speaker.c

DM642HPI的使用

#include "2407c.h"                    

#define HPICL (*((unsigned char*)(0xe000)))
#define HPICH (*((unsigned char*)(0xe001)))
#define HPIAL (*((unsigned char*)(0xe002)))
#define HPIAH (*((unsigned char*)(0xe003)))
#define HPIDAL (*((unsigned char*)(0xe004)))
#define HPIDAH (*((unsigned char*)(0xe005)))
#define HPIDL (*((unsigned char*)(0xe006)))
#define HPIDH (*((unsigned char*)(0xe007)))

ioport unsigned int port8000;		//HPI Enable

main()
{
	int aa=0xd,bb=0x0;             
	long addr; 
	addr=0x90080010;                //CPLD定位在CE1空间高位地址外部扩展寄存器，可控制指示灯的亮灭
	
	*WDCR=0x6f;
	*WDKEY=0x5555;
	*WDKEY=0xaaaa;		/* 关闭看门狗 */
	*SCSR1=0x81fe;    	/* DSP运行频率40m */		
	port8000=0;
	
    for(;;)
    {
    HPICL=0x0001;
	HPICH=0x0001;
    while(!(HPICL&0x8));              
	HPIAL=addr;
	HPIAH=(addr>>16);
	while(!(HPICL&0x8));                                                                                                                                                                                                                                                                                                                               
    HPIDL=aa;                             
    HPIDH=bb;                      //完成向0x90080010地址写入数据，aa低16位,bb高16位
    while(!(HPICL&0x8));
    }
	while(1);
}