C# :: Reading Byte From Serial Ports
Jun 8, 2014
how to use this function:
ftStatus = myFtdiDevice.Read(readData, numBytesAvailable,ref numBytesRead);
to read byte from the serial port.This function is part of the DLL that came with the chip(FT2232D) I am using on my board.I want to use the function to read a byte from the serial port and then send the value to the Graphic user interface.Unfortunately I was unable to get the expected value on my GUI.If I send for instance 40,what I get on the GUI are letters instead of the number 40 or at times the GUI will not even respond.Below are my lines of code I used to read the byte from the serial port:
The following instructions are executed whenever the CHECKBOX is checked
private
void checkBox1_CheckedChanged(object sender, EventArgs e)
{
UInt32 numBytesRead = 0;
[Code].....
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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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Jan 19, 2015
I am trying to make a project using arduino to control several power surces by time, i don't want to have an lcd, that would be easyer but i don't have enought space on my project, i want to set the time and the timing for the relays via Serial
Of curse i could set it using the serial monitor on the arduino ide, but i want to make a simple program to make the pc comunicate with the arduino and make it simpler to set the time and similar stuff. How to use one of my usb ports to print and read serial data?
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Jun 25, 2014
I basically want to create a save editor application that will enable people to alter various values in the save by clicking on releveant buttons and then also for the editor to auto update the checksum when changes are done.
The save file is in hex so from what I can gather I would need to create a button to open the file using 'open file dialogue' and then read the file into a byte array so that the values can be called at any time when a particular butto is pressed and the application will then seek to the point in the file to make the required changes.
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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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Mar 5, 2013
how to control usb ports in visual studio C++?
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Dec 2, 2014
My first time programming sth in Network. I have to use C to send a file to another PC, well COM port are useful but I didn't find how to refer to the address of my destination.
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Jul 30, 2014
I'm learning C++. Is there some way to make program function on input from a port like usb port and can I send bits through the port? For example A usb cable connected to a circuit. I press a button and an AND gate on the circuit gets activated by a bit from the usb port and a fan in the room turns on.
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Sep 3, 2013
I want to put my socket programming example of how it can support multiple ports. I want to make the process more requests from distributing particles to create non-blocking structure
ports support ports defined variable.
Code:
#include "stdio.h"
#include "stdlib.h"
#include "unistd.h"
#include "errno.h"
#include "string.h"
#include "sys/socket.h"
[Code] .....
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Oct 18, 2014
I read correctly in MatLab some data by serial port of a device, but in C... nothing.
Code: #include <cstdlib>
#include <stdio.h>
int main(void)
{
FILE *in;
char linha[30];
while(1)
{
// Abrir porta COM de onde se ligou a placa
in = fopen( "COM8", "r" );
if( in == NULL )
{
[code].....
The message "ERRO: no consigo abrir porta COM " don't appear, so I haven't error there. I just do not see anything in the terminal.
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Dec 18, 2013
I have to communicate between two laptops using USB-to-Serial adapter. I have written 2 programs one for sending and another for receiving. Programs were written in both C and C# programming languages.
Using C language: I am able to successfully communicate using C-Programs mentioned below. But the problem is speed. It takes around 1 hour(60min) for just to pass 150MB. improving the performance of this programs...I also mention some comments along with programs for self understanding.Sender File on laptop with serial port :
Code:
#include <stdio.h>
#include <bios.h>
#include <conio.h>
}
[code]....
The above 4 programs behaves as, sender send a character and receives an ack for every character. I have followed this approach, bcoz other approaches were not working fine (in the sense the complete data is not sent, the amount of data sent is not judgeable, bcoz it will different every tym). when i used this approach it worked fine.
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Mar 15, 2013
Wondering why I cannot communicate with my microcontroller dspic33 with the Hyperterminal program. In the sample test code, I also cannot use printf. They have it set up differently and I am wondering if it is possible to redirect the output of the printf, scanf functions to the port I am using?
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Jun 2, 2014
I want to read a file who contain a serial of number like in this example : +200,-100,+400,+200,-200 and the sign is very important for the rest of the program so i should save those signed numbers in an array or a struct that i can define with a boolen variable if it's + i give it 1 else if it's - it'll be 0
I wrote a basic file's code reader but i don't think there is a solution on it
Code:
void read_file(char *fil1){
FILE *f;
int ch[500];
f=fopen(fil1,"rt");
if(f==NULL)
[Code] .....
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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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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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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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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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Dec 25, 2013
Write program that do the algorithm of serial divider( You can divide to number in binary form and result also in binary.
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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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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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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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Jun 2, 2010
How can i read barcode scanner value from serial port?
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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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Jan 17, 2013
I wrote a class pedal that allows to search for the serial port on which the pedal is connected. Therefore I send a request to the pedal and set up a timer event of 20 ms. If no reply, I search for the next serial port.
When found I send configuration to the pedal and set another timer event of 200 ms that requests for pedal state. It runs fine.
Now if the pedal is disconnected then connected again I would like it to run again.
Therefore I set another timer event every 2s that launches all what I described above.
The trouble comes because the 20 ms timer event doesn't run and I do not understand why.
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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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Mar 30, 2013
What is the most efficient way to read a bit at a particular position in a byte?
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