Releases · Richard-Gemmell/teensy4_i2c

Beta release of version 2.

glitch filters are now enabled in Slave mode making slave devices more
resistant to electrical noise
significantly adjusted signal timings so driver is compliant with
I2C Specification over the full range of allowed rise times
fixed bug which caused I2CMaster::finished() to return true before STOP
was sent to slave.
you can now enable or disable the internal pullup resistors with
set_internal_pullups() or setInternalPullups()
reduced pin drive strength which significantly reduced voltage
undershoot spikes on falling clock edges
tested port 2 (pins 24 & 25) on both Teensy 4.1 and Teensy 4.0
analysed and documented I2C timing
registers to find out what they really do (as opposed to what the datasheet claims!)
created a simulator
to predict the effect of changing I2C configuration registers
created dedicated circuit board to provide tunable pullups and a reliable setup
created automated tests to check I2C signal timings
created automated tests of I2CSlave behaviour

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