基于单片机的函数发生器 - 图文

#include\#include\#include\//#include \

sbit KEY1 = P3^2; sbit KEY2 = P3^3; sbit KEY3 = P3^4; sbit KEY4 = P3^5; sbit LED1 = P2^0; sbit LED2 = P2^1; sbit LED3 = P2^2; sbit LED4 = P2^3;

typedef unsigned char uint8; typedef unsigned int uint16; typedef unsigned long uint32; #define DAC0832_PORT XBYTE[0X70FF]

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, 0x15,0x14,0x12,0x10,0x0f,0x0d,0x0c,0x0b,0x09,0x08,0x07,0x06, 0x05,0x04,0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04, 0x05,0x06,0x07,0x08,0x09,0x0a,0x0c,0x0d,0x0e,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 };

void delayUser(uint16 User) {

while(User--); }

char Key_Press(char key) {

if(!KEY1){key += 1;while(!KEY1);} else{

if(!KEY2){key -= 1;while(!KEY2);} // else{

// if(!KEY3){key = 3;while(!KEY3);} // else{

// if(!KEY4){key = 4;while(!KEY4);} // else key = 0; // } // } }

if(key == 0)key = 4; if(key == 5) key = 1; return key; }

void main() {

uint16 data x;

uint8 data key = 1; P3 |= 0x3c; while(1) {

P2 &= 0xf0;

key = Key_Press(key);

if(key == 1){ //正弦 LED1 = 1;

for(x=0;x<256;x++){

DAC0832_PORT=ZXB_code[x]; _nop_(); } }

if(key == 2){ //三角 LED2 = 1;

for(x=0;x<256;x++){

DAC0832_PORT = x;

}

}

_nop_(); }

for(x=255;x>0;x--){

DAC0832_PORT = x; _nop_(); } }

if(key == 3){ //方波 LED3 = 1;

for(x=0;x<10;x++){

DAC0832_PORT = 0xff; delayUser(1); }

for(x=10;x>0;x--){

DAC0832_PORT = 0x00; delayUser(1); } }

if(key == 4){ //锯齿 LED4 = 1;

for(x=0;x<256;x++){

DAC0832_PORT = x; _nop_(); } }

PCB原理图

PCB图