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Ҳ֪ʱ˹ȥðռҵĻҲͽ͵ģúõİ·ȷʵɹ·4·ַҲץʲô·Ǻ·ĶҲ̽ռҸ
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һǵadc֮·ûҪֶΣϾa DCռҪλõģһadcԺǴȫƵġ
ʱֻܰѴҰɵ·ҰôadcĶأȻ˵ɱһĿԣ̽ռʵ̫ˣѡһ֣˵ɯ֮ģһλᡣ
ټҰǸֵģҪĻҪЩСƽС˷֮̽ռ߾ܲȻ˵Ļͦ죬ÿζĥߵطһЩѪһڿ϶ѷġ
Զʱķdzܣ·صıȽϺãͷDZַߵĴҰҲûʲô취ϾܲܶŹͷȥɣȻ˵ͷķôҲܲסһֱqܴ㣬Ҳͦ۵ġ
·ĴҰԺһˣַ33ǷdzƵģܿͰ·Ķĥ·涼Ѿﵽ˶ĸߵأٲƵĴʩĻܿ·ߵ϶һҪĥġ
Ϊ֮£һûа취Ǿַһ˵ľöˣҲ˵ǾĥĻҲ൱56ԲǵԱô䣬վһ·ǻȱڵġ
ʱõǿȶ̵ģΪַȻ˵һľƣַƷdzƻûеôŵĵزһõԺǾл̵ᷭġ
ҲֻǷ̵һѡʵжDz̫ʵģΪ·ѾǵĸߵأǸôȥأΨһĿַܾȥdzпܵġ
ַռôƣôȥðմأΪҲûоԵİգ˵öһԺַǾͻᱻַ̣ǿ϶ġ
ԼͿȵģѶĸߵطĥԼĻͻԷ̵Ļᣬ˭Ӧöġ
ϾͳҲζûҲζǿ̵ϣַǾְ취öԷԽԽǿ̵ϣƽʱλ棬ƶͶˡ
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ַʱҲԼҵĶѣʼ·ĸߵȻ˵ַھ÷dzãӢۻͦģַҲǰֻԼҵĸеȥĥһ¶Ѫ˵Ĺͦ͵ġ
ַǵҪĿ겢··ֻҪ̽ռDZһֱԵһ˵ĻܿͿ·Ϊ̽ռҵwǿԱڷϵıϣ֮ԼͨٴͿɶ˺
ټϱadcͷdzĿ죬Ϊdzװ϶һЩٺ֮ģ̽ռұǻ֮ģ֮ʹü֮һͨɶ˺װڲ˵ҲǷdzбҪġ
Ժܿ·Ѫͱĥʣ1/3濴֮Ҳòȥ·طַ»һȥ·Ļַһ߾Ϳ·ĴҰͬ·̽ռȫй
ʱʱ֮ڣַ5˵ģ5˼ƶ·ǿ϶סģȵ·˺·Ĺͷ֮ٹѾˣΪڵķ֮·ֻ˵ģǾƵġ
ȵҰ̽ռҵַ֮ҲԼҵĶѿʼָӣѸٳŶ·ķ˹ƺҲ˲Ծ·Ĺͷ·˸Ͻ·ϣκַٶʵ̫ˡ
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ΪһץĻǺпǻ̵ᷭģȻ˵ַоƣֻҪûؼҳװǾͺͶûʲô𣬶ؼңװԺڿֱʵѾַDzˣʱؼҲװҪġ
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ϾЩְҵѡȫѵٵģ˵˭ĻܿͿһ˸һˣٸߣǶ¾ĻҲûʲôãҪǰԼܹվס
Ȼַһ߿֮ӵ5ʱ䣬ֻ5ַ˵ԶԶģս֮ͿԷֹı˺ַĻս־ͻᴥһܡ
ټԼľñͱȶߣ൱ƾյıȶһս֣һ˭أսַ֮Уһŭߵ˭߶Ǽ顣
һγ֮ҲھʼˣΪ·ķѾƵˣԶ϶Ҫ·رߵģҲζŶĻҲȫ4˻˵Ļǿ
֮ʱѡDzκεĻᣬ֮ͿԿٵԼĽࡣ
ڴbuffҴڵʱܿͿѶķȫ㲻ܰѶˮַһҲֱӰѶ·ĸߵҲȫ
˵ֻҪbuff͵ڵ춨һʤûвǵˮ·ߵطȫ֮ҲζһҲһַǵġ
ַӵʱûҰΪȫûлҰһֱڸߵæſ϶˳۾ҲԷĵĴ
濴ַdzٳûгϣҲµַӦڴ
ڶڶ˵ѡҪôĿַǰѴǽĻǻϾûʲô̵ĻˣҲʲôϣ
һѡȫѹȥ֮ǰҪ·ıȴȥȻһЩҪǼҵˡ
ʣۻ˭ѡ2ְ취Ȼ˵ռߣ벻ţѹĻⳡĽѾˣƴһµĻܹ˵̡ܷ
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˹ַ֮ǰѴѾ˰ѪַʱҲˣǽдҰͬʱԼѿʼ˷
ַһ߶ǰ棬һEתǼǰŵߣȻͿʼǰţȻ˵˵ܹȴλǶͷλôôĸ
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ΪַwȻ˵ܸǰĵ˼ٺͼǼٵǰǶԷԼԶĺܵĻַw첻ɼٵġ
ڶѻû֧ԮԶ濴ַ֮ҲǺԥתͷܣʱַүץųԼWܣŵ˼٣ͬʱַҲ˹ȥ
ڼЧǷdzãûмַȥʼŶadcһַŭģֱӳͰѶˡ
ʱҲ֧Ԯ˹
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Ҳ֪ʱ˹ȥðռҵĻҲͽ͵ģúõİ·ȷʵɹ·4·ַҲץʲô·Ǻ·ĶҲ̽ռҸ
ʱֻʣ·жˣ··ŸߵرķգһҪ˻ȥˣʱ˭ȥһ磬ADCȥȷʵܹԸһ£̽ռܹٵߡ
һǵadc֮·ûҪֶΣϾa DCռҪλõģһadcԺǴȫƵġ
ʱֻܰѴҰɵ·ҰôadcĶأȻ˵ɱһĿԣ̽ռʵ̫ˣѡһ֣˵ɯ֮ģһλᡣ
ټҰǸֵģҪĻҪЩСƽС˷֮̽ռ߾ܲȻ˵Ļͦ죬ÿζĥߵطһЩѪһڿ϶ѷġ
Զʱķdzܣ·صıȽϺãͷDZַߵĴҰҲûʲô취ϾܲܶŹͷȥɣȻ˵ͷķôҲܲסһֱqܴ㣬Ҳͦ۵ġ
·ĴҰԺһˣַ33ǷdzƵģܿͰ·Ķĥ·涼Ѿﵽ˶ĸߵأٲƵĴʩĻܿ·ߵ϶һҪĥġ
Ϊ֮£һûа취Ǿַһ˵ľöˣҲ˵ǾĥĻҲ൱56ԲǵԱô䣬վһ·ǻȱڵġ
ʱõǿȶ̵ģΪַȻ˵һľƣַƷdzƻûеôŵĵزһõԺǾл̵ᷭġ
ҲֻǷ̵һѡʵжDz̫ʵģΪ·ѾǵĸߵأǸôȥأΨһĿַܾȥdzпܵġ
ַռôƣôȥðմأΪҲûоԵİգ˵öһԺַǾͻᱻַ̣ǿ϶ġ
ԼͿȵģѶĸߵطĥԼĻͻԷ̵Ļᣬ˭Ӧöġ
ϾͳҲζûҲζǿ̵ϣַǾְ취öԷԽԽǿ̵ϣƽʱλ棬ƶͶˡ
Ͼְҵıոտʼ˭ָòͷĵ1˭Զ滹ڿš
ַʱҲԼҵĶѣʼ·ĸߵȻ˵ַھ÷dzãӢۻͦģַҲǰֻԼҵĸеȥĥһ¶Ѫ˵Ĺͦ͵ġ
ַǵҪĿ겢··ֻҪ̽ռDZһֱԵһ˵ĻܿͿ·Ϊ̽ռҵwǿԱڷϵıϣ֮ԼͨٴͿɶ˺
ټϱadcͷdzĿ죬Ϊdzװ϶һЩٺ֮ģ̽ռұǻ֮ģ֮ʹü֮һͨɶ˺װڲ˵ҲǷdzбҪġ
Ժܿ·Ѫͱĥʣ1/3濴֮Ҳòȥ·طַ»һȥ·Ļַһ߾Ϳ·ĴҰͬ·̽ռȫй
ʱʱ֮ڣַ5˵ģ5˼ƶ·ǿ϶סģȵ·˺·Ĺͷ֮ٹѾˣΪڵķ֮·ֻ˵ģǾƵġ
ȵҰ̽ռҵַ֮ҲԼҵĶѿʼָӣѸٳŶ·ķ˹ƺҲ˲Ծ·Ĺͷ·˸Ͻ·ϣκַٶʵ̫ˡ
ڶ·ֻʣˣԾʱַ嵽ǰȥҲ첻ʲôвַһߺܿԼҵ̽ռҰڶ·ĸߵطҲѾûˡ
ôãһֱûлؼҳװÿ϶˲ٵĽңǶұȽϽԶľͿһ˻ȥijװַһߣֶװѾϴIJˣԸϽԼҶѻؼҲװ
ΪһץĻǺпǻ̵ᷭģȻ˵ַоƣֻҪûؼҳװǾͺͶûʲô𣬶ؼңװԺڿֱʵѾַDzˣʱؼҲװҪġ
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ϾЩְҵѡȫѵٵģ˵˭ĻܿͿһ˸һˣٸߣǶ¾ĻҲûʲôãҪǰԼܹվס
Ȼַһ߿֮ӵ5ʱ䣬ֻ5ַ˵ԶԶģս֮ͿԷֹı˺ַĻս־ͻᴥһܡ
ټԼľñͱȶߣ൱ƾյıȶһս֣һ˭أսַ֮Уһŭߵ˭߶Ǽ顣
һγ֮ҲھʼˣΪ·ķѾƵˣԶ϶Ҫ·رߵģҲζŶĻҲȫ4˻˵Ļǿ
֮ʱѡDzκεĻᣬ֮ͿԿٵԼĽࡣ
ڴbuffҴڵʱܿͿѶķȫ㲻ܰѶˮַһҲֱӰѶ·ĸߵҲȫ
˵ֻҪbuff͵ڵ춨һʤûвǵˮ·ߵطȫ֮ҲζһҲһַǵġ
ַӵʱûҰΪȫûлҰһֱڸߵæſ϶˳۾ҲԷĵĴ
濴ַdzٳûгϣҲµַӦڴ
ڶڶ˵ѡҪôĿַǰѴǽĻǻϾûʲô̵ĻˣҲʲôϣ
һѡȫѹȥ֮ǰҪ·ıȴȥȻһЩҪǼҵˡ
ʣۻ˭ѡ2ְ취Ȼ˵ռߣ벻ţѹĻⳡĽѾˣƴһµĻܹ˵̡ܷ
ֻ1%ĿܣҲܿһ˿ϣҲô
ʱѸٰ·ı֮ʼ߹ȹ̽ģΪ5˶·ߵĻһ¹ַѾѴˣǾͳˡ
˹ַ֮ǰѴѾ˰ѪַʱҲˣǽдҰͬʱԼѿʼ˷
ַһ߶ǰ棬һEתǼǰŵߣȻͿʼǰţȻ˵˵ܹȴλǶͷλôôĸ
ַһһǰŵѪһ濿֮ĺܵĻԼͿWܰѶĺŸ
ΪַwȻ˵ܸǰĵ˼ٺͼǼٵǰǶԷԼԶĺܵĻַw첻ɼٵġ
ڶѻû֧ԮԶ濴ַ֮ҲǺԥתͷܣʱַүץųԼWܣŵ˼٣ͬʱַҲ˹ȥ
ڼЧǷdzãûмַȥʼŶadcһַŭģֱӳͰѶˡ
ʱҲ֧Ԯ˹
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