Invalid Cofunction Instance following DC Upgrade

Rabbit
1

Hello,

I have been developing for a Rabbit 4120 processor with DC v10.54 on a program that I took over from someone else, and everything has been compiling and running fine for several weeks.

Just for the sake of experimenting, I tried upgrading to DC 10.64, but with the upgrade, I get the fatal run-time error:

Invalid Confunction Instance at the address 0C:0008

Is there anything obvious that would cause this to happen between different versions of DC?

Thanks,

Kent

2

Additional information:

I was able to determine that the program is crashing when trying to execute the function:

cof_serXwrite()

As I said, this worked fine with DC10.54, but now causes an Invalid Cofunction Instance while running when compiled with DC10.64.

Any thoughts would be appreciated.

Thanks again,

Kent

3

Just wondering if you wera able to determing the problem?

4

Yes, this is a compiler issue. Rabbit’s tech support came up with the following work-around:

A work around is to substitute DC 10.60’s Lib\Rabbit4000\RS232.LIB and Lib\Rabbit4000\CBUF.LIB into DC 10.64 (or DC 10.62). After this substition in DC 10.64 a warning is produced, e.g.:

line 2540 : WARNING RS232.LIB : Type mismatch: incompatible types void() and int( *)() used in expression.

This warning can be safely ignored, as it occurs when void * spd_dummyfunc is assigned to int * serDdata.xCheckCTS, where the dummy function is never actually called because an appropriate assignment from int * spd_checkcts_fc is made when HW flow control is enabled.

Hope this helps,

-Kent