Cant multiple int16*int16

[KAZMA]

Hi
i have to multiple two unsigned int16 numbers.

unsigned int32 result;
unsigned int16 number1;
unsigned int16 number1;

code is like this;

result=number1*number2;

then i am showing the result on LCD
if the number1 is greater then 300 (or equals) then the result is lower as 256*number2

for example
number1=10;
nuber2=105;
result=1050 this works fine

but
when number1=300;
number2=1;
result=44;

what am i missing

[Ttelmah]

Start by correcting your typing errors!. You are declaring 'number1' twice in what you post, and not showing the declaration of number2 at all. Now what you are seeing, implies that probably you have 'number1' really declared as an int (8 bit int), not an int16.
As a separate comment though, there is no point in declaring the result as int32 in what you show. By default, CCS, only return the low 16 bits of a 16*16 multiplication. If you want a 32bit result, then you need:

[KAZMA]

there are no type errors in my orginal code.
and i tried

result=(int32)number1*number2;

i still get the same result.

thanks

[jecottrell]

I would suggest that you listen to the suggestions of the pros that take a significant amount of time to help a lot of us amateurs. They see things immediately that we can't see after staring for hours. Telling one of them they are wrong will quickly get you a place on the 'ungrateful, do not assist' list.

[rnielsen]

Would it need to have both variables cased and be written like this:

[jecottrell]

I was wondering a similar thought.... out of ignorance I typically cast like this:

[KAZMA]

Hi everyone
i solved the problem thanks everybody,

@jecottrell if you read it again i said
there are no type errors in my ORGİNAL code this here is just a sample,

and i didnt say to anyone they are wrong, i said just i dont any type errors

anyway

in my code i was generating the numbers from something other

unsigned int8 xx;

number1=xx*1000;

the problem was that the variable xx was int8 i changed the definition of variable xx to int16 then it worked

i was using CC5x there werent problems like this

thanks again

[Ttelmah]