diff options
Diffstat (limited to 'firmware/target/arm/tcc780x/cowond2')
-rw-r--r-- | firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c | 7 |
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) | |||
77 | /* Delay loop based on CPU frequency (FREQ>>23 is 3..22 for 32MHz..192MHz) */ | 77 | /* Delay loop based on CPU frequency (FREQ>>23 is 3..22 for 32MHz..192MHz) */ |
78 | static void delay_loop(void) | 78 | static void delay_loop(void) |
79 | { | 79 | { |
80 | unsigned long x; | 80 | asm volatile (" mov %[freq], %[freq], asr#23 \n\t" |
81 | for (x = (unsigned)(FREQ>>23); x; x--); | 81 | "1: subs %[freq], %[freq], #1 \n\t" |
82 | " bne 1b" | ||
83 | : : [freq] "r" (cpu_frequency) : "memory"); | ||
82 | } | 84 | } |
85 | |||
83 | #define DELAY delay_loop() | 86 | #define DELAY delay_loop() |
84 | 87 | ||
85 | static void ltv250qv_write(unsigned int command) | 88 | static void ltv250qv_write(unsigned int command) |