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WiFi Interfacing

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siddhantabhy
Associate

‎2024-05-31 03:05 AM

Hello everyone,

Currently I am using STM32F407 and trying it to interface it with esp32 using SPI protocol. Can anyone help me with that. Is it even possible or not ?

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ghrairim
ST Employee

‎2024-05-31 03:33 AM

Hello @siddhantabhy ,

Yes, it is possible to interface an STM32F407 microcontroller with an ESP32 using the SPI protocol. 

First, you need to make the physical connections between the STM32F407 and ESP32. (SCK , MOSI , MISO and GND). Then you'll need to configure the SPI peripheral on the STM32F407 to act as the master device. This can be done using STM32CubeMX or directly through the HAL library. On the ESP32 side, you need to configure it as a SPI slave device. Once both devices are configured, you can start transferring data. Use the HAL_SPI_Transmit() and HAL_SPI_Receive() functions on the STM32 side and the corresponding spi_slave_transmit()  function on the ESP32 side . Finally ensure that the SPI settings (clock polarity, phase, and speed) match on both devices and remember to consult the datasheet and reference manual of both STM32F407 and ESP32 for specific details on SPI peripheral configuration and pin assignments.

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AScha.3
Chief

‎2024-05-31 03:12 AM

Hi,

>Is it even possible or not ?

Yes, why not ?

> interface it with esp32 using SPI protocol

I have an ESP8266 sending data on spi -> STM32 spi -> DMA , at 32 Mbit, running fine.

 

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ghrairim
ST Employee

‎2024-05-31 03:33 AM

Hello @siddhantabhy ,

Yes, it is possible to interface an STM32F407 microcontroller with an ESP32 using the SPI protocol. 

First, you need to make the physical connections between the STM32F407 and ESP32. (SCK , MOSI , MISO and GND). Then you'll need to configure the SPI peripheral on the STM32F407 to act as the master device. This can be done using STM32CubeMX or directly through the HAL library. On the ESP32 side, you need to configure it as a SPI slave device. Once both devices are configured, you can start transferring data. Use the HAL_SPI_Transmit() and HAL_SPI_Receive() functions on the STM32 side and the corresponding spi_slave_transmit()  function on the ESP32 side . Finally ensure that the SPI settings (clock polarity, phase, and speed) match on both devices and remember to consult the datasheet and reference manual of both STM32F407 and ESP32 for specific details on SPI peripheral configuration and pin assignments.

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