HARDWARE DESIGN
NUCLEO-F411RE
The NUCLEO-F411RE is an STM32 Nucleo development board with STM32F411RET6 MCU which enables the user to build the desired prototypes for embedded applications. It has Arduino connectivity support and ST Morpho headers which allows for the expansion of the STM32 Nucleo open development platform with a wide choice of specialized shields. It does not require a separate probe as it integrates the ST-LINK/V2-1 debugger and programmer. The STM32 Nucleo board series is based on ARM Cortex-M 32-bit RISC cores optimized for high performance and energy efficiency. ARM Cortex-M features a high-density instruction set and a Nested Vectored Interrupt Controller (NVIC) providing excellent interrupt handling abilities.
The processor of the NUCLEO-F411RE board has three general-purpose inputs/outputs, known as GPIO. There are three ports for GIPO, which are port A, port B, and port C. Each port can have up to 16 pins.
NUCLEO-F411RE Development Board Structure
Components in NUCLEO-F411RE Board
Hardware Layout of NUCLEO-F411RE
Components
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HC-SR04 Ultrasonic sensor
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is used to measure distance by using ultrasonic waves.
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The sensor head emits an ultrasonic wave and receives the wave reflected back from the object.
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It measures the distance to the object by measuring the time between the emission and reception.
Connection of HC-SR04 Ultrasonic Sensor to Nucleo Board F411RE:
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5V Supply
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Trigger Pulse Input
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Echo Pulse Output
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0V Ground
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LCD
Display output value(Distance) collected from the sensor.
Connection of LCD to Nucleo Board F411RE:
a.LCD was connected to the NUCLEO Board.
b. Vss was connected to the ground.
c. Vdd was connected to 5V.
d. Vo was connected to 2 1kΩ resistor and to the ground.
e. RS was connected to PB0.
f. RW was connected to PB1.
g. E was connected to PB2.
h. D0 was connected to PC0.
i. D1 was connected to PC1.
j. D2 was connected to PC2.
k. D3 was connected to PC3.
l. D4 was connected to PC4.
m. D5 was connected to PC5.
n. D6 was connected to PC6.
o. D7 was connected to PC7.
p. A was connected to 5V.
q. K was connected to the ground.
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LED
LED is used to light up to indicate the range of the distance between the object and the car
Connection of LED to Nucleo Board F411RE:
1. Positive Terminal of Green Led to pin D7
2. Positive Terminal of Yellow Led to pin D4
3. Positive Terminal of Red Led to pin D2
4. Negative Terminal of Green, Yellow and Red Led to the Ground
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BUZZER
The sound intensity of the buzzer is used to indicate the range of the distance between the object and the car
Connection of Buzzer to Nucleo Board F411RE:
Connect the buzzer to the pin D5 of the NUCLEO-F411RE board.
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RESISTOR
To limit the current through the LED and prevent excess current that can burn out the LED