Memory dump using fwrite in CCS v5

Hi Ki,

Can you please let me know how to assign data file to a buffer.

I  mean I have download a file and Now i want to assign that large chunk of data to a butter. I want to know how a data file to be access in code.

Naresh 

Ki-Soo Lee said:

Hi Dushyant,

Take a look at the below wiki topic on the basics of using C I/O:

http://processors.wiki.ti.com/index.php/Tips_for_using_printf

It mentions some of the more common "gotchas"

Another thing to consider is using CCS to handle dumping the contents of memory to a file with the CCS File I/O functionality. You can configure this with the breakpoints view (save data to file).

Hope this helps

ki 

Hi Naresh,

There are a lot of examples out there for C I/O. Searching on the web should provide a lot of examples.

here's one:

http://www.tutorialspoint.com/c_standard_library/c_function_fread.htm

Thanks

ki

Thank you for the response.

I want to assign a buffer that directly from the file. 

for example

int buffer[256000] = <fileName.txt/filename.dat>

Can you please share some example that can use like above code. 

Regards.

Nares

Ki-Soo Lee said:

Another thing to consider is using CCS to handle dumping the contents of memory to a file with the CCS File I/O functionality. You can configure this with the breakpoints view (save data to file).

KI,

Please, I’m asking how can I configure the CCS File I/O functionality in order to dump automatically a portion of memory to file during program execution on CCStudio v5.5 ?

Delared said:

Please, I’m asking how can I configure the CCS File I/O functionality in order to dump automatically a portion of memory to file during program execution on CCStudio v5.5 ?

Note that File I/O is intrusive. Basically the target needs to be halted for File I/O to work. You can configure CCS to halt, do File I/O and then resume execution. If this works for you, then I can provide more details. Please confirm.

Thanks

ki

Hi Ki,

I appreciate if you can give some thoughts on my problem. It is urgent for me. 

I want to assign a buffer that directly from the file. 

for example

int buffer[256000] = <fileName.txt/filename.dat>

Regards.

Nares

Naresh - did you see the link in my previous reply?

Ki-Soo Lee said:

Hi Naresh,

There are a lot of examples out there for C I/O. Searching on the web should provide a lot of examples.

here's one:

http://www.tutorialspoint.com/c_standard_library/c_function_fread.htm

Thanks

ki

There are many good examples of using f/open/fread. Here is another one;

http://www.thegeekstuff.com/2012/07/c-file-handling/

This functionality is documented very well. It is not a CCS functionality. It is standard 'C'.

Hello Ki,

Thank you for your time.

I don't want to use the fopen and fread function. They give me performance penalty. I don't want to put any loop. I need to only assign bulk of data at the compile time automatically form file to array. Just like assigning an array.

Just tell me this type of initialization is possible or not.  I have gone all the threads but not find anything related to this.

Regards,

Naresh

Hi,

One way of doing that is defining the array in .h and accessing it as external and then you would have a .c with the array with values. In order to do that you would have to cut and paste the content of your input file to the one with the array and put commas and braces...

One question similar to yours is this one:

http://e2e.ti.com/support/development_tools/compiler/f/343/t/178191.aspx

See if it works for you.

Regards

J.

Hi,

Naresh Patel1 said:

at the compile time

That is a key sentence to understand what you are trying to do. C language does not allow the initialization you mentioned before. You either have to use the runtime methods provided earlier by Ki (with the runtime penalties) or have the array fully declared in your source code. I usually define these long const arrays in a header file so I don't have to enlarge the C sources and can simply include them with the standard #include directive.

--Cheers

Naresh,

Johannes and 176671 are correct with their responses.

Thanks

ki