DSP TMS320C5509A 控制DDS AD9854芯片进行PSK相位调制

接上一节https://blog.csdn.net/pxy198831/article/details/86738839DSP TMS320C5509A 控制DDS AD9854芯片驱动

AD9854有相位寄存器，不设置的话输出的两位就按照0~360°连续变化，

PSK调制相位是越变的，以8PSK为例

每一种相位表示一个八进制的数据，每45°为一种情况

程序如下：

interrupt void dmaCh0Isr(void)
{
	
	int I_Q_result;
	int PSK8[16] = {1,3,2,6,7,5,4,0,0,4,5,7,6,2,3,1};
    int ATW;
	static int noise_flag = 0,i=0;
	unsigned char AM_H,AM_L;
	static int fase=0;


	



	//Read the DMA status register to clear it so new interrupts will be seen
	DMA_RGETH(hDMACH0,DMACSR);

	DMA_start(hDMACH0);							/* Begin Transfer */

	if (dds_flag == 1)
	{
//		I_Q_result = dstPing[0];			//直接出音频

		I_Q_result =  AGC_audio(dstPing[0]);
		fir((DATA *)&I_Q_result, (DATA *)B_BS,(DATA *)&I_Q_result, BS_dbuf,1,BL_BS);
//		audio_DDS[Index] += 32768;
		
//		I_Q_result = 2*A*((float)I_Q_result)/(1+A);
		if (I_Q_result > 0)
		{
			I_Q_result = ((float)I_Q_result)/8192*2048;
		} 
		if (I_Q_result < 0)
		{
			I_Q_result = ((float)I_Q_result)/8192*2048;
		}
		

	//	dc = 2048;
	//	dc = ((1-A)*0x3fff)/(1+A);
	//	ac = (2*A*I_Q_result)/(1+A);
		ATW = (2*A*I_Q_result)/(1+A) + 2048;
		
	//	temp = ATW;
	//	ATW = (temp/65536)*4096;
		AM_H = (ATW&0x0f00)>>8; 
		AM_L = ATW&0xff;
		audio_DDS[Index] = (AM_H<<8)|AM_L;
		if(Index>=200)
		{
			Index = 0;
		}
		if (audio_DDS[Index++] > 1000)
		{
			if (noise_flag<200)
			{
				noise_flag++;
			}			
		}
		else
		{
			noise_flag = 0;
		}
		if (noise_flag != 200)
		{
//			AD9854_WR_Byte(OSK_I1_ADDRESS,AM_H);	  //设置I通道幅度
//			AD9854_WR_Byte(OSK_I2_ADDRESS,AM_L);
		}
		else
		{
//			AD9854_WR_Byte(OSK_I1_ADDRESS,0xff);	  //设置I通道幅度
//			AD9854_WR_Byte(OSK_I2_ADDRESS,0xff);
		}
//		ad9854_update(); 
//		rear++;
		if(i++==0)
		{
		AD9854_WR_Byte(0,0x00);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x00);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		if(PSK8[i-1]==0)
		{
			fase+=0x08;
		}
		else if(PSK8[i-1]==1)
		{
			fase+=0x10;
		}
		else if(PSK8[i-1]==2)
		{
			fase+=0x20;
		}
		else if(PSK8[i-1]==3)
		{
			fase+=0x18;
		}
		else if(PSK8[i-1]==4)
		{
			fase+=0;
		}
		else if(PSK8[i-1]==5)
		{
			fase+=0x38;
		}
		else if(PSK8[i-1]==6)
		{
			fase+=0x28;
		}
		else if(PSK8[i-1]==7)
		{
			fase+=0x30;
		}
		fase=fase%0x40;
		AD9854_WR_Byte(0,fase);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,fase);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		if(i==16)
		{
			i=1;
		}
/*     	if(PSK8[i]==0)
		{
		AD9854_WR_Byte(0,0x08);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x08);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		else if(PSK8[i]==1)
		{
		AD9854_WR_Byte(0,0x10);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x10);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		else if(PSK8[i]==2)
		{
		AD9854_WR_Byte(0,0x20);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x20);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		else if(PSK8[i]==3)
		{
		AD9854_WR_Byte(0,0x18);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x18);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		else if(PSK8[i]==4)
		{
		AD9854_WR_Byte(0,0x00);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x00);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		else if(PSK8[i]==5)
		{
		AD9854_WR_Byte(0,0x38);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x38);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		else if(PSK8[i]==6)
		{
		AD9854_WR_Byte(0,0x28);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x28);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		else if(PSK8[i]==7)
		{
		AD9854_WR_Byte(0,0x30);	  //设置
		AD9854_WR_Byte(1,0x00);
		AD9854_WR_Byte(2,0x30);	  //设置
		AD9854_WR_Byte(3,0x00);
   		ad9854_update();
		}
		i++;
		if(i==7)
		{
			i=0;
		} */
	
	}
}