瀹炵幇鍔熻兘锛?/p>
FPGA
閲屽疄鐜颁粠
PC
涓插彛鎺ユ敹鏁版嵁锛?/p>
鎺ョ潃鎶婃帴鏀跺埌鐨勬暟鎹彂鍥炲幓銆?/p>
娉㈢壒鐜囧彲閫?/p>
9600bps,
鍙皟
1bit
璧峰浣嶏紝
8bit
鏁版嵁锛?/p>
1bit
鍋滄浣嶏紝鏃犳牎楠屼綅銆?/p>
鍙傝�冦�?/p>
VHDL
纭欢鎻忚堪璇█涓庡拰鏁板瓧閫昏緫鐢佃矾璁捐銆?/p>
妯″潡浠嬬粛濡備笅
涓�銆佷覆鍙ｆ暟鎹帴鏀舵ā鍧楋細
鐗瑰埆娉ㄦ剰涓�涓暟鎹綅鍗?/p>
4
涓?/p>
clk_bps_4
鏃堕挓鍛ㄦ湡銆?/p>
涓插彛鏁版嵁鎺ユ敹鎺у埗
褰撴暟鎹帴鏀剁
rxd
鍑虹幇璧峰浣嶄綆鐢靛钩锛?/p>
鍚姩鎺ユ敹鎺у埗璁℃暟鍣?/p>
rx_cnt,
缃綅涓?/p>
8鈥檅0111_00(28),
鍗?/p>
rx_cnt[5:2]== 4鈥檅0111(7),rx_cnt[1:0] == 2'b00(0);
涓�涓鏁板懆鏈熷紑濮嬶紝浼撮殢
clk_bps_4,
rx_cnt
鍔?/p>
1
锛堟瘡涓�涓暟鎹綅鍔?/p>
4
锛?/p>
涓插彛鎺ユ敹鏁版嵁绉讳綅鎺у埗
(
鍏抽敭閲囨牱鐐圭殑閫夊彇
)
姣忓綋
rx_cnt[1:0] == 2'b01,
涓轰簡淇濊瘉鍦?/p>
rxd
涓�浣嶆暟鎹潬杩戜腑闂翠綅缃噰鏍凤紱
姣?/p>
4
涓?/p>
clk_bps_4,
rx_cnt[5:2]
鍔?/p>
1
褰?/p>
rx_cnt[5:2] == 8,9,10鈥?15
锛屽畬鎴?/p>
8
浣嶇殑鏁版嵁閲囨牱锛屼覆骞跺彉鎹?/p>
缃綅鏍囧織浣?/p>
rxdF
鏁版嵁鎺ユ敹鏍囧織
rxd
鍑虹幇璧峰浣嶄綆鐢靛钩
, rxdF
缃?/p>
1
锛岃〃绀烘暟鎹帴鏀跺紑濮嬶紱褰?/p>
rx_cnt
璁℃暟鍒?/p>
8鈥檅1111_11(63),
鏁版嵁鎺ユ敹瀹屾垚锛?/p>
rxdF
缃?/p>
0
缃綅鏍囧織浣?/p>
rdFULL;//
鎺ユ敹閿佸瓨鍣ㄦ弧鏍囧織
绌洪棽鏃?/p>
rdFULL
缃?/p>
0
锛屽綋鏁版嵁鎺ユ敹瀹屾垚锛屾暟鎹攣瀛樺埌
do_latch,
鍚屾椂
rdFULL
缃?/p>
1,
鍚戜笂灞傛ā
鍧楄〃绀烘暟鎹互鍑嗗
OK
锛屽彲浠ユ潵璇诲彇锛?/p>
rd
缃?/p>
0
锛岃〃绀轰笂灞傛ā鍧楀紑濮嬭鍙栨暟鎹紝
rdFULL
缃?/p>
0
锛岃〃
绀烘暟鎹凡璇昏蛋
浜屻�佷覆鍙ｆ暟鎹彂閫佹ā鍧楋細
鏁版嵁鍙戦�佷緷璧栦簬
wr
锛堜綆鐢靛钩鏈夋晥锛?/p>
绌洪棽鏃?/p>
wr
缃?/p>
1
锛屾暟鎹彂閫佹椂
wr
浜х敓浣庣數骞宠剦鍐诧紝
wr
涓婂崌娌垮皢鏁版嵁閿佸瓨鍒?/p>
din_latch;
涓插彛鏁版嵁鍙戦�佹帶鍒讹細
wr
鐢?/p>
0
璺冲彉涓?/p>
1
鍚庯紝鍚姩鍙戦�佹帶鍒惰鏁板櫒
tx_cnt,
缃綅涓?/p>
8鈥檅0111_00(28),
鍗?/p>
tx_cnt[5:2]== 4鈥檅0111(7), tx_cnt[1:0] == 2'b00(0);
涓�涓鏁板懆鏈熷紑濮嬶紝浼撮殢
clk_bps_4,
tx_cnt
鍔?/p>
1
锛堟瘡涓�涓暟鎹綅鍔?/p>
4
锛?/p>
涓插彛鍙戦�佹暟鎹Щ浣嶆帶鍒?/p>
