main.cpp

00001 #include "mbed.h"
00002 #include "neopixel.h"
00003 #include "si5351a.h"
00004 
00005 I2C i2c(D0, D1);                   //通信Si5351A
00006 SI5351A clk(i2c, 25000000UL);      //基础时钟25MHz
00007 Pixel Column[20];                  //单个数组
00008 Pixel Column_All[280];             //全局数组
00009 NeoPixelOut neoPixel(D9);          //数据输出
00010 Timeout PeakDecrease;              
00011 
00012 DigitalOut reset=D4;               //重置MSGEQ7
00013 DigitalOut strobe=D3;              //选择MSGEQ7输出
00014 AnalogIn analog1_7=A0;             //数据读取1-7
00015 AnalogIn analog8_14=A1;            //数据读取8-14
00016 //AnalogIn mod=A2;                  //选择模式输入
00017 AnalogIn sensitive=A5;
00018 AnalogIn brightness=A6;
00019 
00020 
00021 int NumColumn=14;                  //灯柱数量
00022 int Peak[14]={0};                 
00023 int PeakDecreaseTime_us=50*1e3;    //peak下降延迟时间
00024 int colorPeak;           //peak颜色
00025 int __mode;
00026 float freqData[14];
00027 float noise=0.1;
00028 
00029 float mode=0.1;
00030 int num=0;
00031 
00032 
00033 //-------------------------------设置Peak降落的互钳函数
00034 void toggleOff(void);
00035 void toggleOn(void){
00036     for(int i=0;i<NumColumn;i++){
00037         if(Peak[i]>-2) Peak[i]--;    
00038     }
00039     num++;
00040     if(num==200){
00041         if(mode<=0.5) mode=mode+0.1;
00042         else mode=0.1;
00043         num=0;
00044     }
00045     PeakDecrease.attach_us(toggleOff,PeakDecreaseTime_us);
00046 }
00047 void toggleOff(void){
00048     for(int i=0;i<NumColumn;i++){
00049         if(Peak[i]>-2) Peak[i]--;    
00050     }
00051     PeakDecrease.attach_us(toggleOn,PeakDecreaseTime_us);
00052 }
00053 //-----------------------------------------取最大值函数
00054 int max(int i,int j){
00055     if(i>j)return i;
00056     else return j;
00057 }
00058 //---------------------------------------------读取MSGEQ7的返回值
00059 void Read() {
00060     reset = 1;
00061     //wait_ns(150);    //最小值100ns
00062     reset = 0;
00063     wait_us(200);
00064     for (int i = 0; i < 7; i++){
00065         strobe = 0;
00066         wait_us(50);                      //待输出稳定
00067         freqData[i*2]=analog1_7*(0.5+2*sensitive);
00068         freqData[i*2+1]=analog8_14*(0.5+2*sensitive);
00069         strobe = 1;
00070         wait_us(40);             //strobe最小间隔72us，此处取90us 
00071     }
00072 }
00073 //-------------------------------------------初始颜色
00074 int colorBegin(){
00075     int __mode=(int)(mode*10);    //__mode范围为1,2,3,4,5,6,7,8,9
00076     switch(__mode){
00077         case 1:
00078             colorPeak=0xFF0000;
00079             return 0x00FF00;//
00080         case 2:
00081             colorPeak=0xFF0000;
00082             return 0x0000FF;//
00083         case 3:
00084             colorPeak=0xFFFF00;
00085             return 0xFF33CC;//
00086         case 4:
00087             colorPeak=0x990099;
00088             return 0xFF3366;//
00089         case 5:
00090             colorPeak=0x0000FF;
00091             return 0x000000;//
00092         case 6:
00093             colorPeak=0xFF0000;
00094             return 0x00FF00;
00095         case 7:
00096             colorPeak=0xFF0000;
00097             return 0x00FF00;
00098         case 8:
00099             colorPeak=0xFF0000;
00100             return 0x00FF00;
00101         case 9:
00102             colorPeak=0xFF0000;
00103             return 0x00FF00;
00104         default:
00105             colorPeak=0xFF0000;
00106             return 0x00FF00;
00107 
00108     }
00109 }
00110 //------------------------------------------设置模式，每个数字对应一种颜色变换方式
00111 int colorTransformation(int __color,int i){
00112     switch(__mode){
00113         case 1:
00114             return __color+0x060009-0x000B00;//绿色
00115         case 2:
00116             return __color+0x0B0000-0x00000C;//蓝色
00117         case 3:
00118             switch(i){
00119                 case 0:return   0xFF33CC;    case 1:return   0xFF33FF;    case 2:return   0xCC33FF;    case 3:return   0x9933FF;     case 4:return    0x6633FF;    
00120                 case 5:return   0x3333FF;    case 6:return   0x3366FF;    case 7:return   0x3399FF;    case 8:return   0x33CCFF;     case 9:return    0x33FFFF;    
00121                 case 10:return  0x33FFCC;    case 11:return  0x33FF99;    case 12:return  0x33FF66;    case 13:return  0x33FF33;     case 14:return   0x66FF33;    
00122                 case 15:return  0x99FF33;    case 16:return  0xCCFF33;    case 17:return  0xFFFF33;    case 18:return  0xFFCC33;     case 19:return   0xFF9933;   
00123                 default: return  0x000000;
00124             }//粉黄
00125         case 4:
00126             switch(i){
00127                 case 0:return   0xFF3366;    case 1:return   0xFF33CC;    case 2:return   0xCC33FF;    case 3:return   0x6633FF;     case 4:return    0x3366FF;    
00128                 case 5:return   0x33CCFF;    case 6:return   0x33FFCC;    case 7:return   0x33FF66;    case 8:return   0x66FF33;     case 9:return    0xCCFF33;    
00129                 case 10:return  0xFFCC33;    case 11:return  0xFF6633;    case 12:return  0xFF33CC;    case 13:return  0xFF33FF;     case 14:return   0x9933FF;    
00130                 case 15:return  0x3333FF;    case 16:return  0x3399FF;    case 17:return  0x33FFFF;    case 18:return  0x33FF99;     case 19:return   0x33FF33;   
00131                 default: return  0x000000;
00132             }//
00133         case 5:
00134             return 0X000000;//红色无
00135         case 6:
00136             return __color;
00137             break;
00138         case 7:
00139             return __color;
00140             break;
00141         case 8:
00142             return __color;
00143             break;
00144         case 9:
00145             return __color;
00146         default:
00147             return __color+0x06000C;
00148 
00149     }
00150 }
00151 //------------------------------------------确定单个column的颜色
00152 void run(int j){
00153     __mode=mode*10;
00154     int __color=colorBegin();
00155     int H=((freqData[j]-noise)*19);
00156     for(int i=0; i<20; i++) {
00157         if(i>H) Column[i].hex=0;
00158         else Column[i].hex=__color;
00159         __color=colorTransformation(__color,i);  
00160     }
00161     Column[max(Peak[j],H)].hex=colorPeak;
00162     if(Peak[j]<H) Peak[j]=H;//当Peak小于H时，上拉Peak到最顶端
00163 }
00164 //-------------------------------------------main
00165 int main()
00166 {
00167     strobe=1;
00168     reset=0;                     //initialize
00169     clk.set_frequency(SI5351_CLK1, 104570);
00170     clk.set_frequency(SI5351_CLK0, 190000);
00171     wait_us(200*1000); // 等待HSE稳定
00172     neoPixel.normalize = false; // 使r+g+b=255 均匀每个led亮度
00173     //Peakdecrease.detach();
00174     toggleOn();//打开PeakDecrease
00175     while(1) {
00176         Read();
00177         neoPixel.global_scale = brightness; //亮度调节
00178         //for(int x=0;x<14;x++) printf("%4.d ",(int)(freqData[x]*100));//test
00179         //printf("\n");//test
00180         for(int j=0;j<NumColumn;j++){     
00181             run(j);
00182             for(int k=20*j;k<20*(j+1);k++){
00183                 Column_All[k].hex=Column[k%20].hex;  
00184             }
00185         }
00186         neoPixel.send(Column_All, NumColumn*20);
00187     }
00188 }