How to setup hfmpi2c1 using STM32F446

Lding2025 · ‎2025-09-17

I have enable the hfmpi2c1 in STM32CubeMX tools, but I can find the

FMPI2C_HandleTypeDef is undefined in the source code.

Do we have a demo code to show how to setup and use hfmpi2c1.

It's very confuse that the F446 only have one Fast Plus Mode IIC interface.

mƎALLEm · ‎2025-09-18

Hello and welcome to the ST community,

I didn't really understood the issue.

I just generated a code with the latest CubeMx version 6.15.0 with I2C in Fast mode + and FMPI2C_HandleTypeDef is defined.

In the main, this is what I get:

/* Private variables ---------------------------------------------------------*/
FMPI2C_HandleTypeDef hfmpi2c1;

If I compile the project I don't have any error.

This is my configuration:

For your last question, I didn't really understand the meaning! Do you mean the number of instances available on that device? if yes, this information is available in the datasheet:

4xI2C instances are available on that device, only I2C1 features Fast mode/+.

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