New 32 bit Device, Maple Mini STM32 Based Arduino Compatible by 4€

[Juan Pinto]

Hi all!, am agree to bring us a new device to use on our Souliss Network, Its a 32bit Cortex MCU with many good things, 34 IO pins 12 PWM and more... It cost 4€ on Aliexpress :P

 

MapleMini:

 

 

• MCU: STM32F103RCBT6, a 32-bit ARM Cortex M3 microprocessor
• Clock Speed: 72 MHz
• 128 KB Flash and 20 KB SRAM
• 34 digital I/ pins (GPIOs)
• 12 PWM pins at 16 bit resolution
• 9 analog input (ADC) pins at 12 bit resolution
• 2 SPI peripherals
• 2 I2C peripherals
• 7 Channels of Direct Memory Access (DMA) (dma.h)
• 3 USART (serial port) peripherals
• 1 advanced and 3 general-purpose timers
• Dedicated USB port for programming and communications
• JTAG
• Nested Vectored Interrupt Controller (NVIC) (including external interrupt on GPIOs)
• Supplies up to 500 mA at 3.3 V, with separate 250 mA digital and analog regulators for low-noise analog performance
• Open source, four layer design
• Support for low power, sleep, and standby modes (<500 μA)
• Operating Voltage: 3.3 V
• Input Voltage (recommended): 3 V — 12 V
• Dimensions: 2.02″ × 0.72″

http://leaflabs.com/docs/hardware/maple-mini.html

 

Here are the steps to use and compile STM32 on Arduino IDE 1.6.4 :

 

1. Download the Arduino IDE 1.6.4 (just the zip file = ~143MB)
2. Extract it on your Hard drive (ex c:\arduino)
3. Download the STM32Duino.
4. Extract the master.zip file.
5. You will see a folder named Arduino_STM32-master. Rename it to Arduino_STM32
6. Copy that folder in to c:\arduino\hardware folder.
7. Run the arduino.exe from your c:\arduino folder (c:\arduino\arduino.exe)
8. Go to Tools -> Board -> Boards Manager and click on Arduino SAM Boards (32-bits ARM Cortex-M3)
9. Cick on Install.
10. Wait some time until the package is downloaded and installed.
11. Restart your arduino IDE.

 

It includes an ethernet ENC28J60 based library that works well, I asked to Dario and he need some time to integrate it on Souliss, be patient :)

 

For now we can conect to other node via USART, Im working to integrate the MCU on Souliss but for now some modifications are needed to make Souliss working:

 

I added this at the start of the sketch:

 

#define USARTDRIVER_INSKETCH 

  #define USARTDRIVER   Serial1          //Serial1 is Rx1 and Tx1 on Pins 25 and 26 of Maple Mini

 

And commented out the lines from vNetDriver_usart.cpp:

 

# //include "SoftwareSerial.h"

//extern SoftwareSerial myUSARTDRIVER; // RX, TX

# //define USART_LOG myUSARTDRIVER.print

 

I founded a problem with DigIn function, isn't work, I tried with a digitalRead and works well, problem is this line on Souliss.h:

 

# define MAXINPIN 32//29 // Max number of input pins

Needs to be changed to 32 to use the PIN 32 (default button) on Maple Mini.

 

You can use any USART example to make it working :)

 

Regards

[Di Maio, Dario]

Good work :)

From Mobile.

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[Fulvio Spelta]

Great, our nodes will always ask for power:-)

[guyc]

Juan,
Is this integration still ongoing ? I Mean can the stm32 be used as gateway or only as Peernode

[Juan Pinto]

I don't know, now am using an ESP as GW

2017-05-16 12:56 GMT+02:00 'guyc' via souliss <sou...@googlegroups.com>:

Juan,
Is this integration still ongoing ? I Mean can the stm32 be used as gateway or only as Peernode

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