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pass3master · 2024-12-26

We are developing a device using the STM32H743.We are setting up the GPIO during initialization, but I am wondering about something.What is the GPIO output before initialization? Is it high impedance?Or does it change depending on the circuit connect...

pass3master · 2024-12-24

We are developing software that uses GPIO interrupts.We would like to test if the GPIO interrupt handler is working properly, but is it possible to set the pin assigned to the GPIO interrupt High/Low in software?Is this only possible by inputting a s...

pass3master · 2024-12-23

We are using HAL_SPI_TransmitReceive to transmit and receive SPI data.We would like to cancel HAL_SPI_TransmitReceive midway through. Is this possible? Also, how should We write it?

pass3master · 2024-12-23

We are performing SPI communication using DMA.In this case, we manually set the GPIO to High/Low as SPI_CS, but (obviously) SPI_CS goes High before all of the SPI CLK is sent.How can we manually return SPI_CS to its original state after all of the SP...

pass3master · 2024-12-23

We are trying to do SPI communication in the GPIO interrupt handler.We are not sure about the following two points. Can someone please give me an answer?1, If another GPIO interrupt occurs while the GPIO interrupt handler is running (with the same pr...

pass3master · 2024-12-26

Thank you for your answer. I see, analog input!Is it floating as an electric potential?

pass3master · 2024-12-23

Thank you for your answer.I see, that's right.Is this the same idea when using HAL_SPI_TransmitReceive_IT, which is not blocking?

pass3master · 2024-12-23

Thank you for your reply. I was able to solve it thanks to you.

pass3master · 2024-12-23

By interrupt, do you mean a DMA interrupt?The DMA1 stream2 global interrupt (the DMA stream we are using) is enabled.The target SPI global interrupt is disabled.

pass3master · 2024-12-23

I see, that's how it works.Thanks to you I understand it now.Thank you.

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The GPIO output before initialization

How to test GPIO interrupt handlers

How to cancel HAL_SPI_TransmitReceive

Regarding SPI communication using DMA and manual SPI_CS operation

Relationship between GPIO Interrupt and SPI Communication

Re: The GPIO output before initialization

Re: How to cancel HAL_SPI_TransmitReceive

Re: Regarding SPI communication using DMA and manual SPI_CS operation

Re: Regarding SPI communication using DMA and manual SPI_CS operation

Re: Relationship between GPIO Interrupt and SPI Communication