SPI connection to Jetson Orin nano developer kit

[Zenen]

Hi everyone,

I am trying to read pulses of a rotary incremental encoder npn  on the screen connected to a Jetson sbc, through SPI connection with a STM32 NUCLEO-G474RE. On CubeMx i already modified pins, generated code and flashed on stm32. Once i run the python code on Jetson, no pulses are seen on the monitor. 

Do you have any suggestion?

Thank you in advance.

Enrico

[Mike_ST]

Hello,

You give little details about the setup, please read the following topic:

How to write your question 

We can only help on the STM32 part here.

Post .ioc, source code, pictures etc.

Maybe some body will have some idea.

[Zenen]

Hello,

Enclosed the .ioc and main file from cubeIDE and cubeMX. Below the pin configuration and wire connection.

Pin configuration, made with cubeMX, is the following- PLEASE CHECK THE COMMENT FOR PA5-:

PA0 = TIM2_CH1

PA1 = TIM2_CH2

TIM2 configured as: Encoder Mode - encoder mode TI1 and TI2

PA0 and PA1  are enabled Pull-up

PA4 = SPI1_NSS

PA5 = SPI1_SCK (I activated and after code generated, it become deactivated automatically )

PA6 = SPI1_MISO

PA7 = SPI1_MOSI

SPI1 configured as:

Full Duplex Slave- 8-bit - MSB first - Clock polarity low - Clock phase 1 edge - Hardware NSS input - SPI1 enabled global interrupt

Connections between encoder and stm32, as well as between stm32 and Jetson, are done using Arduino pins CN5-CN6-CN8.

Here below the wire connections:

Encoder    NUCLEO

Green A	A0 / PA0
White B	A1 / PA1
Red	5V
Black	GND
Gray	GND

Jetson pin   Signal      NUCLEO

Pin 23	SCK	D13 / PA5
Pin 21	MISO	D12 / PA6
Pin 19	MOSI	D11 / PA7
Pin 24	CS	D10 / PA4
Pin 6	GND	GND

Thank you in advance for your support!

Best regards,

Enrico

[Mike_ST]

Hello,

The green LED is on PA5 on this board.

you should try commenting:

/* Initialize led */
BSP_LED_Init(LED_GREEN);

Maybe removing SB6 as well, if that disturbs the SPI communication.