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1

DA_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1

DA_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1

DA_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1

DA_CTL=0;

for(j=0;j<0x10;j++);