These files may calculate digital filters FIR and you can change the size and the kind
of the window, frequencies, number of sample. You must have your TI in Radian mode 

BPSS
bpss(inferior cut frequency, superior cut frequency, sample, window size, kind of window)
kind of window:
1 = Barlett 0 < n < M/2
2 = Barlett M/2 < n < M
3 = Rectangular Window
4 = Hanning Window
5 = Hamming Window

HPSS
hpss(cut frequency, sample, window size, kind of window)
kind of window:
1 = Barlett 0 < n < M/2
2 = Barlett M/2 < n < M
3 = Rectangular Window
4 = Hanning Window
5 = Hamming Window

LPSS
lpss(cut frequency, sample, window size, kind of window)
kind of window:
1 = Barlett 0 < n < M/2
2 = Barlett M/2 < n < M
3 = Rectangular Window
4 = Hanning Window
5 = Hamming Window