Hello Rafael,
Thanks for reply on the same day itself!
i have used the data type same as the given in the sample code without any changes. i had the similar doubt in the start about 'all postive values'. To probe into that i checked the nature of values y[3] array is taking. The variable y[n] is able to take the negative values as shown in the screenshot. The sinewave graph, its properties, typical values of the y[3] and the code are shown in the screenshots.
In start, i had used C6713 Cycle Accurate simulator, little endian and later (before posting to forum) used C674X Cycle Accurate simulator, little endian (as given in guide). But problem is same with both of them.
Please ask for any more details if you need on my part.
Regards,
Dhiraj