Mostly for the sake of reducing latency for audio servicing where other service
routines can take a long time to complete, leading to occasional drops of a
few samples, especially in recording, where they are fairly frequent.
One mystery that remains is GPIOA IRQ being interrupted causes strange
undefined instruction exceptions, most easily produced on my Fuze V2 with a
scrollwheel. Making GPIOA the top ISR for now, thus not interruptible, cures it.
SVC mode is used during the actual calls. Hopefully the SVC stack size is
sufficient. Prologue and epilogue code only uses the IRQ stack and is large
enough.
Any routine code that should not be interrupted should disable IRQ itself from
here on in.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31642 a1c6a512-1295-4272-9138-f99709370657
- Revert BUTTON_HOME
- Modifications to SD driver (µSD not working yet)
TODO: µSD and FM radio
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27492 a1c6a512-1295-4272-9138-f99709370657
- remove udelay(1) and use the previous busy loop : the delay was too
long for proper hold detection
- remove the 2nd delay (unneeded)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25741 a1c6a512-1295-4272-9138-f99709370657
Use it in fuzev2 to improve some big delays (correct the biggest one to actually wait for the fifo to empty), and use it in the sd drivers.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25734 a1c6a512-1295-4272-9138-f99709370657
Revive the delay removed by r25636 (and make it longer so it works when
boosted)
Also read GPIOA pins 7 & 6 in one load
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25722 a1c6a512-1295-4272-9138-f99709370657
Move scrollwheel parsing function into separate file as it's reused.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25425 a1c6a512-1295-4272-9138-f99709370657
- buttonlight works
- backlight turns on (quite weak though and no brightness adjustment/backlight off functional)
- don't share drivers with e200v2/fuzev1 for now as it's not entirely clear how dbop plays into this
- deactivte scrollwheel as it's messing up the timer setup in kernel-as3525.c indicating the dbop input reading doesn't work well
- still no working bootloader/no lcd or buttons
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25225 a1c6a512-1295-4272-9138-f99709370657
