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超简单的音乐频谱8*16 diy,带PCB 原理图 程序和制作教程
下面是主程序(完整代码在本帖最后附件里面下载):
- #include "src\STC12C5A.h"
- #include <intrins.h> //51基本运算(包括_nop_空函数)
- #include <math.h>
- #include "src\Define.h"
- ///////全局变量///////
- uchar data DelayTime=9; //<=8效果最好;
- uchar data INTTime=0x40; //0x40;
- uchar data gain=6;
- uchar data Menu=2;
- uchar idata refreshflag[40];
- uchar data LEDBuf[35]; //15列;从左到右;亮的位为真(1);
- uint32 data TouchKey=0;
- uchar data CBeep=0;
- //////////////////////
- void Delays(uint t)
- {
- uint j;
- while(--t)
- for(j=0;j<5;j++);
- }
- void Delaysms(uint t)
- {
- uint j;
- while(--t)
- for(j=0;j<15;j++);
- }
- #include "src\ADC.c"
- #include "src\Font.c"
- #include "src\fft.h"
- void PWM_init (void) //PWM初始化函数 //PWM模式,接P1.3接口(PWM0),强上拉.
- {
- CMOD=0x00; //设置PCA定时器 0x00~0x03;
- CL=0xEF;
- CH=0xEF;
- CCAPM0=0x42; //PWM0设置PCA工作方式为PWM方式(0100 0010)
- CCAP0L=0xEF; //设置PWM0初始值与CCAP0H相同
- CCAP0H=0xFF; // PWM0初始时为0
- CR=1; //启动PCA定时器
- }
- void PWM0_set (uchar set) //PWM0占空比设置函数 (0x00~0xFF)
- {
- CCAP0L= set; //设置值写入CCAP0L
- CCAP0H= set; //设置值写入CCAP0H
- }
- void IOINIT(void) //I/O强上拉模式;
- {
- P4SW = 0xff; //启动I/O:P4;
- P4M1 = B(00000000); P4M0 = B(10000000);P47=0;//震动马达;
- P0M1 = 0x00; P0M0 = 0xff; P0=0; //点阵列(Y)(L:OFF; H,H+:ON,ON+;)
- P1M1 = B(01000011); P1M0 = B(00110100);P1=B(10110111); //(P17@(高阻,IN)&P16@(高阻,IN);TouchKey) ... P14@(传统IO,Beep,IN) P13@(强推,OUT)呼吸灯 ... P11@(高阻,IN)AD2;P10@(高阻,IN)AD1;
- P2M1 = B(00000000); P2M0 = B(11111111);P2=0; //点阵行(X0(Left))(L:OFF; H,H+:ON,ON+;)
- P3M1 = B(00000000); P3M0 = B(11111111);P3=0; //点阵行(X1(Right))(L:OFF; H,H+:ON,ON+;)
- P1ASF =B(00000011); //将P10,P11的IO设置为模拟输入功能;
- // Y(P0)
- // ↑
- //H |
- // |
- // |
- //L |
- // ---------------------→
- // [L:X0(P2):H][L:X1(P3):H]
- //TestCode:
- // P0=B(10000000);
- // P2=B(00000001);
- // P3=B(00010000);
- }
- void BufToLED_Refresh() //Refresh&Write Buf to LED ;
- {
- uchar data i;
- uchar data X=1;
- uchar data Y=1;
- for(X=1,i=2;X;X<<=1,i+=2) //for(X=1;X!=0;X<<=1) //8bit
- {
- P2=X;
- for(Y=1;Y!=0;Y<<=1) //Y=Y<<1;
- {
- P0=Y&LEDBuf[i];
- Delays(DelayTime);
- P0=0;
- }
- P2=0;
- };
- for(X=1;X<B(10000000);X<<=1,i+=2) //7bit
- {
- P3=X;
- for(Y=1;Y!=0;Y<<=1) //Y=Y<<1;
- {
- P0=Y&LEDBuf[i];
- Delays(DelayTime);
- P0=0;
- }
- P3=0;
- };
-
- }
- void LEDRefresh_INT() interrupt 3 //using 3
- {
- static uint x=0;
- static uchar flag=1;
- TL1 = 0x00;
- TH1 = INTTime; //0x50~0x80
- if(flag)
- {
- if(++x==0xFF) //MINOUTPUT
- {
- flag=0;
- }
- }
- else
- {
- if(--x==0xCF) //MAXOUTPUT
- {
- flag=1;
- }
- }
- PWM0_set(x); //设置PWM占空比
- BufToLED_Refresh();
- }
- void Timer_INT()
- {
- TMOD = 0x11; //高4位控制T/C1
- EA = 1; //开总中断
- TH1 = 0x00; //16位计数寄存器T1高8位
- TL1 = 0x00; //16位计数寄存器T1低8位
- ET1 = 1; //T/C1中断开
- TR1 = 1; //T/C1启动
- }
- void FullScan()
- {
- uchar data X=1;
- uchar data Y=1;
- for(Y=1;Y!=0;Y<<=1) //Y=Y<<1;
- {
- P0=Y;
- for(X=1;X;X<<=1) //8bit
- {
- P2=X;
- Delays(7);
- };
- P2=0;
- for(X=1;X<B(10000000);X<<=1) //7bit
- {
- P3=X;
- Delays(7);
- };
- P3=0;
- P0=0;
- }
- }
- void Main()
- {
- uint data Count=700;
- uchar data i,Cgain,num=0;
- IOINIT();
- InitADC();
- while(--Count)
- FullScan();
- for(i=0;i<40;i++) refreshflag[i]=0x09;
-
- P14=0; //Beep
- Delays(4000);
- P14=1;
- PWM_init(); //PWM初始化
- PWM0_set(0xFB);
-
- Timer_INT();
- for(i=0;i<34;i++)
- LEDBuf[i]=0x00;
- FontDisp();
- while(520)
- {
- for(i=0;i<65;i++)
- {
- dd[i].real=(GetADCResult(0)+GetADCResult(1))<<gain; //读取ad结果并放大;
- }
- processfft();//傅立叶变化及处理
- ///////////////////TouchKey//////////////////////////
- while(P16==1) //依据:脉冲 干扰持续时间短;
- {
- if(CBeep)P14=0;
- if(++TouchKey>0x0000FF00)break;
- }
- P14=1;
- if(P16==1)
- {
- if(++Menu==4)Menu=0;
- P14=0;
- P47=1;
- Delays(7000);
- P14=1;
- P47=0;
- }
- TouchKey=0;
- //////////////////////////////////////////////
- if(P17==0)CBeep=!CBeep;
- if(dd[2].real<32)
- {
- if(++Count==300) //电平值过小,这降低gain,减少噪音的电平显示;
- {
- Count=0;
- //if(++Menu==4)Menu=0; //切换Menu,显示方式;
- gain=6;
- P14=0; //Beep
- Delays(1000);
- P14=1;
- }
- }
- else
- {
- Count=1;
-
- if(++num==0xAF) //播放时,Auto gain;
- {
- num=0;
- P14=0; //Beep
- Delays(700);
- P14=1;
- //自动增益;Automatic gain;
- Cgain=dd[2].real/32;
- if(7<Cgain<=8)
- {
- gain=4;
-
- }
- else if(4<Cgain<=6)
- {
- gain=5;
-
- }
- else if(2<Cgain<=4)
- {
- gain=6;
- }
- else
- {
- gain=7;
-
- }
-
- }
- }
- }
- while(1);
- }
复制代码
需要的拿走吧,请多多指教!!
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