# The Arduino Compatible for STM32F469 Discovery Board **English** | [中文](README_zh.md) ## 1 RTduino - Arduino Ecosystem Compatibility Layer for RT-Thread STM32F469 Discovery 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. ### 1.1 How to Enable RTduino Please go to the [RTduino repository](https://github.com/RTduino/RTduino) to see the details. ```Kconfig Hardware Drivers Config ---> Onboard Peripheral Drivers ---> [*] Compatible with Arduino Ecosystem (RTduino) ``` ## 2 Arduino Pinout ![disco-f469-pinout](disco-f469-pinout.png) This 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). | Arduino Pin | STM32 Pin | 5V Tolerate | Note | | --------------------- | --------- | ----------- | --------------------------------------------------------------------------------------------- | | 0 (D0) | PG9 | Yes | Serial-Rx. Token over by RT-Thread UART device by default | | 1 (D1) | PG14 | Yes | Serial-Tx. Token over by RT-Thread UART device by default | | 2 (D2) | PG13 | Yes | | | 3 (D3) | PA1 | Yes | PWM2-CH2. Token over by RT-Thread PWM device by default | | 4 (D4) | PG12 | Yes | | | 5 (D5) | PA2 | Yes | PWM2-CH3. Token over by RT-Thread PWM device by default | | 6 (D6) | PA6 | Yes | PWM3-CH1. Token over by RT-Thread PWM device by default | | 7 (D7) | PG11 | Yes | | | 8 (D8) | PG10 | Yes | | | 9 (D9) | PA7 | Yes | PWM3-CH2. Token over by RT-Thread PWM device by default | | 10 (D10) | PH6 | Yes | PWM12-CH1. Token over by RT-Thread PWM device by default | | 11 (D11) | PB15 | Yes | PWM12-CH2. Token over by RT-Thread PWM device by default | | 12 (D12) | PB14 | Yes | | | 13 (D13, LED_BUILTIN) | PD3 | Yes | USER LED1 | | 14 (D14) | PB9 | Yes | I2C-SDA. Token over by RT-Thread I2C device by default | | 15 (D15) | PB8 | Yes | I2C-SCL. Token over by RT-Thread I2C device by default | | 16 (D16) | PA0 | Yes | USER Button | | 17(D17) | PG6 | Yes | USER LED2 | | 18(D18) | PD4 | Yes | USER LED3 | | 19(D19) | PD5 | Yes | USER LED4 | | 20(D20) | PK3 | Yes | USER LED5 | | A0 | PB1 | Yes | ADC1-CH9. Token over by RT-Thread ADC device by default | | A1 | PC2 | Yes | ADC1-CH12. Token over by RT-Thread ADC device by default | | A2 | PC3 | Yes | ADC1-CH13. Token over by RT-Thread ADC device by default | | A3 | PC4 | Yes | ADC1-CH14. Token over by RT-Thread ADC device by default | | A4 | PC5 | Yes | ADC1-CH15. Token over by RT-Thread ADC device by default | | A5 | PA4 | Yes | ADC1-CH4. Token over by RT-Thread ADC device by default | | A6 | -- | | On-chip internal voltage sensor. ADC1-CH17. Token over by RT-Thread ADC device by default | | A7 | -- | | On-chip internal temperature sensor. ADC1-CH16. Token over by RT-Thread ADC device by default | > Notice: > > 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. > References > > 1. [STM32F469 Discovery ST Website](https://www.st.com/en/evaluation-tools/32f469idiscovery.html#documentation) ## 3 Communication ### 3.1 I2C Bus I2C 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. ### 3.2 SPI Bus This board doesn't support Arduino SPI header file and functions. ### 3.3 Serial This board supports to use `Serial.` method to operate `uart3` device. See [example](https://github.com/RTduino/RTduino/blob/master/examples/Basic/helloworld.cpp). ### 3.4 USB Virtual Serial This board supports USB virtual serial. See [example](https://github.com/RTduino/RTduino/tree/master/examples/USBSerial). You may enable it if is needed. ```Kconfig RT-Thread online packages ---> Arduino libraries ---> [*] RTduino: Arduino Ecological Compatibility Layer [*] Enable USB Serial ```