MATLAB: Functions to combine two hexadecimal numbers

combined numberscommunicationhexadecimalmotor command

I'm doing a project that involves taking in data from an EMG, running it through a function in Matlab, and sending commands to a series of motors. The motors take a series of 2 hex numbers, one 2 digits, one 4 digits preceded by the letter d. For example, d0103FF. My question is, how can I write a series of functions that takes the difference between two numbers, converts it to a zero padded four digit hexadecimal, and then tacks it onto the end of dXX where X is another number.

Best Answer

y = desired - actual;
h2 = dec2hex(x,2);
h4 = dec2hex(y,4);
out = [ 'd' h2 h4 ];

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MATLAB: Integers to English phrase

As a further hint, consider the following version, which is almost what you want

function S = convert_to_words(number)
   ones= {'', 'One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight', 'Nine'};
   tens = {'','ERROR', 'Twenty-', 'Thirty-'};
   
   tens_digit=3;
   ones_digit=4;
   
 S=[tens{tens_digit + 1}, ones{ones_digit + 1}];
 
end

It works very reliably on the number 34,

>> S=convert_to_words(34)
S =
    'Thirty-Four'

Your job is to get it to work for everything else.

MATLAB: How to pass a hexadecimal number, generated in MATLAB workspace, as an input to the C-MEX routine

The MATLAB function DEC2HEX returns the hexadecimal representation of a decimal integer as a string. If this value is passed as an argument to your MEX routine, it will be passed as a string and not as a hexadecimal number. In the C-MEX routine, you will need to parse the string and write your own routine to convert this string into a hexadecimal number.

Similarly, if you want to pass a hexadecimal number from C to MATLAB, you will have to pass the string representation of the hexadecimal number to MATLAB. You can then use HEX2DEC function to convert the string into a decimal number.

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Related Solutions

MATLAB: Integers to English phrase

MATLAB: How to pass a hexadecimal number, generated in MATLAB workspace, as an input to the C-MEX routine

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