Hi,
I am working on tv board which has a i2c controller connected to a eeprom slave. we are trying to check the i2c controller behavior,when SCL and SDA line are shorted using any metal device.
The behavior i observed is that i am getting a busy status even when both signal are high.Because of this unable to do another transaction. But above thing can be recovered using soft reset.
The busy signal even arises during transactions with slave, so the software is not able to predict the controller behaviour during shorting.
Is there anyway we can determine the shorting of SCL and SDA line ?
Regards, Eilu
.... a i2c controller A i2c controller can be anything
Erik
Yes Erik, it is a proprietary controller. The controller is not designed to handle the problem of shorting the SCL and SDA.
As far as i heard it is a standard test conducted for I2C from years.
Is there any way i can do a transaction without disturbing the lines by shorting it ?
It would be really helpful to me if u can suggest some mechanism for handling the SCL and SDA short.
Thanks Eilu
Is it really?
As far as i heard it is a standard test conducted for I2C from years. with dozens of I²C projects done, I have never heard of it. if the I²C fails, it fails and the failure mode is irrelevant.
PS this sounds like you are planning to do I²C over some distance, is that the case?
Well, any I2C test should introduce communication errors on the I2C data to verify that the firmware can reinitialize and get the connected devices to resynchronize again. It is, alas, quite common that "commercial" software fails something as simple as this.
Having one unit, it may run for 10 years without any issues. Having 10k units out, a couple of them will for some reason do get an extra clock pulse or similar - the state error should automatically recover without a need for a full reset of the hardware.
Well, any I2C test should introduce communication errors on the I2C data to verify that the firmware can reinitialize and get the connected devices to resynchronize again.
agreed and (s)he has that
"[BUSY stays on] when SCL and SDA line are shorted .... But above thing can be recovered using soft reset."