Rockbox Development > New Ports
Rockbox Player - Project to design and build a Free/Open hardware audio player
casainho:
--- Quote from: JdGordon on February 22, 2010, 06:15:28 PM ---stop talking crazy!
rockbox as an app is one of our long term goals and this seem to be a perfect testbed
--- End quote ---
Ok, I readed now the Bagder blog message about this subject.
If we could manufacture our electronics boards, we could also print the enclosures and then make at home our full costum Rockbox device :-)
My dream is to use new tecnhologies to make a simple and cheap player/recorder, just for audio. If anyone want video or games, then go with Rockbox as an app on Android or anything else.
I wish I could build a board using cheap ARM Cortex M3, with external 4MB RAM and small and cheap color LCD. Then I could also print at home my enclosure for it and have a full portable DAP running Rockbox at my hands :-)
casainho:
I went to IRC Rockbox channel and developers told me there that ARM Cortex M3 will not work, lack of power processing/speed.
While Opendous quit the idea of using LPC313x for a multimedia device system, he is pursuing with another ARM. I am waiting for see what he can do. At least I am working in plastic enclosure, so I think if he can produce the boards including the LCD and battery, I can put it inside a plastic enclosure and create a complete device :-)
torne:
No, you were told that the Cortex-M3 will not work because it can only run Thumb2 instructions, and Rockbox cannot currently be compiled for Thumb/Thumb2 (it's been tried in the past and makes things go wrong for reasons nobody spent enough time to figure out).
Whether a specific M3 setup is actually fast enough is a totally different issue. In terms of raw CPU performance the M3 is unlikely to be *slower* than an ARM7 (e.g. PortalPlayer) at the same clock speed, and may be significantly faster (ARM has gotten a lot better over the years)... but memory accesses might be too slow, perhaps (not sure what the caching arrangements are for the available M3-based chips).
casainho:
--- Quote from: torne on February 25, 2010, 07:13:57 AM ---No, you were told that the Cortex-M3 will not work because it can only run Thumb2 instructions, and Rockbox cannot currently be compiled for Thumb/Thumb2 (it's been tried in the past and makes things go wrong for reasons nobody spent enough time to figure out).
Whether a specific M3 setup is actually fast enough is a totally different issue. In terms of raw CPU performance the M3 is unlikely to be *slower* than an ARM7 (e.g. PortalPlayer) at the same clock speed, and may be significantly faster (ARM has gotten a lot better over the years)... but memory accesses might be too slow, perhaps (not sure what the caching arrangements are for the available M3-based chips).
--- End quote ---
Thanks for the clarification :-)
I wish there was more developers interested in playing with hardware...
casainho:
--- Quote from: L0rd_asuka on February 25, 2010, 09:58:38 AM ---I think it would be a waste to develop something like this for 1 messly custom made MP3 player because nobody on here would be able to use it or develop for it except you...
--- End quote ---
The idea is to develop something we can build at home or a small fab, and being Open Hardware. Like now we have the possibility of making our own plastic enclosures thanks to Open Hardware 3D printers like RepRap. We can also design/assembly our custom electronics boards and make small fabs at home - peole is being doing this and selling directly on communities.
--- Quote from: L0rd_asuka on February 25, 2010, 09:58:38 AM ---Maybe you should help me with my Rockbox Port for PSP GO PM Me...
--- End quote ---
Go and ask help for the company who make and sell it to you. Maybe you could start asking them for the schematics and datasheets of electronic components.
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