16 bit math in flowcode

[pheelius]

One can do 16 bit math in flowcode using the c box, here is an example of the code needed for the 10 bit ADC:

int a, b, c, d, e, f, g, h, i, j;
a=((4*FCV_ADCH) + (FCV_ADCL/64));
b=a/1000;
c=1000*b;
d=a-c;
e=d/100;
f=100*e;
g=d-f;
h=g/10;
i=10*h;
j=g-i;
FCV_A=b;
FCV_B=e;
FCV_C=h;
FCV_D=j;

there is probably an easier way of doing it as I haven't done much programming before. In this example you define "a" to be the complete 10 bit value from the ADC, you then decompose this value into the four 8 bit digits that make up the 10 bit value and then set them as flowcode variables "A", "B", "C", "D" in that given order of significance.

One could add an on/off function to give an output "OUT" above (or similarly for below) a certain setpoint of the 10 bit ADC value we have denoted "a", the setpoint in the following example is set at 512 could be any 10 bit value or usefully a flowcode variable:


int a, b, c, d, e, f, g, h, i, j;
a=((4*FCV_ADCH) + (FCV_ADCL/64));
b=a/1000;
c=1000*b;
d=a-c;
e=d/100;
f=100*e;
g=d-f;
h=g/10;
i=10*h;
j=g-i;
FCV_A=b;
FCV_B=e;
FCV_C=h;
FCV_D=j;
if (a>512) FCV_OUT=1;
if (a<=512) FCV_OUT=0;

[Steve]

Great post, Pheelius.

Yes, FlowCode's own variables are only 8-bit, but the underlying 'C' compiler can handle 16-bit arithmetic and so using 'C' icons to do 16-bit mathematics can make the calculations easier.

We're currently working on v3 of FlowCode, which will be able to do 16-bit arithmetic without needing to resort to 'C' icons.