 2013

I want my method of the class to take as an input an array of data type derived from class. How can I do this?

Code:
class Planet {
public:
// typedef class Planet PlanetType;
void GetForce(int, PlanetType []);
};

Or when should I define my new data type PlanetType?

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