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2007-09-29 by usafcjf2003
Hey Guys, I am looking for a way to store audio on my ATmega64L board and then play it back thru a peripheral module. I have been crawling google for a few hours and havent found anything. Anyone ever done this before and had any luck? Ohh yea, i have only been using AVR for about 2 months now, but I understand the basics.... We will be going into interrupts in class next week.
2007-09-29 by usafcjf2003
Yes and no.... I went thru some of them, and I found something that does sine wave note building, But i am finding it hard to port to my board. IE, they use registers and variables that arn't defined for my ATmega64L. Also, i think I might .... might be able to use this sine wave output, if i could figure out how to parse RAW (wav???) data to the SRAM.
2007-09-29 by Don Kinzer
--- In AVR-Chat@yahoogroups.com, "usafcjf2003" <usafcjf2003@...> wrote: > if i could figure out how to parse RAW (wav???) data to the SRAM. The GoldWave audio editor (free download at http://www.goldwave.com) can be used to generate a series of datapoints representing the instantaneous relative amplitude of an audio signal. Once you have the series of datapoints, you can then use a digital-to- analog conversion technique (e.g. PWM) to regenerate the audio signal. This is the general idea implemented in the PlaySound() subroutine in the ZBasic System Library (see http://www.zbasic.net/doc/ZBasicSysLib.php?page=169). Don Kinzer ZBasic Microcontrollers http://www.zbasic.net
2007-09-29 by John Samperi
At 08:33 AM 30/09/2007, you wrote: > I have been crawling >google for a few hours and havent found anything. Have you been crawling Atmel's application notes? Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************
2007-09-30 by John Samperi
At 09:35 AM 30/09/2007, you wrote: >IE, they use registers and variables that arn't defined for my >ATmega64L. ALL REGISTERS are the same in ALL AVRs no matter the size of the chip. What do you mean variables that are not defined? Variable have nothing to do with the chip type but are only tags for the assembler or C compiler. > might be able to use this sine wave output, If you are working with C look at app note AVR335, if with ASM then there is a design note DN39 that you can download from AVRfreaks. Of course you will/may have to do some adaptation to your environment but that's half of the fun... Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************