Rockbox Development > New Ports
Rockbox Player - Project to design and build a Free/Open hardware audio player
casainho:
--- Quote from: friendlyzookeeper on February 11, 2009, 02:18:17 AM ---Hello,
I'm going to work on a ARM7 (at91sam7s256) diy board. Waiting on parts right now. Using a smd adapter board for the microcontroller. Haven't figured out on an extra ram chip yet. Going with the usb tiny arm jtag.
I still need to figure out the extra 5v power source for the video. Maybe an extra voltage regulator off the input power or an inductor with an boost converter (max756). I'm going to use a mcp130t for the reset or another kind of supervisor. Still alot to think about, but going to start soon.
--- End quote ---
Fun, because I received today at home my first at91sam7s256 on Olimex dev board :-) -- I will also start working with ARM7 for my projects and I will use the usb tiny arm jtag as I bought it and I am using on Rockbox Player project.
At Rockbox Player project, bootloader is working, loads firmware correctly to SDRAM from the SD Card, and jumps to it.
Firmware is working if I run it as a stand alone application, but, if loaded by bootloader, it hangs on some interrupt vector... - so, I am now working to understand what initialization code should not run in firmware if loaded by bootloader...
casainho:
Ok, here is the main menu image:
There is yet a lot of work to be done for a full working port.
scharkalvin:
Just found this:
http://www.circuit-ed.com/128x64-TouchScreen-GLCD-with-RGB-Backlight-P168C8.aspx
Looks like a nice, cheap graphic lcd with a touch screen and RGB backlight.
casainho:
--- Quote from: scharkalvin on February 13, 2009, 04:03:36 PM ---Just found this:
http://www.circuit-ed.com/128x64-TouchScreen-GLCD-with-RGB-Backlight-P168C8.aspx
Looks like a nice, cheap graphic lcd with a touch screen and RGB backlight.
--- End quote ---
There is a lot of options, but now LCD is working and we can move ahead. We need to get a working "prototype" and try to get the help of any online shop that can produce and sell online to worldwide, the Rockbox Player hardware. For sure that actual prototype will change a lot!! but after we will see, it will depend more of the technology that company will want to use, etc.
dkamin:
I have been working for some time on a portable MP3 player and came by Rockbox and your player port. I have since switched my efforts to supporting your project instead of working on my own for now. I am a couple of days away from sending off for a prototype based off your existing specs plus a few more for future incorporation.
Looking at your daughterboard for the Olimex board, I cannot determine your switch needs and would like to discuss your design plans for user input so I can layout the board appropriately.
Also, since you are using the Olimex board which is based on the Atmel evaluation board, there are a few questions that I need answered based on your current port.
Does your bootloader use external dataflash, nandflash or just the internal dataflash?
Are you using or planning on using the EEPROM to persist settings?
Do you see a need for a serial interface or is the USB interface sufficient?
Do you see a need for an external RTC or use the processor to keep date/time?
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