本帖最后由 pythonworld 于 2016-5-12 19:13 编辑 3 U' O2 U/ P- w6 Q: O- f 1 f3 g. h J5 Y; T3 n: q1 s6 r 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) {" c" u1 o/ j! A5 H& Z* Q /* USER CODE BEGIN 1 */: v! q; [0 H5 @7 _ /* USER CODE END 1 */ /* MCU Configuration----------------------------------------------------------*/$ Y( P4 O4 w$ ^4 y /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); * ~% `, a* K" ]8 Z- W /* Configure the system clock */ SystemClock_Config(); 8 Q% S* U# B* H) ]6 L( w+ }, l8 d9 X /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART2_UART_Init(); MX_TIM2_Init();. q; a" @. v, \6 r2 O# O q4 f" ~6 p- q" X /* USER CODE BEGIN 2 */ LCDCOM(0x38); LCDCOM(0x0c);% \4 r# H% j% i7 u' E: N LCDCOM(0x06);2 M7 e2 J5 c0 R7 T LCDCOM(0x01); HAL_TIM_Base_Start_IT(&htim2);3 U O* [, g/ W* z; Q# x5 Y HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1); __HAL_TIM_ENABLE_IT(&htim2, TIM_IT_TRIGGER);9 g# o* g+ c! r* M9 T " o7 \ h$ `4 G1 D/ h if(HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1) != HAL_OK) { /* Starting Error */. t; M0 H1 |; } B& Y0 } Error_Handler(); } + P2 Y7 k% |8 { /* USER CODE END 2 */ /* Infinite loop */9 g* |& L7 T) Z( y /* USER CODE BEGIN WHILE */ while (1)" e# p6 J9 M' Q4 i# Q { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */' X) V& p) j# t, t* a8 |# }" c HAL_Delay(1200);3 a a7 S \5 G { LCDCOM(0x01);: c- _- Y6 Z5 @' j- n z Z) c1 e HAL_Delay(10); LCDCOM(0x80); if(status)$ V" B, {% g% u$ [$ S) ` { status = 0;" \' Z- C0 N8 S2 m, m; V, u' e" g printf(" %6.0f RPM\n",8000000.0/uwIC2Value2*60);; j- t# e- z0 i# a" a; k$ v LCDCOM(0xc0); printf(" RUN \n"); # ?% o! e# S+ z* ?+ o& y if(uwIC2Value2<2) { LCDCOM(0xc0);: x- Y! a7 m0 F( G C printf(" HIGH \n"); } }# t0 X& d9 ]0 ?" m Z4 k, | else { LCDCOM(0x80); printf(" 0 RPM \n"); LCDCOM(0xc0);, Y! G% V" ], L; M2 S( d, \; X printf(" STOP \n");! R. L; i* H( U4 [! @ } // LCDCOM(0x18); } /* USER CODE END 3 */ : @1 p/ o0 s, i9 [) b7 s }6 Q7 W/ u0 l( a3 G7 o2 v) B ^; f 定时器触发捕获回调函数 : void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)1 t0 {! f( G1 P& V0 q) [( F, W3 J { // HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);2 n9 x$ G8 K, Y% O0 j uwIC2Value2= HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);& h* _1 X. b6 E! L& S/ e ^ status = 1; } |
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给电机个图片 |
给电机个图片 |
谢谢楼主分享! |
谢楼主分享 |
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