Hi I am using STM32F205RCT6 to try periodical wakeup from standby mode. I choose RTC_WakeUpClock_RTCCLK_Div16 and set wakup counter 0x9000, that is about 18 Seconds @32768hz LSE. In main function,first print wakeup counter and RTC_CR, then every 1 ...

Currently I try use STM32F103RCT to implement I2C slave to communicate with master. When master sent address with write bit , there is no any problem and all data can be transmitted to slave through I2C, but when master try to read, it seems big prob...