1# The Arduino Compatible for STM32F103 Blue Pill Board 2 3**English** | [中文](README_zh.md) 4 5## 1 RTduino - Arduino Ecosystem Compatibility Layer for RT-Thread 6 7STM32 Blue Pill 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 21For more information, please see [pins_arduino.c](pins_arduino.c) and [pins_arduino.h](pins_arduino.h). 22 23 24 25| Arduino Pin | STM32 Pin | 5V Tolerate | Note | 26| ------------------- | --------- | ----------- | ----------------------------------------------------------------------------------------------------------- | 27| 0 (D0) | PB7 | Yes | | 28| 1 (D1) | PB6 | Yes | | 29| 2 (D2) | PB5 | No | PWM3-CH2. Token over by RT-Thread PWM device by default | 30| 3 (D3) | PB4 | Yes | PWM3-CH1. Token over by RT-Thread PWM device by default | 31| 4 (D4) | PB3 | Yes | PWM2-CH2. Token over by RT-Thread PWM device by default | 32| 5 (D5) | PA15 | Yes | PWM2-CH1. Token over by RT-Thread PWM device by default | 33| 6 (D6) | PA8 | Yes | | 34| 7 (D7, SS) | PB12 | Yes | SPI chip select by default | 35| 8 (D8, LED_BUILTIN) | PC13 | No | USER LED | 36| 9 (D9) | PC14 | No | | 37| 10 (D10) | PC15 | No | | 38| 11 (D11) | PA0 | No | | 39| 12 (D12) | PB0 | No | PWM3-CH3. Token over by RT-Thread PWM device by default | 40| 13 (D13) | PB1 | No | PWM3-CH4. Token over by RT-Thread PWM device by default | 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) | PA12 | Yes | USB-DP. Token over by [TinyUSB](https://github.com/RT-Thread-packages/tinyusb) software package by default. | 44| 17 (D17) | PA11 | Yes | USB-DM. Token over by [TinyUSB](https://github.com/RT-Thread-packages/tinyusb) software package by default. | 45| 18 (D18) | PA10 | Yes | Serial-Rx. Token over by RT-Thread UART device by default | 46| 19 (D19) | PA9 | Yes | Serial-Tx. Token over by RT-Thread UART device by default | 47| 20 (D20) | PA2 | No | Serial2-Tx. Token over by RT-Thread UART device by default | 48| 21 (D21) | PA3 | No | Serial2-Rx. Token over by RT-Thread UART device by default | 49| 22 (D22) | PB10 | Yes | Serial3-Tx. Token over by RT-Thread UART device by default | 50| 23 (D23) | PB11 | Yes | Serial3-Rx. Token over by RT-Thread UART device by default | 51| 24 (D24) | PB15 | Yes | SPI-MOSI. Token over by RT-Thread SPI device by default | 52| 25 (D25) | PB14 | Yes | SPI-MISO. Token over by RT-Thread SPI device by default | 53| 26 (D26) | PB13 | Yes | SPI-SCK. Token over by RT-Thread SPI device by default | 54| 27 (A0) | PA1 | No | ADC1-CH1. Token over by RT-Thread ADC device by default | 55| 28 (A1) | PA4 | No | ADC1-CH4. Token over by RT-Thread ADC device by default | 56| 29 (A2) | PA5 | No | ADC1-CH5. Token over by RT-Thread ADC device by default | 57| 30 (A3) | PA6 | No | ADC1-CH6. Token over by RT-Thread ADC device by default | 58| 31 (A4) | PA7 | No | ADC1-CH7. Token over by RT-Thread ADC device by default | 59| 32 (A5) | -- | | ADC of chip internal reference voltage. Token over by RT-Thread ADC device by default | 60| 33 (A6) | -- | | ADC of chip internal temperature. Token over by RT-Thread ADC device by default | 61 62> Notice: 63> 64> 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. 65 66## 3 Communication 67 68### 3.1 I2C Bus 69 70I2C bus is `D14` and `D15` pins. Users can directly include the `#include <Wire.h>`, which is the Arduino official I2C header file, to use the I2C bus. 71 72### 3.2 SPI Bus 73 74SPI bus is `D24`, `D25` and `D26` pins. Users can directly include the `#include <SPI.h>`, which is the Arduino official SPI header file, to use the SPI bus. In addition, chip select pin (SS) also is used, which is `D7` by default. 75 76### 3.3 Serial 77 78This board supports to use `Serial.` method to operate `uart1` device; use `Serial2.` method to use `uart2` device; use `Serial3.` method to use `uart3` device. See [example](https://github.com/RTduino/RTduino/blob/master/examples/Basic/helloworld.cpp). 79 80### 3.4 USB Virtual Serial 81 82This board supports USB virtual serial. See [example](https://github.com/RTduino/RTduino/tree/master/examples/USBSerial). You may enable it if is needed. 83 84```Kconfig 85RT-Thread online packages ---> 86 Arduino libraries ---> 87 [*] RTduino: Arduino Ecological Compatibility Layer 88 [*] Enable USB Serial 89``` 90
