isp.c

来自「制作AVR下在线」· C语言 代码 · 共 23 行

/* 
  isp.c - part of USBasp 
 
  Autor..........: Thomas Fischl <[e-mail]>  
  Description....: Provides functions for communication/programming 
                   over ISP interface 
  Licence........: GNU GPL v2 (see Readme.txt) 
  Creation Date..: 2005-02-23 
  Last change....: 2007-07-23 
*/  
  
#include <AVR io.h>   
#include "isp.h"   
#include "clock.h"   
  
#define spiHWdisable() SPCR = 0   
  
void spiHWenable() {  
  
  /* enable SPI, master, 375kHz SCK */  
  SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR1);  
  SPSR = (1 << SPI2X);  
}