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直接key怕按錯的話會消失, 所以分段key- H! l, q4 O3 \7 {
1 q) P& w1 a4 X) {3 m( Q; S
Read buffer部分
" v- a0 U4 c( p+ H* a1 n5 @: Y* q+ \4 w3 z5 ~5 C3 {& w
--read_buffer
# }! x/ D( d- |# }# h4 dwith rptr(3 downto 0) select rdata <=
9 K) A1 o# Z8 p6 ]. Y) ]# v fifo(0) when "0000",
# v2 \1 V9 |4 i) ~ fifo(1) when "0001",, M: D0 u* K9 }/ ^( d9 ?% j1 Q
fifo(2) when "0010",5 H, h4 w. d( d: N: H
fifo(3) when "0011",0 X$ a5 N* J% @" l) {, K% [, ]
fifo(4) when "0100",$ O% a9 U" L; ^. P" u
fifo(5) when "0101",
( U" I" w0 Z8 j9 @; c7 C! O fifo(6) when "0110",6 J0 t c' p6 P* R
fifo(7) when "0111",
: [8 X4 I2 I% E! \- G fifo(8) when "1000",3 p, G, k ? n% U G- D
fifo(9) when "1001",/ `* ^, Z! z# q2 H' `2 |
fifo(10) when "1010",* B% G' I6 W7 c; B! s2 {
fifo(11)when "1011",
. l, s+ K; @1 d( f0 i, j fifo(12) when "1100",: ?( g. V* |0 }3 z0 A1 u
fifo(13) when "1101",9 [. p9 A2 u: v& T6 i1 Y
fifo(14) when "1110",5 z" O S- _. V& o) [8 C, J
fifo(15) when others; |
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