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STM32 and I2C port

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emreer3442

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Hello everyone who love microchips! Last year I use SMT32F446RET microchips. It kind a good chip for Rocket avionics PCB. I ran into many problems about I2C port. I thought using external pull-up resistor for more powerful logic is nice but i could not run my barometric sensor (BMP180-BMP280) on my PCB. After I rip off these pull-up resistors(connected to SDA-SCL pins, 4k7ohm), problem is solved why this happened I still not understand. If any one know what happened this stuff, please tell me I will be really appreciated. :)

Ekran görüntüsü 2021-10-19 223629.png
Ekran görüntüsü 2021-10-19 223550.png
 

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Hi,

We need a schematic, all the SCL and SDA routing, connected devices, speed, code...and maybe most of all a detailed error description.

Klaus
 

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