【方案秀】电机转速测量仪

pythonworld · 2016-05-12T11:14:38+00:00

本帖最后由 pythonworld 于 2016-5-12 19:13 编辑 8 ^" u5 R% { f8 Y 0 s" _ l: ~0 {! F: F. P/ J 电机测速仪组成：ST188红外传感器+555施密特触发器+STM32开发板+LCD1602液晶显示屏# L3 `. z6 O, W: w B' x B a 基本原理就是用定时器捕获功能测量测速脉冲的周期，然后转化为频率和转速。 2 A7 H3 J- Y( y主程序： , \7 o! ^+ C3 { H) I+ a int main(void): ]/ T. {. n$ ]3 q& @! I {7 M: C; V9 {% r) I: o1 N6 z. N " L- y4 z6 \. T0 x6 r /* USER CODE BEGIN 1 */! m) ~" t) @$ ]5 Z @9 L" _: K8 l8 i: R /* USER CODE END 1 */ ( l* K4 X/ E3 y( [: O- b" h2 V5 c6 Y! E& p {9 A /* MCU Configuration----------------------------------------------------------*/ 6 Z% v9 t! s/ i1 A; W5 r! X3 }8 X# ?6 V- w# T9 x/ x: X9 n; _ /* Reset of all peripherals, Initializes the Flash interface and the Systick. *// `. X* m3 G, o. Y" U( i HAL_Init();, [9 I2 d' m/ F: p ) B8 ]( H- V# t4 A( u /* Configure the system clock */ 1 d2 ]& p+ V/ J) h! U- [5 Y SystemClock_Config(); % Z1 ^0 ], x P7 B3 U6 J( P2 N. n" |! E5 A2 q7 y+ n% q: D8 @; z& i /* Initialize all configured peripherals */* d4 ?" {+ R; `; O MX_GPIO_Init();/ _8 p9 g J( e MX_USART2_UART_Init(); " ]; g+ N9 Y" `" M, I* K5 G+ P$ ^' L MX_TIM2_Init();8 q2 K* { |- `/ {/ ^- o7 a 5 D1 y9 H. X4 \* e7 ~; y2 H6 \6 m /* USER CODE BEGIN 2 */" D- r4 X5 j4 K% n q 9 F5 C r$ k4 p7 a! g3 d. A LCDCOM(0x38); + l: i _/ }( L6 q. O2 h0 Y LCDCOM(0x0c);! H( U K& R3 d3 V LCDCOM(0x06);0 @; h3 P4 M% B { LCDCOM(0x01); & R; V$ k6 b' c( v6 v , E1 }& D0 X0 X HAL_TIM_Base_Start_IT(&htim2); 9 d+ d9 A; c4 ^0 ~ HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1); & X* s) K3 F8 v- J __HAL_TIM_ENABLE_IT(&htim2, TIM_IT_TRIGGER); % _ t/ b; G# ^( f; Q, D/ H d9 P2 }9 I1 j; A2 u if(HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1) != HAL_OK) 2 K. j9 l% R& X1 Y+ ]* g+ K3 E { ! j9 G! |& k& V0 z! _ /* Starting Error */ 2 T1 }- q, r7 J3 | Error_Handler();& Q4 r4 W3 h4 [ } 4 e, x. J; o8 h6 u* \) @5 D. r/ b: S l z X+ w. o5 S 4 O. t2 u; }; f( M- K6 Q & t+ O, c8 U- p# g& M: v, v /* USER CODE END 2 */' o( l1 J8 G7 x* f4 q) U * x$ N2 B3 ?& b' x" p /* Infinite loop */ ! \% F$ n& F* W% X9 E( `3 K /* USER CODE BEGIN WHILE */ , x1 j+ t7 ]/ k0 n& }; k while (1) % j) i0 R+ N2 W2 P3 k, j {# l5 ]' b0 h9 @2 ` /* USER CODE END WHILE */5 g7 D- H. k8 f - N# ]; [, w5 Y' V2 ?+ I /* USER CODE BEGIN 3 */ 3 P M) A% T2 ]% q) m HAL_Delay(1200); ' a7 a% E" p$ l LCDCOM(0x01);; u- z$ H1 R8 ?5 n. T HAL_Delay(10); 7 ^. g2 s& `) V! V LCDCOM(0x80); 3 g% e0 ?; Z$ B5 t$ o; S ; t- r5 D" S4 C if(status). z5 h6 V" ?- w3 ?4 w% K {# i3 G8 h- x! v ^ status = 0; 9 Z$ R( v5 t$ Y7 i printf(" %6.0f RPM\n",8000000.0/uwIC2Value2*60);7 x, P j) r' Y( e LCDCOM(0xc0);" P. s, o# ^7 Y" _# A8 R- E3 n printf(" RUN \n"); / L3 f0 a+ ?5 ~3 B) x, g; h/ h6 g. X' x# _' W: V. n if(uwIC2Value2<2)+ @3 _( p% ?5 j N { 6 q2 \- G+ W" h E4 z' G LCDCOM(0xc0);* D7 h: \" X- r printf(" HIGH \n");2 y6 }/ m P/ |/ d8 k } Y2 i+ h# ^- ^1 J& j! |- g! ? } 8 O( H0 w O4 r9 G2 g else- d5 F# |5 t" ]8 _; h { 5 G9 v" ?- Y7 S, b LCDCOM(0x80); * Q: w. ]* n4 L! n printf(" 0 RPM \n"); 1 p5 u: h: K# q0 {* p" w* G LCDCOM(0xc0);5 E" M) A; l E4 e7 W0 A printf(" STOP \n");0 G; l3 y* z+ o. R } : @$ ^0 R/ v# o% q* v4 _ s& h% O' L // LCDCOM(0x18);( P/ E6 ]9 S" o9 v 1 E) ?/ k+ P0 t! J* _ }, V$ J$ [- u4 k$ q: B( j+ n& d /* USER CODE END 3 */( s1 W- |! @% i; z9 o6 k4 @ ' s' a4 u7 e% Z7 H1 @ } ) A2 V0 `( @" ?; O. V `1 F0 T; F1 \2 ? 定时器触发捕获回调函数：$ r" X4 y/ d! j& j2 e+ V void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim) . j6 Z5 H( l' J2 ^! W' _{8 u$ }( C- Q+ o7 {( V) i // HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);) y* y) {. i6 f4 M uwIC2Value2= HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1); . ], o8 {0 ]* ^7 N0 }1 e, {4 t status = 1; 3 s; i$ H& r0 K7 @. P" ~) B: P ( d4 S1 Z* V- I' U} 9 |) x6 @; a& A5 v1 S7 d, R) e 6 U8 I# Y" R0 E* ?& h, t7 H9 h8 Z0 }- }" L6 H# ^. \ ~' _7 Q5 U

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pythonworld 发布时间：2016-5-12 19:14

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本帖最后由 pythonworld 于 2016-5-12 19:13 编辑

   电机测速仪组成：ST188红外传感器+555施密特触发器+STM32开发板+LCD1602液晶显示屏
基本原理就是用定时器捕获功能测量测速脉冲的周期，然后转化为频率和转速。
主程序：
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART2_UART_Init();
  MX_TIM2_Init();

  /* USER CODE BEGIN 2 */

  LCDCOM(0x38);
  LCDCOM(0x0c);
  LCDCOM(0x06);
  LCDCOM(0x01);

  HAL_TIM_Base_Start_IT(&htim2);
  HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1);
__HAL_TIM_ENABLE_IT(&htim2, TIM_IT_TRIGGER);

  if(HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1) != HAL_OK)
  {
/* Starting Error */
Error_Handler();
  }

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */
   HAL_Delay(1200);
   LCDCOM(0x01);
   HAL_Delay(10);
   LCDCOM(0x80);

   if(status)
   {
   status = 0;
      printf("  %6.0f RPM\n",8000000.0/uwIC2Value2*60);
      LCDCOM(0xc0);
      printf("    RUN    \n");

      if(uwIC2Value2<2)
         {
         LCDCOM(0xc0);
         printf("    HIGH    \n");
         }
   }
   else
      {
      LCDCOM(0x80);
      printf("    0 RPM \n");
      LCDCOM(0xc0);
      printf("    STOP    \n");
      }

//    LCDCOM(0x18);

  }
  /* USER CODE END 3 */

}

定时器触发捕获回调函数：
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
//  HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
  uwIC2Value2= HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
  status = 1;

}