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Demo File: stm32f4_hcsr04_ultrasonic_sensor_demo.mdl

Description

The demo showing how to use PWM capture to capture the pulse echo from Ultrasonic sensor. Convert the captured value +Width to unit of micro-seconds, then divide by 58 to get distant in unit of centimeters (Cm). The output result show on LCD and also send out via UART.

Hardware setup

Host

1. aMG F4Connect + aMG CLCD 2

2. aMG USB Converter N (Optional, to receive output data via UART.

Sensor device

Note: Make sure the selected pin for Trigger Output and PWM Input is 5V tolerant.

Testing

1. Testing result displayed on LCD

2. Testing result displayed on COM port.