12bit transmit over RS232

[pvol]

hello...

i need to transmit 12bit value over 232
how can i do this?
232 has 8bit data
one thought is to split 12bit in 2 bytes and transfer it separately.
but its very difficulty to join them at the pc (i use labview )

is there a simple way to do this?

thank you..

[FvM]

That's exclusively a LabView problem to my opinion. But why not sending the data decimal or hex coded?

[pvol]

can i send a number >255 ?
let's say, as example that
i write printf("500\n");
what value will send to pc?

[Ttelmah]

Printf, as you show there, sends _text_. Nothing whatsovever to stop you sending (for instance) '25000', but over the RS232, this will be sent as five ASCII text characters, not '12 bits'. This is probably the easiest way to do what you want, but will take more time over the RS232.

Best Wishes

[pvol]

in order to send '25000' what must i do so that the computer understands 25000 as a number and not as characters?
what kind of transformation must i do at the CCS?

[FvM]

You should use %lu respectively %ld printf format with CCS C to display int16 values.

[pvol]

i'll try it and i'll tell you the results
thanks for the answers...

[pvol]

i tried this and works fine!!
now i have another problem
i want to present an array that has got negative numbers on labview
int array[6]={10 20 30 -10 -20 -30}
for (i=1;i<=6,i++)
{printf("u% \n"array[i])}

10 20 30 plotted
but -10 -20 -30 not!
what is your opinion about this?
is it possible to sent (and present) negative numbers?

[Salenko]

[pvol]

thank you!!!
works great!!