濡備綍璋冩暣CAN浣嶅�藉�瑰繊搴︼紵

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CAN浣嶅�藉�瑰繊搴︽槸鎸囧湪鎺у埗鍣ㄥ眬鍩熺綉缁滐紙CAN, Controller Area Network锛変腑鍏佽�告椂閽熷悓姝ョ殑璇�宸�鑼冨洿銆傝繖鏄疌AN缃戠粶姝ｅ父閫氫俊鏃剁殑鍏抽敭鍥犵礌涔嬩竴锛屽洜涓篊AN鍗忚��渚濊禆浣嶅悓姝ユ潵纭�淇濆�氫釜鑺傜偣鍦ㄦ�荤嚎涓婃�ｇ‘瑙ｇ爜鏁版嵁銆�

CAN浣嶅�藉�瑰繊搴︾‘淇濊妭鐐逛箣闂寸敱浜庢椂閽熷亸宸�鎴栨姈鍔ㄨ�屽�艰嚧鐨勫井灏忔椂闂磋��宸�涓嶄細瀵艰嚧閫氫俊鏁呴殰銆�

CAN缃戠粶鐨勫悇涓�鑺傜偣閫氳繃瀹氭椂鍙傛暟灏嗕綅瀹斤紙bit width锛夊垝鍒嗕负鍑犱釜鏃堕棿娈碉紝绉颁负鏃堕棿閲忓瓙锛圱ime Quanta, TQ锛�銆備竴涓�瀹屾暣鐨凜AN浣嶇敱澶氫釜鏃堕棿閲忓瓙缁勬垚锛岄�氬父鍒嗕负4涓�闃舵�碉細

• 鍚屾�ユ�碉紙Synchronization Segment, Sync_Seg锛�: 鐢ㄤ簬妫�娴嬭竟娌垮悓姝ャ��
• 浼犳挱娈碉紙Propagation Segment, Prop_Seg锛�: 浼犳挱寤惰繜銆�
• 鐩镐綅缂撳啿娈�1锛圥hase Buffer Segment 1, Phase_Seg1锛�: 鐢ㄤ簬琛ュ伩浼犳挱寤惰繜鍜岃妭鐐规椂閽熺殑瀹瑰樊銆�
• 鐩镐綅缂撳啿娈�2锛圥hase Buffer Segment 2, Phase_Seg2锛�: 鐢ㄤ簬涓庡疄闄呮帴鏀跺埌鐨勮竟娌胯皟鏁村悓姝ャ��
  
  

鍦–AN缃戠粶涓�锛屼綅瀹藉�瑰繊搴︽槸鐢辩浉浣嶇紦鍐叉��1锛圥hase_Seg1锛夊拰鐩镐綅缂撳啿娈�2锛圥hase_Seg2锛夊喅瀹氱殑銆傝繖涓や釜娈电敤浜庤皟鏁存瘡涓�鑺傜偣鐨勬椂閽燂紝浣垮畠浠�淇濇寔鍚屾�ャ�侰AN鎺у埗鍣ㄥ彲浠ラ�氳繃璋冩暣杩欎簺娈电殑闀垮害鏉ヨˉ鍋挎椂閽熻��宸�锛岃繘鑰屽疄鐜板�逛綅瀹藉�瑰繊搴︾殑绠＄悊銆�

璋冩暣CAN浣嶅�藉�瑰繊搴︾殑鍏抽敭鏄�姝ｇ‘璁剧疆CAN瀹氭椂瀵勫瓨鍣ㄤ腑鐨勭浉鍏冲弬鏁般�備互涓嬫槸涓昏�佺殑瀹氭椂鍙傛暟锛�

• 鏃堕挓鍛ㄦ湡锛圱Q, Time Quanta锛�: 鍙�浠ラ�氳繃璋冩暣CAN鎺у埗鍣ㄧ殑鍒嗛�戝櫒鏉ヨ�剧疆涓�涓猅Q鐨勯暱搴︺��
• 鍚屾�ヨ烦杞�瀹藉害锛圫JW, Synchronization Jump Width锛�: 褰撴帴鏀跺埌鐨勮竟娌挎椂闂翠笌棰勬湡涓嶅悓姝ユ椂锛孲JW瀹氫箟浜嗗厑璁哥殑鏃堕棿璺宠穬鑼冨洿銆�
  澧炲ぇSJW鍙�浠ュ�瑰繊鏇村ぇ鐨勬椂閽熻��宸�銆�
• 鐩镐綅缂撳啿娈�1鍜岀浉浣嶇紦鍐叉��2鐨勯暱搴�: 杩欎簺娈电殑闀垮害瓒婂ぇ锛屽�瑰繊鐨勮��宸�鑼冨洿瓒婂ぇ锛屼絾涔熶細褰卞搷浼犺緭閫熷害銆�
  
  

璋冩暣CAN浣嶅�藉�瑰繊搴︾殑姝ラ�わ細

• 閫夋嫨CAN鎬荤嚎閫熷害锛氭�荤嚎閫熷害閫氬父鍙栧喅浜庣綉缁滀腑鐨勮妭鐐硅�佹眰鍜岀嚎缂嗛暱搴︼紙渚嬪�傦紝500 kbps 鎴� 1 Mbps锛夈��
• 璁剧疆鏃堕挓鍛ㄦ湡TQ锛氭牴鎹瓹AN鎺у埗鍣ㄦ椂閽熼�戠巼鍜屾�荤嚎閫熺巼鏉ヨ�＄畻姣忎綅鐨勬椂闂撮噺瀛愭暟銆傚叕寮忎负锛�
  
  

• 璋冩暣鍚屾�ヨ烦杞�瀹藉害SJW锛氶�氳繃璁剧疆鍚屾�ヨ烦杞�瀹藉害鏉ュ�瑰繊杈规部涓庨�勬湡浣嶇疆鐨勫亸绉汇�傚�傛灉缃戠粶涓�鑺傜偣鐨勬椂閽熷亸宸�杈冨ぇ锛屽彲浠ュ�炲姞SJW鐨勫�硷紝浠ュ厑璁告洿澶х殑鏃堕挓璺宠穬銆�
• 閰嶇疆鐩镐綅缂撳啿娈�锛氳皟鏁碢hase_Seg1鍜孭hase_Seg2鐨勯暱搴︼紝纭�淇濇椂閽熻��宸�鍦ㄥ彲鎺ュ彈鑼冨洿鍐呫�傚父瑙佺殑鍋氭硶鏄�璁㏄hase_Seg1鐨勯暱搴︾暐澶т簬Phase_Seg2锛屼互鎻愪緵鏇村ぇ鐨勬椂閽熻皟鏁磋兘鍔涖��
  
  

渚嬪�傦紝浣跨敤鐨凜AN鎺у埗鍣ㄦ椂閽熶负8 MHz锛岃�侀厤缃瓹AN鎬荤嚎鐨勯�熷害涓�500 kbps锛屽叿浣撴�ラ�ゅ�備笅锛�

1銆佹瘡浣嶇殑鏃堕棿閲忓瓙鏁帮紙TQ锛�锛欳AN閫熷害涓�500 kbps锛屽洜姝ゆ瘡浣嶅崰鐢ㄧ殑鏃堕棿涓猴細

杩欐剰鍛崇潃涓�浣嶇殑闀垮害搴斾负2寰�绉掋��

2銆�鏃堕挓鍛ㄦ湡锛�8 MHz鏃堕挓棰戠巼锛�1涓�鏃堕挓鍛ㄦ湡涓�125 ns銆傚垯涓�涓�浣嶉渶瑕佺殑鏃堕棿閲忓瓙鏁帮紙TQ锛変负锛�

3銆佽�剧疆鍚屾�ユ�靛拰鐩镐綅缂撳啿娈�锛氭牴鎹�鎬荤嚎閫熷害鍜岀綉缁滄潯浠讹紝璁剧疆鍚屾�ユ��1 TQ锛屼紶鎾�娈�6 TQ锛岀浉浣嶇紦鍐叉��1涓�4 TQ锛岀浉浣嶇紦鍐叉��2涓�3 TQ锛岃繖鏍峰氨鎻愪緵浜嗚冻澶熺殑鏃堕挓瀹瑰繊搴︺��

4銆佸悓姝ヨ烦杞�瀹藉害SJW锛氳�剧疆SJW涓�2 TQ锛屽�硅�稿皬鑼冨洿鐨勮烦璺冭皟鏁淬��

鍋囪�剧綉缁滀腑鏌愪簺鑺傜偣鐨勬椂閽熺簿搴﹁緝宸�锛屼负浜嗗�瑰繊杩欎簺鑺傜偣鐨勬椂閽熻��宸�锛屽彲浠ラ噰鍙栦互涓嬫帾鏂斤細

• 澧炲姞SJW鐨勫�藉害锛屼緥濡備粠2 TQ璋冩暣涓�4 TQ銆�
• 澧炲姞鐩镐綅缂撳啿娈�1鍜岀浉浣嶇紦鍐叉��2鐨勯暱搴︼紝浠ュ厑璁告洿澶氱殑鏃堕挓璋冩暣绌洪棿銆�
  渚嬪�傦紝灏嗙浉浣嶇紦鍐叉��1浠�4 TQ璋冩暣涓�6 TQ锛屽皢鐩镐綅缂撳啿娈�2浠�3 TQ璋冩暣涓�5 TQ銆�
  
  

杩欐牱鍙�浠ヨ繘涓�姝ュ�炲己瀵规椂閽熻��宸�鐨勫�瑰繊搴︼紝纭�淇濆湪鏈変竴瀹氭椂閽熷亸宸�鐨勮妭鐐逛腑浠嶇劧淇濇寔绋冲畾鐨勯�氫俊銆�