senddsp.c

来自「单片机C源程序souce」· C语言 代码 · 共 32 行

#include <SST89V564.H>
#include <ABSACC.H>
#include "ext_temp.h"

extern wdt(void);

extern senddsp(void)
{
unsigned char i,ptr;
wdt();
//write the HPIA(the write address)
//The higher 8bit of address.
XBYTE[0xe4ff]=0x78;//HR/W=0;HCNT1=1;HCNT0=0;HBIL=0.
//The lower 8bit of the address.
XBYTE[0xe5ff]=0xff;//HR/W=0;HCNT1=1;HCNT0=0;HBIL=1.

ptr=0x00;		//Reset the counter for rdata[20].
for (i=0;i<RXLen;i++)	//Begin writing data to DSP.
  {
  XBYTE[0xe2ff]=0x00;//HR/W=0;HCNT1=0;HCNT0=1;HBIL=0.The higher 8-bit.
  XBYTE[0xe3ff]=rdata[ptr++];//HR/W=0;HCNT1=0;HCNT0=1;HBIL=1.The higher 8-bit.
  }
XBYTE[0xe2ff]=0x00;
XBYTE[0xe3ff]=0x00;
   			//Write the HPIC(the controll register) and give an interrupt to DSP.
//HPIC=0x06.
XBYTE[0xe0ff]=0x06;//HR/W=0;HCNT1=0;HCNT0=0;HBIL=0.
XBYTE[0xe1ff]=0x06;//HR/W=0;HCNT1=0;HCNT0=0;HBIL=1.

ptr=0x00;		//Reset the counter.
}