fftavr.h

AVR单片机MEGA128驱动ks0108控制的LCD

/*
 * fftAvr.h
 * 
 * This Library handels the communication to an FFT calculating AVR via
 * the TWI.
 * 
 * 26/01/2005
 * 
 * Copyright (C) 2005, Fabian Maximilian Thiele
 * [e-mail]
 * http://www.apetech.de
 */

#ifndef FFT_AVR_H
#define FFT_AVR_H

// Uncomment this to use interrupt controlled transmission. A user supplied
// callback function is called, when the transmission is complete.
#define FFT_USE_INTERRUPT

typedef void (*fftAvrResultCallback)(uint8_t*);

// TWI-Address
#define FFT_AVR_TWI_ADDR		0x10

// FFT-Mode
#define	FFT_HI_RES				1
#define FFT_HI_RES_PEAK			2
#define FFT_LO_RES				3
#define FFT_LO_RES_PEAK			4
#define	FFT_MIXED				5
#define FFT_MIXED_PEAK			6

// Spectrum length
#define FFT_HI_RES_LEN			64
#define FFT_LO_RES_LEN			64
#define FFT_MIXED_LEN			78

// FFT-Addresses
#define FFT_HI_RES_ADDR			0x0000
#define FFT_HI_RES_PEAK_ADDR	0x0040
#define	FFT_LO_RES_ADDR			0x0080
#define	FFT_LO_RES_PEAK_ADDR	0x00C0
#define FFT_MIXED_ADDR			0x0100
#define	FFT_MIXED_PEAK_ADDR		0x014E

/*
 * This function reads the requested spectrum out of the FFT AVR. In
 * non-interrupt mode the function waits until the end of the transmission,
 * in interrupt mode the transmission is only initialized. A previously
 * supplied callback is called out of the isr, when the transmission has
 * finished. If no callback is supplied the global variable fftAvrTransComp
 * will be set to one.
 */
void fftAvrReadSpectrum(uint8_t fftMode, uint8_t* buffer);

#ifdef	FFT_USE_INTERRUPT
	extern volatile uint8_t fftAvrTransComp;

	// Sets the callback function for interrupt controlled spectrum
	// transmission.
	void fftAvrSetCallback(fftAvrResultCallback callback);
	
	// Default transmission complete callback
	void fftAvrTransmissionComplete(uint8_t* buffer);
#endif

#endif