There is an error in the HAL_I2C_MspInit() function generated by CubeMX.

[JChoi.6]

I2C did not work, so I was looking for the cause, and found that there was a missing part in the HAL_I2C_MspInit() function of the stm32f1xx_hal_msp.c file automatically generated by CubeMX, unlike the previous version.

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;

If I insert the above code, it works normally.

Below is the version information.

CubeMX V6.3.0

MCU Package STM32F1 Series V1.8.4

MCU STM32F103C6Tx

[Mike_ST]

Hello,

could you please share the .ioc file ?

[JChoi.6]

Hello?

This is the file you requested.

[Mike_ST]

Thank you,

Ticket entered.

Internal ticket number: 116845 (PS: This is an internal tracking number and is not accessible or usable by customers)

[Pavel A.]

Is it required to specify the speed of alternate function pins for modern STM32s too, or only for F1?