Hi, I like to control this cute STM8S103 uC with c-code without using any library. I created many succesfully projects but now I want to write a I2C driver. I configured the uC portpins PB4/PB5 being SCL/SDA as Psuedo Open Drain and as Ouput and the I2C peripheral clock by default is enabled at powerup and I connected a pullup resistor of 5K6 on both signals. When de I2C peripheral is enabled only the SDA signal goes high as the SCL signal stays low. I executed many experiments and one time both signals got high when enabeling the I2C peripheral. But now the SCL still keeps grounded. What can be wrong here?
