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.
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).
| 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 timer 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.
