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programmable delay tested

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alexmadison
2022-03-01 15:26:43 +01:00
parent 8268379572
commit 00869fc16e
6 changed files with 466 additions and 0 deletions
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59
dataflow_neuro/primitives.act
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@ -587,4 +587,63 @@ namespace tmpl {
BUF_X1 reset_buf(.a=reset_B, .y=_reset_BX,.vdd=supply.vdd,.vss=supply.vss);
sigbuf<N> reset_bufarray(.in=_reset_BX, .out=_reset_BXX);
}
// Programmable delay line.
// N is the number of layers,
// the longest layer having 2**N DLY elements
export template<pint N>
defproc delayprog (bool! y; bool? a, s[N]; power supply)
{
{ N >= 0 : "What?" };
{ N < 9 : "Delay prog size is given in 2**N. Given N is too big." };
AND2_X1 and2[N];
MUX2_X1 mu2[N];
DLY4_X1 dly[(1<<N) -1];
// AND2_X1 and2[N] (.vdd = supply.vdd, .vss = supply.vss);
// MU2_X1 mu2[N] (.vdd = supply.vdd, .vss = supply.vss);
// DLY4_X1 dly[(1<<N) -1] (.vdd = supply.vdd, .vss = supply.vss);
bool _a[N+1]; // Holds the input to each row
_a[0] = a;
pint i_delay;
i_delay = 0; // Index of the last connected delay element
(i:0..N-1:
// For each row
and2[i].a = _a[i];
and2[i].b = s[i];
// Delays
dly[i_delay].a = and2[i].y;
i_delay = i_delay + 1;
(j:1..i-1:
dly[i_delay].a = dly[i_delay-1].y;
i_delay = i_delay +1;
)
// Mux
mu2[i].a = _a[i];
mu2[i].s = s[i];
dly[i_delay-1].y = mu2[i].b;
_a[i+1] = mu2[i].y;
)
y = mu2[N-1].y;
// Connect everything to vdd/gnd
(i:N:and2[i].vdd = supply.vdd;)
(i:N:mu2[i].vdd = supply.vdd;)
(i:((1<<N)-1):dly[i].vdd = supply.vdd;)
(i:N:and2[i].vss = supply.vss;)
(i:N:mu2[i].vss = supply.vss;)
(i:((1<<N)-1):dly[i].vss = supply.vss;)
}
}}