馃攳 涓轰粈涔堜綘鐨勫祵鍏ュ紡椤圭洰鎬绘槸鍗￠】锛熷彲鑳芥槸寤舵椂鍑芥暟娌″仛濂斤紒

鎼炶繃宓屽叆寮忓紑鍙戠殑鑰侀搧浠簲璇ラ兘閬囧埌杩囪繖绉嶆儏鍐碉細LED鐏棯鐑佸拷蹇拷鎱€佷覆鍙ｉ€氫俊鏁版嵁涓㈠け銆佹寜閿弽搴旀參鍗婃媿...馃く 杩欎簺鍧戠埞闂锛?0%閮藉拰鈥?strong>鈥嬪欢鏃跺嚱鏁扮簿搴︿笉澶熲€?/strong>鈥嬫湁鍏筹紒浠婂ぉ鍜变滑灏辨幇寮€浜嗘弶纰庝簡璁茶锛屾€庝箞鐢ㄧ‖浠跺畾鏃跺櫒鎼炲嚭鈥?strong>鈥嬪井绉掔骇绮惧噯寤舵椂鈥?/strong>鈥嬶紝璁╀綘鐨勪唬鐮佽窇寰楀儚寰疯姍涓€鏍蜂笣婊憕

馃殌 涓€銆佺‖浠跺畾鏃跺櫒 vs 杞欢寤舵椂锛氱敓姝荤湅娣★紝涓嶆湇灏卞共锛?/h2>

锛堟帍鍑哄姣旇〃鏍煎厛闀囧満瀛愶級

鈥?strong>鈥嬪姣旈」鈥?/strong>鈥?/th>	鈥?strong>鈥嬭蒋浠跺欢鏃垛€?/strong>鈥?/th>	鈥?strong>鈥嬬‖浠跺畾鏃跺櫒鈥?/strong>鈥?/th>
鈥?strong>鈥嬬簿搴︹€?/strong>鈥?/td>	璇樊卤10%璧锋锛堢巹瀛﹁皟鍙傦級	璇樊<0.1%锛堟椂閽熶笉宕╁氨绋筹級
鈥?strong>鈥婥PU鍗犵敤鈥?/strong>鈥?/td>	100%鍗犵潃鑼呭潙涓嶆媺灞?/td>	0%锛堝悗鍙拌嚜鍔ㄨ繍琛岋級
鈥?strong>鈥嬮€傜敤鍦烘櫙鈥?/strong>鈥?/td>	涓存椂娴嬭瘯銆佷笉閲嶈鐨勯棯鐏?/td>	閫氫俊鍗忚銆佺數鏈烘帶鍒剁瓑
鈥?strong>鈥嬭皟璇曢毦搴︹€?/strong>鈥?/td>	鏀逛釜寰幆娆℃暟灏卞緱閲嶆柊缂栬瘧	閰嶇疆涓€娆＄粓韬彈鐩?/td>

馃憠 鈥?strong>鈥嬩妇涓牀瀛愨€?/strong>鈥嬶細缃戦〉3鎻愬埌STM32鐢ㄧ┖寰幆鍋?绉掑欢鏃讹紝7200娆″惊鐜殑缁忛獙鍊兼崲涓姱鐗囧氨寰楅噸璋冿紝鑰岀‖浠跺畾鏃跺櫒鍙鏀逛釜棰勫垎棰戠郴鏁板氨鑳介€氬悆鎵€鏈変富棰戯紙鍙傝€冪綉椤?鐨凾IM6閰嶇疆妗堜緥锛夈€?/p>

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馃敡 浜屻€佹墜鎶婃墜瀹炴垬锛氫笁琛屼唬鐮佹悶瀹氬井绉掔骇寤舵椂

1. 瀹氭椂鍣ㄥ垵濮嬪寲锛堜互STM32涓轰緥锛?/h3>

c澶嶅埗
void TIM_Config(void){
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); // 寮€鏃堕挓
    TIM_TimeBaseInitTypeDef TIM_InitStruct;
    TIM_InitStruct.TIM_Prescaler = 72-1;      // 72MHz涓婚涓嬪垎棰?us
    TIM_InitStruct.TIM_Period = 0xFFFF;       // 鏈€澶ц鏁板懆鏈?/span>
    TIM_TimeBaseInit(TIM2, &TIM_InitStruct);  // 搴旂敤閰嶇疆
}

鈥?strong>鈥嬪叧閿偣鈥?/strong>鈥嬶細棰勫垎棰戠郴鏁拌绠楀叕寮?涓婚/(鐩爣棰戠巼)-1銆傛瘮濡傝1us寤舵椂锛?2MHz涓婚涓嬪氨鏄?2-1锛堝弬鑰冪綉椤?鐨勫叕寮忔帹瀵硷級銆?/p>

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2. 寤舵椂鍑芥暟灏佽

c澶嶅埗
void delay_us(uint16_t us){
    TIM_SetCounter(TIM2, 0);    // 璁℃暟鍣ㄥ綊闆?/span>
    TIM_Cmd(TIM2, ENABLE);      // 鍚姩瀹氭椂鍣?/span>
    while(TIM_GetCounter(TIM2) < us); // 鍗′綇绛夋椂闂村埌
    TIM_Cmd(TIM2, DISABLE);     // 鍏抽棴瀹氭椂鍣?/span>
}

鈥?strong>鈥嬮伩鍧戞寚鍗椻€?/strong>鈥嬶細涓€瀹氳鍏堝叧瀹氭椂鍣ㄥ啀鏀归厤缃紒涓嶇劧灏卞儚缃戦〉6璇寸殑锛屽彲鑳戒細鍑虹幇璁℃暟鍣ㄦ紓绉伙紙瀹炴祴琛€娉暀璁煒級銆?/p>

馃挕 涓夈€佺簿搴︿紭鍖栦笁澶х粷鎷?/h2>

馃幆 缁濇嫑1锛氭椂閽熸簮鏍″噯

缃戦〉4鎻愬埌51鍗曠墖鏈虹敤澶栭儴鏅舵尟璇樊鑳介檷鍒?.01%锛岃€屽唴閮≧C鎸崱鍣ㄨ宸珮杈韭?%锛佸缓璁細

• 浼樺厛閫夋嫨澶栭儴鏅舵尟
• 瀹氭湡鐢ㄧず娉㈠櫒鏍″噯锛堝弬鑰冪綉椤?鐨勬牎鍑嗘妧鏈級

鈿?缁濇嫑2锛氫腑鏂骇鑱旀妧鏈?/h3>

鍍忕綉椤?璇寸殑锛屽彲浠ユ悶涓富浠庡畾鏃跺櫒锛?/p>

• 涓诲畾鏃跺櫒璐熻矗绮楃矑搴﹁鏃讹紙姣斿1ms锛?/li>
• 浠庡畾鏃跺櫒鍋氬井绉掔骇琛ュ伩
  杩欐牱鏃㈣兘寤堕暱鏈€澶у欢鏃舵椂闂达紝鍙堣兘淇濇寔绮惧害锛堝疄娴嬭宸?lt;50ns锛侊級

馃攱 缁濇嫑3锛氫綆鍔熻€楁ā寮忔惌閰?/h3>

鍙傝€冪綉椤?0鐨凪SP430妗堜緥锛屽湪绛夊緟寤舵椂鏈熼棿璁〤PU杩涘叆浼戠湢锛?/p>

c澶嶅埗
while(绛夊緟鏍囧織浣?{
    __WFI(); // 杩涘叆浣庡姛鑰楁ā寮?/span>
}

杩欐牱涓嶄粎鐪佺數锛岃繕鑳介伩鍏嶅儚缃戦〉9璇寸殑"蹇欑瓑寰?瀵艰嚧绯荤粺鍗￠】銆?/p>

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馃洜锔?鍥涖€佸疄鎴樻渚嬶細鐢ㄧ簿鍑嗗欢鏃舵嫰鏁戜綘鐨凩ED鍛煎惛鐏?/h2>

锛堢洿鎺ヤ笂缃戦〉2鐨勪唬鐮侀瓟鏀圭増锛?/p>

c澶嶅埗
// 閰嶇疆PWM瀹氭椂鍣?/span>
TIM_OCInitTypeDef PWM_Config;
PWM_Config.TIM_OCMode = TIM_OCMode_PWM1;
PWM_Config.TIM_Pulse = 0; // 鍒濆鍗犵┖姣?%
TIM_OC1Init(TIM3, &PWM_Config);

// 娓愬彉寰幆
for(int i=0; i<100; i++){
    TIM_SetCompare1(TIM3, i); 
    delay_us(50); // 绮惧噯鎺у埗娓愬彉閫熷害
    if(i==99) i=0; // 寰幆鎾斁
}

鐢ㄨ繖涓柟妗堝仛鍑虹殑鍛煎惛鐏紝姣旀櫘閫氬欢鏃舵柟妗堝钩婊?0鍊嶄笉姝紒缃戦〉5瀹炴祴STM32F4鐨勭簿搴﹁兘杈惧埌卤0.01us锛岀敤鏉ュ仛婵€鍏夐浄杈炬椂搴忔帶鍒堕兘缁扮话鏈変綑銆?/p>

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馃専 鐙瑙佽В锛?025骞村祵鍏ュ紡寤舵椂鎶€鏈秼鍔?/h2>

浠庣綉椤?鍜岀綉椤?1鐨勬渶鏂版柟妗堟潵鐪嬶紝鏈潵鏈変袱涓彂灞曟柟鍚戯細

1. 鈥?strong>鈥婣I棰勬祴寮忓欢鏃垛€?/strong>鈥嬶細閫氳繃鏈哄櫒瀛︿範棰勫垽浠诲姟鑰楁椂锛屽姩鎬佽皟鏁村畾鏃跺櫒鍙傛暟锛堟煇澶у巶瀹為獙瀹ゅ凡瀹炵幇璇樊<1ns锛?/li>
2. 鈥?strong>鈥嬮噺瀛愭椂閽熷悓姝モ€?/strong>鈥嬶細鍒╃敤鍘熷瓙閽熸妧鏈疄鐜拌法璁惧绾崇绾у悓姝ワ紙鍙傝€僋ASA鐏槦杞﹂€氫俊鏂规锛?/li>

涓嶈繃璇村疄鍦ㄧ殑锛屽鍜卞伐绋嬪笀鏉ヨ锛屸€?strong>鈥嬫帉鎻″ソ鐜版湁纭欢瀹氭椂鍣ㄦ妧鏈?鐏垫椿杩愮敤浼樺寲鏂规鈥?/strong>鈥嬶紝宸茬粡鑳芥悶瀹?9%鐨勯」鐩渶姹備簡锛佹瘯绔熲€斺€?/p>

"鏈€濂界殑浠ｇ爜涓嶆槸鏈€鐐妧鐨勶紝鑰屾槸鏈€绋冲畾鐨? 鈥斺€?鏌愬崄骞村祵鍏ュ紡鑰侀笩鐨勭粓鏋佹劅鎮?/p>

锛堝畬锛?/p>