单片机+AD9833+LCD1602+独立按键程序 -

#include <reg52.h>
#include <math.h>
#define uchar8 unsigned char
#define uint16 unsigned int
#define ulong32 unsigned long
//给正弦、三角、方波编码
#define SIN 0
#define TRI 1
#define SQU 2
//显示字库
uchar8 code table_desk[]="WAV FRE M K 1";
uchar8 code table_wave[]="sintrisqu";
uchar8 code table_num[]="0123456789";
uint16 Config_Data[8]={0};
//AD9833控制端
sbit FSYNC=P3^4;
sbit SCLK=P3^3;
sbit SDATA=P3^2;
//1602液晶控制端
sbit lcden = P0^7;
sbit lcdrs = P0^6;
//
sbit KEY0 = P0^0;
sbit KEY1 = P0^1;
sbit KEY2 = P0^2;
sbit KEY3 = P0^3;
sbit KEY4 = P0^4;
sbit KEY5 = P0^5;
//
sbit LED0 = P1^0;
sbit LED1 = P1^1;
sbit LED2 = P1^2;
sbit LED3 = P1^3;
sbit LED4 = P1^4;
sbit LED5 = P1^5;
bit fre_r = 0;//AD9833的两个频率字寄存器建议交替使用
uchar8 wav = 0;//波形，默认正弦波
ulong32 fre = 1000;//频率，默认1KHz
uchar8 meg = 0 ,hunk= 0, tenk = 0,tho = 1,hun=0 ,ten = 0, uni = 0;//频率字的各个位
uchar8 bit_select = 0;//频率位调节的选择标志
uchar8 num; //公用循环增量
//AD9833的驱动函数
void Wave_Generate(ulong32,uchar8);
//1ms延时函数
void delay(uint16 z)
{
uint16 x,y;
for(x = z;x>0;x--)
for(y =110;y>0;y--);
}
//向液晶写命令，rs端置低
void write_com(uchar8 com)
{
delay(5);
delay(5);
P2 = com;
lcdrs = 0;
lcden = 1;
lcden = 0;
}
//向液晶写数据,rs端置高即可
void write_date(uchar8 date)
{
delay(5);
delay(5);
P2 = date;
lcdrs = 1;
lcden = 1;
lcden = 0;
}
//液晶初始化
void init_lcd()
{
lcden = 0;
write_com(0x38);//16×2显示，5×7点阵，8位数据接口
delay(5);
write_com(0x0c);//开显示，不显示光标
delay(5);
write_com(0x06);//写一个字符之后地址指针自动加1
delay(5);
write_com(0x01);//显示清零，数据指针清零
}
//波形标示函数，在第二行前三个字符标明信号波形
void wave(uchar8 w_wave)
{
write_com(0xc0);//定位到第二行第一字符
switch(w_wave)
{
case 0:
for(num = 0;num < 3;++num)
{
write_date(table_wave[num]);
delay(5);
}
break;
case 1:
for(num = 3;num < 6;++num)
{
write_date(table_wave[num]);
delay(5);
}
break;
case 2:
for(num = 6;num < 9;++num)
{
write_date(table_wave[num]);
delay(5);
}
break;
default:
for(num = 0;num < 3;++num)
{
write_date('?');
delay(5);
}
break;
}
}
//////////////////////////////////////////
//向ad9833写一命令字(2Bytes)
void AD9833_Send_Word(uint16 Data_In)
{
uchar8 i;
uchar8 j;
SCLK=1;
FSYNC=0;
for(i=0;i<16;i++)
{
SCLK=1;
SDATA=(bit)((Data_In & 0x8000)>>15);
j=0x01;
while(j--);
SCLK=0;
Data_In=Data_In<<1;
j=0x01;
while(j--);
}
FSYNC=1;
SCLK=0;
}
//波形发生函数
//入口参数: 频率:Freq (<=12000000)
// 形状:0(正弦波),1(三角波),2(方波)
//默认: Fmclk=25MHz, 0相移，方波不分频.
void Wave_Generate(ulong32 Freq,uchar8 Shape)
{
ulong32 temp;
uchar8 k;
if(Freq>12000000) Freq=12000000;
switch(Shape)
{
case 0: Config_Data[0]=0x2108; // 0010 0001 0000 1000 reset(D8) =1
Config_Data[7]=0x2008; // 0010 0000 0000 1000
break;
case 1: Config_Data[0]=0x210A; //0010 0001 0000 1010
Config_Data[7]=0x200A; //0010 0000 0000 1010
break;
case 2: Config_Data[0]=0x2128; //0010 0001 0010 1000
Config_Data[7]=0x2028; //0010 0000 0010 1000
break;
default:Config_Data[0]=0x2108; //0010 0001 0000 1000
Config_Data[7]=0x2008; //0010 0000 0000 1000
}
temp=(long)(((double)Freq)*10.737418); //temp=Freq*(0x10000000/20000000);
Config_Data[1]=temp&0x00003fff; //0000 0000 0000 0000 0011 1111 1111 1111
Config_Data[3]=Config_Data[1];
Config_Data[2]=(temp&0x0fffc000)>>14; //0000 1111 1111 1111 1100 0000 0000 0000
Config_Data[4]=Config_Data[2];
Config_Data[1]=Config_Data[1]|0x4000; //0100 0000 0000 0000
Config_Data[2]=Config_Data[2]|0x4000; //0100 0000 0000 0000
Config_Data[3]=Config_Data[3]|0x8000; //1000 0000 0000 0000
Config_Data[4]=Config_Data[4]|0x8000; //1000 0000 0000 0000
Config_Data[5]=0xC000; //1100 0000 0000 0000
Config_Data[6]=0xE000; //1110 0000 0000 0000
for(k=0;k<8;k++)
{
AD9833_Send_Word(Config_Data[k]);
}
}
void Wave_Fre_ALT(bit fre_reg,ulong32 Freq)//寄存器
{
ulong32 temp;
if(Freq>12000000) Freq=12000000;
temp=(long)(((double)Freq)*10.737418); //temp=Freq*(0x10000000/20000000);268435456/25=10.737418,25是晶振频率268435456/30=8.947848
Config_Data[0]=Config_Data[0] & 0x3eff; // 0011 1110 1111 1111
Config_Data[1]=temp&0x00003fff; //0000 0000 0000 0000 0011 1111 1111 1111
Config_Data[2]=(temp&0x0fffc000)>>14; //0000 1111 1111 1111 1100 0000 0000 0000
Config_Data[5]=0xC000; //1100 0000 0000 0000
Config_Data[6]=0xE000; //1110 0000 0000 0000
if(fre_reg)
{
Config_Data[1]=Config_Data[1]|0x8000; //1000 0000 0000 0000连续的两个频率字的16 15位为10
Config_Data[2]=Config_Data[2]|0x8000; //1000 0000 0000 0000表示写到频率寄存器1
Config_Data[7]=Config_Data[7]|0x0800; //0000 1000 0000 0000控制字的FSELECT为1/////////^^^^^^^^^^^^^^^^^
}
else
{
Config_Data[1]=Config_Data[1]|0x4000; //0100 0000 0000 0000
Config_Data[2]=Config_Data[2]|0x4000; //0100 0000 0000 0000
Config_Data[7]=Config_Data[7]&0xf7ff; //1111 0111 1111 1111//……………………………………………………………………………………………………………难道是以前的写错了？
}
AD9833_Send_Word(Config_Data[0]);
AD9833_Send_Word(Config_Data[1]);
AD9833_Send_Word(Config_Data[2]);
AD9833_Send_Word(Config_Data[5]);
AD9833_Send_Word(Config_Data[6]);
AD9833_Send_Word(Config_Data[7]);
}
////////////////////////////////////////////
//在1602指定位显示数据
void write_lcd(uchar8 whe,uchar8 n)
{
if(whe < 16)//第一行
{
write_com(0x80+whe-1);
write_date(n);
}
else //第二行 21表示第二行第一个位置
{
write_com(0x80+0x40 + whe-21);
write_date(n);
}
}
//键盘扫描函数，根据不同的按键进行相应波形和频率的设置
void keyscan()
{
if(!KEY0)//切换波形
{
delay(10);
if(!KEY0)
{
++wav;
if(wav > 2)
wav = 0;
LED0 = 0;
wave(wav);
write_com(0x0c);
Wave_Generate(fre,wav);
while(!KEY0);
LED0 = 1;
}
}
if(!KEY1)//切换频率的不同数位
{
delay(10);
if(!KEY1)
{
LED1 = 0;
write_com(0x0e);//显示光标
++bit_select; //选择的频率字的位移动
if(bit_select > 7)
{
bit_select = 1;
}
write_com(0xcf - bit_select ); //光标移动到相应的位上
while(!KEY1);
LED1 = 1;
}
}
if(!KEY2)//频率数字加按钮
{
delay(10);
if(!KEY2)
{
LED2 = 0;
switch(bit_select)
{
case 1:
++uni;
if(uni > 9)uni = 0;
write_lcd(35,table_num[uni]);
write_com(0xce);//写完光标自动加1了，要把光标移回来
break;
case 2:
++ten;
if(ten > 9)ten = 0;
write_lcd(34,table_num[ten]);
write_com(0xcd);
break;
case 3:
++hun;
if(hun > 9)hun = 0;
write_lcd(33,table_num[hun]);
write_com(0xcc);
break;
case 4:
++tho;
if(tho > 9)tho = 0;
write_lcd(32,table_num[tho]);
write_com(0xcb);
break;
case 5:
++tenk;
if( tenk > 9)tenk = 0;
write_lcd(31,table_num[tenk]);
write_com(0xca);
break;
case 6:
++hunk;
if( hunk > 9)hunk = 0;
write_lcd(30,table_num[hunk]);
write_com(0xc9);
break;
case 7:
++meg;
if(meg > 2)meg = 0;
write_lcd(29,table_num[meg]);
write_com(0xc8);
break;
}
while(!KEY2);
LED2 = 1;
}
}
if(!KEY3)
{
delay(10);
if(!KEY3)
{
LED3 = 0;
fre = 1000000*((ulong32)meg) + 100000*((ulong32)hunk) + 10000*((ulong32)tenk) + 1000*((ulong32)tho) + 100*((ulong32)hun) + 10*((ulong32)ten) + (ulong32)uni;
write_com(0x0c);//关闭光标
fre_r = !fre_r;//这里要写个LED灯的测试程序试试
Wave_Fre_ALT(fre_r,fre);
while(!KEY3);
LED3 = 1;
}
}
}
void init_scr()
{
//在第一行显示 WAV FRE M K 1
write_com(0x80);
for(num = 0;num<15;num++)
{
write_date(table_desk[num]);
delay(5);
}
//在第二行显示默认sin 00001000
//即正弦波，频率1KHz
write_com(0xc0);
for(num = 0;num < 3;++num)
{
write_date(table_wave[num]);
delay(5);
}
write_com(0xc0 + 8);
for(num = 0;num < 7;++num)
{
if(3 == num)
{
write_date('1');
delay(5);
}
else
{
write_date('0');
delay(5);
}
}
}
void main()
{
init_lcd();
init_scr();
Wave_Generate(50000,0);
while(1)
{
keyscan();
}
}

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