About ABabe.1

ABabe.1 · 2021-09-25

stm32f103cbt6, i2c1 in slave receiver mode. CubeIDE, stm32f1 pack ver 1.8.4. I use HAL_I2C_Slave_Receive_IT to receive 1(adr)+2 bytes. I2C standard mode. Both err and evt interrupts enabled. I2C stucks into bus error (BERR flag). Jumping over HAL co...

ABabe.1 · 2021-09-27

That sequence anyway should not lead to BERR in this case. Actualy i found out what is going on. The logic that drives BERR flag in uC is really sensitive to SDA to SCL hold time which can be 0 as per specification. In my case I can't exactly say wet...

ABabe.1 · 2021-09-27

ABabe.1 · 2021-09-27

ABabe.1 · 2021-09-27

Here are the pictures from osciloscope and logical analyzer (same sequence). Here is the condition but STOPF didn't occured. Last byte in the sequence is not acknowledged for some reasons. Can't see the explanation of getting into BERR.

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stm32f103cbt6, i2c1 in slave receiver mode. BERR flag incorrect behavior.

Re: stm32f103cbt6, i2c1 in slave receiver mode. BERR flag incorrect behavior.

Re: stm32f103cbt6, i2c1 in slave receiver mode. BERR flag incorrect behavior.

Re: stm32f103cbt6, i2c1 in slave receiver mode. BERR flag incorrect behavior.

Re: stm32f103cbt6, i2c1 in slave receiver mode. BERR flag incorrect behavior.