whats wrong with my hdl - inc16

[pwolf]

CHIP Inc16 {
    IN in[16];
    OUT out[16];

    PARTS:
   // Put you code here:
   Add16(a[0] = in[0], b[0] = true, out[0]= out[0]);
   Add16(a[1] = in[1], b[1] = false, out[1]= out[1]);
   Add16(a[2] = in[2], b[2] = false, out[2]= out[2]);
   Add16(a[3] = in[3], b[3] = false, out[3]= out[3]);
   Add16(a[4] = in[4], b[4] = false, out[4]= out[4]);
   Add16(a[5] = in[5], b[5] = false, out[5]= out[5]);
   Add16(a[6] = in[6], b[6] = false, out[6]= out[6]);
   Add16(a[7] = in[7], b[7] = false, out[7]= out[7]);
   Add16(a[8] = in[8], b[8] = false, out[8]= out[8]);
   Add16(a[9] = in[9], b[9] = false, out[9]= out[9]);
   Add16(a[10] = in[10], b[10] = false, out[10]= out[10]);
   Add16(a[11] = in[11], b[11] = false, out[11]= out[11]);
   Add16(a[12] = in[12], b[12] = false, out[12]= out[12]);
   Add16(a[13] = in[13], b[13] = false, out[13]= out[13]);
   Add16(a[14] = in[14], b[14] = false, out[14]= out[14]);
   Add16(a[15] = in[15], b[15] = false, out[15]= out[15]);






i dont know wht im doing wrong, i dont think my thought of setting the first value to true and the rest to false is wrong, so im sure its the hdl..  help is appreciated. and if by some chance im a moron and i've done this totally wrong, can you let me know !

[cadet1620]

pwolf wrote

   Add16(a[0] = in[0], b[0] = true, out[0]= out[0]);
   Add16(a[1] = in[1], b[1] = false, out[1]= out[1]);
   Add16(a[2] = in[2], b[2] = false, out[2]= out[2]);
...

Each Add16 in your circuit is an independent 16-bit adder. The first line adds 1 to in[0] and assigns it to out[0]. The carry from this addition is discarded because there is no connection to this adder's out[1].

The second line is another adder that adds 0 to in[1] and assigns it to out[1]. Since this adder's a[0] and b[0] are not connected, they default to 0 so there is never a carry generated by a[0]+b[0], so out[1] always equals in[1].

Your Inc16 needs to have exactly one Adder16 in it so that carry propagates correctly. The adder's "a" input needs to be "in" and the "b" input needs to be 1. The trick is to figure out how to set "b" = 1.

--Mark

[pwolf]

of course! what was I thinking..  I changed it now and it works, I'm such a moron after all! haha

help much appreciated, think I should try do my thinking earlier in the day in future.

[Salla]

Well, I don't figure it out... And reading appendix A 5.3 again and again and again doesn't help me at all

[cadet1620]

Salla wrote

Well, I don't figure it out... And reading appendix A 5.3 again and again and again doesn't help me at all

Without knowing more about your HDL I can't guess what's wrong.

Email me your HDL and I'll give you some help.

--Mark