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Rockbox mail archiveSubject: The iFP port (and its connection with the iPod port)The iFP port (and its connection with the iPod port)
From: Tomasz Malesinski <tmal_at_mimuw.edu.pl>
Date: Sat, 7 Jan 2006 23:47:41 +0100 I have just sent this mail to the rockbox list by mistake. Obviously, it should be sent here. I have prepared a patch adding the iFP target. I would like the patch to be reviewed and hopefully committed to CVS: https://sourceforge.net/tracker/index.php?func=detail&aid=1399410&group_id=44306&atid=439120 Compared to previous versions, with this patch some of the plugins compile and work. Codecs also compile, but often cause the player to crash. I haven't worked on this issue yet. Audio output is not implemented also. Buttons assignment in the user interface and plugins needs correction. The UI simulator for the iFP could also be useful. If someone would like to contribute to the port, but does not want to deal with hardware details, I would suggest considering the above tasks. So far I have found only 1 MB of RAM in the player. I have not disassembled the player, so I don't know what chip is actually inside. Because of small amount of RAM I disabled building the aac codec for the iFP target. Some of the changes may affect the iPod port. I added an instruction disabling IRQs at the beginning of crt0.s and I also changed ending of crt0.s in order not to enable IRQs. The iFP port requires that the system_init is called before the interrupts may be enabled. I also implemented the set_irq_level function for ARM in the system.h file. This way the interrupts are enabled in the init function. Therefore I would like the iPod port developers to test if the patch does not break the iPod target. I tried to compile the code without the -mlong-calls option in order to get more compact code. The compilation failed because the long calls are required in case of IRAM located functions. It should be possible to fix this by adding __attribute((long_call))__ to those functions, but it did not work. The functions were still called with BL. Does anyone know what could be the reason? -- Tomek MalesinskiReceived on 2006-01-07 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |