Posted on January 26, 2015 at 18:27 Yes, auto mode solve the problem  Thank you,

Posted on January 25, 2015 at 10:49I do not rename sources to .cpp. Some of them (HAL and CMSIS files) are .c, my sources are .cpp.In general, it is strange that it does not work I2C. Other HAL features - Timers, GPIO, NVIC, ADC work properly. Even ...

Posted on January 25, 2015 at 10:43HAL 1.0.0 for stm32l1xx already have extern ''C''. I just  change in the IAR project options Language: C to C ++. 

Posted on January 25, 2015 at 09:57Of course I know that. The cause of the problem was that I2C stops working if you use C ++ compiler (IAR 7.3).After sending the slave address and receiving ACK, the controller pulls SCL to ground - and said that BU...