Datatype not supported by stateflow data: Data overflow
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In Stateflow flow graph. I have mentioned a statement
Difference = data1 - data2;
I have assumed data types for this variable as follows
Difference - int32 - local
data1 - int32 - local
data2 -int32 - local
During run time data1 takes 86458 and data2 takes 5381838. while debugging it shows me a error: data overflow...
Kindly Please anyone help me out in solving this issue
Thanks in advance...:)
1 个评论
Walter Roberson
2011-6-7
"I have assumed data types" -- but has Stateflow assumed the same data types? The error you are seeing could happen if Stateflow was using unsigned data types such as uint32.
采纳的回答
Fangjun Jiang
2011-6-7
>> data1=int32(86458 )
data1 =
86458
>> data2=int32(5381838)
data2 =
5381838
>> Difference = data1 - data2
Difference =
-5295380
It seems no problem in Matlab. Are you sure the error is caused by this? Could you step through Stateflow to see when the error occured?
6 个评论
ramesh kumar sri
2011-6-8
ramesh kumar sri
2011-6-8
Walter Roberson
2011-6-8
That is exactly the behavior that one would see if the values were unsigned integers: unsigned integers "underflow" to 0 when you attempt to store a negative number in to them.
Fangjun Jiang
2011-6-8
Walter might be right. Are you sure you declare those variables as int32, not as uint32?
>> data1=uint32(86458 )
data1 =
86458
>> data2=uint32(5381838)
data2 =
5381838
>> data2-data1
ans =
5295380
>> data1-data2
ans =
0
ramesh kumar sri
2011-6-8
ramesh kumar sri
2011-6-8
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