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Old 29th August 2002, 08:54 AM   #11
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Any one an idea how i can make the files available to you all ???

grtz

Simon
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Old 29th August 2002, 03:28 PM   #12
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Quote:
Originally posted by blu_line
I hope you all can download the files from the following location:

http://blu_dot.tripod.com/audio/sch.pdf

http://blu_dot.tripod.com/audio/Final_V1.c

Otherwise give me a mail.

The design is based around a PIC16F84 with several PCF8574's so called IO expanders.
The PIC does the decoding of the RC5 codes send from a standard remote control. Every Device, cd, TV, has its own 5bit address followed by the command, being volume up/down etc.
The decoded RC5 codes are here indeed used for volume control, channel control and steering of an LCD.

The RC5 receiver is a standard device which is sensitive to the particular 38KHz modulated code. The device just gives you serially what you've send.

The micro also decodes the rotaty encoders, also used for volume and channel control.

After decoding all the stuff and updating the respective variables it is send out via I2C to the io expanders.
These control relays for the volume and channel selection.

The SW is in C and written for the CC5X compiler.
The eval version lets you make code of 1k max. But that is enough in this case.

Via a PIC programmer (dont buy that expensive stuff, look for the taite programmer and SW) i download the code into flash.
And that is it folks.


grtz

Simon
Hi blu-line,

I'm also involved in a project using i/o expansion. As far as I know, the 16F84 doesn't have I2S onboard, did you implement that in software? Any particular problem with that?

Jan Didden
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Old 30th August 2002, 05:49 AM   #13
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Hello Jan,

I indeed implemented the I2C driver in SW.
There were no problems.
It will cost you a few lines of code and 3 pins.
The 3 pins are necessary for the CLK, data_in and data_out.

If you have anmy particular questions, just mail me !


grtz

Simon
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Old 30th August 2002, 08:53 AM   #14
guido is offline guido  Netherlands
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Hi,

16F84 to decode RC5 and control a preamp. Sounds familiar to me, check my website. Programming here is in assembly, pic is in sleepmode when no code is received. Other features are an encoder on the volume pot to read the position and the pic can control my kenwood tuner via kenwood XS protocol (8bit version).

The RC5 decoding routines are on the site, i put them there because they are based on a statemachine in software. Works very well. Preamp itself is the Audio&Techniek P11 (Hawk audio nowadays). Tube stuff.

Greetings,

Guido
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Old 30th August 2002, 10:07 AM   #15
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The "Guido" of Guido Tent ?

Ah well, when you think of it more people probably invented the wheel in this case.

grtz

Simon
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Old 31st August 2002, 04:18 PM   #16
yugaaa is offline yugaaa  India
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hi palesha,
there is a kit avaliable in chennai and the remote control is based on a philips ic.it has got adjustments for a valume control ,balance,mute ,2inputs,bass and treble.plus a timer .The shop sells it as an addon kit.i personally didnot check the remote control on my amp as i did not want unwanted distortion.
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Old 1st September 2002, 08:29 AM   #17
guido is offline guido  Netherlands
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Nope,

Not the Guido as in Guido Tent. Although both dutch (think it is an italian name).. And i am using his clock in my CD63.. Small world. If there is anything usefull, drop me an email.

Greetings,

The other ''Guido"
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