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单片机程序设计实践教程_第13章_简易数字信号发生器1绗崄涓夎绗崄涓夎绗崄涓夎绗崄涓夎绗崄涓夎绗崄涓夎绗崄涓夎绗崄涓夎绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒13.013.013.013.013.013.013.013.0椤圭洰婕旂ず鏁堟灉椤圭洰婕旂ず鏁堟灉椤圭洰婕旂ず鏁堟灉椤圭洰婕旂ず鏁堟灉椤圭洰婕旂ず鏁堟灉椤圭洰婕旂ず鏁堟灉椤圭洰婕旂ず鏁堟灉椤圭洰婕旂ず鏁堟灉2鍥惧浘鍥惧浘XP_13_01XP_13_01XP_13_01XP_13_01姝ラ姝ラ姝ラ姝ラ1111----鎻掓帴鐭帴鐗囪繛鎺ョず娉㈠櫒鎺㈤拡鎻掓帴鐭帴鐗囪繛鎺ョず娉㈠櫒鎺㈤拡鎻掓帴鐭帴鐗囪繛鎺ョず娉㈠櫒鎺㈤拡鎻掓帴鐭帴鐗囪繛鎺ョず娉㈠櫒鎺㈤拡3鍥惧浘鍥惧浘XP_13_02XP_13_02XP_13_02XP_13_02姝ラ姝ラ姝ラ姝ラ2222----寮€鏈哄悗绯荤粺榛樿杩涘叆姝ｅ鸡娉㈠彂鐢熸ā寮忓紑鏈哄悗绯荤粺榛樿杩涘叆姝ｅ鸡娉㈠彂鐢熸ā寮忓紑鏈哄悗绯荤粺榛樿杩涘叆姝ｅ鸡娉㈠彂鐢熸ā寮忓紑鏈哄悗绯荤粺榛樿杩涘叆姝ｅ鸡娉㈠彂鐢熸ā寮?4鍥惧浘鍥惧浘XP_13_03XP_13_03XP_13_03XP_13_03姝ラ姝ラ姝ラ姝ラ3333----绯荤粺鐨勪笁瑙掓尝鍙戠敓妯″紡绯荤粺鐨勪笁瑙掓尝鍙戠敓妯″紡绯荤粺鐨勪笁瑙掓尝鍙戠敓妯″紡绯荤粺鐨勪笁瑙掓尝鍙戠敓妯″紡5鍥惧浘鍥惧浘XP_13_04XP_13_04XP_13_04XP_13_04姝ラ姝ラ姝ラ姝ラ4444----绯荤粺鐨勯敮榻挎尝鍙戠敓妯″紡绯荤粺鐨勯敮榻挎尝鍙戠敓妯″紡绯荤粺鐨勯敮榻挎尝鍙戠敓妯″紡绯荤粺鐨勯敮榻挎尝鍙戠敓妯″紡6鍥惧浘鍥惧浘XP_13_05XP_13_05XP_13_05XP_13_05姝ラ姝ラ姝ラ姝ラ5555----n绯荤粺鐨勬柟娉㈠彂鐢熸ā寮忕郴缁熺殑鏂规尝鍙戠敓妯″紡绯荤粺鐨勬柟娉㈠彂鐢熸ā寮忕郴缁熺殑鏂规尝鍙戠敓妯″紡13.113.113.113.113.113.113.113.1椤圭洰鐩爣璁捐椤圭洰鐩爣璁捐椤圭洰鐩爣璁捐椤圭洰鐩爣璁捐椤圭洰鐩爣璁捐椤圭洰鐩爣璁捐椤圭洰鐩爣璁捐椤圭洰鐩爣璁捐1.鎺屾彙DAC0832鐨勫伐浣滃師鐞嗗拰鎺у埗鏂瑰紡锛?.鐔熺粌鎺屾彙STC89C52RC鐨勬€荤嚎鎺у埗鏂规硶锛?.鎺屾彙绀烘尝鍣ㄧ殑鍩烘湰浣跨敤鏂规硶锛?3.鎺屾彙绀烘尝鍣ㄧ殑鍩烘湰浣跨敤鏂规硶锛?.鐞嗚В缁欏嚭鐨凜璇█婧愮▼搴忕殑缁撴瀯鍜屽悇璇彞鎵€璧蜂綔鐢紱5.鍦ㄨ揪鍒颁互涓婂洓鐐圭洰鏍囦箣鍚庯紝鏍规嵁鏈珷鈥滈」鐩墿灞曚换鍔♀€濅腑鎻愬嚭鐨勯棶棰橈紝浠ョ粍鎴栦釜浜轰负鍗曚綅锛屽湪瑙勫畾鏃堕棿閲屽畬鎴愭墿灞曢」鐩换鍔°€?13.213.213.213.213.213.213.213.2椤圭洰浠诲姟椤圭洰浠诲姟椤圭洰浠诲姟椤圭洰浠诲姟椤圭洰浠诲姟椤圭洰浠诲姟椤圭洰浠诲姟椤圭洰浠诲姟8鍥惧浘鍥惧浘13131313----1111绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭數璺師鐞嗗浘绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭數璺師鐞嗗浘绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭數璺師鐞嗗浘绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭數璺師鐞嗗浘n绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭數璺師鐞嗗浘濡傚浘13-1鎵€绀猴紝绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒涓昏鏄€熷姪浜嶥AC0832鏁版ā杞崲鑺墖鏉ュ疄鐜般€傛暟瀛楅噺鐢盨TC89C52RC缁欏嚭锛岄€氳繃DAC0832杞崲涓烘ā鎷熼噺骞剁敱鍙傝€冪數鍘媀rbf绔緭鍑恒€傞€氳繃绀烘尝鍣紝鍙互瑙傛祴鍒扮敱DAC0832鐨?鑴氫骇鐢熺殑4绉嶆尝褰紝杩?绉嶆尝褰㈠垎鍒负姝ｅ鸡娉€佷笁瑙掓尝銆侀敮榻挎尝鍜屾柟娉€傚彲浠ラ€氳繃寮€鍙戞澘涓婄殑鎸夐敭S2銆丼3鍜孲4閫夋嫨涓夎娉€侀敮榻挎尝鍜屾柟娉㈢殑杈撳嚭娉㈠舰锛孲1銆丼5锝濻16涓烘寮︽尝閫夋嫨鎸夐敭锛岀▼搴忓簲瀹炵幇鎸夊帇S1锝濻16閿椂锛屽湪鏁扮爜绠＄殑1鍜?浣嶇疆鏄剧ず鐩稿簲閿€笺€傚嵆锛?2浣嶇疆鏄剧ず鐩稿簲閿€笺€傚嵆锛屄仿仿仿锋寜鍘婼1锝濻16閿紝鏁扮爜绠?鍜?浣嶇疆鏄剧ず'01'锛屽鎺ョ瀛怞3鐨?鑴氳緭鍑烘寮︽尝銆偮仿仿仿锋寜鍘婼2閿紝鏁扮爜绠?鍜?浣嶇疆鏄剧ず'02'锛屽鎺ョ瀛怞3鐨?鑴氳緭鍑轰笁瑙掓尝銆偮仿仿仿锋寜鍘婼3閿紝鏁扮爜绠?鍜?浣嶇疆鏄剧ず'03'锛屽鎺ョ瀛怞3鐨?鑴氳緭鍑洪敮榻挎尝銆偮仿仿仿锋寜鍘婼4閿紝鏁扮爜绠?鍜?浣嶇疆鏄剧ず'04'锛屽鎺ョ瀛怞3鐨?鑴氳緭鍑烘柟娉€傚鎺ョ瀛怞3鐨?鑴氳緭鍑烘尝褰㈠彲浠ラ€氳繃寮曞叆绀烘尝鍣ㄦ潵妫€娴嬪拰瑙傚療锛岃璇昏€呭湪椤圭洰瀹炶返鍓嶅噯澶囧ソ绀烘尝鍣ㄣ€?13.313.313.313.313.313.313.313.3绯荤粺鏉夸笂纭欢杩炵嚎绯荤粺鏉夸笂纭欢杩炵嚎绯荤粺鏉夸笂纭欢杩炵嚎绯荤粺鏉夸笂纭欢杩炵嚎绯荤粺鏉夸笂纭欢杩炵嚎绯荤粺鏉夸笂纭欢杩炵嚎绯荤粺鏉夸笂纭欢杩炵嚎绯荤粺鏉夸笂纭欢杩炵嚎绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勮繛鎺ユ彃绾胯缃鍥?3-2銆?0鍥惧浘鍥惧浘13131313----2222绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勮繛鎺ユ彃绾胯缃畝鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勮繛鎺ユ彃绾胯缃畝鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勮繛鎺ユ彃绾胯缃畝鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勮繛鎺ユ彃绾胯缃?13.413.413.413.413.413.413.413.4绋嬪簭娴佺▼鍥剧▼搴忔祦绋嬪浘绋嬪簭娴佺▼鍥剧▼搴忔祦绋嬪浘绋嬪簭娴佺▼鍥剧▼搴忔祦绋嬪浘绋嬪簭娴佺▼鍥剧▼搴忔祦绋嬪浘11鍥惧浘鍥惧浘13131313----3333绠€鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭畝鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭畝鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨勭畝鏄撴暟瀛椾俊鍙峰彂鐢熷櫒椤圭洰鐨凜CCC璇█绋嬪簭娴佺▼鍥捐瑷€绋嬪簭娴佺▼鍥捐瑷€绋嬪簭娴佺▼鍥捐瑷€绋嬪簭娴佺▼鍥?13.5C13.5C13.5C13.5C13.5C13.5C13.5C13.5nC璇█婧愮▼搴忚瑷€婧愮▼搴忚瑷€婧愮▼搴忚瑷€婧愮▼搴忥紙锛堬紙锛堢暐鐣ョ暐鐣ワ級锛夛級锛夎瑷€婧愮▼搴忚瑷€婧愮▼搴忚瑷€婧愮▼搴忚瑷€婧愮▼搴忥紙锛堬紙锛堢暐鐣ョ暐鐣ワ級锛夛級锛?3.613.613.613.613.613.613.613.6绯荤粺鏋勬垚鍜岀▼搴忓垎鏋愮郴缁熸瀯鎴愬拰绋嬪簭鍒嗘瀽绯荤粺鏋勬垚鍜岀▼搴忓垎鏋愮郴缁熸瀯鎴愬拰绋嬪簭鍒嗘瀽绯荤粺鏋勬垚鍜岀▼搴忓垎鏋愮郴缁熸瀯鎴愬拰绋嬪簭鍒嗘瀽绯荤粺鏋勬垚鍜岀▼搴忓垎鏋愮郴缁熸瀯鎴愬拰绋嬪簭鍒嗘瀽13.6.113.6.113.6.113.6.1DAC0832DAC0832DAC0832DAC0832鍐呴儴寮曡剼鍔熻兘鍜屽彈鎺ф柟寮忓唴閮ㄥ紩鑴氬姛鑳藉拰鍙楁帶鏂瑰紡鍐呴儴寮曡剼鍔熻兘鍜屽彈鎺ф柟寮忓唴閮ㄥ紩鑴氬姛鑳藉拰鍙楁帶鏂瑰紡DAC0832鏄?浣嶇殑D/A杞崲鍣紝CMOS宸ヨ壓锛岃姱鐗囧唴鏈塕-2R姊舰鐢甸樆缃戠粶锛岀敤浜庡鍙傝€冪數鍘嬩骇鐢熺殑鐢垫祦杩涜鍒嗘祦瀹屾垚妯℃暟杞崲锛岃浆鎹㈢粨鏋滀互涓€缁勫樊鍔ㄧ數娴両OUT鍜孖OUT杈撳嚭銆?2妯℃暟杞崲锛岃浆鎹㈢粨鏋滀互涓€缁勫樊鍔ㄧ數娴両OUT1鍜孖OUT2杈撳嚭銆備互涓嬩负DAC0832鐨勪富瑕佸弬鏁帮細鈥⑩€⑩€⑩€㈠垎杈ㄧ巼8浣嶃€傗€⑩€⑩€⑩€/A杞崲鏃堕棿1渭s銆傗€⑩€⑩€⑩€㈠弬鑰冪數鍘嬶紙Verf锛変负锛?0锝?10V銆傗€⑩€⑩€⑩€㈠崟鐢垫簮+5锝?15V渚涚數銆傗€⑩€⑩€⑩€㈡弧閲忕▼璇樊涓猴紞1锝?11LSB锛屽叾涓?LSB涓篤ref1/2n锛坣鏄疍/A杞崲鐨勫垎杈ㄧ巼锛屾澶勪负8浣嶏級銆?13鍥惧浘鍥惧浘13131313----4DAC08324DAC08324DAC08324DAC0832鍐呴儴缁撴瀯鍜屽紩鑴氬姛鑳藉唴閮ㄧ粨鏋勫拰寮曡剼鍔熻兘鍐呴儴缁撴瀯鍜屽紩鑴氬姛鑳藉唴閮ㄧ粨鏋勫拰寮曡剼鍔熻兘nDAC0832鏄?0寮曡剼鐨勫弻鍒楃洿鎻掑紡鍣ㄤ欢銆?6銆戯紝寮曡剼鍒嗛厤濡傚浘13-4鎵€绀恒€傚悇寮曡剼鐨勫惈涔夎В閲婂涓嬶細鈥⑩€⑩€⑩€ref鍙傝€冪數鍘嬭緭鍏ョ锛岋紞10锝?10V銆傗€⑩€⑩€⑩€CC宸ヤ綔鐢靛帇杈撳叆绔紝+5锝?15V銆傗€⑩€⑩€⑩€I7锝濪I0鏁板瓧淇″彿杈撳叆锛屽叾涓璂I0涓烘渶浣庝綅锛孌I7涓烘渶楂樹綅銆傗€⑩€⑩€⑩€OUT1妯℃嫙鐢垫祦杈撳嚭绔?锛屽綋杈撳叆鏁板瓧涓哄叏1鏃讹紝杈撳嚭鐢垫祦鏈€澶э紱鍏?鏃讹紝杈撳嚭鐢垫祦涓?銆備负浜嗚緭鍑烘ā鎷熺數鍘嬶紝杈撳嚭绔』鍔營/V锛堢數娴?鐢靛帇锛夎浆鎹㈢數璺€傗€⑩€⑩€⑩€OUT妯℃嫙鐢垫祦杈撳嚭绔?锛岃瀹欼OUT+IOUT=甯告暟銆?4鈥⑩€⑩€⑩€OUT2妯℃嫙鐢垫祦杈撳嚭绔?锛岃瀹欼OUT1+IOUT2=甯告暟銆傗€⑩€⑩€⑩€fb鐗囧唴鍙嶉鐢甸樆寮曡剼,涓庤繍鏀鹃厤鍚堟瀯鎴怚/V杞崲鐢佃矾銆傗€⑩€⑩€⑩€LE杈撳叆閿佸瓨浣胯兘淇″彿杈撳叆绔紝楂樼數骞虫湁鏁堛€傗€⑩€⑩€⑩€nnnCS鐗囬€変俊鍙风锛屼綆鐢靛钩鏈夋晥銆傗€⑩€⑩€⑩€nnnWR1鍐欎俊鍙?绔紝浣庣數骞虫湁鏁堛€傗€⑩€⑩€⑩€nnnWR2鍐欎俊鍙?绔紝浣庣數骞虫湁鏁堛€傗€⑩€⑩€⑩€nnnXfer浼犺緭鎺у埗淇″彿杈撳叆绔紝浣庣數骞虫湁鏁堛€?褰揑LE涓洪珮鐢靛钩锛宯nnnCS鍜宯nnnWR1鍚屾椂涓轰綆鐢靛钩鏃讹紝8浣嶆暟瀛楅噺鍙互閫氳繃DI0锝濪I7寮曡剼杈撳叆瀵勫瓨鍣紱褰搉nnnCS鎴杗nnnWR1鐢变綆鍙橀珮鏃讹紝鏁版嵁琚攣瀛樺湪杈撳叆瀵勫瓨鍣ㄧ殑杈撳嚭绔€傚浜嶥AC瀵勫瓨鍣ㄦ潵璁?褰搉nnnXfer鍜宯nnnWR2鍚屾椂涓轰綆鐢靛钩鏃讹紝DAC瀵勫瓨鍣ㄤ腑鐨勬暟鎹笌杈撳叆瀵勫瓨鍣ㄧ殑杈撳嚭鏁版嵁涓€鑷达紱褰搉nnnXfer鎴杗nnnWR2鐢变綆鍙橀珮鏃讹紝杈撳叆瀵勫瓨鍣ㄧ殑鏁版嵁琚攣瀛樺湪DAC瀵勫瓨鍣ㄧ殑杈撳嚭绔紝鍗?5鐢变綆鍙橀珮鏃讹紝杈撳叆瀵勫瓨鍣ㄧ殑鏁版嵁琚攣瀛樺湪DAC瀵勫瓨鍣ㄧ殑杈撳嚭绔紝鍗冲彲鍔犲埌D/A杞崲鍣ㄥ幓杩涜杞崲銆傚浘13-4杩樼粰鍑轰簡DAC0832鍐呴儴缁撴瀯鍔熻兘鍥撅紝鍦―AC0832鍐呴儴鏈?涓?浣嶇殑杈撳叆瀵勫瓨鍣ㄥ拰1涓?浣嶇殑DAC瀵勫瓨鍣紝鏍规嵁鍓嶉潰缁欏嚭鐨勫垎鏋愶紝瀹冧滑鍙互鍒嗗埆琚€夐€氥€傝繖鏍凤紝CPU閫佹潵鐨勬暟鎹厛杩涘叆杈撳叆瀵勫瓨鍣紙鐢眓nnnCS鎺у埗锛夛紝鍦ㄩ渶瑕佽繘琛孌/A杞崲鏃讹紝鍐嶉€夐€欴AC瀵勫瓨鍣紙鐢眓Xfer鎺у埗锛夛紝瀹炵幇D/A杞崲锛岃繖绉嶆柟寮忕О涓哄弻缂撳啿鏂瑰紡銆?16鍥惧浘鍥惧浘13131313----5DAC08325DAC08325DAC08325DAC0832鐨勭殑鐨勭殑鍙岀紦鍐叉帶鍒舵柟寮忓弻缂撳啿鎺у埗鏂瑰紡鍙岀紦鍐叉帶鍒舵柟寮忓弻缂撳啿鎺у埗鏂瑰紡n濡傚浘13-5涓篋AC0832鐨勫弻缂撳啿鎺у埗鏂瑰紡鏋勬垚绀烘剰鍥撅紝鍦板潃璇戠爜鍙互鐢?4HC138鏉ュ疄鐜帮紝褰揅S0832A鍜孋S0832B鐗囬€変俊鍙疯鍒嗗埆缁欏嚭锛屽嵆鍙疄鐜板弻缂撳啿鎺у埗鏂瑰紡銆侱AC0832涔熷彲浠ュ伐浣滃湪鍗曠紦鍐叉柟寮忥紝杩欑鏂瑰紡涓嬪彲灏嗚緭鍏ュ瘎瀛?7DAC0832涔熷彲浠ュ伐浣滃湪鍗曠紦鍐叉柟寮忥紝杩欑鏂瑰紡涓嬪彲灏嗚緭鍏ュ瘎瀛樺櫒璁句负鐩撮€氱姸鎬侊紝閫夐€欴AC瀵勫瓨鍣紱涔熷彲灏咲AC瀵勫瓨鍣ㄨ涓虹洿閫氱姸鎬侊紝閫夐€氳緭鍏ュ瘎瀛樺櫒銆傚浘13-6缁欏嚭浜嗚緭鍏ュ瘎瀛樺櫒宸ヤ綔浜庡彈鎺х姸鎬侊紝DAC瀵勫瓨鍣ㄥ伐浣滀簬鐩撮€氱姸鎬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