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【CW32】UFO Car Bluetooth Brushless Remote Control Car Based on CW32

Overview

UFO Vehicle!

Appearance Gallery

circuit

Main control board, Bluetooth, motor driver, 3.3v, 5v ldo.

The base plate is in charge of RGB. There are several holes on it to connect the main control board and wheels.

structure

Universal wheel

Wheel (brushless motor body)

Tires made of water pipes (^_^)

Velcro covers messy wires

hardware

MCU

Two MCUs are used, both made in China.

CW32F030C8T6 and MCU Pin2Pin from foreign companies, up to 64M.

The CH571K peripheral only requires a capacitor and crystal oscillator to realize the Bluetooth function.

The motor is a small inductive brushless motor, directly driven by the motor driver chip PT2432. PT2432 internally integrates over-current, over-temperature protection and stall protection.

CW32F030C8T6 outputs pwm to PT2432 to control motor rotation, and several gpio are attached to control forward and reverse rotation.

CH571K is connected to CW32F030C8T6 through the serial port, transparently transmits the data sent by the remote Bluetooth, and controls the motor or ws2812 after decoding.

code

Main control chip CW32F030C8T6

Based on the self-sealed template, https://github.com/liux-pro/cw32f030c8t6, with official peripheral library to minimize the trouble of not finding the header file.

To be completed: speed measurement, protection mode detection

Used serial port, timer, PWM, SPI

document	Function
ble.c	Bluetooth module serial communication
clock.c	clock settings
fast_hsv2rgb_8bit.c	Gamut conversion
main.c	Main logic, running water lamp
motor.c	motor control
pwm.c	pwm
ws2812.c	ws2812

Development environment Keil5

https://github.com/liux-pro/ufo-vehicle

Bluetooth chip CH571K

Bluetooth was used in both training camps, so a common Bluetooth communication module was extracted.

After two version iterations, the simple communication firmware based on CH571K is basically available. Please see the readme for specific functions.

Development environmentMounRiver Studio

https://github.com/liux-pro/BLELite

remote control

remote control code

It is actually a web page, developed using js and using vue to simplify data processing.

Use the Web Bluetooth API to call the host's Bluetooth to complete communication, and the Gamepad API handle button information to realize the function of controlling the car through the handle after scanning the code to open the web page, without installing an app.

Code pit

The serial port cannot receive data after using memcpy.

Unresolved, temporarily use for loop to copy

appendix

English abbreviations

Since I have never been exposed to arm MCU, I don’t understand many concepts.

Organizing these abbreviations is helpful for understanding the sample code, but may not be accurate.

abbreviation	meaning
AF	Alternate functions Alternate functions refer to pin port multiplexing
AHB	Advanced High Performance Bus Advanced High Performance Bus (used for fast things such as dma gpio)
APB	Advanced Peripheral Bus Advanced Peripheral Bus (for spi uart i2c and other peripherals)
OD	open drain open drain output
PP	push pull push-pull output
HSI	High-speed internal clock
HSE	High-speed internal clock
PLL	The principle is very complicated, and the effect is frequency doubling
RCC	Reset and Clock Controller
IT	interrupt interrupt
IRQ	interrupt request interrupt request

CW32 Resources

Data sheet

https://www.whxy.com/support/filelist?id=11&p=1

User Manual

https://www.whxy.com/support/filelist?id=12&p=1

keil firmware library

https://www.whxy.com/support/filelist?id=13&p=1

Design Files

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Update:2025-06-23 13:03:24

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