音频信号分析仪(快速傅里叶变换).zip

#include "LCD12864.h" #include "STC12C5A.h" #include "intrins.h" /************************************************************** iO口宏定义区 ***************************************************************/ sbit LCD12864_CS = P3^5;//RS sbit LCD12864_SID = P3^6;//r/w sbit LCD12864_SCK = P3^7;//e /******************************************************************* 常量声明区 ********************************************************************/ unsigned char code AC_TABLE[]={ //坐标编码 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97, 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f, 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f, }; /**************************************************************** 发送一个字节 *****************************************************************/ void LCD12864_SendByte(unsigned char Dbyte) { unsigned char i; for(i=0;i<8;i++) { LCD12864_SCK = 0; Dbyte=Dbyte<<1; LCD12864_SID = CY; LCD12864_SCK = 1; LCD12864_SCK = 0; } } /********************************************************** 接收一个字节 ***********************************************************/ unsigned char LCD12864_ReceiveByte(void) { unsigned char i,temp1,temp2; temp1=temp2=0; for(i=0;i<8;i++) { temp1=temp1<<1; LCD12864_SCK = 0; LCD12864_SCK = 1; LCD12864_SCK = 0; if(LCD12864_SID) temp1++; } for(i=0;i<8;i++) { temp2=temp2<<1; LCD12864_SCK = 0; LCD12864_SCK = 1; LCD12864_SCK = 0; if(LCD12864_SID) temp2++; } return ((0xf0&temp1)+(0x0f&temp2)); } /**************************************************************** 检查忙状态 ******************************************************************/ void LCD12864_CheckBusy( void ) { do LCD12864_SendByte(0xfc); //11111,RW(1),RS(0),0 while(0x80&LCD12864_ReceiveByte()); } /****************************************************************** 写一个字节的指令 *******************************************************************/ void LCD12864_WriteCmd( unsigned char Cbyte ) { LCD12864_CS = 1; LCD12864_CheckBusy(); LCD12864_SendByte(0xf8); //11111,RW(0),RS(0),0 LCD12864_SendByte(0xf0&Cbyte); LCD12864_SendByte(0xf0&Cbyte<<4); LCD12864_CS = 0; } /************************************************************* 写一个字节的数据 **************************************************************/ void LCD12864_WriteData( unsigned char Dbyte ) { LCD12864_CS = 1; LCD12864_CheckBusy(); LCD12864_SendByte(0xfa); //11111,RW(0),RS(1),0 LCD12864_SendByte(0xf0&Dbyte); LCD12864_SendByte(0xf0&Dbyte<<4); LCD12864_CS = 0; } /****************************************************************** lcd初始化函数 *******************************************************************/ void LCD12864_Init( void ) { LCD12864_WriteCmd(0x30); LCD12864_WriteCmd(0x03); LCD12864_WriteCmd(0x0c); LCD12864_WriteCmd(0x01); LCD12864_WriteCmd(0x06); _nop_();_nop_();_nop_(); LCD12864_ClearTXT(); LCD12864_ClearBMP(); } /****************************************************************************** 设定光标函数 ******************************************************************************/ void LCD12864_SetCursor(unsigned char x,unsigned char y) { switch(x) { case 0: x=0x80;break; case 1: x=0x90;break; case 2: x=0x88;break; case 3: x=0x98;break; default: x=0x80; } y=y&0x07; LCD12864_WriteCmd(0x30); LCD12864_WriteCmd(y+x); LCD12864_WriteCmd(y+x); } /*********************************************************************************** 清除文本 ************************************************************************************/ void LCD12864_ClearTXT( void ) { unsigned char i; LCD12864_WriteCmd(0x30); LCD12864_WriteCmd(0x80); for(i=0;i<64;i++) LCD12864_WriteData(0x20); LCD12864_SetCursor(0,0); } /************************************************************************************** 清除图片 *****************************************************************************************/ void LCD12864_ClearBMP( void ) { unsigned char i,j; LCD12864_WriteCmd(0x34); LCD12864_WriteCmd(0x36); for(i=0;i<32;i++) { LCD12864_WriteCmd(0x80|i); LCD12864_WriteCmd(0x80); for(j=0;j<32;j++) LCD12864_WriteData(0); } } /**************************************************************************************** 显示字符串 *****************************************************************************************/ void LCD12864_PutStr(unsigned char row,unsigned char col,unsigned char const *puts) { LCD12864_WriteCmd(0x30); LCD12864_WriteCmd(AC_TABLE[8*row+col]); while(*puts != '\0') { if(col==8) { col=0; row++; } if(row==4) row=0; LCD12864_WriteCmd(AC_TABLE[8*row+col]); LCD12864_WriteData(*puts); puts++; if(*puts != '\0') { LCD12864_WriteData(*puts); puts++; col++; } } } /**************************************************************************************** 显示数字 *****************************************************************************************/ void LCD12864_PutNum(unsigned char row,unsigned char col,unsigned int num) { LCD12864_WriteCmd(0x30); LCD12864_WriteCmd(AC_TABLE[8*row+col]); if(num<100) //两位数 { LCD12864_WriteData(num/10+48); LCD12864_WriteData(num%10+48); }else { LCD12864_WriteData((num/1000)+48); LCD12864_WriteData(((num%1000)/100)+48); LCD12864_WriteData(((num%100)/10)+48); LCD12864_WriteData((num%10)+48); } } /************************************************************************** 显示全屏图片 ***************************************************************************/ void LCD12864_PutBMP(unsigned char const *puts) { unsigned int x=0,y=0; unsigned char i,j; LCD12864_WriteCmd(0x34); LCD12864_WriteCmd(0x36); for(i=0;i<32;i++) { LCD12864_WriteCmd(0x80|i); LCD12864_WriteCmd(0x80); for(j=0;j<16;j++) { LCD12864_WriteData(puts[x]); x++; } y=x-16; for(j=0;j<16;j++) { LCD12864_WriteData(puts[y+512]); y++; } } } void PutXiao(unsigned char row,unsigned char col,unsigned long i) { LCD12864_WriteCmd(0x30); LCD12864_WriteCmd(AC_TABLE[8*row+2*col]); if(i<1000) { LCD12864_WriteData((((unsigned long)i%1000)/100)+48); LCD12864_WriteData((((unsigned long)i%100)/10)+48); LCD12864_WriteData(((unsigned long)i%10)+48); LCD12864_WriteData(72); LCD12864_WriteData(122); } else if(i>=1000000) { LCD12864_WriteData(((unsigned long)i/100000000)+48); LCD12864_WriteData(((unsigned long)i%100000000)/10000000+48); LCD12864_WriteData(((unsigned long)i%10000000)/1000000+48); LCD12864_WriteData(0x2e); LCD12864_WriteData(((unsigned long)(i*100)%100000000)/10000000+48); LCD12864_WriteData(((unsigned long)(i*100)%10000000)/1000000+48); LCD12864_WriteData(((unsigned long)(i*100)%1000000)/100000+48); LCD12864_WriteData(77); LCD12864_WriteData(72); LCD12864_WriteData(122); } else { LCD12864_WriteData(((unsigned long)i/100000)+48); LCD12864_WriteData(((unsigned long)i%100000)/10000+48); LCD12864_WriteData(((unsigned long)i%10000)/1000+48); LCD12864_WriteData(0x2e); LCD12864_WriteData(((unsigned long)i%1000)/100+48); LCD12864_WriteData(((unsigned long)i%100)/10+48); LCD12864_WriteData((unsigned long)i%10+48); LCD12864_WriteData(75);