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.
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
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...
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
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.
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?p8p88?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<??<?????
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..
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;
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
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!!
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)
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 ?
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;
The Objective Of This Program Is To Create A File To Write Text And Read Back The File Content. To Do That I Have Made Two Function writeFile() To Write And readFile() To Read.The readFile() function works just fine but writeFile() doesn't.
How writeFile() function Works? when writeFile() function Execute It Takes Characters User Type And When Hit Enter(ASC|| 10) It Ask "More?(Y/N)" That Means What User Want? Want To Go Next Line Or End Input?
If "Y" Than Inputs Are Taken From Next Line Else Input Ends.
But The Problem Is When Program Encounters ch==10 It Shows "More?(Y/N)" And Takes Input In cmd variable.If cmd=='Y' I Mean More From Next Line Than It Should Execute Scanf Again To Take ch I Mean User Input.But Its Not!!! Its Always Showing "More?(Y/N)" Again And Again Like A Loop.
Code: #include <stdio.h> void writeFile(void); void readFile(void); int main(){
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.
I have a .txt file which I want to read from and then write a new text file, this time with sorted lines. It is easy to sort one value, but what about sorting entire lines based on one value?
I want to sort the lines based on the FIRST value.
this is my read/write functions based the read from the last post! then went nuts with it! used the %19s%*s on the write to the file, solved all the probs on the read side! but any refining on this would be great. This is another program that i started with the forums, and started going my own direction!
I'm looking to write a program in C/C++ to traverse a Fasta file formatted like:
>ID and header information SEQUENCE1 >ID and header information SEQUENCE2
and so on
in order to find all unique sequences (check if subset of any other sequence) and write unique sequences (and all headers) to an output file.
My approach was:
Prep: Copy all sequences to an array/list at the beginning (more efficient way to do this?)
Grab header, append it to output file, compare sequence for that header to everything in the list/array. If unique, write it under the header, if not, go on.
However, I'm a little unsure as to how to approach reading the lines in properly. I need to read the top line for the header, and then "return?" to the next line to read the sequence. Sometimes the sequence spans more then two lines, so would I use > (from the example above) as a delimiter? If I use C++, I imagine I'd use iostreams to do the reading.