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| author | Jörg Hohensohn <hohensoh@rockbox.org> | 2003-11-07 21:03:41 +0000 |
|---|---|---|
| committer | Jörg Hohensohn <hohensoh@rockbox.org> | 2003-11-07 21:03:41 +0000 |
| commit | 7ec1c45d7913af6cac32d5150026ceffc6704bf4 (patch) | |
| tree | 5f17c9bdc99e02eaf17fe2235a1f87c89af7bacf /firmware | |
| parent | 7c3e9b1fba28a45fab8b9fa57572974d9a204d96 (diff) | |
| download | rockbox-7ec1c45d7913af6cac32d5150026ceffc6704bf4.tar.gz rockbox-7ec1c45d7913af6cac32d5150026ceffc6704bf4.zip | |
set/clear port bits with atomic instructions instead of read-modify-write, saves time+space, allows port usage in ISR
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4026 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/usb.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/firmware/usb.c b/firmware/usb.c index d513d10e55..00fec53afa 100644 --- a/firmware/usb.c +++ b/firmware/usb.c @@ -72,10 +72,14 @@ static void usb_enable(bool on) #endif if(on) - PADR &= ~0x400; /* enable USB */ + { + and_b(~0x04, &PADRH); /* enable USB */ + } else - PADR |= 0x400; - PAIOR |= 0x400; + { + or_b(0x04, &PADRH); + } + or_b(0x04, &PAIORH); } static void usb_slave_mode(bool on) |