- Trace On - save all program steps to a text file with the filename based on the current date. the digital pins state is also saved for the Logic Analyzer
- Serial.Write - trace into all the output bits of each serial.write instruction and add time to the millis function depending on the baud rate
- SPI.txfer - trace into the output bits of each 8 bit transfer and add 24us for each transfer (3us for each bit)
- Wire.send - trace the output bits of each I2C output byte
The middle three options are specially designed for the Tool > Logic Analyzer and allow the digitalPin changes to be view in real time similar to the way an oscilloscope would display the voltage levels. When Trace On is selected or deselected, the lower 3 options are also selected or deselected.