buzzer.c

ucCos移植到广州友善nano2410

#include "..\inc\def.h"
#include "..\inc\2410addr.h"
#include "..\inc\2410lib.h"

#define C1      262     // Do
#define C1_     277
#define D1      293     // Re
#define D1_     311
#define E1      330     // Mi
#define F1      360     // Pa
#define F1_     370
#define G1      392     // Sol
#define G1_     415
#define A1      440     // La
#define A1_     466
#define B1      494     // Si

#define C2      C1*2    // Do
#define C2_     C1_*2
#define D2      D1*2    // Re
#define D2_     D1_*2
#define E2      E1*2    // Mi
#define F2      F1*2    // Pa
#define F2_     F1_*2
#define G2      G1*2    // Sol
#define G2_     G1_*2
#define A2      A1*2    // La
#define A2_     A1_*2
#define B2      B1*2    // Si

void Play(void);

//Timer main clock - PCLK
void Buzzer_Freq_Set( U32 freq )
{
	rGPBCON &= ~3;			//set GPB0 as tout0, pwm output
	rGPBCON |= 2;
		
	rTCFG0 &= ~0xff;
	rTCFG0 |= 15;			//prescaler = 15+1
	rTCFG1 &= ~0xf;
	rTCFG1 |= 2;			//mux = 1/8 --扁夯 林颇荐 390Khz
	
	rTCNTB0 = (PCLK>>7)/freq;  //林颇荐 拌魂(TCNTB0-鸥捞赣 墨款飘(傈眉甫 墨款磐甫 割备埃栏肺 唱喘巴牢啊? - 林颇荐)
	rTCMPB0 = rTCNTB0>>1;	// 50%
	rTCON &= ~0x1f;
	rTCON |= 0xb;			//disable deadzone, auto-reload, inv-off, update TCNTB0&TCMPB0, start timer 0
	rTCON &= ~2;			//clear manual update bit
}

void Buzzer_Stop(void)
{
	rGPBCON &= ~3;			//set GPB0 as output
	rGPBCON |= 1;
	rGPBDAT &= ~1;
}

void Beep(U32 freq, U32 ms)
{
	Buzzer_Freq_Set(freq) ;
	Delay(ms) ;
	Buzzer_Stop() ;
}

void BUZZER_PWM_Test(void)
{
	U16 freq = 1000 ;
	
	Uart_Printf( "\nBUZZER TEST ( PWM Control )\n" );
   	Uart_Printf( "Press +/- to increase/reduce the frequency of BUZZER !\n" ) ;
	Uart_Printf( "Press 'ESC' key to Exit this program !\n\n" );
	
	Buzzer_Freq_Set( freq ) ;

    while( 1 )
    {
		U8 key = Uart_Getch();

		if( key == '+' )
		{
			if( freq < 20000 )
				freq += 10 ;
				
			Buzzer_Freq_Set( freq ) ;
		}

		if( key == '-' )
		{
			if( freq > 11 )
				freq -= 10 ;
				
			Buzzer_Freq_Set( freq ) ;
		}
		
		Uart_Printf( "\tFreq = %d\n", freq ) ;
		
		/*
		if( key = 'p')
		    Play();
		*/    
		if( key == ESC_KEY )
		{
			Buzzer_Stop() ;
			break ;
		}
	}
	Play();
}

void Play(void)
{
	
	Uart_Printf( "\nPlay Music\n") ;

	Buzzer_Freq_Set(C1);
	Delay(500);
	Buzzer_Freq_Set(C1_);
	Delay(500);
	Buzzer_Freq_Set(D1);
	Delay(500);
	Buzzer_Freq_Set(D1_);
	Delay(500);
	Buzzer_Freq_Set(E1);
	Delay(500);
	Buzzer_Freq_Set(F1);
	Delay(500);
	Buzzer_Freq_Set(F1_);
	Delay(500);
	Buzzer_Freq_Set(G1);
	Delay(500);
	Buzzer_Freq_Set(G1_);
	Delay(500);
	Buzzer_Freq_Set(A1);
	Delay(500);
	Buzzer_Freq_Set(A1_);
	Delay(500);
	Buzzer_Freq_Set(B1);
	Delay(500);
}