Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board
LT_SPI: Routines to communicate with ATmega328P's hardware SPI port.

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.
 

Detailed Description

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

Copyright 2018(c) Analog Devices, Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.