Differences between F411RE and F767ZI SPI interfaces?

RH38 · ‎2025-05-19

Hi,
I am accessing a DRV8873s motor driver (SPI version) on two different NUCLEO boards. My usage is limited to reading data from 2 registries.
I got it to work on a NUCLEO-STM32F411RE using SPI2, with the following settings:
Motorola format, 8 bits, MSB first, prescaler 32 to get a 1.5625 Mbits/s rate, CPOL = low and CPHA = 2Edge.Now I try to do the same with a NUCLEO-STM32F767ZI and the same code and configuration (apart from the baud rate, set to 1.6875 MHz) don't work anymore.
I have tried SPI4 and SPI5 on this board with the same result: the data read by HAL_SPI_TransmitReceive is not correct.
Is there a difference in the way STM32F4 and STM32F7 perform SPI communication, or in the electronics?

Andrew Neil · ‎2025-05-19

Welcome to the forum.

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@RH38 wrote:
I got it to work on a NUCLEO-STM32F411RE using SPI2 ... with a NUCLEO-STM32F767ZI and the same code and configuration (apart from the baud rate, set to 1.6875 MHz) don't work anymore.

Have you used an oscilloscope and/or logic analyser to see what (if anything) is happening on the wires?

Have you tried a basic SPI example for the F7 board?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

TDK · ‎2025-05-19

The peripherals are different but the abstracted HAL_SPI_TransmitReceive call is the same for both. Show your code. Probably something else going on.

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RH38 · ‎2025-05-19

Thanks for the reply

first point: I have no instrument to see if the signals are correct or not. If the default persists I'll have to spy these signals with another card (I have several)

second point: I am currently studying the F7 example for SPI in polling mode, and I can't find any difference with what I (think I) do. I am going to try a basic communication between two cards for a start.

I keep on trying!

RH38 · ‎2025-05-19

Thanks for the reply

Yes, this is why I prefer using HAL functions; btw the same code runs on a G474RE board as well. As my project is rather complex, it is probably a good idea that I restart from scratch with just this SPI comm to eliminate side effects