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Dyn. memory allocation

 
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cerr



Joined: 10 Feb 2011
Posts: 241
Location: Vancouver, BC

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Dyn. memory allocation
PostPosted: Tue Mar 15, 2011 4:51 pm     Reply with quote
Hi There,

I am writing an application where I want to receive data over rs232 from UART1 and forward them to UART2 - assuming the same baudrate. Now I am only on the receiving part. I wrote an isr that kicks in once the byte is ready to be received. Then i check certain things and I want to store it in an array from where it can be read out again and forwarded to UART2.
I have this code:
Code:

     int8 *buffer1 = calloc(1,1);
     buffer1 = realloc(buffer,++buffersz);
      if (!buffer1 && buffersz) {
        fprintf(DEBUG,"ERROR: Couldn't allocate memory at 0x%x",buffer1);
      }
      buffer = buffer1;
      buffer[buffersz-1]=ch;

Which doesn't seem to work properly and i'm not sure why, assume ch is the incoming character. I want to allocate some space with realloc() to store the newly received byte but it doesn't go anywhere, i'm confused...
Thanks for a little help here!
cerr



Joined: 10 Feb 2011
Posts: 241
Location: Vancouver, BC

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PostPosted: Tue Mar 15, 2011 5:20 pm     Reply with quote
I got it going I think but I just reserved a lame 100Byte large area of memory fix - it's a waste but I don't get it working with dyn. memory allocation :(
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