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Linduino
1.3.0
Linear Technology Arduino-Compatible Demonstration Board
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LT_SPI: Routines to communicate with ATmega328P's hardware SPI port. More...
Files | |
file | LT_SPI.cpp |
Library for LT_SPI: Routines to communicate with ATmega328P's hardware SPI port. | |
file | LT_SPI.h |
LT_SPI: Routines to communicate with ATmega328P's hardware SPI port. | |
LT_SPI: Routines to communicate with ATmega328P's hardware SPI port.
LT_SPI implements the low level master SPI bus routines using the hardware SPI port. SPI Frequency = (CPU Clock frequency)/(16+2(TWBR)*Prescaler) SPCR = SPI Control Register (SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0) SPSR = SPI Status Register (SPIF WCOL - - - - - SPI2X) Data Modes: CPOL CPHA Leading Edge Trailing Edge 0 0 sample rising setup falling 0 1 setup rising sample falling 1 0 sample falling setup rising 1 1 sample rising setup rising CPU Frequency = 16MHz on Arduino Uno SCK Frequency SPI2X SPR1 SPR0 Frequency Uno_Frequency 0 0 0 fosc/4 4 MHz 0 0 1 fosc/16 1 MHz 0 1 0 fosc/64 250 kHz 0 1 1 fosc/128 125 kHz 0 0 0 fosc/2 8 MHz 0 0 1 fosc/8 2 MHz 0 1 0 fosc/32 500 kHz
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