基于DSP的正弦波.上斜波,下斜波,梯形波,方波等波形函数发生器源程序

要求可以使用拨码开关控制波形的输出，其对照如下：#include "DSP281x_Device.h" // DSP281x Headerfile Include File #include "DSP281x_Examples.h" // DSP281x Examples Include File #include "f2812a.h"#define DIPS (*(unsigned int *)0xc0001)// Prototype statements for functions found within this file.// interrupt void ISRTimer2(void);void dac_loop(void);typedef unsigned char uint8; /*开始*/typedef unsigned int uint16;typedef unsigned long uint32;uint8 const code ZXB_code[256]={0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf4,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,0xe8,0xe6,0xe4,0xe3,0xe1,0xde,0xdc,0xda,0xd8,0xd6,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x92,0x8f,0x8c,0x89,0x86,0x83,0x80,0x7d,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x64,0x61,0x5e,0x5b,0x58,0x55,0x52,0x4f,0x4c,0x49,0x46,0x43,0x41,0x3e,0x3b,0x39,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x14,0x12,0x10,0xf,0xd,0xc,0xb,0x9,0x8,0x7,0x6,0x5,0x4,0x3,0x3,0x2,0x1,0x1,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x1,0x1,0x2,0x3,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xc,0xd,0xe,0x10,0x12,0x13,0x15,0x17,0x18,0x1a,0x1c,0x1e,0x20,0x23,0x25,0x27,0x29,0x2c,0x2e,0x30,0x33,0x35,0x38,0x3b,0x3d,0x40,0x43,0x46,0x48,0x4b,0x4e,0x51,0x54,0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x73,0x76,0x79,0x7c};/*结束*/void main(void){InitSysCtrl();dac_loop();}void dac_loop(void){int i,j,m,k;i=0;//m=DIPS&0x0f;for(;;){ m=DIPS&0x0f;if(m==0) //拨码开关值为0，显示上斜波形for(i=0;i<=0xfff;i+=0x10){DA_DA TA_L=i&0xff; //第一通道数据输出量低8位DA_DA TA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}if(m==1) //拨码开关值为1，显示下斜波形for(i=0;i<=0xfff;i-=0x10){DA_DATA_L=i&0xff; //第一通道数据输出量低8位DA_DATA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}if(m==2) //拨码开关值为2，显示三角波形{for(i=0;i<=0xfff;i+=0x10){DA_DATA_L=i&0xff; //第一通道数据输出量低8位DA_DATA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}for(k=0xfff;k>=0;k-=0x10){DA_DA TA_L=k&0xff; //第一通道数据输出量低8位DA_DA TA_H=((k>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}}if(m==3) //拨码开关值为3，显示梯形波{for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=i&0xff; //第一通道数据输出量低8位DA_DATA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=0xff; //第一通道数据输出量低8位DA_DATA_H=0x0f|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}for(i=0xfff;i>=0;i-=0x50){DA_DA TA_L=i&0xff; //第一通道数据输出量低8位DA_DA TA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}for(i=0xfff;i>=0;i-=0x50){DA_DA TA_L=0; //第一通道数据输出量低8位DA_DA TA_H=0|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x10;j++);}}if(m==4) //拨码开关值为4，显示方波{for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=0xff; //第一通道数据输出量低8位DA_DATA_H=0xf|DA_CHN1;//第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x15;j++); //更改频率}for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=0; //第一通道数据输出量低8位DA_DATA_H=0|DA_CHN1; //第一通道da数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x15;j++); //更改频率}}////////if(m==5) //拨码开关值为5，显示更改频率后的上斜波形for(i=0;i<=0xfff;i+=0x10){DA_DA TA_L=i&0xff; //第一通道数据输出量低8位DA_DA TA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}if(m==6) //拨码开关值为6，显示更改频率后的下斜波形for(i=0;i<=0xfff;i-=0x10){DA_DATA_L=i&0xff; //第一通道数据输出量低8位DA_DATA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x15;j++); //更改频率}if(m==7) //拨码开关值为7，显示更改频率后的三角波形{for(i=0;i<=0xfff;i+=0x10){DA_DATA_L=i&0xff; //第一通道数据输出量低8位DA_DATA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}for(k=0xfff;k>=0;k-=0x10){DA_DA TA_L=k&0xff; //第一通道数据输出量低8位DA_DA TA_H=((k>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}}if(m==8) //拨码开关值为8，显示更改频率后的梯形波形{for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=i&0xff; //第一通道数据输出量低8位DA_DATA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=0xff; //第一通道数据输出量低8位DA_DATA_H=0x0f|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}for(i=0xfff;i>=0;i-=0x50){DA_DA TA_L=i&0xff; //第一通道数据输出量低8位DA_DA TA_H=((i>>8)&0x0f)|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}for(i=0xfff;i>=0;i-=0x50){DA_DA TA_L=0; //第一通道数据输出量低8位DA_DA TA_H=0|DA_CHN1; //第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++) ;//更改频率}}if(m==9) //拨码开关值为9，显示更改频率后的方波{for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=0xff; //第一通道数据输出量低8位DA_DATA_H=0xf|DA_CHN1;//第一通道数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}for(i=0;i<=0xfff;i+=0x50){DA_DATA_L=0; //第一通道数据输出量低8位DA_DATA_H=0|DA_CHN1; //第一通道da数据输出量高8位和通道号1DA_CTL=0;for(j=0;j<0x31;j++); //更改频率}}if(m==10) //拨码开关值为10，显示更改频率后的正弦波{uint16 data x;while(1){for(x=0;x<256;x++){DA_DA TA_L =ZXB_code[x]&0xff;DA_DA TA_H=(( ZXB_code[x]>>8)&0x0f)|DA_CHN1;DA_CTL=0;}}}}}。