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-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)