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authorLinus Nielsen Feltzing <linus@haxx.se>2005-07-17 15:59:32 +0000
committerLinus Nielsen Feltzing <linus@haxx.se>2005-07-17 15:59:32 +0000
commit170bb8eb78703bd6f2ae951e2292c89ae7565a29 (patch)
treeeb1091a3e9af0ea684d85a00638f48b9db46e527 /firmware
parentcd8bfeb8a36197080703a21def84eb2da173d23c (diff)
downloadrockbox-170bb8eb78703bd6f2ae951e2292c89ae7565a29.tar.gz
rockbox-170bb8eb78703bd6f2ae951e2292c89ae7565a29.zip
iriver: Reduced LCD write cycle length to 65ns, almost halving the execution time for lcd_update, from 1.8ms to 1ms in 120MHz
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7181 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
-rw-r--r--firmware/system.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/firmware/system.c b/firmware/system.c
index 1e42fab9e7..219ad976bc 100644
--- a/firmware/system.c
+++ b/firmware/system.c
@@ -521,7 +521,7 @@ void set_cpu_frequency(long frequency)
PLLCR &= ~1; /* Bypass mode */
PLLCR = 0x11853005;
CSCR0 = 0x00000980; /* Flash: 2 wait state */
- CSCR1 = 0x00002580; /* LCD: 9 wait states */
+ CSCR1 = 0x00000980; /* LCD: 2 wait states */
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
This may take up to 10ms! */
DCR = (DCR & ~0x01ff) | MAX_REFRESH_TIMER; /* Refresh timer */
@@ -540,7 +540,7 @@ void set_cpu_frequency(long frequency)
PLLCR &= ~1; /* Bypass mode */
PLLCR = 0x10886001;
CSCR0 = 0x00000180; /* Flash: 0 wait states */
- CSCR1 = 0x00000980; /* LCD: 2 wait states */
+ CSCR1 = 0x00000180; /* LCD: 0 wait states */
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
This may take up to 10ms! */
DCR = (DCR & ~0x01ff) | NORMAL_REFRESH_TIMER; /* Refresh timer */