1 寮曡█
鍦╢f銆乴onworks銆乸rofibus銆乧an銆乭art绛変富娴佺従(xi脿n)鍫�(ch菐ng)绺界窔宸ユキ(y猫)閫氳▕鎶€琛�(sh霉)涔嬩腑锛宑an锛坈ontroller area network锛屽張绋�(ch膿ng)鎺у埗鍣ㄥ眬鍩熺恫(w菐ng)锛夌附绶氶櫎浜嗗叿鍌欑従(xi脿n)鍫�(ch菐ng)绺界窔鐨勯枊(k膩i)鏀惧紡銆佷簰鎿嶄綔鎬�銆佹暩(sh霉)瀛楀寲閫氳▕绛夌壒榛�(di菐n)澶�锛岄倓鍏锋湁浠ヤ笅鐗归粸(di菐n)锛氾紙1锛変互澶氫富姗�(j墨)鏂瑰紡宸ヤ綔锛涳紙2锛塩an涓婄殑绡€(ji茅)榛�(di菐n)淇℃伅鍒嗕笉鍚岀殑鍎�(y艒u)鍏堢礆(j铆)锛屽彲婊�(m菐n)瓒充笉鍚岀殑瀵�(sh铆)鏅�(sh铆)瑕佹眰锛涳紙3锛夐噰鐢ㄩ潪鐮村鎬х附绶氫徊瑁佹妧琛�(sh霉)锛岀瘈(ji茅)鐪佷簡绺界窔娌栫獊浠茶鏅�(sh铆)闁�锛涳紙4锛夐噰鐢ㄧ煭骞€绲�(ji茅)妲�(g貌u)锛屽偝杓告檪(sh铆)闁撶煭锛屽彈骞叉摼鐜囬檷浣�锛屽叿鏈夋サ濂界殑妾㈤尟(cu貌)鏁堟灉锛涳紙5锛夋瘡骞€淇℃伅閮芥湁crc鏍¢(y脿n)鍙婂叾瀹冩閷�(cu貌)鎺柦锛屾暩(sh霉)鎿�(j霉)鍑洪尟(cu貌)鐜囨サ浣�锛涳紙6锛夐€氫俊浠嬭唱(zh矛)鍙潏娲诲湴閬告搰锛涳紙7锛塩an涓婄殑绡€(ji茅)榛�(di菐n)鏁�(sh霉)楂橀仈(d谩)110鍊�(g猫)锛涳紙8锛夋湁寰堥珮鐨勫彲闈犳€у拰鎬ц兘鍍�(ji脿)鏍兼瘮绛�銆俢an绺界窔鐨勯€欎簺鐗归粸(di菐n)浣垮緱鍏惰兘鍚屾檪(sh铆)婊�(m菐n)瓒抽亷(gu貌)绋嬫帶鍒跺拰鍒堕€犳キ(y猫)鑷嫊(d貌ng)鍖栫殑闇€姹�锛屽洜鑰宑an绺界窔鐨勭爺绌惰垏鎳�(y墨ng)鐢ㄥ凡鎴愮偤宸ユキ(y猫)鏁�(sh霉)鎿�(j霉)绺界窔闋�(l菒ng)鍩熺殑鐔遍粸(di菐n)銆傚湪绺界窔绯荤当(t菕ng)涓�锛屽偝绲�(t菕ng)鐨�4-20ma鐨勬ā鎿几鍏ヤ俊铏�(h脿o)琚暩(sh霉)瀛椾俊铏�(h脿o)鍙栦唬锛岃ō(sh猫)鍌欑媭鎱�(t脿i)銆佹晠闅溿€佸弮鏁�(sh霉)绛変俊鎭€氶亷(gu貌)鐝�(xi脿n)鍫�(ch菐ng)绺界窔鍌抽€佺郸涓婁綅姗�(j墨)瀹屾垚閬�(yu菐n)绋嬫帶鍒跺強閬�(yu菐n)绋嬪弮鏁�(sh霉)鍖�锛屽叿鏈塩an绺界窔鎺ュ彛鐨勫悇绋剙鍣ㄣ€佸剙琛ㄨō(sh猫)鍌欓€氶亷(gu貌)can閬╅厤鍗″彲瀵�(sh铆)鐝�(xi脿n)鑸囦笂浣嶆(j墨)鐨刢an绺界窔閫氳▕銆�
2 纭欢瑷�(sh猫)瑷�(j矛)
can閫氫俊鐨勬牳蹇冭姱鐗囨槸can鎺у埗鍣紝can鐨勯€氫俊鍗�(xi茅)璀颁富瑕佹槸鐢卞畠瀹屾垚鐨�锛屽畠鍙互瀵�(sh铆)鐝�(xi脿n)鐗╃悊灞ゅ拰鏁�(sh霉)鎿�(j霉)閺堣矾灞ょ殑鎵€鏈夊姛鑳姐€俢an鎺у埗鍣ㄦ湁瑷卞鑺墖绲�(ji茅)妲�(g貌u)锛岀崹(d煤)绔嬭姱鐗囩殑渚嬪philips鐨剆ja1000锛岃タ闁€(m茅n)瀛愮殑82c900绛�锛岄倓鏈夊拰寰檿鐞嗗櫒鍋氬湪涓€璧风殑宓屽叆鍨嬬祼(ji茅)妲�(g貌u)銆傛湰闋�(xi脿ng)鐩牴鎿�(j霉)鏅鸿兘鍖栥€佸彲闈犳€ч珮銆佹姉骞叉摼鑳藉姏寮�(qi谩ng)銆佹垚鏈綆绛夊師鍓�锛宑an鎺у埗鍣ㄩ噰鐢╩icrochip鍏徃鐨刾ic18f458鍠墖姗�(j墨)鍏�(n猫i)宓宑an鎺у埗鍣ㄦ柟妗堛€俻ic18f458鍔熻兘寮�(qi谩ng)澶�,1536k鐗囧収(n猫i)鏁�(sh霉)鎿�(j霉)ram銆�3鍊�(g猫)16浣嶅畾鏅�(sh铆)/瑷�(j矛)鏁�(sh霉)鍣�銆�1鍊�(g猫)8浣嶇湅闁€(m茅n)鐙梬dt瀹氭檪(sh铆)鍣�銆�8璺ā鎿几鍏ョ殑鐗囧収(n猫i)adc?锛熸挳T(m茅n)鐙梬dt瀹氭檪(sh铆)鍣ㄧ敤渚�(l谩i)鐩�(ji膩n)瑕栫▼搴忕殑閬�(y霉n)琛岀媭鎱�(t脿i)锛屼竴鏃pu鐢变簬鎰忓鍘熷洜鍋忛洟姝e父绋嬪簭涔嬪锛寃dt灏囧挤(qi谩ng)琛屾妸cpu寰�(f霉)浣嶏紝浣垮叾杩斿洖姝e父绋嬪簭銆俻ic18f458can妯″闄ら伒寰猚an绺界窔鐨勫崝(xi茅)璀�锛屽悓鏅�(sh铆)涔熸湁鑷繁鐨勭壒榛�(di菐n)锛屼富瑕佸寘鎷細锛�1锛夋敮鎸乧an鍗�(xi茅)璀癱an2.0a銆乧an2.0b锛涳紙2锛夋敮鎸佹(bi膩o)婧�(zh菙n)骞€銆佹摯(ku貌)灞曞箑銆侀仩(yu菐n)绋嬪箑銆侀亷(gu貌)杓夊箑銆侀尟(cu貌)瑾ゅ箑绛夛紱锛�3锛�2鍊�(g猫)鎺ユ敹绶╂矕鍣�銆�3鍊�(g猫)鐧�(f膩)閫佺珐娌栧櫒锛涳紙4锛�6鍊�(g猫)鎺ユ敹閬�(gu貌)婵惧櫒锛涳紙5锛�2鍊�(g猫)灞忚斀閬�(gu貌)婵惧櫒銆傞伕鐢ㄥ姛鑳藉挤(qi谩ng)澶х殑pic18f458鍠墖姗�(j墨)锛屽ぇ澶х啊(ji菐n)鍖栦簡闆昏矾瑷�(sh猫)瑷�(j矛)锛岀瘈(ji茅)鐪佷簡鎴愭湰銆�
can鏀剁櫦(f膩)鍣ㄥ嵆绺界窔椹�(q奴)鍕�(d貌ng)鍣ㄦ槸can鎺у埗鍣ㄨ垏鐗╃悊绺界窔涔嬮枔鐨勬帴鍙�锛屽彲浠ユ彁渚涘皪(du矛)绺界窔鐨勫樊鍕�(d貌ng)鐧�(f膩)閫佸拰鎺ュ彈鍔熻兘锛宑an绺界窔椹�(q奴)鍕�(d貌ng)鍣ㄧó椤�(l猫i)鏈�82c250/251銆乼ja1040銆乼ja1050绛夊绋�锛岄仼鐢ㄤ簬涓嶅悓鍫�(ch菐ng)鍚�銆俻hilips鍏徃鐨勯珮閫熺附绶氶﹨(q奴)鍕�(d貌ng)鍣�82c50锛屽畠閲囩敤闆欑窔宸垎椹�(q奴)鍕�(d貌ng)锛屾姉骞叉摼寮�(qi谩ng)銆俢an绺界窔椹�(q奴)鍕�(d貌ng)鍣ㄨ垏鍠墖姗�(j墨)鎺ョ窔濡傚湒1鎵€绀�锛岀偤瀵�(sh铆)鐝�(xi脿n)绺界窔涓婄瘈(ji茅)榛�(di菐n)涔嬮枔鐨勯浕姘i殧闆� can椹�(q奴)鍕�(d貌ng)鍣ㄩ€氶亷(gu貌)楂橀€熷厜钘�6n137鑸噋ic18f458閫�(j矛n)琛岀浉閫c€傚湪can绺界窔鍏╃鐨刢an鎺ラ牠涓婃帴鍏�120姝愬尮閰嶉浕闃�锛屼互娑堥櫎闃绘姉涓嶉€g簩(x霉)鏅�(sh铆)鐨勫弽灏勭従(xi脿n)璞�锛岀附绶氳垏鍦板悇鑷苟鑱�(li谩n)涓€鍊�(g猫)30pf鐨勫皬闆诲,浠ラ槻闆荤杓诲皠鍜屾姉楂橀牷骞叉摼銆傛敞鎰忓湪瀵�(sh铆)闅涙噳(y墨ng)鐢ㄤ腑锛岀瘈(ji茅)榛�(di菐n)涔嬮枔鐨勯浕婧愪篃瑕侀殧闆紝+5v闅旈洟鍚庢墠鑳芥帴vcc锛屽惁鍓囦篃鏈�(hu矛)鏈夊共鎿俱€�
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3 杌熶欢瑷�(sh猫)瑷�(j矛)
杌熶欢閲囩敤mplab ide7.5闁�(k膩i)鐧�(f膩)骞宠嚭(t谩i)鍙妋cc18杌熶欢锛岀偤浜嗘湁鍒╀簬绋嬪簭鐨勭Щ妞嶅拰淇敼鍙皣绋嬪簭瑷�(sh猫)瑷�(j矛)鎴愯兘鐩稿皪(du矛)鐛�(d煤)绔嬬殑瀛愮▼搴�銆俢an绺界窔鐨勫悇绋崝(xi茅)璀板凡缍�(j墨ng)琚泦鎴愬湪pic18f458鐨刢an妯″閲岄潰,鍙灏�(du矛)鐩告噳(y墨ng)鐨勫瘎瀛樺櫒閫�(j矛n)琛屾搷浣滃氨鍙畬鎴恈an绯荤当(t菕ng)閫氫俊銆俻ici8f458鐨刢an閫氫俊绋嬪簭涓昏鍖呮嫭can鍒濆鍖�銆佹帴鍙楀瓙绋嬪簭銆佺櫦(f膩)閫佸瓙绋嬪簭绛�銆俢an鍒濆鍖栦富瑕佸皪(du矛)can閫�(j矛n)琛岄厤缃�锛岃ō(sh猫)缃櫦(f膩)閫侀兊绠便€佹帴鏀堕兊绠辨(bi膩o)璀�(sh铆)绗﹀強鍒濆鍖栨暩(sh霉)鎿�(j霉)锛岃ō(sh猫)缃尝鐗圭巼銆乧an宸ヤ綔妯″紡锛屽垵濮嬪寲鎺ュ彈婵炬尝鍣ㄥ拰鎺ュ彈灞忚斀銆傛帴鍙椾娇鐢ㄤ腑鏂锋柟寮�锛岀櫦(f膩)閫侀噰鐢ㄦ煡瑭�(x煤n)鏂瑰紡銆傚湪can绺界窔涓婄殑鎵€鏈夌瘈(ji茅)榛�(di菐n)蹇呴爤鏈夌浉鍚岀殑娉㈢壒鐜�,瑷�(sh猫)娉㈢壒鐜噁osc=4mhz锛屽悓姝ユ檪(sh铆)闁撴sync_seg=1tq锛屽偝杓告檪(sh铆)闁撴prop_seg=1tq锛岀浉浣嶇珐娌栨檪(sh铆)闁撴1phase_seg1=3tq锛岀浉浣嶇珐娌栨檪(sh铆)闁撴2phase_seg2=3tq锛屾(bi膩o)绋�(ch膿ng)浣嶆檪(sh铆)闁�=8tq锛屼綅鐜�=0.125mhz銆傚湪can绺界窔閫氳▕涓�锛宑an鐨勫垵濮嬪寲闈炲父閲嶈銆�
3.1 can鍒濆鍖栧瓙绋嬪簭
銆€銆€void intcan锛堬級
銆€?銆傞勾risb=锛坱risb|0x08锛�&0xfb锛� /锛� 瑷�(sh猫)缃畆b2鐐鸿几鍑�锛宺b3鐐鸿几鍏ワ紛/
銆€銆€cancon=0x80锛� /锛婅珛(q菒ng)姹傞厤缃紛/
銆€銆€while锛堬紙canstat&0x80锛�==0锛� /锛婇厤缃柟寮忥紛/
銆€?銆�?
銆€銆€锛�
銆€銆€锝� /锛婄瓑寰呴€�(j矛n)鍏ラ厤缃ā寮忥紛/
銆€銆€brgcon1=0x01锛� /锛婅ō(sh猫)缃尝鐗圭巼锛�/
銆€銆€brgcon2=0x90锛�
銆€銆€brgcon3=0x42锛�
銆€銆€txb0con=0x03锛� /锛婅ō(sh猫)缃劒(y艒u)鍏堢礆(j铆)锛�/
銆€銆€txb0sidl=can_biaosf_l&0xe0锛� /锛婃(bi膩o)婧�(zh菙n)妯�(bi膩o)璀�(sh铆)绗︼紛/
銆€銆€txb0sidh= can_ biaosf _h 锛�
銆€銆€txb0dlc=0x08锛� /锛婃暩(sh霉)鎿�(j霉)闀�(zh菐ng)搴�1瀛楃瘈(ji茅)锛�/
銆€銆€txb0d0=0x00锛�
銆€銆€txb0d1=0x00锛�
銆€銆€rxb0sidl= can_ biaosf _l&0xe0锛�/锛婃(bi膩o)婧�(zh菙n)妯�(bi膩o)璀�(sh铆)绗︼紛/
銆€銆€rxb0sidh= can_ biaosf _h 锛�
銆€銆€rxb0con=0x20锛� / 锛婃帴鍙楁湁鏁堢殑妯�(bi膩o)婧�(zh菙n)妯�(bi膩o)璀�(sh铆)绗︿俊鎭紛/
銆€銆€rxb0dlc=0x08锛� /锛婃暩(sh霉)鎿�(j霉)闀�(zh菐ng)搴�1瀛楃瘈(ji茅)锛�/
銆€銆€rxb0d0=0x00锛� /锛婂垵濮嬫暩(sh霉)鎿�(j霉)锛�/
銆€銆€rxb0d1=0x00锛�
銆€銆€rxb0d2=0x00锛�
銆€銆€rxf0sidh=can_ biaosf _h锛�/锛婂垵濮嬪寲鎺ュ彈婵炬尝鍣ㄥ拰鎺ュ彈灞忚斀锛�/
銆€銆€rxf0sidl=can_ biaosf _l锛�
銆€銆€rxm0sidh=0xff锛�
銆€銆€rxm0sidl=0xe0锛�
銆€銆€cancon=0x40锛� /锛婃甯告ā寮忥紛/
銆€銆€while锛堬紙canstat&0x40锛�!=0锛� /锛婃娓�(c猫)閰嶇疆瀹屾垚锛�/
銆€?銆�?
銆€?銆�?
銆€?銆�?
銆€銆€pir3=0x00锛� /锛婂垵濮嬪寲can涓柗锛�/
銆€銆€pie3=0x01锛�
銆€銆€ipr3=0x01锛�
銆€?銆�?
3.2 鎺ユ敹涓柗瀛愮▼搴�
銆€銆€void interruphandlerhigh锛堬級
銆€銆€锝�
銆€銆€if锛坧ir3bits.rxb0if==1锛� /锛婃帴鏀禼an涓柗锛�/
銆€銆€ 锝�
銆€銆€ can_flag=1锛� /锛婄疆鎺ユ敹涓柗妯�(bi膩o)蹇楋紛/
銆€銆€ pir3bits.rxb0if=0锛� /锛婃竻鎺ユ敹涓柗妯�(bi膩o)蹇楋紛/
銆€銆€rxb0conbits.rxful=0锛� /锛婃帴鏀讹紛/
銆€銆€锝�
銆€?銆�?
3.3 鐧�(f膩)閫佸瓙绋嬪簭
銆€銆€void fasong锛堬級
銆€銆€txb0d0=clz锛� /锛奵lz鐐虹櫦(f膩)閫佹暩(sh霉)鍊硷紛/
銆€銆€txb0con=txb0con|0x08锛� /锛婄櫦(f膩)閫侊紛/
銆€銆€锝�
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