rt-thread/bsp/stm32/stm32f412-st-nucleo/applications/arduino_pinout

The Arduino Compatible for STM32F412 Nucleo Board

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1 RTduino - Arduino Ecosystem Compatibility Layer for RT-Thread

STM32F412 Nucleo board has support 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 to see the details.

Hardware Drivers Config --->
    Onboard Peripheral Drivers --->
        [*] Compatible with Arduino Ecosystem (RTduino)

2 Arduino Pinout

This board complies with Arduino UNO pins layout. For more details, please take a look at: pins_arduino.c and 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)	PF15	Yes
3 (D3)	PE13	Yes	PWM1-CH3. Token over by RT-Thread PWM device by default
4 (D4)	PF14	Yes
5 (D5)	PE11	Yes	PWM1-CH2. Token over by RT-Thread PWM device by default
6 (D6)	PE9	Yes	PWM1-CH1. Token over by RT-Thread PWM device by default
7 (D7)	PF13	Yes
8 (D8)	PF12	Yes
9 (D9)	PD15	Yes	PWM4-CH4. Token over by RT-Thread PWM device by default
10 (D10)	PD14	Yes	PWM4-CH3. Token over by RT-Thread PWM device by default
11 (D11)	PA7	Yes	PWM14-CH1. Token over by RT-Thread PWM device by default
12 (D12)	PA6	Yes
13 (D13)	PA5	Yes
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)	PC13	Yes	USER Button
17 (D17, LED_BUILTIN)	PB0	Yes	USER LED1
18 (D18)	PB7	Yes	USER LED2
19 (D19)	PB14	Yes	USER LED3
A0	PA3	Yes	ADC1-CH3. Token over by RT-Thread ADC device by default
A1	PC0	Yes	ADC1-CH10. Token over by RT-Thread ADC device by default
A2	PC3	Yes	ADC1-CH13. Token over by RT-Thread ADC device by default
A3	PC1	Yes	ADC1-CH11. Token over by RT-Thread ADC device by default
A4	PC4	Yes	ADC1-CH14. Token over by RT-Thread ADC device by default
A5	PC5	Yes	ADC1-CH15. 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. STM32 Nucleo-144 user manual

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

The SPI bus of the Nucleo board is the CS/D10, MOSI/D11, MISO/D12 and SCK/D13 pins printed on the board. These D11, D12 and D13 pins It is taken over by the RT-Thread SPI device framework and there is no need to directly control these pins. User needs to operate D10 chip select pin. Directly quote #include <SPI.h> (Arduino official SPI header file) to use. After using the SPI function, the PWM function of D10 and D11 will be irreversibly disabled and converted to the SPI function.

3.3 Serial

This board supports to use Serial. method to operate uart3 device. See example.