stm32超声波测距汇总.pdfVIP

嵌入式系统及应用

开放性实验报告

Stm32

HC-SR04超声波测距

1.1STM32

1.1.1HC-SR04

HC-SR042cm-400cm

3mm

DC5V

2mA

5V0V

15

2cm-450cm

3mm

1.1.2HC-SR04

IOTRIGTRIG10us;

840khz

IOECHO

=(*(340M/S))/2;T={V25-Vsense

/Avg_Slope}+25

V25=Vsense251.43

Avg_Slope=Vsensemv/uv/

4.3Mv/

:=*(340M/S))/2

1.2

ARM

1.3

1.3.1

ECHO

1.3.2

:

:

1.3.3

K5

SV++

K6

SV--

K7

K7

K4

K1

2.1

2.1.1

2.1.2

STM-32HC-SR04

2.1.3

1HC-SR04stm-32LED

2

2.2

2.2.1

1PC8TrigPC7

EchoAPB2GPIOC

2:PA15PB4~7APB2GPIOA

GPIOB

3PB8APB2GPIOB

PB8

4:PE0~13pAPB2GPIOE

5:

2.3

2.3.1IO