【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 & t5 Z7 X3 A) _( X 4 q9 L- K* t4 Q4 H2 c1 A* d, u 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 1 D. b+ Q' n& ]* k* F$ Z/ n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。 / d: x8 ^8 N# ^主程序： ; a0 f `' ~8 u3 X5 d5 d& U9 }# |/ Bint main(void)( B1 Z: z$ G- }* W5 A$ V {0 ^& z4 J! j1 M , k; \4 L6 Q7 d; \8 \" k /* USER CODE BEGIN 1 */$ v# x3 F8 f0 T+ R9 T% J ; O+ g) T5 `0 {5 y /* USER CODE END 1 */0 U a) o+ W$ |3 ~, E& Y1 ` , t- C" j+ y4 C4 W$ [" D /* MCU Configuration----------------------------------------------------------*/ # q- _" j s3 k. [( Y- z+ i : K; {0 z% t! K& _1 V* | /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ ) @% l3 r" f+ y. ^# E- ] HAL_Init(); ! L8 w/ k# O: `1 Q6 Y, D7 C7 W+ I8 w3 a5 F' Y /* Configure the system clock */ 1 ^# {2 J6 y) {2 E* l7 l' J SystemClock_Config(); 2 K) C: r, _* ~% p4 E+ e" b# F0 a5 `) f+ i% X, f: H /* Initialize all configured peripherals */ * U' E/ x, l) O9 c1 J) J- K MX_GPIO_Init();0 Z) S$ G% V% C MX_USART2_UART_Init();" {% j$ Z+ s1 j, B2 ^ MX_TIM2_Init(); # N, U: Y9 x/ a : J5 _! P R I6 a /* USER CODE BEGIN 2 */) ?1 V: p9 m) H$ N* L ( f7 e0 a0 \/ Y. o LCDCOM(0x38); 9 V0 e/ S/ K# I) u LCDCOM(0x0c);* w% t) J0 ]2 W9 |0 v# T( y; t LCDCOM(0x06); 7 \: e/ x, w0 b t4 Q* {! F LCDCOM(0x01); |) V8 P5 i0 r/ i+ R ) l$ J3 U. L0 h5 \- J- q) W. @ HAL_TIM_Base_Start_IT(&htim2); 4 B @% h) P" j! x HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1); + A# a# \6 w8 f* R0 f# ^ __HAL_TIM_ENABLE_IT(&htim2, TIM_IT_TRIGGER);0 d" x' N+ \& u2 l i ! g7 m* f8 r# w+ e" U if(HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1) != HAL_OK) 4 u/ x% S4 [% A# z { . |( {* p% i! v! \( ^ /* Starting Error */2 p2 D, f- {/ J7 L& e Error_Handler();/ ?- E# K5 Q5 x9 a% u } : h5 y) J8 }* g( r/ h5 }9 w8 q, y$ p n/ P) ^6 \6 t$ K1 R& b7 e+ H # }2 q: _6 |8 |7 n- X /* USER CODE END 2 */" v. h7 O# Z; W c# O 6 Z" Q# {* a5 t) S /* Infinite loop */ 2 o) C2 V' x4 I. i /* USER CODE BEGIN WHILE */. y+ K/ p3 z6 d5 a+ T8 Q( N4 J while (1)& a4 D2 _4 F: t& u {5 V- h! y0 Q1 V. n2 j5 j9 ~ /* USER CODE END WHILE */. f# ^$ x: M: C1 Z/ M+ l 4 k: L2 _8 R7 X( r /* USER CODE BEGIN 3 */ * I9 y7 i% ]/ p3 x' V: C' {! @* } HAL_Delay(1200); 1 l4 ~6 u) _) s5 @# W& m LCDCOM(0x01);) K( i. C9 E! A2 N: n HAL_Delay(10); 1 g9 v1 g& ?5 i% o! f LCDCOM(0x80);; p/ P; j1 d' R' V% _3 @9 c& U ! a) F5 U' z+ V* N' B( b. e+ w! R if(status) : | f" L. n6 k6 B { ! a/ j, C+ c1 U: Z9 | _ status = 0;- p9 d8 n1 }9 |6 ]6 p9 U. ` printf(" %6.0f RPM\n",8000000.0/uwIC2Value2*60);! u8 Y+ A" K) k) A; k9 M LCDCOM(0xc0); 3 s9 L8 O) |5 @0 v& Y6 N printf(" RUN \n");# W" x# I4 e: f# g ; L* B) i' |* G' x0 c, O- i if(uwIC2Value2<2)2 A/ I5 g. S9 ` { 2 o {" A" H5 g0 u% ^! p LCDCOM(0xc0); ' i" I: k9 v4 j# W printf(" HIGH \n");' l: _* B$ }4 k% C } . q0 ]2 V2 f( I } # i8 `$ T$ j" Y( Z( R, G+ K+ e else% l9 X% S% N: k' m { + {2 n' |/ }* d) k3 U LCDCOM(0x80);3 R/ t, R2 U+ L0 K printf(" 0 RPM \n"); % s z/ r3 a: f3 D6 \ LCDCOM(0xc0); 4 u6 o2 n! W8 l/ m- \ printf(" STOP \n"); 8 k O+ A. L, P }$ ~" K9 m3 T' Z% q; Q5 w 8 \- ]1 ^8 ?+ b+ V) B// LCDCOM(0x18); ( O; M S) m, c; o . }) l4 L; m0 r. [% ^. n; Q$ A }" q9 D- W9 s& ?2 V /* USER CODE END 3 */ 3 N- j, u. P% [1 |# P8 d2 K$ M [$ F1 A; V: s4 B( h } 3 |) U _8 d! S2 Y% p1 _* l 6 x8 o# u% T% f6 g% d定时器触发捕获回调函数：1 Z, S( f( c1 u% x void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim) * E. o" j/ T% ]& m{ . ^4 I3 m& p, M: a1 V) `// HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);( M) s% ?+ K0 H- X uwIC2Value2= HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1); $ j$ d* f: g0 a0 y% Z# G' p* j status = 1; R* H& _4 C/ _ / y+ E( y* e6 g8 f} 5 T2 S: x3 ?5 p9 u+ L; m# b* V6 @0 E8 H7 y( H* E3 \5 x. B 5 }4 r: m5 ~: U- e9 h8 Y 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;

}