aic23.c

dsp 2812的例子代码,有对各种外设的操作

#include	"DSP28_Device.h"


extern	Uint16	  volume;
extern	Uint16	AicRegs;


void 	InitAic23()
		{ 
   			WriteAic23(RESET,0);
   			WriteAic23(D_INTERFACE_ACT,0x001);
   			WriteAic23(POWER_CON,0);
   			WriteAic23(SAMPLE_RATE,0x022);  //44.1k
//   		write_AIC23(SAMPLE_RATE,0x062);  //22.05k
//   		write_AIC23(SAMPLE_RATE,0x02e);    //8.021k
    
   			WriteAic23(L_LINE_VOLUME,0x0117);
   			WriteAic23(R_LINE_VOLUME,0x0117);
   
   			volume=100;
   			WriteAic23(L_HEADPHONE_VOLUME,0x0180+volume);   
   			WriteAic23(R_HEADPHONE_VOLUME,0x0180+volume);   
   
//   		write_AIC23(A_AUDIO_PATH,0x009);  //bypass DAC OFF
//   		write_AIC23(A_AUDIO_PATH,0x014);   //MIC ADC DAC ON  0DB
//     		write_AIC23(A_AUDIO_PATH,0x1fc);   //bypass MIC ADC DAC ON 0DB sidetone 
     		WriteAic23(A_AUDIO_PATH,0x07d);   //bypass MIC ADC DAC ON 20DB sidetone(-6db)
//   		write_AIC23(A_AUDIO_PATH,0x011);   //LINE ADC DAC ON
   
   			WriteAic23(D_AUDIO_PATH,0x04);
   
   			WriteAic23(D_AUDIO_INTERFACE,0x043);   //master  dsp mode  16BIT
		}
		
void 	WriteAic23(Uint16  addr,Uint16  dat)
		{
    		Uint16	i,Temp;
			Temp = addr<<9;
			dat = dat | Temp;
    		//CS=0;
    		AicRegs = AicRegs & ClrAICCS;
    		Led8Reg = AicRegs;
    		for(i=0;i<16;i++)
    			{
      				//SCLK=0;      				
		    		AicRegs = AicRegs & ClrSCLK;
      				Led8Reg = AicRegs;
     				Temp = dat<<i;
      				Temp = Temp & 0x8000;	
					if (Temp)
						{
							AicRegs = AicRegs | SetSIDIN;
							Led8Reg = AicRegs;
						}		
      				else{
      						AicRegs = AicRegs & ClrSIDIN; 
      					    Led8Reg = AicRegs;	
      					}          					     
      				delay(200);
      				AicRegs = AicRegs | SetSCLK;   //SCLK=1;
      				Led8Reg = AicRegs;
      				delay(200);
      			}
    		//SCLK=0;
    		AicRegs = AicRegs & ClrSCLK;
    		Led8Reg = AicRegs;
    		//CS=1;
    		AicRegs = AicRegs | SetAICCS;
    		Led8Reg = AicRegs;
}

void delay(Uint32 k)
{
   while(k--);
}