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Memory overflow problem

Ramesh Kumar Palanisamy

Hi all,

I'm using 89C52 controller in my application. I'm using a 90 byte buffer to store received message from UART. Based on this received message I'm controlling I/O ports. The same buffer I'm using for transmitting the application dependent internal status message.

To identify the message I'm using absolute address position for example, if(arr[59] == '*'){do something;}

every first message after reset this is working fine. After that the control hangs somewhere thus its giving undetermined behavior.

I set the memory model as Large: all variables in XDATA.

I hope some address overflow is happening here.

Can anyone help me to resolve this issue.

Thanks in Advance.

Regards,
Ramesh

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