?? bootdsp.c
字號:
#include <SST89V564.H>
#include <ABSACC.H>
extern wdt(void);
extern BootDSP(void)
{
unsigned int i,ptr,ptr1;
unsigned char buffer;
wdt();
//write the HPIA(the write address)
XBYTE[0xe4ff] = 0x00; //The higher 8bit of address.
//HR/W=0;HCNT1=1;HCNT0=0;HBIL=0.
XBYTE[0xe5ff] = 0x7f; //The lower 8bit of the address.
//HR/W=0;HCNT1=1;HCNT0=0;HBIL=1.
//ptr = 0x2000;
ptr = 0x4000; //DSP的存儲地址改為0x4000
ptr1= ptr+1;
for (i=0x0000;i<0x4f80;i++) //Begin writing data to DSP.
{
buffer = CBYTE[ptr1]; //Higher 8bit data output.
XBYTE[0xe2ff] = buffer; //HR/W=0;HCNT1=0;HCNT0=1;HBIL=0.
ptr1=ptr1+2;
buffer = CBYTE[ptr]; //Lower 8bit data output.
XBYTE[0xe3ff] = buffer; //HR/W=0;HCNT1=0;HCNT0=1;HBIL=1.
ptr=ptr+2;
}
//write the HPIA(the write address)
XBYTE[0xe4ff] = 0x00; //The higher 8bit of address.
//HR/W=0;HCNT1=1;HCNT0=0;HBIL=0.
XBYTE[0xe5ff] = 0x7e; //The lower 8bit of the address.
//HR/W=0;HCNT1=1;HCNT0=0;HBIL=1.
XBYTE[0xe2ff] = 0x00; //Higher 8bit data output.
//HR/W=0;HCNT1=0;HCNT0=1;HBIL=0.
XBYTE[0xe3ff] = 0x80; //Lower 8bit data output.
//HR/W=0;HCNT1=0;HCNT0=1;HBIL=1.
}
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