What Causes the I2C Bus Lock and How Do I Fix It So I Can Program a Device?

▤ Summary

I am trying to use Aardvark I2C/SPI Host Adapter and the Flash Center Software to program an I2C device, but it keeps failing because the bus is locked as shown below. This wait time occurs when the SCL (serial clock) line of the bus being held low. When excessive timeout is observed, the Aardvark adapter resets its own I2C interface – no further action occurs on the bus including programming a device. This tool can be used to run batch scripts for testing and save the transactions in a CSV file for analyzing the data. Additional resources that you may find helpful include the following: If you have other questions about our host adapters or other Total Phase products, feel free to email us at sales@totalphase.com.

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