Jane Medium ： Designed and made based on MM32F3277 Of MicroPython Test circuit , Downloaded from SeekFree Known MicroPython, Prove that it can complete normal use .

key word ： MM32F3277,MicroPython, Fast plate making

 

§01 ginseng Test design

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One 、 Design background

I passed the following test the day before yesterday , For those from flying by MicroPython The test board was preliminarily tested ：

• Debugging comes from flying by flying MM32F3277 Transplantation has MicroPython Development board
• Test the flight by flight MM32F3277 MicroPython The basic functions of the development board
• test MM32 MicroPython Test the basic functions of the circuit board

Use in Make smart MCU MM32F3277 The beta The smallest plate made , as well as utilize Python Simulate the mouse to complete automatically MM32-LINK Program download The automatic download process given , Design and make one that can be completed directly MM32F3277 MicroPython Minimum test circuit board .

Two 、 Reference design

stay SeekFree / Flying technology MM32F3277 Open source library Download to fly by fly MM32F3277 Core board circuit design diagram .

▲ chart 1.2.1 Fly by fly MM32F3277 Development board, motherboard packaging and component library

According to the flight by flight OneOS From the debugging interface design of the evaluation board , Its corresponding PIN5-2 The definition of debugging interface is the same as that defined on the minimum mainboard screen の Debugging interfaces are the same .

▲ chart 1.2.2 OneOS Debugging interface in the core board

▲ chart 1.2.3 Fly by fly MM32F3277 Minimum motherboard debugging interface

Therefore, we can know the of flight by flight transplantation MicroPython What is used REPL yes MM32F3277 Of UART1（A9-TX, A10-RX）.

According to the information provided by flight by flight MicroPython Descriptive information ,MicroPython UART Corresponding MM32F3277 Of UART3（B10-TX,B11-RX）.

▲ chart 1.2.4 MicroPython UART Corresponding MM32F3277 Of UART3

3、 ... and 、 Minimum board output resources

1、 Basic system

• Power Supply ;
• RST;
• BOOT0;

2、UART1,3 Output

• UART1;
• UART3;

 

§02 measuring Test the circuit board

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One 、 Circuit design and manufacture ¹

1、 Schematic diagram

▲ chart 2.1.1 Schematic diagram of test circuit board

2、 Rapid plate making PCB

The following is to use A minute One side of quick plate making receipt PCB Territory .

▲ chart 2.1.2 Fast plate making single-sided circuit board design

▲ chart 2.1.3 The test circuit board obtained after one minute

3、 Welding test

（1） Solder circuit board

take Make smart MCU MM32F3277 The beta The single chip microcomputer is disassembled and welded down , Weld on the fabricated single-sided circuit board . Form test circuit board .

▲ chart 2.1.4 Test circuit board after welding

（2） Preliminary power on test

exert +5V voltage , At （AS1117-3.3）PIN2 measurement 3.29V. The operating current is approximately 6mA .

（3） Test clock signal

Install the rear 【3.3.1： download MicroPython】 after , Measure the crystal oscillation signal of the circuit board . It is found that the crystal clock has no oscillation signal . This explanation MicroPython When running, the internal oscillator is used .

▲ chart 2.1.5 After the crystal is soldered off, the chip can still work normally

 

§03 Next load MicroPython

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One 、 Read MicroPython Program

utilize MM32-LINK Read Debugging comes from flying by flying MM32F3277 Transplantation has MicroPython Development board The program on the motherboard .

▲ chart 3.1.1 Use 5PIN Read SeekFree The program in the smallest core board

▲ chart 3.1.2 Read MicroPython Program

Store the read program in ：SeeFreeMP.HEX.

Two 、 test MicroPython

1、 download MicroPython

Put the above HEX Download the file to OneOS In the experimental board .

▲ chart 3.2.1 take SeekFree MicroPython Download to OneOS In the development board

Select serial port as CH340, When you come out on the side, you can CH340 Conduct MicroPython REPL function .

▲ chart 3.2.2 Select serial port as CH340

2、 test MicroPython

Use in Test the flight by flight MM32F3277 MicroPython The basic functions of the development board The establishment of a be based on STM32BOOT-Loader Development tool chain , Write test applet , Download and execute .

（1） The test program

utilize OneOS The buzzer on the beta （ be located B5）, test MicroPython For its operation .

▲ chart 3.2.3 OneOS The buzzer on the

from seekfree import GPIO
beep = GPIO(0x15, 1, 1)
def delay(loop = 50000):
for _ in range(loop):
pass
count = 0
for i in range(10):
beep.high()
delay()
beep.low()
delay()
print(i)

（2） test result

Reset MicroPython...
Wait for MicroPython comeback...
Download MicroPython : 32 lines/665 characters.
Begin to download programm...
-------------------------------------------------------------------------
0
1
2
3
4
5
6
7
8
9
>>>

◎ test result

You can see that after the above test , Download the corresponding program to OneOS On board , It can be executed correctly .

3、 ... and 、 Test circuit board download MicroPython

1、 download MicroPython

▲ chart 3.4.1 download MicroPython Program

2、 test MicroPython

utilize utilize CH340C Make MicroPython ESP8266,ESP32 The downloader - Improved Connect UART1 Corresponding REPL, test MicroPython REPL.

（1） Test code

from seekfree import GPIO
beep = GPIO(0x12, 1, 1)
def delay(loop = 50000):
for _ in range(loop):
pass
count = 0
for i in range(1000):
beep.high()
delay(20000)
beep.low()
delay(20000)
print(i)

（2） test result

▲ chart 3.4.2 Running test results

 

※ measuring Try to summarize ※

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set up Based on MM32F3277 Of MicroPython Test circuit , Downloaded from SeekFree Known MicroPython, Prove that it can complete normal use .

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■ Links to related literature :

• Debugging comes from flying by flying MM32F3277 Transplantation has MicroPython Development board
• Test the flight by flight MM32F3277 MicroPython The basic functions of the development board
• test MM32 MicroPython Test the basic functions of the circuit board
• Make smart MCU MM32F3277 The beta
• utilize Python Simulate the mouse to complete automatically MM32-LINK Program download
• SeekFree / Flying technology MM32F3277 Open source library
• One minute plate making method
• utilize CH340C Make MicroPython ESP8266,ESP32 The downloader - Improved

● Related chart Links :

• chart 1.2.1 Fly by fly MM32F3277 Development board, motherboard packaging and component library
• chart 1.2.2 OneOS Debugging interface in the core board
• chart 1.2.3 Fly by fly MM32F3277 Minimum motherboard debugging interface
• chart 1.2.4 MicroPython UART Corresponding MM32F3277 Of UART3
• chart 2.1.1 Schematic diagram of test circuit board
• chart 2.1.2 Fast plate making single-sided circuit board design
• chart 2.1.3 The test circuit board obtained after one minute
• chart 2.1.4 Test circuit board after welding
• chart 2.1.5 After the crystal is soldered off, the chip can still work normally
• chart 3.1.1 Use 5PIN Read SeekFree The program in the smallest core board
• chart 3.1.2 Read MicroPython Program
• chart 3.2.1 take SeekFree MicroPython Download to OneOS In the development board
• chart 3.2.2 Select serial port as CH340
• chart 3.2.3 OneOS The buzzer on the
• chart 3.4.1 download MicroPython Program
• chart 3.4.2 Running test results

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1. MM32 MicroPython Small board development project Wendan :AD\MM32\TestMM32\TestMicroPythonMM32F3277.SchDoc ︎