Is there a known issue with I2C2 on the STM32F301C8T6TR using PF0 (SDA) and PF1 (SCL), the I2C1 on PB8 and PB9 is working fine. It looks like the SDA is floating regardless the 3K3 pullup, the driver is returning with a Arbitration lost.
On the oscilloscope is the clock OK HI LO but the data is not, looks like some kind of conflict. I have results that differ one where data just stay HI and the driver is terminating with arbitration lost, another where the level is low enough to be accepted as a low start flag but when the first data bit (1) is set the process is terminated, another test I have 3 clock before the data is wrong and the driver is terminating with arbitration lost, the data is in no way looking correct in any of my tests. The last test is on a test board where I can test the I2C1 that work correct using the same code but I2C2 is not, using 3k3 pullup in this test.
Yes I have, 1 the PCB made for the project and 2 a test board where only the I2Cx are tested, Have tried with different size pullup and that might make the different results because the SDA is moving around in the not defined zone between Hi and Lo.
Yes the RCC register is checked and both the HSE and the LSE are both internal. The GPIOF and the I2C2 registers have been checked. I am using the CubeIDE to setup the environment there could be an issue there but I didn't find anything examine the registers.
