How to convert numbers into ASCII array in Matlab Function in Simulink?

Hi,

to send Data via serial communication to a certain device I have to transform three numbers into an ASCII array and afterwards into a uint8 array. The numbers usually look like this:

a = 1400; %always between 1000 and 2000
b = 20;
c = -10; %b and c are angles in [°], always between -45° and 45°

The resulting Arrays have to look like this:

string = [1400,20,-10,]
out =  [49   52   48   48   44   50   48   44   45   49   48   44]

The ',' are important for the receiving device to understand the signal.

For now in simulation I used following code and it worked fine:

string = [num2str(a),',',num2str(b),',',num2str(c),','];
out = uint8(string);

But for the realtime-use I have to compile the Matlab Function which means I can not use num2str or any other function like sscanf, ssprintf ect...

Do you have any idea how I could obtain the same result without using num2str?

Sincerely,

Thomas

Edit: Found a Solution. See Comment below.

[Thomas]

Well.. i talked to a collegue this morning and we figured something out (that works explicitly for this task). If anyone is interested in it, here's a possible solution:

a = 1400;
b = -10;

%convert a

cnt = 4;
a_arr = zeros(cnt+1,1);
for  i=cnt:-1:1
 a_arr(i)=mod(a,10);
 a=floor(a/10);
end
a_arr(5)=44; %','

%convert b

if b < 0
 vz = 45; %'-'
 b = -1*b;
else
 vz=43; %'+'
end
cnt = 2;
b_arr=zeros(cnt+2,1);
for i=cnt:-1:1
 b_arr(i+1)=mod(b,10)
 b=floor(b/10)
end
b_arr(1)=vz;
b_arr(cnt+2)=44; %','

%c works like b

%put them together
out = zeros(9,1);
for i=1:1:5;
 if u1_arr(i)<10 %numbers, ASCII->uint8->+48 (see ASCII table)
  out(i)=a_arr(i)+48;
 else %signs '-', '+' or ',' are already in uint8
  out(i)=a_arr(i);
 end
end
for i = 6:1:9
 if b_arr(i-5)<10
  out(i)=b_arr(i-5)+48;
 else
 out(i)=b_arr(i-5);
 end
end

which results in

out = [49 52 48 48 44 45 49 48 44]

This way seems a bit clumsy, but it works and can be compiled.

Sincerely,

Thomas

[Ryan G]

Thanks for posting your self-solved problem. I was looking at doing this myself and was working out a way to do it and generate code.