attiny usi twi i2c simple examples and pcf8574 gpio expander. USI used by attiny84, attiny85, attiny2313 and other atmel chips.
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Updated
Jul 23, 2023 - C
attiny usi twi i2c simple examples and pcf8574 gpio expander. USI used by attiny84, attiny85, attiny2313 and other atmel chips.
ATtiny85/45/25 I2C bootloader
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