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authorRob Purchase <shotofadds@rockbox.org>2010-07-11 22:21:33 +0000
committerRob Purchase <shotofadds@rockbox.org>2010-07-11 22:21:33 +0000
commit8a07e78a06f0c0d25307b72af36bc5d09098956d (patch)
tree453c6528442109dc357bf764a48c9e4fb0176474 /firmware
parentc9a4fb0d0d988447f7232855abdb9c681e01469b (diff)
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D2: Fix another timing loop that broke when we switched to the EABI compiler, this time in the LCD driver.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27395 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
-rw-r--r--firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c b/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c
index 3f1e2e0312..ab50769983 100644
--- a/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c
+++ b/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c
@@ -77,9 +77,12 @@ void lcd_set_contrast(int val)
/* Delay loop based on CPU frequency (FREQ>>23 is 3..22 for 32MHz..192MHz) */
static void delay_loop(void)
{
- unsigned long x;
- for (x = (unsigned)(FREQ>>23); x; x--);
+ asm volatile (" mov %[freq], %[freq], asr#23 \n\t"
+ "1: subs %[freq], %[freq], #1 \n\t"
+ " bne 1b"
+ : : [freq] "r" (cpu_frequency) : "memory");
}
+
#define DELAY delay_loop()
static void ltv250qv_write(unsigned int command)