Can anyone provide some reference or sample regarding i2c slave bitbang implementation in stm32

[Foued_KH]

Hello @JMP.1​ ,

You can refer to the I2C WIKI : Getting started with I2C - stm32mcu

Hope my answer helped you!

Foued

[S.Ma]

I tried, using Timer and EXTI. It barely works at 200kHz if there is no other interrupt in the STM32.

So my piece of advice: Keep away from trying this.

[JMP.1]

thanks for your reply, this post is helpful when iam doing this i2c with hardware module support. i need to implement software i2c for slave

[JMP.1]

Could you please share that code, i can just try atleast

[Foued_KH]

Hello @JMP.1​ ,

Please check this link . It will help you to implement software I2C for slave.

Foued

[S.Ma]

Well, you have been warned.. STM32F437 code extract. EXTI on both SDA and SCL, plus a slave state machine interrupt based to grasp the I2C bus bit events, and a spy which put in BV (SW fifo) all the I2C seen events as an ASCII String.