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Linduino
1.3.0
Linear Technology Arduino-Compatible Demonstration Board
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LT_I2C: Routines to communicate with ATmega328P's hardware I2C port. More...
Files | |
file | LT_I2C.cpp |
Library for LT_I2C: Routines to Communicate With ATmega328P's hardware I2C port. | |
file | LT_I2C.h |
LT_I2C: Routines to communicate with ATmega328P's hardware I2C port. | |
file | LT_I2C_Wire.h |
LT_I2C: Routines to communicate with ATmega328P's hardware I2C port. | |
LT_I2C: Routines to communicate with ATmega328P's hardware I2C port.
LT_I2C contains the low level routines to communicate with devices using the ATMega328's onboard hardware I2C port. Each routine checks the Two Wire Status Register (TWSR) at the end of the transaction and returns 0 if successful and 1 if not successful. I2C Frequency = (CPU Clock frequency)/(16+2(TWBR)*Prescaler) TWBR-Two Wire Bit Rate Register TWCR=Two Wire Control Register (TWINT TWEA TWSTA TWSTO TWWC TWEN - TWIE) TWSR=Two Wire Status Register Prescaler Values: TWSR1 TWSR0 Prescaler 0 0 1 0 1 4 1 0 16 1 1 64 Examples: CPU Frequency = 16Mhz on Arduino Uno I2C Frequency Prescaler TWSR1 TWSR0 TWBR 1khz 64 1 1 125 10khz 64 1 1 12 50khz 16 1 0 10 100khz 4 0 1 18 400khz 1 0 0 12
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