Basic Information: Printer Model: monoprice select mini V3 MCU / Printerboard: M200 Host / SBC: Raspberry 3 klippy.log klippy(15).log (701.8 KB) Fill out above information and in all cases attach your klippy.log file (use zip to compress it, if too big). Pasting your printer.cfg is not need…

As far as I can tell, there are no alt i2c functions for those pins: [image] https://www.st.com/resource/en/datasheet/stm32f072c8.pdf From the log file, it seems that you have a lot of random I2C errors, but it is either a timeout or a START NACK (so the address byte is not acknowledged). If yo…

Hi , please ignore th NACK messages. These came from a wrong wiring. I swaped 2 pins. After that the communication seem s ok. From ST documentation i can confirn the STM32F070C6/F6 has an alternative ic2 configuration on PA9/10 [grafik]

[image] mistergefahrensucher: stm32F072C6 I2C. [image] mistergefahrensucher: STM32F070C6 Np, you are correct F070 does have one: https://www.st.com/resource/en/datasheet/stm32f070c6.pdf You can give it a try: stm32: f070 add PA9/PA10 i2c bus line by nefelim4ag · Pull Request #7039 · K…

Sorry, can’t get it working. Klipper reports: SHUTDOWN MCU 'mcu' shutdown: I2C Timeout Once the underlying issue is corrected, use the "FIRMWARE_RESTART" command to reset the firmware, reload the config, and restart the host software. Printer is shutdown klippy(11).log (234.5 KB)

Hmmm, are you sure you have the STM32F070C6? [image] Error after Klipper firmware 0.13 update my MCU is a STM32F070CBT6 So, probably there is no such function on your MCU. [image] [image] [image]

Thanks, you are right, it’s an STM32F070CBT6. I meesed up the type. So no i2c on PA9/PA10, that’s bad. Now i have to life with software i2c. But maybe someone other can use your change. But again, great job. Cheers Rüdiger

Need additonal i2c config in stm32f0_i2c.c

General Discussion

nefelim4ag September 8, 2025, 5:48pm 6

Hmmm, are you sure you have the STM32F070C6?

So, probably there is no such function on your MCU.

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Need additonal i2c config in stm32f0_i2c.c

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