AN3984 datasheet(42/46 Pages) STMICROELECTRONICS

42 / 46 page

Matlab code (functions)

AN3984

42/46

Doc ID 022240 Rev 1

counter = 1;

while counter<=5

if imag(CoeffAPW(counter))~=0

Error = 3;

end

counter = counter+1;

end

% Filter coefficiners or Error message.

switch Error

case 0

% No error

h=fvtool(Coeff(1:3),Coeff(4:6));

disp('

');

disp('

');

disp('******************************************************************************

*****************');

disp('

Filter Coefficients');

disp('******************************************************************************

*****************');

Label = {'Coeff 1: b1/2', 'Coeff 2: b2', 'Coeff 3: -a1/2', 'Coeff 4: -a2',

'Coeff 5: b0/2'};

TABLE_data = {Filter_Coeff(1,:)

Filter_Coeff(2,:) Filter_Coeff(3,:) ...

Filter_Coeff(4,:) Filter_Coeff(5,:)};

% TABLE_data = num2cell(TABLE_data);

TABLE = [Label; TABLE_data];

disp (TABLE);

case 1

% The coefficient range must be changed

disp('

');

disp('

');

disp('******************************************************************************

*****************');

disp('

Error!!!');

disp('

The coefficient range must be increased');

disp('******************************************************************************

*****************');

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