【CW32】BrushlessMotor

Foreword:

-In the current electronics market where supply is changing rapidly, domestic chip manufacturing technology is gradually maturing, and domestic chips are worth considering. . .

-Wuhan Xinyuan Semiconductor and Shenzhen Lichuang E-Commerce Co., Ltd.  

-Lichuang Mall, a one-stop component procurement platform, is really easy to use! Lots of information.

-Chuangxin Workshop Technology (Shenzhen) Co. , Ltd. Programs are delivered online and burned securely in the cloud.

Figure 1: Overall renderings

Plan ideas:

  1.Hardware design

a. Power supply part: 12V adapter power supply and USB dual power supply mode. Dual power supplies will provide effective current output capabilities in high power projects.

b. Main control part: Today’s protagonist is CW32F030C8, a high-performance ARM 32-bit core chip.

c. Program download and serial port communication: both PWLINK and Jlink are available. It adopts SW download method and supports online debugging. It can be done with a simple 5P socket!

d. Function part: - 0.96'' OLED, you can get a 128*64 small screen with IIC protocol for about 10 yuan from a certain store!

 - Beep buzzer, I made it into a small module, using latex base links for easy cutting!

 - Extended TFTLCD, 4.3-inch true color touch screen! I boldly tried to drive it once, and it drove perfectly under the 32-bit ARM core!

  2. Software writing (By MDK5 compiler)

a. Function introduction: system solution

-->Initialize the system clock 24M after power-on, initialize OLED, etc.

-->Enter the main loop, because the knob potentiometer is not used, and given a fixed value, the motor will enter the start-up state.

-->Complete

b. Logic code: select the key points to focus on.

--accomplish:

1>Voltage collection:

The voltages of the three phases of UVW are read by switching a single channel at a time through DMA according to the routine! After reading, the read value is refreshed every 100ms in the main function!

2>PWM output:

This chip has an ATIM advanced timer and supports 6 independent PWM outputs and 3 pairs of complementary PWM outputs.

-Upper bridge PWM: U+ PA8; V+ PA9; W+ PA10

-Lower bridge GPIO: U- PB13; V- PB14; W- PB15

3>OLED display 128*64: simple IO simulation IIC

xOLED_ShowStr(....): Display string. @Parameters: x coordinate, y page number, the string to be displayed "starting point coordinates (x: 0~127, y: 0~7)". TextSize font size.

xOLED_ShowNum(....): Display numbers and variables. @Parameters: x coordinate, y page number, value to be displayed (0-9999). TextSize font size.

void xOLED_DrawBMP(....): Display bitmap. @Parameter: x0 starting point x, y0 starting point y, x1 end point x, y1 end point y, BMP[] bitmap array.

4>Beep: Three wires: power, ground, and switch. If the switch is set high, it will beep, if it is set low, it will stop. Simple driver logic.

5>(Expansion)TFTLCD: In the system, you can switch to 3.3V power supply mode, and there is a 28P interface on the back of the main control board.

Show results:

Figure: Startup interface

          Figure: LED indicator light                     

Figure: LCD driver demonstration

Precautions:

        *note1: When downloading, select the SW download method.

Motor materials:

        *note1: A certain treasure .