Rockbox mail archive
Subject: Re: PIC12C508A-based remote - some remarks
From: Rob Ward (wards_at_paradise.net.nz)
I might add, avr-gcc is a nice port of gcc that works for many ATMEL
microcontrollers, but I'm not sure about the AT Tiny series. They may be
assembler only. But even the AT Mega8 which has about 32 pins is a tiny
device - about 10mm * 10mm * 1mm thick and costs about $5 USD.
Tjerk Schuringa wrote:
>Another suggestion for an eight pin MCU could be Atmel's AVR12. Advantage of
>this thingie: EEPROM programmable, open drain output pin (that the '508 lacks
>and which I found essential in the 16LF84). The internal oscillator (1.2 MHz
>LoPo version) is much more accurate, only a few percent which the Archos UART
>won't object to. The '508 would be questionable, if we're lucky it's just
>within Archos' limits. Other than that it's pretty much the same with regard to
>power consumption, only it will work down to 1.8 V. Also the commands are more
>like 8051, which will make programmers rejoice :-)
>About the questions:
>1. I don't think REW and FF do more than one command on the original remote.
>Repeat operation is simply not implemented.
>2. Other functions don't seem to be available. Maybe there's something in the
>archive on this, I haven't checked.
>A propos battery life: my 16LF84 based contraption still works after a year. I
>use it occasionally. The battery seems at its end of life though: even if it
>tests OK (3.1 V or something) the remote stopped working after heavy use
>recently. As I didn't have a multimeter handy (rode the train when that
>happened) I don't know why. I'll try to investigate (yeah, right). In any case
>it seems to be much better than Archos' remote!
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Page was last modified "Jan 10 2012" The Rockbox Crew