spi_def.h

spi协议的驱动程序源代码

//-----------------------------------------------------------------------------
// SPI_defs.h
//-----------------------------------------------------------------------------
// Copyright 2001 Cygnal Integrated Products, Inc.
//
// AUTH: BD
// DATE: 7 DEC 01
//
// This file defines the pins used for the SPI device.
// The SPI device is mapped to pins P0.0 - P0.3, but can be modified to map to
// any of the available GPIO pins on the device.
//
#ifndef SPI_DEFS
#define SPI_DEFS
sbit MOSI = P0^0; // Master Out / Slave In (output)
sbit MISO = P0^1; // Master In / Slave Out (input)
sbit SCK = P0^2; // Serial Clock (output)
sbit NSS = P0^3; // Slave Select (output to chip select)
#endif