About MDao.1

MDao.1 · 2020-11-09

Hello,I cannot use the I2C bus pins to do I2C. That is, I can't use I2C1 or I2C2 or any of the alternate pins. I need to use PB5 as SDA and PB4 as SCK. I haven't found a way to do this in cubeMX, so I am wondering if I can bit-bang I2C on those pins....

MDao.1 · 2020-11-05

Hello,I would like to implement an I2C master on an STM32F103. It's pretty straightforward to select the IO's using cubeMX and to generate the code, but I don't want to use either of the available pins for I2C (PB7,PB6 or PB9,PB8). I need to use PB5 ...

MDao.1 · 2020-12-15

Hello @Grant Bt Are you referring to the repo I shared in my previous post?

MDao.1 · 2020-12-02

Thanks for the resources. I am still working on it, but I wrote a C library to bitbang I2C for STM32's. Hopefully, it's helpful to someone in the future. https://github.com/PascalPolygon/stm32_bitbang_i2cRegards,Mawaba.

MDao.1 · 2020-11-09

@Peter BENSCH Thanks! what is I2C_DR in that document (page 16) ? and how are I2C_SDA_PIN and I2C_SCL_PIN defined? As in what GPIO pins are used?Regards,Mawaba.

MDao.1 · 2020-11-09

Hello @Peter BENSCH ,Could I use those pins if I bit-banged I2C? If so are there any examples of i2c bitbanging for this chip?Regards,Mawaba.

MDao.1 · 2020-11-05

Hello @Peter BENSCH , Thanks for the reply. I have a board here that is doing I2C on the same chip using PB5 & PB4. I do not have the source code and so I am trying to figure out how this could have been done. Regards,Mawaba.

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I2C Bit-Banging on STM32F103

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