What is the use of processing the values as follows in a motor control program? define ScaleQ15 Va

value & 0x3ff) means to keep the lowest 10 bits of the 16-bit binary value and clear the high value to zero.

5 means to move it 5 bits to the left.

From the English meaning of the name of the symbol scaleq15 (the fixed decimal place of the 15-digit decimal part is retained), as the name suggests, the author's intention seems to be:

The lower 10 bits of the original value represent a certain data. The lower 10 digits are equivalent to 0 1023 in decimal system. Take 1024 as the full degree.

The author wants to treat this range fullness as 1, and the data as a pure decimal less than 1, and use 16-bit binary to represent 1 integer and 15 decimal places. i.e. form.

scaleq15(value) is to convert the data in the original value into the above 16-bit binary form.

The second scaleq15neg(value) converts the negative value of the data into the 16-bit binary form mentioned above. Note that this is in the form of a complement, so one digit of the integer part of the obtained fixed-point decimal becomes a sign bit (binary ** is 1).

Third, it is not easy to be sure of the author's intent when the context is not known. Only a few guesses can be made.

One possibility is that:

It is estimated that the value has been expanded to 32 digits at this time, and the decimal part is no longer 15 digits but 16 digits. At this time, if you want to round to the nearest integer, you should add the equivalent ** and then move it to the right by 16 digits.

And the 0x8000 added here is equivalent to 16 fixed-point decimal places. However, instead of shifting 16 bits to the right, it is 7 bits to the right. It may be that the author had other intentions (e.g., a 9-bit shift to the right somewhere below).

And because it is only shifted by 7 digits, it is truncated to 16 digits unsigned int, and it is 7 integers and 9 decimal places.

Another possibility is:

At this point, the value has been expanded to 32 digits, while the decimal part is still 15 digits. And because of some need to add 1, the 0x8000 here is equivalent to 15 fixed-point decimal places. The purpose of shifting 7 bits to the right is to take the unsigned long type of 17-bit integer and 15-digit decimal place to truncate 8-bit integer 8-digit decimal place, and represent it as a 16-bit unsigned int type.

You have to have a context, right.,,So drag out a few sentences alone.,It's hard for others to answer the point.。。。

(1) By the question, the rated efficiency of the ant liter =,pn=, the comic is: p1=pn Yamamonoga =, un=110, ian=25a

2) if=uf/rf=

3)ea=un-iara=110-25*(4) t=pn/ω=2200/(2*pi*n/60)