Ale C.-
Example Audio Spectrum Analyzer
Revision 0:74f5a741c618, committed 2011-02-11
- Comitter:
- Suky
- Date:
- Fri Feb 11 00:37:57 2011 +0000
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DataCGRAM.h Fri Feb 11 00:37:57 2011 +0000
@@ -0,0 +1,8 @@
+const char CGRAM_DATA[64]={0,0,0,0,0,0,0,0x1F,
+ 0,0,0,0,0,0,0x1F,0x1F,
+ 0,0,0,0,0,0x1F,0x1F,0x1F,
+ 0,0,0,0,0x1F,0x1F,0x1F,0x1F,
+ 0,0,0,0x1F,0x1F,0x1F,0x1F,0x1F,
+ 0,0,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,
+ 0,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,
+ 0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F};
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FFT.lib Fri Feb 11 00:37:57 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/Suky/code/FFT/#e3af07c00c13
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_Serial.h Fri Feb 11 00:37:57 2011 +0000
@@ -0,0 +1,229 @@
+/*
+ @file LCD_Serial.h
+ @version: 1.0
+
+ @web www.micros-designs.com.ar
+ @date 05/02/11
+
+*- Version Log --------------------------------------------------------------*
+* Fecha Autor Comentarios *
+*----------------------------------------------------------------------------*
+* 05/02/11 Suky Original *
+*----------------------------------------------------------------------------*/
+///////////////////////////////////////////////////////////////////////////
+//// ////
+//// ////
+//// (C) Copyright 2011 www.micros-designs.com.ar ////
+//// Este codigo puede ser usado, modificado y distribuido libremente ////
+//// sin eliminar esta cabecera y sin garantia de ningun tipo. ////
+//// ////
+//// ////
+///////////////////////////////////////////////////////////////////////////
+#include "mbed.h"
+#include "DataCGRAM.h"
+
+class LCDSerial:public Stream {
+ public:
+ #define LCDClr 0x01 // Borra pantalla, cursor a Inicio
+ #define LCDHome 0x02 // Cursor a Inicio, DDRAM sin cambios
+ #define LCDIncCursor 0x06 // Modo incrementa cursor
+ #define LCDDecCursor 0x04 // Modo decrementa cursor
+ #define LCDOn 0x0C // Pantalla On
+ #define LCDOff 0x08 // Pantalla Off
+ #define LCDCursorOn 0x0E // Pantalla On, cursor On
+ #define LCDCursorOff 0x0C // Pantalla On, cursor Off
+ #define LCDCursorBlink 0x0F // Pantalla On, Cursor parpadeante
+ #define LCDCursorLeft 0x10 // Mueve cursor a la izquierda
+ #define LCDCursorRight 0x14 // Mueve cursor a la derecha
+ #define LCDDisplayLeft 0x18 // Mueve Display a la izquierda
+ #define LCDDisplayRight 0x1C // Mueve Display a la Derecha
+ /** Crea LCD interface
+ *
+ * @param DATA
+ * @param CLK
+ * @param E
+ */
+ LCDSerial(PinName DATA,PinName CLK,PinName E,PinName BACK=NC);
+ void vGotoxy(char x,char y);
+ void vSetBacklight(bool Value);
+ void vPutc(char Data);
+ void vCommand(char Data);
+ #if DOXYGEN_ONLY
+ /** Escribe un caracter en LCD
+ *
+ * @param c El caracter a escribir en LCD
+ */
+ int putc(int c);
+
+ /** Escribe un string formateado en LCD
+ *
+ * @param format A printf-style format string, followed by the
+ * variables to use in formating the string.
+ */
+ int printf(const char* format, ...);
+ #endif
+ private:
+ #define LcdType 2 // 0=5x7, 1=5x10, 2=varias lineas
+ #define LCD_LINE_1_ADDRESS 0x00
+ #define LCD_LINE_2_ADDRESS 0x40
+ #define LCD_LINE_3_ADDRESS 0x14
+ #define LCD_LINE_4_ADDRESS 0x54
+ #define LCD_COMMAND 0
+ #define LCD_DATA 1
+ DigitalOut _DATA,_CLK,_E,_BACK;
+ char NLinea;
+ // Stream implementation functions
+ virtual int _putc(int value);
+ virtual int _getc();
+ virtual void vWriteLCD(char Data,char Type);
+ virtual void vSetCGRAM(const char *Data);
+};
+
+
+LCDSerial::LCDSerial(PinName DATA,PinName CLK,PinName E,PinName BACK)
+ :_DATA(DATA),_CLK(CLK),_E(E),_BACK(BACK){
+ char Temp;
+
+ NLinea=1;
+ wait_ms(15);
+ _DATA=0;
+ _CLK=0;
+ _E=0;
+ _BACK=0;
+
+ for(int k=0;k<8;k++){
+ _CLK=1;
+ wait_us(1);
+ _CLK=0;
+ wait_us(1);
+ }
+
+ Temp=0x03;
+ for(int k=0;k<8;k++){
+ _DATA=!!(Temp&0x80);
+ Temp<<=1;
+ _CLK=1;
+ wait_us(1);
+ _CLK=0;
+ }
+ for(int k=0;k<3;k++){
+ _E=1;
+ wait_ms(2);
+ _E=0;
+ wait_ms(2);
+ }
+ Temp=0x02;
+ for(int k=0;k<8;k++){
+ _DATA=!!(Temp&0x80);
+ Temp<<=1;
+ _CLK=1;
+ wait_us(1);
+ _CLK=0;
+ }
+ _E=1;
+ wait_us(1);
+ _E=0;
+
+ vWriteLCD(0x20 | (LcdType<<2),LCD_COMMAND); // Tipo display.-
+ wait_ms(2);
+ vWriteLCD(0x01,LCD_COMMAND); // Borramos display.-
+ wait_ms(2);
+ vWriteLCD(0x06,LCD_COMMAND); // Incrementa cursor.-
+ vWriteLCD(0x0C,LCD_COMMAND); // Encendemos display.-
+ vSetCGRAM(CGRAM_DATA); // Guardamos data en CGRAM.-
+}
+
+void LCDSerial::vWriteLCD(char Data,char Type){
+ char data_temp;
+
+
+ wait_us(100);
+
+ data_temp=(Data>>4); // Rs es bit 4
+ if(Type){
+ data_temp|=0x10;
+ }
+ for(int i=0;i<8;i++){
+ _DATA=!!(data_temp & 0x80);
+ data_temp<<=1;
+ _CLK=1;
+ wait_us(1);
+ _CLK=0;
+ }
+
+ _E = 1;
+ wait_us(1);
+ _E = 0;
+ data_temp=(Data&0x0F); // Rs es bit 4
+ if(Type){
+ data_temp|=0x10;
+ }
+ for(int i=0;i<8;i++){
+ _DATA=!!(data_temp & 0x80);
+ data_temp<<=1;
+ _CLK=1;
+ wait_us(1);
+ _CLK=0;
+ }
+ _E = 1;
+ wait_us(1);
+ _E = 0;
+
+}
+
+void LCDSerial::vGotoxy(char x,char y){
+ char Direccion;
+
+ switch(y){
+ case 1:Direccion = LCD_LINE_1_ADDRESS;NLinea=1;break;
+ case 2:Direccion = LCD_LINE_2_ADDRESS;NLinea=2;break;
+ case 3:Direccion = LCD_LINE_3_ADDRESS;NLinea=3;break;
+ case 4:Direccion = LCD_LINE_4_ADDRESS;NLinea=4;break;
+ default:Direccion = LCD_LINE_1_ADDRESS;NLinea=1;break;
+ }
+
+ Direccion+=x-1;
+ vWriteLCD(0x80|Direccion,LCD_COMMAND);
+}
+
+int LCDSerial::_getc(){
+ return(-1);
+}
+
+int LCDSerial::_putc(int value){
+
+ switch(value){
+ case '\f':
+ vWriteLCD(0x01,LCD_COMMAND);
+ NLinea=1;
+ wait_ms(2);
+ break;
+ case '\n':
+ vGotoxy(1,++NLinea);
+ break;
+ default:
+ vWriteLCD(value,LCD_DATA);
+ }
+
+ return(value);
+}
+
+void LCDSerial::vSetBacklight(bool Value){
+ _BACK=Value;
+}
+
+void LCDSerial::vSetCGRAM(const char *Data){
+
+ vWriteLCD(0x40,LCD_COMMAND);
+ for(int k=0;k<64;k++){
+ vWriteLCD(*Data++,LCD_DATA);
+ }
+}
+
+void LCDSerial::vPutc(char Data){
+ _putc(Data);
+}
+
+void LCDSerial::vCommand(char Data){
+ vWriteLCD(Data,LCD_COMMAND);
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Feb 11 00:37:57 2011 +0000
@@ -0,0 +1,93 @@
+// Nothing special, an example for using the library of FFT, Audio Spectrum Analyzer with LCD
+#include "mbed.h"
+#include "FFT.h"
+#include "LCD_Serial.h"
+// **********************************************************************************************
+#define N 32
+float Data[N*2];
+unsigned char PowerInt[N/2];
+volatile int kbhit;
+float Average;
+
+AnalogIn ChannelR(p16);
+AnalogIn ChannelL(p17);
+AnalogIn ChannelC(p18);
+LCDSerial myLcd(p21,p22,p23,p24); // Data, Clock, Enable, Back
+// **********************************************************************************************
+void vUpdateDataAnalogs(float Analogs[]);
+void vGraphicDisplay(unsigned char *Data);
+// **********************************************************************************************
+int main() {
+ myLcd.vSetBacklight(1);
+ myLcd.printf("\f FFT with mbed!!!");
+ wait(2.0);
+ myLcd.printf("\f");
+
+ Average=0;
+ for(int k=0;k<64;k++){
+ Average+=ChannelC.read_u16();
+ wait_us(100);
+ }
+ Average/=64;
+
+ while(1){
+ vUpdateDataAnalogs(Data);
+ vFFT(Data-1,N);
+ vCalPowerInt(Data,PowerInt,N/2);
+ vGraphicDisplay(PowerInt);
+ wait_ms(30);
+ }
+}
+// **********************************************************************************************
+void vUpdate(void){
+ kbhit=1;
+}
+void vUpdateDataAnalogs(float Analogs[]){
+ unsigned short TempReadR[32],TempReadL[32];
+ Ticker Period;
+
+ kbhit=0;
+ Period.attach_us(&vUpdate,25); // 25 us, 40.000 Hz
+ for(int k=0;k<32;k++){
+ while(kbhit==0);
+ kbhit=0;
+ TempReadR[k]=ChannelR.read_u16();
+ }
+ for(int k=0;k<32;k++){
+ while(kbhit==0);
+ kbhit=0;
+ TempReadL[k]=ChannelL.read_u16();
+ }
+ Period.detach();
+ for(int k=0,j=0;k<32;k++,j++){
+ Analogs[j]=(TempReadR[k]+TempReadL[k])/2; // Promedio (x1[n]+x2[n]=X1[k]+X2[k])
+ Analogs[j]=((float)(Analogs[j]-Average)/10); // Desplazo y aplico escala.-
+ Analogs[++j]=0;
+ }
+ return;
+}
+// **********************************************************************************************
+void vGraphicDisplay(unsigned char *Data){
+ unsigned char k;
+
+ myLcd.vGotoxy(3,1);
+ for(k=0;k<16;k++,Data++){
+ if(*Data>192){myLcd.vPutc((*Data-193)/8);}else{myLcd.vPutc(' ');}
+ }
+ myLcd.vGotoxy(3,2);
+ Data-=16;
+ for(k=0;k<16;k++,Data++){
+ if((*Data>128)&&(*Data<193)){myLcd.vPutc((*Data-129)/8);}else if(*Data>192){myLcd.vPutc(0x07);}else{myLcd.vPutc(' ');}
+ }
+ myLcd.vGotoxy(3,3);
+ Data-=16;
+ for(k=0;k<16;k++,Data++){
+ if((*Data>64)&&(*Data<129)){myLcd.vPutc((*Data-65)/8);}else if(*Data>128){myLcd.vPutc(0x07);}else{myLcd.vPutc(' ');}
+ }
+ myLcd.vGotoxy(3,4);
+ Data-=16;
+ for(k=0;k<16;k++,Data++){
+ if((*Data>0)&&(*Data<65)){myLcd.vPutc((*Data-1)/8);}else if(*Data>64){myLcd.vPutc(0x07);}else{myLcd.vPutc(' ');}
+ }
+
+ }
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Feb 11 00:37:57 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/9a9732ce53a1