1# The Arduino Compatible for STM32F072 Nucleo Board 2 3**English** | [中文](README_zh.md) 4 5## 1 RTduino - Arduino Ecosystem Compatibility Layer for RT-Thread 6 7STM32F072 Nucleo board has support [RTduino](https://github.com/RTduino/RTduino). Users can use Arduino APIs, third party libraries and programming method to program on the board. 8 9### 1.1 How to Enable RTduino 10 11Please go to the [RTduino repository](https://github.com/RTduino/RTduino) to see the details. 12 13```Kconfig 14Hardware Drivers Config ---> 15 Onboard Peripheral Drivers ---> 16 [*] Compatible with Arduino Ecosystem (RTduino) 17``` 18 19## 2 Arduino Pinout 20 21 22 23This board complies with Arduino UNO pins layout. For more details, please take a look at: [pins_arduino.c](pins_arduino.c) and [pins_arduino.h](pins_arduino.h). 24 25| Arduino Pin | STM32 Pin | 5V Tolerate | Note | 26| --------------------- | --------- | ----------- | --------------------------------------------------------------------------------------------- | 27| 0 (D0) | PA3 | No | Serial-Rx. Token over by RT-Thread UART device by default | 28| 1 (D1) | PA2 | No | Serial-Tx. Token over by RT-Thread UART device by default | 29| 2 (D2) | PA10 | Yes | | 30| 3 (D3) | PB3 | Yes | PWM2-CH2. Token over by RT-Thread PWM device by default | 31| 4 (D4) | PB5 | Yes | | 32| 5 (D5) | PB4 | Yes | PWM3-CH1. Token over by RT-Thread PWM device by default | 33| 6 (D6) | PB10 | Yes | PWM2-CH3. Token over by RT-Thread PWM device by default | 34| 7 (D7) | PA8 | Yes | | 35| 8 (D8) | PA9 | Yes | | 36| 9 (D9) | PC7 | Yes | PWM3-CH2. Token over by RT-Thread PWM device by default | 37| 10 (D10) | PB6 | Yes | PWM16-CHN1. Token over by RT-Thread PWM device by default | 38| 11 (D11) | PA7 | No | PWM17-CH1. Token over by RT-Thread PWM device by default | 39| 12 (D12) | PA6 | No | | 40| 13 (D13, LED_BUILTIN) | PA5 | No | USER LED | 41| 14 (D14) | PB9 | Yes | I2C-SDA. Token over by RT-Thread I2C device by default | 42| 15 (D15) | PB8 | Yes | I2C-SCL. Token over by RT-Thread I2C device by default | 43| 16 (D16) | PC13 | No | USER Button | 44| A0 | PA0 | No | ADC1-CH0. Token over by RT-Thread ADC device by default | 45| A1 | PA1 | No | ADC1-CH1. Token over by RT-Thread ADC device by default | 46| A2 | PA4 | No | ADC1-CH4. Token over by RT-Thread ADC device by default | 47| A3 | PB0 | No | ADC1-CH8. Token over by RT-Thread ADC device by default | 48| A4 | PC1 | No | ADC1-CH11. Token over by RT-Thread ADC device by default | 49| A5 | PC0 | No | ADC1-CH10. Token over by RT-Thread ADC device by default | 50| A6 | -- | | On-chip internal voltage sensor. ADC1-CH17. Token over by RT-Thread ADC device by default | 51| A7 | -- | | On-chip internal temperature sensor. ADC1-CH16. Token over by RT-Thread ADC device by default | 52 53> Notice: 54> 55> 1. Don't use a same hardware timer to drive PWM (analogRead) and servos at same time, because hardware timers can only generate a same frequency for 4 PWM channels. Otherwise, it could cause a failure when drive servos. 56 57> References 58> 59> 1. [STM32 Nucleo-64 user manual](https://www.st.com/resource/en/user_manual/um1724-stm32-nucleo64-boards-mb1136-stmicroelectronics.pdf) 60 61## 3 Communication 62 63### 3.1 I2C Bus 64 65I2C bus is `SCL/D15` and `SDA/D14` pins. Users can directly include the `#include <Wire.h>`, which is the Arduino official I2C header file, to use the I2C bus. 66 67### 3.2 SPI Bus 68 69This board doesn't support Arduino SPI header file and functions. 70 71### 3.3 Serial 72 73This board supports to use `Serial.` method to operate `uart2` device. See [example](https://github.com/RTduino/RTduino/blob/master/examples/Basic/helloworld.cpp). 74
