课程设计简易波形发生器(7)

write_data(0x66);

write_data(0x3a); }

void write_f(uint date) //写频率 {

uchar qian,bai,shi,ge; qian=date/1000; bai=date/100; shi=date/10; ge=date;

write_com(0x80+0x42); write_data(0x30+qian); write_data(0x30+bai); write_data(0x30+shi); write_data(0x30+ge); write_data(0x48); write_data(0x5a); }

void xsf() //显示频率 {

if(s1num==1) {

fre=(1000/(9+3*ys)); write_f(fre); }

if(s1num==2) {

fre=(100000/(3*ys)); write_f(fre); }

if(s1num==3) {

fre=(1000/(15+3*ys)); write_f(fre); } }

void keyscanf() {

d=0;

if(s1==0) {

delay(5);

26

if(s1==0) {

while(!s1); s1num++;

if(s1num==1) {

ys=0;

write_com(0x80+0x05);

write_data(0x73); //写sine: write_data(0x69); write_data(0x6e); write_data(0x65); write_data(0x20);

write_data(0x20); }

if(s1num==2) {

ys=10;

write_com(0x80+0x05); write_data(0x73); // write_data(0x71); write_data(0x75); write_data(0x61); write_data(0x72); write_data(0x65); } if(s1num==3) {

ys=0;

write_com(0x80+0x05); write_data(0x74); write_data(0x72); write_data(0x61); write_data(0x69); write_data(0x6e); write_data(0x20); }

if(s1num==4) {

s1num=0; P1=0;

write_com(0x80+0x05); write_data(0x20);

27

写squrae //写train

write_data(0x20); write_data(0x20); write_data(0x20); write_data(0x20);

write_data(0x20); write_com(0x80+0x42); write_data(0x20); write_data(0x20); write_data(0x20); write_data(0x20); write_data(0x20); write_data(0x20); } } }

if(s2==0) {

delay(5); if(s2==0) {

while(!s2); ys++; } }

if(s3==0) {

delay(5); if(s3==0) {

while(!s3); ys--; } } }

void main() {

init(); while(1) {

keyscanf();

if(s1num==1) //正弦波// {

for(j=0;j<255;j++)

28

{

P0=tosin[j]; delay1(ys); }

}

if(s1num==2) //方波// { P0=0xff;

delay1(ys); P0=0;

delay1(ys); }

if(s1num==3) //三角波// {

if(a<128) {

P0=a;

delay1(ys); } else {

P0=255-a; delay1(ys); } a++; }

if(!(s1&s2&s3)) {

xsf(); } } }

29

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库课程设计简易波形发生器(7)在线全文阅读。