STM32F4 Discovery LED7

MDaya.2 · ‎2023-09-05

Hello everyone, I use stm32f4 discovery. I want to communication of mpu6050 sensor with I2C. When I push to run button Led 7 is burning. Why is that. ? Give me comment .Thankss

Foued_KH · ‎2023-09-05

Hello @MDaya.2 ,

Make sure that you are using the correct static address , respect the max frequency for I2C communication , ..

Try to debug and set breakpoints .
I suggest you use an oscilloscope to check SDA and SCL behavior.

Could you please provide more details about your project ?

Foued

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Foued_KH · ‎2023-09-05

Hello @MDaya.2 ,

Make sure that you are using the correct static address , respect the max frequency for I2C communication , ..

Try to debug and set breakpoints .
I suggest you use an oscilloscope to check SDA and SCL behavior.

Could you please provide more details about your project ?

Foued

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Peter BENSCH · ‎2023-09-05

@MDaya.2 you also asked why LD7 is lit, but this is also mentioned in UM1472, section 6.3:

USB LD7: green LED indicates when VBUS is present on CN5 and is connected to PA9 of the STM32F407VGT6.

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.