PRO MICRO 5V 16MHZ Development Board
Content
1. Description
2. Specification
3. Pin Interfaces
4. Specialized Functions of Pins
5. Download the Arduino IDE
- Step 1 Installing Driver
- Step 2 Set Boards Manager
- Step 3 Arduino IDE Setting
- 4 Hello World!
6. Package List
1. Description
The processor core of Keyestudio PRO MICRO development board is ATMEGA32U4-MU, fully compatible with ARDUINO. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable to get started.
It has 18 digital input/output pins (of which 5 can be used as PWM output), 9 analog input, a 16 MHz crystal oscillator and a micro USB port. In addition, its working voltage is 5V and we can supply power via micro USB cable and port RAW GND (DC 7-9V).
It is easy to integrate this Micro in everyday objects to make them interactive.
To facilitate the physical design, the board is not welded with pin headers, so you can solder the pin headers by yourself. And the package includes 2pcs of yellow 1*12 2.54 straight pins and 1m black micro USB cable.
2. Specification
- Microcontroller:ATMEGA32U4-MU
- RAW: DC 7-9V
- VCC: 5V at 500mA
- Digital I/O Pins:18 (of which 5 provide PWM output)
- Analog Input Pins:9
- Maximum current for chip: 200mA
- Maximum current per pin: 40mA
- Recommended current per pin: 20mA
- 8-bit Atmel AVR
- Flash Program Memory: 32kB
- EEPROM: 1kB
- Internal SRAM 2.5kB
- ADC:10-bit
- PWM:8bit
Pin Interfaces:
3. Specialized Functions of Pins:
Digital Port：RX（D0）、TX（D1）、D2-D10、D14-D16、A0-A3（D18-D21）
Analog Port：A0-A3、D4（A6）、D6（A7）、D8（A8）、D9（A9）、D10（A10）
PWM Port (Pulse-Width Modulation): D3、D5、D6、D9、D10
External interrupt: D3(interrupt 0), D2(interrupt 1), D0(interrupt 2), D1(interrupt 3) and D7(interrupt 4)
Serial Communication Port: RX (D0) ,TX (D1)
SPI Communication Port: D14 (MISO), D15 (SCLK) and D16 (MOSI)
I2C Communication Port: D2 (SDA) and D3 (SCL）
RAW: External power DC 7-9V
4. Download the Arduino IDE
Enter Arduino IDE official website：https://www.arduino.cc/，
Click the "SOFTWARE" tab.
You can download 1.8.13 version
In this project, we use 1.8.12 version
Click "Previous Release (1.8.12)" to select the file to be installed.
You need to install it manually if you click "Windows Installer", however, the file can be installed directly if you click "Windows ZIP file for non admin install"
5.1 Installing Driver
Windows 10:
The driver will be automatically installed if you plug control board to your computer. Then the COM port is show below:
You need to install it manually if your computer is other Windows system.
We will take win7 system as example.
1. Place the driver folder on your desktop.
The driver files are shown below:
2. Connect board to your PC with Micro USB cable, open device manager.
3. Right-click it and yellow exclamation mark appears
4. Click “Browse.....manually”
5. Find the “drivers” file, and tap “Next”.
6. Click “install this driver software anyway”
7. Then click “Close” and check the serial port.
5.2 Set Boards Manager
We need to set board before using it. Firstly we need to add the website of board manager in the "Preferences"
Website: https://raw.githubusercontent.com/sparkfun/Arduino_Boards/master/IDE_Board_Manager/package_sparkfun_index.json
As shown below:
Then restart Arduino IDE.
The board is shown below:
Search sparkfun and install the related files.
Click “Close” when the installation is finished.
Then find "SparkFun Pro Micro" as follows:
5.3 Arduino IDE Setting
Click icon, open Arduino IDE.
To avoid the errors when uploading the program to the board, you need to select the correct Arduino board that matches the board connected to your computer.
Then come back to the Arduino software, you should click Tools→Board, select the board.
(as shown below)
Then select the correct working frequency
Then select the correct COM port (you can see the corresponding COM port after the driver is successfully installed).
Before uploading the program to the board, let’s demonstrate the function of each symbol in the Arduino IDE toolbar.
A- Used to verify whether there is any compiling mistakes or not.
B- Used to upload the sketch to your Arduino board.
C- Used to create shortcut window of a new sketch.
D- Used to directly open an example sketch.
E- Used to save the sketch.
F- Used to send the serial data received from board to the serial monitor.
5.4 Hello World!
Copy the following code to Arduino IDE.
int val;
int ledpin=13;
void setup()
{
Serial.begin(9600);
pinMode(ledpin,OUTPUT);
}
void loop()
{
val=Serial.read();
if(val=='R')
{
digitalWrite(ledpin,HIGH);
delay(500);
digitalWrite(ledpin,LOW);
delay(500);
Serial.println("Hello World!");
}
}
Set board and COM port, the corresponding board and COM port are shown on the lower right of IDE.
Click the Check Mark to start compiling the program, and check errors.
Click → to upload the program, upload successfully.
Tap
to open serial monitor, set baud rate to 9600, input "R" and click “Send”. Then RX indicator flashes and serial monitor shows "Hello World!", which means "Hello World!" is sent by PRO MICRO development board.
