stemwin i2c problem

nohabviktor · ‎2015-07-03

Posted on July 03, 2015 at 10:05

I download the STM32CubeF1 package and compiled the stemwin hello world demo. It is works fine, everything is ok, but I turn on the i2c1 with HAL driver and connect to LM75 temperature sensor. If I put the i2c1 init and temp read after the gui init, its not working. I2c1 is stopped, and exit with timeout everytime. If I put the i2c1 init and temp read before the gui init, its work fine, the result is ok, but If I put the temp read after the gui init, is not working. The i2c2 is working everytime and everywhere.

My hardware is ok, i2c1 is working without stemwin everytime.

I was unable to find anything useful by googling. Thanks in advance for any help and sorry for my english

#stemwin-cube

Amel NASRI · ‎2015-07-06

Posted on July 06, 2015 at 11:56

Hello nohabviktor,

What are the flags set for I2C1 in case of issue?

''The i2c2 is working everytime and everywhere.'': do you mean that you made the test for I2C2 and it is OK?

Check the errata-sheet of you device: may be there is a conflict between I2C1 pins and some other used peripherals.

-Mayla-

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