spicommunication.h

基于FPGA 的直接数字频率合成信号发生器(DDS)设计

//使用AT90S8535的硬件SPI, 工作在主模式 ,SPI接口的初始化在主程序文件中作，
#ifndef SPICommu_H_MACRO
#define SPICommu_H_MACRO

#include "AT51S_89C52.h"

#ifdef IN_SPICommu
#define SPICommu_EXT
//-------------------------------------------------------------------------------

#else   //IN_SPICommu
#define SPICommu_EXT extern
//-------------------------------------------------------------------------------

#endif  //IN_SPICommu

//-------------------------------------------------------------------------------
#define SPI_SS  P2_2
SPICommu_EXT void initAD9875(unsigned long writedata);
SPICommu_EXT void testAD9875(unsigned long writedata);
SPICommu_EXT unsigned char daoUChar(unsigned char uc);

//-------------------------------------------------------------------------------

#endif  //SPICommu_H_MACRO