Hi All
I use i2c bus to drive two segment leds and one eeprom. I use tms570ls1227. I find that i2c(SDA and SCL) pin direction has no effect on the communication. I set both of them as output. It works perfectly then I set them as input, it can work as well.
So I am wondering what the i2c pin direction settings exactly used for?
My mcu is master all the time, so it will generate the clock all the time, I can understand scl pin should be output. But I have to be switch between receriver and transmitter, should the sda pin direction change with it? I never manually change the direction of sda pin in my code. But is works. Can someone explain this for me？
RegardsLeo
