Hi there,I drove 4 SHT4x by STM32G473VE and used the HAL_I2C_Master_Transmit() and HAL_I2C_Master_Receive() to write and read the sensors.Normally, everything is well.However, if Iunplug the sensor;replug the sensor again;(Not the sensor maybe can NOT work normally)reset the MCU;the program will probably run into the following dead loop:I don't know why this happened, and how I can recover from this error state.Thank you!

Graduate II

Question

Is this a HAL IIC bug?

Hi there,

I drove 4 SHT4x by STM32G473VE and used the HAL_I2C_Master_Transmit() and HAL_I2C_Master_Receive() to write and read the sensors.

Normally, everything is well.

However, if I

the program will probably run into the following dead loop:

I don't know why this happened, and how I can recover from this error state.

Thank you!

This topic has been closed for replies.

Technical Moderator

Have you tried checking the device with the HAL_I2C_IsDeviceReady() API after unplugging and replugging it?

Could you provide the data transmission trace using the logic analyzer?

Super User

Previous discussion on recovering from problems on the I2C bus: