Rockbox Development > New Ports
SanDisk Sansa m200 series (v1)
shotofadds:
I've now got a 512Mb M230 in the post (hopefully it's a v1), in the hope that working out the NAND translation scheme might be easier/quicker with only 1/8th of the data to wade around in compared to the 4Gb D2.
But, in order to do this I need a way to run tcctool with the NAND attached. Any bright ideas?
skaos:
Is this any help:
http://forums.sandisk.com/sansa/board/message?board.id=m200&thread.id=1501
http://anythingbutipod.com/forum/showthread.php?t=20366
shotofadds:
Well, those threads seem to suggest the daughterboard can be "hotswapped" without damaging the player, but that seems rather risky to me! :o
If that really is the case (and if there really is no other way to enter USB-boot mode) then I suppose it could be an avenue to explore. Eg. boot using tcctool with the NAND unplugged, loop for a while until the NAND board is plugged in, etc.
It'd be quite far from an ideal development environment, of course...
rickbronson:
For what it's worth, I"ve "hot swapped" the NAND daughter board at least a 100 times and it still works. You actually don't have to fully engage the connector to get it to work, just apply some pressure (squeeze the two boards together) gently. Because snapping it totally on and off is a pain.
I tried porting tcc780x to tcc77x and the correspoinding NAND file but I don't seem to be able to get the NAND id's from the chip. Looking at the disassembled code I thought the chip enables might be on GPIOE bits 0x30 so I tried those in all 4 states but still nothing. I've been thinking of alternatives...
Why can't I load SANSM200.rom with tcctool? It seems like it should work but I don't get anything.
If I use the crc code routine snippit in TCC77X.pdf on SANSM200.rom I don't get the correct CRC at offset 0x10. Any ideas on this?
Is it true that if I put SANSM200.rom in the root partition it will perform an upgrade? I tried this and when I booted it with a half dead battery it said "Cannot perform upgrade with dead battery" and proceeded to delete the file. I'm thinking of trying this on a fresh battery and a modified SANSM200.rom.
One last thought - anyone know anything about a serial port (UART) output available?
skaos:
Serial port - does datasheets for tcc760 and tcc780 help:
http://files.myopera.com/ch%D0%B5t/files/1TCC76xRev0[1].05.rar
http://www.telechips.com/kor/inc/download3.asp?file_gbn=D&board_id=122&file_url=/webupload/data_board&file_name=TCC780_DataSheet_r0.09.pdf
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version